Module:Citation/CS1/Identifiers: Difference between revisions

m
1 revision imported
(Created page with " local identifiers = {}; --[[--------------------------< F O R W A R D D E C L A R A T I O N S >-------------------------------------- ]] local is_set, in_array, set_erro...")
m (1 revision imported)
 
(4 intermediate revisions by 3 users not shown)
Line 1:
 
local identifiers = {};
 
 
--[[--------------------------< F O R W A R D D E C L A R A T I O N S >--------------------------------------
]]
 
local has_accept_as_written, is_set, in_array, set_errorset_message, select_one, add_maint_cat, substitute; -- functions in Module:Citation/CS1/Utilities
substitute, make_wikilink;
 
local z; -- table of tables defined in Module:Citation/CS1/Utilities
Line 13 ⟶ 10:
 
 
--[[--------------------------< EP XA TG E R N AS LC _O LP IE N K _V A R I DA B L E S >----------------------------------------------
 
declare variables here that have page-wide scope that are not brought in from other modules; that are created here and used here
Formats a wiki style external link
 
]]
 
local auto_link_urls = {}; -- holds identifier URLs for those identifiers that can auto-link |title=
local function external_link_id(options)
local url_string = options.id;
local ext_link;
if options.encode == true or options.encode == nil then
url_string = mw.uri.encode( url_string );
end
ext_link = mw.ustring.format ('[%s%s%s %s]', options.prefix, url_string, options.suffix or "", mw.text.nowiki(options.id));
if is_set(options.access) then
ext_link = substitute (cfg.presentation['access-signal'], {ext_link, cfg.presentation[options.access]}); -- add the free-to-read / paywall lock
end
return mw.ustring.format( '[[%s|%s]]%s%s', options.link, options.label, options.separator or "&nbsp;", ext_link);
end
 
 
--============================<< H E L P E R F U N C T I O N S >>============================================
--[[--------------------------< I N T E R N A L _ L I N K _ I D >----------------------------------------------
 
--[[--------------------------< W I K I D A T A _ A R T I C L E _ N A M E _ G E T >----------------------------
Formats a wiki style internal link
 
as an aid to internationalizing identifier-label wikilinks, gets identifier article names from Wikidata.
]]
 
returns :<lang code>:<article title> when <q> has an <article title> for <lang code>; nil else
local function internal_link_id(options)
return mw.ustring.format( '[[%s|%s]]%s[[%s%s%s|%s]]',
options.link, options.label, options.separator or "&nbsp;",
options.prefix, options.id, options.suffix or "",
mw.text.nowiki(options.id)
);
end
 
for identifiers that do not have q, returns nil
 
for wikis that do not have mw.wikibase installed, returns nil
--[[--------------------------< IS _ V A L I D _ I S X N >-----------------------------------------------------
 
]]
ISBN-10 and ISSN validator code calculates checksum across all isbn/issn digits including the check digit.
ISBN-13 is checked in check_isbn().
 
local function wikidata_article_name_get (q)
If the number is valid the result will be 0. Before calling this function, issbn/issn must be checked for length
if not is_set (q) or (q and not mw.wikibase) then -- when no q number or when a q number but mw.wikibase not installed on this wiki
and stripped of dashes, spaces and other non-isxn characters.
return nil; -- abandon
end
 
local wd_article;
]]
local this_wiki_code = cfg.this_wiki_code; -- Wikipedia subdomain; 'en' for en.wikipedia.org
 
wd_article = mw.wikibase.getSitelink (q, this_wiki_code .. 'wiki'); -- fetch article title from WD; nil when no title available at this wiki
local function is_valid_isxn (isxn_str, len)
 
local temp = 0;
if wd_article then
isxn_str = { isxn_str:byte(1, len) }; -- make a table of byte values '0' → 0x30 .. '9' → 0x39, 'X' → 0x58
wd_article = table.concat ({':', this_wiki_code, ':', wd_article}); -- interwiki-style link without brackets if taken from WD; leading colon required
len = len+1; -- adjust to be a loop counter
for i, v in ipairs( isxn_str ) do -- loop through all of the bytes and calculate the checksum
if v == string.byte( "X" ) then -- if checkdigit is X (compares the byte value of 'X' which is 0x58)
temp = temp + 10*( len - i ); -- it represents 10 decimal
else
temp = temp + tonumber( string.char(v) )*(len-i);
end
end
 
return temp % 11 == 0; -- returns true if calculation result is zero
return wd_article; -- article title from WD; nil else
end
 
 
--[[--------------------------< IS _ V A L I DN K _ IL SA XB NE L _ 1M A K 3E >------------------------------------------------
 
common function to create identifier link label from handler table or from Wikidata
ISBN-13 and ISMN validator code calculates checksum across all 13 isbn/ismn digits including the check digit.
If the number is valid, the result will be 0. Before calling this function, isbn-13/ismn must be checked for length
and stripped of dashes, spaces and other non-isxn-13 characters.
 
returns the first available of
1. redirect from local wiki's handler table (if enabled)
2. Wikidata (if there is a Wikidata entry for this identifier in the local wiki's language)
3. label specified in the local wiki's handler table
]]
 
local function is_valid_isxn_13link_label_make (isxn_strhandler)
local temp=0wd_article;
if not (cfg.use_identifier_redirects and is_set (handler.redirect)) then -- redirect has priority so if enabled and available don't fetch from Wikidata because expensive
isxn_str = { isxn_str:byte(1, 13) }; -- make a table of byte values '0' → 0x30 .. '9' → 0x39
wd_article = wikidata_article_name_get (handler.q); -- if Wikidata has an article title for this wiki, get it;
for i, v in ipairs( isxn_str ) do
temp = temp + (3 - 2*(i % 2)) * tonumber( string.char(v) ); -- multiply odd index digits by 1, even index digits by 3 and sum; includes check digit
end
return temp % 10 == 0; -- sum modulo 10 is zero when isbn-13/ismn is correct
return (cfg.use_identifier_redirects and is_set (handler.redirect) and handler.redirect) or wd_article or handler.link;
end
 
 
--[[--------------------------< CE HX T E CR KN A L _ L I SN BK N_ I D >------------------------------------------------------------
 
Formats a wiki-style external link
Determines whether an ISBN string is valid
 
]]
 
local function check_isbnexternal_link_id ( isbn_str options)
local url_string = options.id;
if nil ~= isbn_str:match("[^%s-0-9X]") then
local ext_link;
return false, 'invalid character'; -- fail if isbn_str contains anything but digits, hyphens, or the uppercase X
local this_wiki_code = cfg.this_wiki_code; -- Wikipedia subdomain; 'en' for en.wikipedia.org
local wd_article; -- article title from Wikidata
if options.encode == true or options.encode == nil then
url_string = mw.uri.encode (url_string, 'PATH');
end
 
isbn_str = isbn_str:gsub( "-", "" ):gsub( " ", "" ); -- remove hyphens and spaces
if options.auto_link and is_set (options.access) then
local len = isbn_str:len();
auto_link_urls[options.auto_link] = table.concat ({options.prefix, url_string, options.suffix});
if len ~= 10 and len ~= 13 then
return false, 'length'; -- fail if incorrect length
end
 
ext_link = mw.ustring.format ('[%s%s%s %s]', options.prefix, url_string, options.suffix or "", mw.text.nowiki (options.id));
if len == 10 then
if is_set (options.access) then
if isbn_str:match( "^%d*X?$" ) == nil then -- fail if isbn_str has 'X' anywhere but last position
ext_link = substitute (cfg.presentation['ext-link-access-signal'], {cfg.presentation[options.access].class, cfg.presentation[options.access].title, ext_link}); -- add the free-to-read / paywall lock
return false, 'invalid form';
end
return is_valid_isxn(isbn_str, 10), 'checksum';
else
if isbn_str:match( "^%d+$" ) == nil then
return false, 'invalid character'; -- fail if isbn13 is not all digits
end
if isbn_str:match( "^97[89]%d*$" ) == nil then
return false, 'invalid prefix'; -- fail when isbn13 does not begin with 978 or 979
end
return is_valid_isxn_13 (isbn_str), 'checksum';
end
 
return table.concat ({
make_wikilink (link_label_make (options), options.label), -- redirect, Wikidata link, or locally specified link (in that order)
options.separator or '&nbsp;',
ext_link
});
end
 
 
--[[--------------------------< I SN MT E R N A L _ L I N K _ I D >----------------------------------------------------------------------
 
Formats a wiki-style internal link
Determines whether an ISMN string is valid. Similar to isbn-13, ismn is 13 digits begining 979-0-... and uses the
 
same check digit calculations. See http://www.ismn-international.org/download/Web_ISMN_Users_Manual_2008-6.pdf
TODO: Does not currently need to support options.access, options.encode, auto-linking and COinS (as in external_link_id),
section 2, pages 9–12.
but may be needed in the future for :m:Interwiki_map custom-prefixes like :arxiv:, :bibcode:, :DOI:, :hdl:, :ISSN:,
:JSTOR:, :Openlibrary:, :PMID:, :RFC:.
 
]]
 
local function ismninternal_link_id (idoptions)
local id = mw.ustring.gsub (options.id, '%d', cfg.date_names.local_digits); -- translate 'local' digits to Western 0-9
local handler = cfg.id_handlers['ISMN'];
local text;
local valid_ismn = true;
local id_copy;
 
return table.concat (
id_copy = id; -- save a copy because this testing is destructive
{
id=id:gsub( "[%s-–]", "" ); -- strip spaces, hyphens, and endashes from the ismn
make_wikilink (link_label_make (options), options.label), -- wiki-link the identifier label
options.separator or '&nbsp;', -- add the separator
make_wikilink (
table.concat (
{
options.prefix,
id, -- translated to Western digits
options.suffix or ''
}),
substitute (cfg.presentation['bdi'], {'', mw.text.nowiki (options.id)}) -- bdi tags to prevent Latin script identifiers from being reversed at RTL language wikis
); -- nowiki because MediaWiki still has magic links for ISBN and the like; TODO: is it really required?
});
end
 
if 13 ~= id:len() or id:match( "^9790%d*$" ) == nil then -- ismn must be 13 digits and begin 9790
valid_ismn = false;
else
valid_ismn=is_valid_isxn_13 (id); -- validate ismn
end
 
--[[--------------------------< I S _ E M B A R G O E D >------------------------------------------------------
-- text = internal_link_id({link = handler.link, label = handler.label, -- use this (or external version) when there is some place to link to
-- prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode})
text="[[" .. handler.link .. "|" .. handler.label .. "]]" .. handler.separator .. id_copy; -- because no place to link to yet
 
Determines if a PMC identifier's online version is embargoed. Compares the date in |pmc-embargo-date= against
if false == valid_ismn then
today's date. If embargo date is in the future, returns the content of |pmc-embargo-date=; otherwise, returns
text = text .. ' ' .. set_error( 'bad_ismn' ) -- add an error message if the ismn is invalid
an empty string because the embargo has expired or because |pmc-embargo-date= was not set in this cite.
end
 
]]
 
local function is_embargoed (embargo)
if is_set (embargo) then
local lang = mw.getContentLanguage();
local good1, embargo_date, todays_date;
good1, embargo_date = pcall (lang.formatDate, lang, 'U', embargo);
todays_date = lang:formatDate ('U');
if good1 then -- if embargo date is a good date
return text;
if tonumber (embargo_date) >= tonumber (todays_date) then -- is embargo date is in the future?
return embargo; -- still embargoed
else
set_message ('maint_pmc_embargo'); -- embargo has expired; add main cat
return ''; -- unset because embargo has expired
end
end
end
return ''; -- |pmc-embargo-date= not set return empty string
end
 
 
--[=[--------------------------< I S S_ NV A L I D _ B I O R X I V _ D A T E >----------------------------------------------------------------------
 
Validate and format an issn. This code fixes the case where an editor has included an ISSN in the citation but
has separated the two groups of four digits with a space. When that condition occurred, the resulting link looked
like this:
 
returns true if:
|issn=0819 4327 gives: [http://www.worldcat.org/issn/0819 4327 0819 4327] -- can't have spaces in an external link
2019-12-11T00:00Z <= biorxiv_date < today + 2 days
The dated form of biorxiv identifier has a start date of 2019-12-11. The Unix timestamp for that date is {{#time:U|2019-12-11}} = 1576022400
This code now prevents that by inserting a hyphen at the issn midpoint. It also validates the issn for length
and makes sure that the checkdigit agrees with the calculated value. Incorrect length (8 digits), characters
other than 0-9 and X, or checkdigit / calculated value mismatch will all cause a check issn error message. The
issn is always displayed with a hyphen, even if the issn was given as a single group of 8 digits.
 
biorxiv_date is the date provided in those |biorxiv= parameter values that are dated at time 00:00:00 UTC
]]
today is the current date at time 00:00:00 UTC plus 48 hours
if today is 2015-01-01T00:00:00 then
adding 24 hours gives 2015-01-02T00:00:00 – one second more than today
adding 24 hours gives 2015-01-03T00:00:00 – one second more than tomorrow
 
This function does not work if it is fed month names for languages other than English. Wikimedia #time: parser
local function issn(id, e)
apparently doesn't understand non-English date month names. This function will always return false when the date
local issn_copy = id; -- save a copy of unadulterated issn; use this version for display if issn does not validate
contains a non-English month name because good1 is false after the call to lang_object.formatDate(). To get
local handler;
around that call this function with date parts and create a YYYY-MM-DD format date.
local text;
 
local valid_issn = true;
]=]
 
local function is_valid_biorxiv_date (y, m, d)
local biorxiv_date = table.concat ({y, m, d}, '-'); -- make ymd date
local good1, good2;
local biorxiv_ts, tomorrow_ts; -- to hold Unix timestamps representing the dates
local lang_object = mw.getContentLanguage();
 
good1, biorxiv_ts = pcall (lang_object.formatDate, lang_object, 'U', biorxiv_date); -- convert biorxiv_date value to Unix timestamp
good2, tomorrow_ts = pcall (lang_object.formatDate, lang_object, 'U', 'today + 2 days' ); -- today midnight + 2 days is one second more than all day tomorrow
if good1 and good2 then -- lang.formatDate() returns a timestamp in the local script which tonumber() may not understand
if e then
biorxiv_ts = tonumber (biorxiv_ts) or lang_object:parseFormattedNumber (biorxiv_ts); -- convert to numbers for the comparison;
handler = cfg.id_handlers['EISSN'];
tomorrow_ts = tonumber (tomorrow_ts) or lang_object:parseFormattedNumber (tomorrow_ts);
else
return false; -- one or both failed to convert to Unix timestamp
handler = cfg.id_handlers['ISSN'];
end
 
return ((1576022400 <= biorxiv_ts) and (biorxiv_ts < tomorrow_ts)) -- 2012-12-11T00:00Z <= biorxiv_date < tomorrow's date
id=id:gsub( "[%s-–]", "" ); -- strip spaces, hyphens, and endashes from the issn
end
 
if 8 ~= id:len() or nil == id:match( "^%d*X?$" ) then -- validate the issn: 8 digits long, containing only 0-9 or X in the last position
valid_issn=false; -- wrong length or improper character
else
valid_issn=is_valid_isxn(id, 8); -- validate issn
end
 
--[[--------------------------< IS _ V A L I D _ I S X N >-----------------------------------------------------
if true == valid_issn then
 
id = string.sub( id, 1, 4 ) .. "-" .. string.sub( id, 5 ); -- if valid, display correctly formatted version
ISBN-10 and ISSN validator code calculates checksum across all ISBN/ISSN digits including the check digit.
else
ISBN-13 is checked in isbn().
id = issn_copy; -- if not valid, use the show the invalid issn with error message
 
If the number is valid the result will be 0. Before calling this function, ISBN/ISSN must be checked for length
and stripped of dashes, spaces and other non-ISxN characters.
 
]]
 
local function is_valid_isxn (isxn_str, len)
local temp = 0;
isxn_str = { isxn_str:byte(1, len) }; -- make a table of byte values '0' → 0x30 .. '9' → 0x39, 'X' → 0x58
len = len + 1; -- adjust to be a loop counter
for i, v in ipairs (isxn_str) do -- loop through all of the bytes and calculate the checksum
if v == string.byte ("X" ) then -- if checkdigit is X (compares the byte value of 'X' which is 0x58)
temp = temp + 10 * (len - i); -- it represents 10 decimal
else
temp = temp + tonumber (string.char (v) )*(len-i);
end
end
return temp % 11 == 0; -- returns true if calculation result is zero
end
 
 
--[[--------------------------< IS _ V A L I D _ I S X N _ 1 3 >-----------------------------------------------
 
ISBN-13 and ISMN validator code calculates checksum across all 13 ISBN/ISMN digits including the check digit.
If the number is valid, the result will be 0. Before calling this function, ISBN-13/ISMN must be checked for length
and stripped of dashes, spaces and other non-ISxN-13 characters.
 
]]
 
local function is_valid_isxn_13 (isxn_str)
local temp=0;
isxn_str = { isxn_str:byte(1, 13) }; -- make a table of byte values '0' → 0x30 .. '9' → 0x39
text = external_link_id({link = handler.link, label = handler.label,
for i, v in ipairs (isxn_str) do
prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode})
temp = temp + (3 - 2*(i % 2)) * tonumber (string.char (v) ); -- multiply odd index digits by 1, even index digits by 3 and sum; includes check digit
end
if false == valid_issn then
return temp % 10 == 0; -- sum modulo 10 is zero when ISBN-13/ISMN is correct
text = text .. ' ' .. set_error( 'bad_issn', e and 'e' or '' ) -- add an error message if the issn is invalid
end
return text
end
 
 
--[[--------------------------< AN O R M A L I Z OE _ L C C N >------------------------------------------------------------------
 
LCCN normalization (https://www.loc.gov/marc/lccn-namespace.html#normalization)
1. Remove all blanks.
2. If there is a forward slash (/) in the string, remove it, and remove all characters to the right of the forward slash.
3. If there is a hyphen in the string:
a. Remove it.
b. Inspect the substring following (to the right of) the (removed) hyphen. Then (and assuming that steps 1 and 2 have been carried out):
1. All these characters should be digits, and there should be six or less. (not done in this function)
2. If the length of the substring is less than 6, left-fill the substring with zeroes until the length is six.
 
FormatsReturns a linknormalized LCCN for lccn() to Amazonvalidate. DoThere simpleis no error checking: asin(step must3.b.1) beperformed mixin ofthis 10 numeric or uppercase alphafunction.
characters. If a mix, first character must be uppercase alpha; if all numeric, asins must be 10-digit
isbn. If 10-digit isbn, add a maintenance category so a bot or awb script can replace |asin= with |isbn=.
Error message if not 10 characters, if not isbn10, if mixed and first character is a digit.
 
]]
 
local function amazon(id,normalize_lccn domain(lccn)
lccn = lccn:gsub ("%s", ""); -- 1. strip whitespace
local err_cat = ""
 
if nil ~= string.find (lccn, '/') then
if not id:match("^[%d%u][%d%u][%d%u][%d%u][%d%u][%d%u][%d%u][%d%u][%d%u][%d%u]$") then
err_catlccn = ' ' .. set_errorlccn:match ('bad_asin'"(.-)/"); -- asin2. isremove notforward aslash mixand ofall 10character uppercaseto alphathe andright numericof charactersit
else
if id:match("^%d%d%d%d%d%d%d%d%d[%dX]$") then -- if 10-digit numeric (or 9 digits with terminal X)
if check_isbn( id ) then -- see if asin value is isbn10
add_maint_cat ('ASIN');
elseif not is_set (err_cat) then
err_cat = ' ' .. set_error ('bad_asin'); -- asin is not isbn10
end
elseif not id:match("^%u[%d%u]+$") then
err_cat = ' ' .. set_error ('bad_asin'); -- asin doesn't begin with uppercase alpha
end
end
 
if not is_set(domain) then
local prefix
domain = "com";
local suffix
elseif in_array (domain, {'jp', 'uk'}) then -- Japan, United Kingdom
prefix, suffix = lccn:match ("(.+)%-(.+)"); -- 3.a remove hyphen by splitting the string into prefix and suffix
domain = "co." .. domain;
 
elseif in_array (domain, {'au', 'br', 'mx'}) then -- Australia, Brazil, Mexico
if nil ~= suffix then -- if there was a hyphen
domain = "com." .. domain;
suffix = string.rep("0", 6-string.len (suffix)) .. suffix; -- 3.b.2 left fill the suffix with 0s if suffix length less than 6
lccn = prefix..suffix; -- reassemble the LCCN
end
local handler = cfg.id_handlers['ASIN'];
return lccn;
return external_link_id({link=handler.link,
end
label=handler.label, prefix=handler.prefix .. domain .. "/dp/",
 
id=id, encode=handler.encode, separator = handler.separator}) .. err_cat;
end
 
--============================<< I D E N T I F I E R F U N C T I O N S >>====================================
 
--[[--------------------------< A R X I V >--------------------------------------------------------------------
 
See: httphttps://arxiv.org/help/arxiv_identifier
 
format and error check arXiv identifier. There are three valid forms of the identifier:
the first form, valid only between date codes 91089107 and 0703, is:
arXiv:<archive>.<class>/<date code><number><version>
where:
<archive> is a string of alpha characters - may be hyphenated; no other punctuation
<class> is a string of alpha characters - may be hyphenated; no other punctuation; not the same as |class= parameter which is not supported in this form
<date code> is four digits in the form YYMM where YY is the last two digits of the four-digit year and MM is the month number January = 01
first digit of YY for this form can only 9 and 0
Line 283 ⟶ 312:
<date code> and <version> are as defined for 0704-1412
<number> is a five-digit number
 
]]
 
local function arxiv (id, classoptions)
local handlerid = cfgoptions.id_handlers['ARXIV']id;
local class = options.Class; -- TODO: lowercase?
local handler = options.handler;
local year, month, version;
local err_msg = false; -- assume no error message
local err_cat = '';
local text; -- output text
if id:match("^%a[%a%.%-]+/[90]%d[01]%d%d%d%d$") or id:match("^%a[%a%.%-]+/[90]%d[01]%d%d%d%dv%d+$") then -- test for the 91089107-0703 format w/with &or w/owithout version
year, month = id:match("^%a[%a%.%-]+/([90]%d)([01]%d)%d%d%d[v%d]*$");
year = tonumber (year);
month = tonumber (month);
if ((not (90 < year or 8 > year)) or (1 > month or 12 < month)) or -- if invalid year or invalid month
((91 == year and 7 > month) or (7 == year and 3 < month)) then -- if years ok, are starting and ending months ok?
err_caterr_msg = ' ' .. set_error( 'bad_arxiv' )true; -- setflag for error message
end
 
elseif id:match("^%d%d[01]%d%.%d%d%d%d$") or id:match("^%d%d[01]%d%.%d%d%d%dv%d+$") then -- test for the 0704-1412 w/ & w/o version
elseif id:match("^%d%d[01]%d%.%d%d%d%d$") or id:match("^%d%d[01]%d%.%d%d%d%dv%d+$") then -- test for the 0704-1412 with or without version
year, month = id:match("^(%d%d)([01]%d)%.%d%d%d%d[v%d]*$");
year = tonumber (year);
month = tonumber (month);
if ((7 > year) or (14 < year) or (1 > month or 12 < month)) or -- is year invalid or is month invalid? (doesn't test for future years)
((7 == year) and (4 > month)) then --or -- when year is 07, is month invalid (before April)?
err_caterr_msg = ' ' .. set_error( 'bad_arxiv' )true; -- setflag for error message
end
 
elseif id:match("^%d%d[01]%d%.%d%d%d%d%d$") or id:match("^%d%d[01]%d%.%d%d%d%d%dv%d+$") then -- test for the 1501- format w/ & w/o version
elseif id:match("^%d%d[01]%d%.%d%d%d%d%d$") or id:match("^%d%d[01]%d%.%d%d%d%d%dv%d+$") then -- test for the 1501- format with or without version
year, month = id:match("^(%d%d)([01]%d)%.%d%d%d%d%d[v%d]*$");
year = tonumber (year);
month = tonumber (month);
if ((15 > year) or (1 > month or 12 < month)) then -- is year invalid or is month invalid? (doesn't test for future years)
err_caterr_msg = ' ' .. set_error( 'bad_arxiv' )true; -- setflag for error message
end
 
else
err_msg = true; -- not a recognized format; flag for error message
err_cat = ' ' .. set_error( 'bad_arxiv' ); -- arXiv id doesn't match any format
end
 
if err_msg then
text = external_link_id({link = handler.link, label = handler.label,
options.coins_list_t['ARXIV'] = nil; -- when error, unset so not included in COinS
prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode, access=handler.access}) .. err_cat;
end
local err_msg_t = {};
if err_msg then
set_message ('err_bad_arxiv');
end
 
text = external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode, access = handler.access});
 
if is_set (class) then
if id:match ('^%d+') then
class = ' [[' .. '//arxiv.org/archive/' .. class .. ' ' .. class .. ']]'; -- external link within square brackets, not wikilink
text = table.concat ({text, ' [[//arxiv.org/archive/', class, ' ', class, ']]'}); -- external link within square brackets, not wikilink
else
else
class = ''; -- empty string for concatenation
set_message ('err_class_ignored');
end
end
 
return text;
end
 
 
--[[--------------------------< B I B C O D E >--------------------------------------------------------------------
 
Validates (sort of) and formats a bibcode ID.
 
Format for bibcodes is specified here: https://adsabs.harvard.edu/abs_doc/help_pages/data.html#bibcodes
 
But, this: 2015arXiv151206696F is apparently valid so apparently, the only things that really matter are length, 19 characters
and first four digits must be a year. This function makes these tests:
length must be 19 characters
characters in position
1–4 must be digits and must represent a year in the range of 1000 – next year
5 must be a letter
6–8 must be letter, digit, ampersand, or dot (ampersand cannot directly precede a dot; &. )
9–18 must be letter, digit, or dot
19 must be a letter or dot
 
]]
 
local function bibcode (options)
local id = options.id;
local access = options.access;
local handler = options.handler;
local err_type;
local err_msg = '';
local year;
 
local text = external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode,
access = access});
if 19 ~= id:len() then
return text .. class;
err_type = cfg.err_msg_supl.length;
else
year = id:match ("^(%d%d%d%d)[%a][%w&%.][%w&%.][%w&%.][%w.]+[%a%.]$");
if not year then -- if nil then no pattern match
err_type = cfg.err_msg_supl.value; -- so value error
else
local next_year = tonumber (os.date ('%Y')) + 1; -- get the current year as a number and add one for next year
year = tonumber (year); -- convert year portion of bibcode to a number
if (1000 > year) or (year > next_year) then
err_type = cfg.err_msg_supl.year; -- year out of bounds
end
if id:find('&%.') then
err_type = cfg.err_msg_supl.journal; -- journal abbreviation must not have '&.' (if it does it's missing a letter)
end
end
end
 
if is_set (err_type) then -- if there was an error detected
set_message ('err_bad_bibcode', {err_type});
options.coins_list_t['BIBCODE'] = nil; -- when error, unset so not included in COinS
 
end
 
return text;
end
 
Line 333 ⟶ 437:
--[[--------------------------< B I O R X I V >-----------------------------------------------------------------
 
Format bioRxiv idID and do simple error checking. BiorXivBefore ids2019-12-11, arebiorXiv exactlyIDs 6were digits10.1101/ followed by exactly
6 digits. After 2019-12-11, biorXiv IDs retained the six-digit identifier but prefixed that with a yyyy.mm.dd.
The bioRxiv id is the number following the last slash in the bioRxiv-issued DOI:
date and suffixed with an optional version identifier.
https://doi.org/10.1101/078733 -> 078733
 
The bioRxiv ID is the string of characters:
https://doi.org/10.1101/078733 -> 10.1101/078733
or a date followed by a six-digit number followed by an optional version indicator 'v' and one or more digits:
https://www.biorxiv.org/content/10.1101/2019.12.11.123456v2 -> 10.1101/2019.12.11.123456v2
see https://www.biorxiv.org/about-biorxiv
 
]]
 
local function biorxiv (idoptions)
local handlerid = cfgoptions.id_handlers['BIORXIV']id;
local handler = options.handler;
local err_cat = ''; -- presume that bioRxiv id is valid
local err_msg = true; -- flag; assume that there will be an error
local patterns = {
if nil == id:match("^%d%d%d%d%d%d$") then -- if bioRxiv id has anything but six digits
'^10.1101/%d%d%d%d%d%d$', -- simple 6-digit identifier (before 2019-12-11)
err_cat = ' ' .. set_error( 'bad_biorxiv'); -- set an error message
'^10.1101/(20[1-9]%d)%.([01]%d)%.([0-3]%d)%.%d%d%d%d%d%dv%d+$', -- y.m.d. date + 6-digit identifier + version (after 2019-12-11)
end
'^10.1101/(20[1-9]%d)%.([01]%d)%.([0-3]%d)%.%d%d%d%d%d%d$', -- y.m.d. date + 6-digit identifier (after 2019-12-11)
}
for _, pattern in ipairs (patterns) do -- spin through the patterns looking for a match
if id:match (pattern) then
local y, m, d = id:match (pattern); -- found a match, attempt to get year, month and date from the identifier
 
if m then -- m is nil when id is the six-digit form
if not is_valid_biorxiv_date (y, m, d) then -- validate the encoded date; TODO: don't ignore leap-year and actual month lengths ({{#time:}} is a poor date validator)
break; -- date fail; break out early so we don't unset the error message
end
end
err_msg = nil; -- we found a match so unset the error message
break; -- and done
end
end -- err_cat remains set here when no match
 
if err_msg then
options.coins_list_t['BIORXIV'] = nil; -- when error, unset so not included in COinS
set_message ('err_bad_biorxiv'); -- and set the error message
end
return external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = id, separator = handler.separator,
encode = handler.encode, access = handler.access}) .. err_cat;
end
 
 
--[[--------------------------< N O R M A LC I ZT E _S LE CE CR NX >------------------------------------------------------------
 
CiteSeerX use their own notion of "doi" (not to be confused with the identifiers resolved via doi.org).
lccn normalization (http://www.loc.gov/marc/lccn-namespace.html#normalization)
 
1. Remove all blanks.
The description of the structure of this identifier can be found at Help_talk:Citation_Style_1/Archive_26#CiteSeerX_id_structure
2. If there is a forward slash (/) in the string, remove it, and remove all characters to the right of the forward slash.
3. If there is a hyphen in the string:
a. Remove it.
b. Inspect the substring following (to the right of) the (removed) hyphen. Then (and assuming that steps 1 and 2 have been carried out):
1. All these characters should be digits, and there should be six or less. (not done in this function)
2. If the length of the substring is less than 6, left-fill the substring with zeroes until the length is six.
 
Returns a normalized lccn for lccn() to validate. There is no error checking (step 3.b.1) performed in this function.
]]
 
local function normalize_lccnciteseerx (lccnoptions)
local id = options.id;
lccn = lccn:gsub ("%s", ""); -- 1. strip whitespace
local handler = options.handler;
local matched;
 
local text = external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
if nil ~= string.find (lccn,'/') then
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode,
lccn = lccn:match ("(.-)/"); -- 2. remove forward slash and all character to the right of it
access = handler.access});
matched = id:match ("^10%.1%.1%.[1-9]%d?%d?%d?%.[1-9]%d?%d?%d?$");
if not matched then
set_message ('err_bad_citeseerx' );
options.coins_list_t['CITESEERX'] = nil; -- when error, unset so not included in COinS
end
 
return text;
local prefix
end
local suffix
prefix, suffix = lccn:match ("(.+)%-(.+)"); -- 3.a remove hyphen by splitting the string into prefix and suffix
 
if nil ~= suffix then -- if there was a hyphen
suffix=string.rep("0", 6-string.len (suffix)) .. suffix; -- 3.b.2 left fill the suffix with 0s if suffix length less than 6
lccn=prefix..suffix; -- reassemble the lccn
end
return lccn;
end
 
--[[--------------------------< D O I >------------------------------------------------------------------------
 
Formats a DOI and checks for DOI errors.
--[[--------------------------< L C C N >----------------------------------------------------------------------
 
DOI names contain two parts: prefix and suffix separated by a forward slash.
Format LCCN link and do simple error checking. LCCN is a character string 8-12 characters long. The length of
Prefix: directory indicator '10.' followed by a registrant code
the LCCN dictates the character type of the first 1-3 characters; the rightmost eight are always digits.
Suffix: character string of any length chosen by the registrant
http://info-uri.info/registry/OAIHandler?verb=GetRecord&metadataPrefix=reg&identifier=info:lccn/
 
This function checks a DOI name for: prefix/suffix. If the DOI name contains spaces or endashes, or, if it ends
length = 8 then all digits
with a period or a comma, this function will emit a bad_doi error message.
length = 9 then lccn[1] is lower case alpha
 
length = 10 then lccn[1] and lccn[2] are both lower case alpha or both digits
DOI names are case-insensitive and can incorporate any printable Unicode characters so the test for spaces, endash,
length = 11 then lccn[1] is lower case alpha, lccn[2] and lccn[3] are both lower case alpha or both digits
and terminal punctuation may not be technically correct but it appears, that in practice these characters are rarely
length = 12 then lccn[1] and lccn[2] are both lower case alpha
if ever used in DOI names.
 
https://www.doi.org/doi_handbook/2_Numbering.html -- 2.2 Syntax of a DOI name
https://www.doi.org/doi_handbook/2_Numbering.html#2.2.2 -- 2.2.2 DOI prefix
 
]]
 
local function lccndoi (lccnoptions)
local handlerid = cfgoptions.id_handlers['LCCN']id;
local inactive = options.DoiBroken
local err_cat = ''; -- presume that LCCN is valid
local access = options.access;
local id = lccn; -- local copy of the lccn
local ignore_invalid = options.accept;
local handler = options.handler;
local err_flag;
 
local text;
id = normalize_lccn (id); -- get canonical form (no whitespace, hyphens, forward slashes)
if is_set (inactive) then
local len = id:len(); -- get the length of the lccn
local inactive_year = inactive:match("%d%d%d%d") or ''; -- try to get the year portion from the inactive date
local inactive_month, good;
 
if 8is_set == len(inactive_year) then
if id4 < inactive:matchlen("[^%d]") then -- ifinactive LCCNdate has anythingmore butthan digitsjust (nila ifyear only(could digitsbe anything)
local lang_obj = mw.getContentLanguage(); -- get a language object for this wiki
err_cat = ' ' .. set_error( 'bad_lccn' ); -- set an error message
good, inactive_month = pcall (lang_obj.formatDate, lang_obj, 'F', inactive); -- try to get the month name from the inactive date
end
if not good then
elseif 9 == len then -- LCCN should be adddddddd
inactive_month = nil; -- something went wrong so make sure this is unset
if nil == id:match("%l%d%d%d%d%d%d%d%d") then -- does it match our pattern?
end
err_cat = ' ' .. set_error( 'bad_lccn' ); -- set an error message
end
elseif 10 == len then -- LCCN should be aadddddddd or dddddddddd
if id:match("[^%d]") then -- if LCCN has anything but digits (nil if only digits) ...
if nil == id:match("^%l%l%d%d%d%d%d%d%d%d") then -- ... see if it matches our pattern
err_cat = ' ' .. set_error( 'bad_lccn' ); -- no match, set an error message
end
else
inactive_year = nil; -- |doi-broken-date= has something but it isn't a date
end
elseif 11 == len then -- LCCN should be aaadddddddd or adddddddddd
if is_set (inactive_year) and is_set (inactive_month) then
if not (id:match("^%l%l%l%d%d%d%d%d%d%d%d") or id:match("^%l%d%d%d%d%d%d%d%d%d%d")) then -- see if it matches one of our patterns
set_message ('maint_doi_inactive_dated', {inactive_year, inactive_month, ' '});
err_cat = ' ' .. set_error( 'bad_lccn' ); -- no match, set an error message
elseif is_set (inactive_year) then
set_message ('maint_doi_inactive_dated', {inactive_year, '', ''});
else
set_message ('maint_doi_inactive');
end
inactive = " (" .. cfg.messages['inactive'] .. ' ' .. inactive .. ')';
elseif 12 == len then -- LCCN should be aadddddddddd
end
if not id:match("^%l%l%d%d%d%d%d%d%d%d%d%d") then -- see if it matches our pattern
 
err_cat = ' ' .. set_error( 'bad_lccn' ); -- no match, set an error message
local registrant = mw.ustring.match (id, '^10%.([^/]+)/[^%s–]-[^%.,]$'); -- registrant set when DOI has the proper basic form
 
local registrant_err_patterns = { -- these patterns are for code ranges that are not supported
'^[^1-3]%d%d%d%d%.%d%d*$', -- 5 digits with subcode (0xxxx, 40000+); accepts: 10000–39999
'^[^1-5]%d%d%d%d$', -- 5 digits without subcode (0xxxx, 60000+); accepts: 10000–59999
'^[^1-9]%d%d%d%.%d%d*$', -- 4 digits with subcode (0xxx); accepts: 1000–9999
'^[^1-9]%d%d%d$', -- 4 digits without subcode (0xxx); accepts: 1000–9999
'^%d%d%d%d%d%d+', -- 6 or more digits
'^%d%d?%d?$', -- less than 4 digits without subcode (3 digits with subcode is legitimate)
'^%d%d?%.[%d%.]+', -- 1 or 2 digits with subcode
'^5555$', -- test registrant will never resolve
'[^%d%.]', -- any character that isn't a digit or a dot
}
 
if not ignore_invalid then
if registrant then -- when DOI has proper form
for i, pattern in ipairs (registrant_err_patterns) do -- spin through error patterns
if registrant:match (pattern) then -- to validate registrant codes
err_flag = set_message ('err_bad_doi'); -- when found, mark this DOI as bad
break; -- and done
end
end
else
err_flag = set_message ('err_bad_doi'); -- invalid directory or malformed
end
else
set_message ('maint_doi_ignore');
err_cat = ' ' .. set_error( 'bad_lccn' ); -- wrong length, set an error message
end
 
if err_flag then
if not is_set (err_cat) and nil ~= lccn:find ('%s') then
options.coins_list_t['DOI'] = nil; -- when error, unset so not included in COinS
err_cat = ' ' .. set_error( 'bad_lccn' ); -- lccn contains a space, set an error message
end
text = external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode, access = access,
auto_link = not (err_flag or is_set (inactive) or ignore_invalid) and 'doi' or nil -- do not auto-link when |doi-broken-date= has a value or when there is a DOI error or (to play it safe, after all, auto-linking is not essential) when invalid DOIs are ignored
}) .. (inactive or '');
 
return text;
return external_link_id({link = handler.link, label = handler.label,
prefix=handler.prefix,id=lccn,separator=handler.separator, encode=handler.encode}) .. err_cat;
end
 
 
--[[--------------------------< PH MD I DL >------------------------------------------------------------------------
 
Formats an HDL with minor error checking.
Format PMID and do simple error checking. PMIDs are sequential numbers beginning at 1 and counting up. This
 
code checks the PMID to see that it contains only digits and is less than test_limit; the value in local variable
HDL names contain two parts: prefix and suffix separated by a forward slash.
test_limit will need to be updated periodically as more PMIDs are issued.
Prefix: character string using any character in the UCS-2 character set except '/'
Suffix: character string of any length using any character in the UCS-2 character set chosen by the registrant
 
This function checks a HDL name for: prefix/suffix. If the HDL name contains spaces, endashes, or, if it ends
with a period or a comma, this function will emit a bad_hdl error message.
 
HDL names are case-insensitive and can incorporate any printable Unicode characters so the test for endashes and
terminal punctuation may not be technically correct but it appears, that in practice these characters are rarely
if ever used in HDLs.
 
Query string parameters are named here: https://www.handle.net/proxy_servlet.html. query strings are not displayed
but since '?' is an allowed character in an HDL, '?' followed by one of the query parameters is the only way we
have to detect the query string so that it isn't URL-encoded with the rest of the identifier.
 
]]
 
local function pmidhdl (idoptions)
local id = options.id;
local test_limit = 30000000; -- update this value as PMIDs approach
local handleraccess = cfgoptions.id_handlers['PMID']access;
local handler = options.handler;
local err_cat = ''; -- presume that PMID is valid
local query_params = { -- list of known query parameters from https://www.handle.net/proxy_servlet.html
'noredirect',
'ignore_aliases',
'auth',
'cert',
'index',
'type',
'urlappend',
'locatt',
'action',
}
iflocal hdl, suffix, param = id:match ('(.-)("[^%d]"?(%a+) then .+)$'); -- if PMID haslook anythingfor butquery digitsstring
local found;
err_cat = ' ' .. set_error( 'bad_pmid' ); -- set an error message
 
else -- PMID is only digits
if hdl then -- when there are query strings, this is the handle identifier portion
local id_num = tonumber(id); -- convert id to a number for range testing
for _, q in ipairs (query_params) do -- spin through the list of query parameters
if 1 > id_num or test_limit < id_num then -- if PMID is outside test limit boundaries
if param:match ('^' .. q) then -- if the query string begins with one of the parameters
err_cat = ' ' .. set_error( 'bad_pmid' ); -- set an error message
found = true; -- announce a find
break; -- and stop looking
end
end
end
 
if found then
return external_link_id({link = handler.link, label = handler.label,
id = hdl; -- found so replace id with the handle portion; this will be URL-encoded, suffix will not
prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode}) .. err_cat;
else
suffix = ''; -- make sure suffix is empty string for concatenation else
end
 
local text = external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = id, suffix = suffix, separator = handler.separator, encode = handler.encode, access = access})
 
if nil == id:match("^[^%s–]-/[^%s–]-[^%.,]$") then -- HDL must contain a forward slash, must not contain spaces, endashes, and must not end with period or comma
set_message ('err_bad_hdl' );
options.coins_list_t['HDL'] = nil; -- when error, unset so not included in COinS
end
 
return text;
end
 
 
--[[--------------------------< I S _ E M B A R G O E DN >----------------------------------------------------------------------
 
Determines whether an ISBN string is valid
Determines if a PMC identifier's online version is embargoed. Compares the date in |embargo= against today's date. If embargo date is
in the future, returns the content of |embargo=; otherwise, returns and empty string because the embargo has expired or because
|embargo= was not set in this cite.
 
]]
 
local function is_embargoedisbn (embargooptions)
local isbn_str = options.id;
if is_set (embargo) then
local langignore_invalid = mwoptions.getContentLanguage()accept;
local handler = options.handler;
local good1, embargo_date, good2, todays_date;
 
good1, embargo_date = pcall( lang.formatDate, lang, 'U', embargo );
local function return_result (check, err_type) -- local function to handle the various returns
good2, todays_date = pcall( lang.formatDate, lang, 'U' );
local ISBN = internal_link_id ({link = handler.link, label = handler.label, redirect = handler.redirect,
prefix = handler.prefix, id = isbn_str, separator = handler.separator});
if good1 and good2 then -- if embargo date and today's date are good dates
if ignore_invalid then -- if ignoring ISBN errors
if tonumber( embargo_date ) >= tonumber( todays_date ) then -- is embargo date is in the future?
set_message ('maint_isbn_ignore'); -- add a maint category even when there is no error
return embargo; -- still embargoed
else -- here when not ignoring
else
if not check then -- and there is an error
add_maint_cat ('embargo')
return options.coins_list_t['ISBN'] = nil; -- when error, unset becauseso not embargoincluded hasin expiredCOinS
set_message ('err_bad_isbn', err_type); -- set an error message
return ISBN; -- return id text
end
end
return ISBN; -- return id text
end
return ''; -- |embargo= not set return empty string
end
 
if nil ~= isbn_str:match ('[^%s-0-9X]') then
return return_result (false, cfg.err_msg_supl.char); -- fail if isbn_str contains anything but digits, hyphens, or the uppercase X
end
 
local id = isbn_str:gsub ('[%s-]', ''); -- remove hyphens and whitespace
--[[--------------------------< P M C >------------------------------------------------------------------------
 
local len = id:len();
Format a PMC, do simple error checking, and check for embargoed articles.
if len ~= 10 and len ~= 13 then
return return_result (false, cfg.err_msg_supl.length); -- fail if incorrect length
end
 
if len == 10 then
The embargo parameter takes a date for a value. If the embargo date is in the future the PMC identifier will not
if id:match ('^%d*X?$') == nil then -- fail if isbn_str has 'X' anywhere but last position
be linked to the article. If the embargo date is today or in the past, or if it is empty or omitted, then the
return return_result (false, cfg.err_msg_supl.form);
PMC identifier is linked to the article through the link at cfg.id_handlers['PMC'].prefix.
end
if not is_valid_isxn (id, 10) then -- test isbn-10 for numerical validity
return return_result (false, cfg.err_msg_supl.check); -- fail if isbn-10 is not numerically valid
end
if id:find ('^63[01]') then -- 630xxxxxxx and 631xxxxxxx are (apparently) not valid isbn group ids but are used by amazon as numeric identifiers (asin)
return return_result (false, cfg.err_msg_supl.group); -- fail if isbn-10 begins with 630/1
end
return return_result (true, cfg.err_msg_supl.check); -- pass if isbn-10 is numerically valid
else
if id:match ('^%d+$') == nil then
return return_result (false, cfg.err_msg_supl.char); -- fail if ISBN-13 is not all digits
end
if id:match ('^97[89]%d*$') == nil then
return return_result (false, cfg.err_msg_supl.prefix); -- fail when ISBN-13 does not begin with 978 or 979
end
if id:match ('^9790') then
return return_result (false, cfg.err_msg_supl.group); -- group identifier '0' is reserved to ISMN
end
return return_result (is_valid_isxn_13 (id), cfg.err_msg_supl.check);
end
end
 
PMC embargo date testing is done in function is_embargoed () which is called earlier because when the citation
has |pmc=<value> but does not have a |url= then |title= is linked with the PMC link. Function is_embargoed ()
returns the embargo date if the PMC article is still embargoed, otherwise it returns an empty string.
 
--[[--------------------------< A S I N >----------------------------------------------------------------------
PMCs are sequential numbers beginning at 1 and counting up. This code checks the PMC to see that it contains only digits and is less
 
than test_limit; the value in local variable test_limit will need to be updated periodically as more PMCs are issued.
Formats a link to Amazon. Do simple error checking: ASIN must be mix of 10 numeric or uppercase alpha
characters. If a mix, first character must be uppercase alpha; if all numeric, ASINs must be 10-digit
ISBN. If 10-digit ISBN, add a maintenance category so a bot or AWB script can replace |asin= with |isbn=.
Error message if not 10 characters, if not ISBN-10, if mixed and first character is a digit.
 
|asin=630....... and |asin=631....... are (apparently) not a legitimate ISBN though it checksums as one; these
do not cause this function to emit the maint_asin message
 
This function is positioned here because it calls isbn()
 
]]
 
local function pmc(id,asin embargo(options)
local id = options.id;
local test_limit = 6000000; -- update this value as PMCs approach
local handlerdomain = cfgoptions.id_handlers['PMC']ASINTLD;
local err_cat = ''; -- presume that PMC is valid
local id_num;
local text;
local err_flag;
id_num = id:match ('^[Pp][Mm][Cc](%d+)$'); -- identifier with pmc prefix
 
if not id:match("^[%d%u][%d%u][%d%u][%d%u][%d%u][%d%u][%d%u][%d%u][%d%u][%d%u]$") then
if is_set (id_num) then
err_flag = set_message ('err_bad_asin'); -- ASIN is not a mix of 10 uppercase alpha and numeric characters
add_maint_cat ('pmc_format');
else
else -- plain number without pmc prefix
id_num =if id:match ('"^%d+%d%d%d%d%d%d%d%d[%dX]$'"); then -- if here10-digit idnumeric is(or all9 digits with terminal X)
if is_valid_isxn (id, 10) then -- see if ASIN value is or validates as ISBN-10
if not id:find ('^63[01]') then -- 630xxxxxxx and 631xxxxxxx are (apparently) not a valid isbn prefixes but are used by amazon as a numeric identifier
err_flag = set_message ('err_bad_asin'); -- ASIN has ISBN-10 form but begins with something other than 630/1 so probably an isbn
end
elseif not is_set (err_flag) then
err_flag = set_message ('err_bad_asin'); -- ASIN is not ISBN-10
end
elseif not id:match("^%u[%d%u]+$") then
err_flag = set_message ('err_bad_asin'); -- asin doesn't begin with uppercase alpha
end
end
if (not is_set (domain)) or in_array (domain, {'us'}) then -- default: United States
domain = "com";
elseif in_array (domain, {'jp', 'uk'}) then -- Japan, United Kingdom
domain = "co." .. domain;
elseif in_array (domain, {'z.cn'}) then -- China
domain = "cn";
elseif in_array (domain, {'au', 'br', 'mx', 'sg', 'tr'}) then -- Australia, Brazil, Mexico, Singapore, Turkey
domain = "com." .. domain;
elseif not in_array (domain, {'ae', 'ca', 'cn', 'de', 'es', 'fr', 'in', 'it', 'nl', 'pl', 'sa', 'se', 'co.jp', 'co.uk', 'com', 'com.au', 'com.br', 'com.mx', 'com.sg', 'com.tr'}) then -- Arabic Emirates, Canada, China, Germany, Spain, France, Indonesia, Italy, Netherlands, Poland, Saudi Arabia, Sweden (as of 2021-03 Austria (.at), Liechtenstein (.li) and Switzerland (.ch) still redirect to the German site (.de) with special settings, so don't maintain local ASINs for them)
err_flag = set_message ('err_bad_asin_tld'); -- unsupported asin-tld value
end
local handler = options.handler;
 
if not is_set (id_numerr_flag) then -- id_num has a value so test it
options.coins_list_t['ASIN'] = handler.prefix .. domain .. "/dp/" .. id; -- asin for coins
id_num = tonumber(id_num); -- convert id_num to a number for range testing
else
if 1 > id_num or test_limit < id_num then -- if PMC is outside test limit boundaries
options.coins_list_t['ASIN'] = nil; -- when error, unset so not included in COinS
err_cat = ' ' .. set_error( 'bad_pmc' ); -- set an error message
else
id = tostring (id_num); -- make sure id is a string
end
else -- when id format incorrect
err_cat = ' ' .. set_error( 'bad_pmc' ); -- set an error message
end
return external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
if is_set (embargo) then -- is PMC is still embargoed?
prefix = handler.prefix .. domain .. "/dp/",
text="[[" .. handler.link .. "|" .. handler.label .. "]]" .. handler.separator .. id .. err_cat; -- still embargoed so no external link
id = id, encode = handler.encode, separator = handler.separator})
end
 
 
--[[--------------------------< I S M N >----------------------------------------------------------------------
 
Determines whether an ISMN string is valid. Similar to ISBN-13, ISMN is 13 digits beginning 979-0-... and uses the
same check digit calculations. See https://www.ismn-international.org/download/Web_ISMN_Users_Manual_2008-6.pdf
section 2, pages 9–12.
 
ismn value not made part of COinS metadata because we don't have a url or isn't a COinS-defined identifier (rft.xxx)
or an identifier registered at info-uri.info (info:)
 
]]
 
local function ismn (options)
local id = options.id;
local handler = options.handler;
local text;
local valid_ismn = true;
local id_copy;
 
id_copy = id; -- save a copy because this testing is destructive
id = id:gsub ('[%s-]', ''); -- remove hyphens and white space
 
if 13 ~= id:len() or id:match ("^9790%d*$" ) == nil then -- ISMN must be 13 digits and begin with 9790
valid_ismn = false;
else
valid_ismn=is_valid_isxn_13 (id); -- validate ISMN
text = external_link_id({link = handler.link, label = handler.label, -- no embargo date or embargo has expired, ok to link to article
prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode, access=handler.access}) .. err_cat;
end
return text;
end
 
-- text = internal_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect, -- use this (or external version) when there is some place to link to
-- prefix = handler.prefix, id = id_copy, separator = handler.separator, encode = handler.encode})
 
text = table.concat ( -- because no place to link to yet
--[[--------------------------< D O I >------------------------------------------------------------------------
{
make_wikilink (link_label_make (handler), handler.label),
handler.separator,
id_copy
});
 
if false == valid_ismn then
Formats a DOI and checks for DOI errors.
options.coins_list_t['ISMN'] = nil; -- when error, unset so not included in COinS; not really necessary here because ismn not made part of COinS
set_message ('err_bad_ismn'); -- create an error message if the ISMN is invalid
end
return text;
end
 
DOI names contain two parts: prefix and suffix separated by a forward slash.
Prefix: directory indicator '10.' followed by a registrant code
Suffix: character string of any length chosen by the registrant
 
--[[--------------------------< I S S N >----------------------------------------------------------------------
This function checks a DOI name for: prefix/suffix. If the doi name contains spaces or endashes, or, if it ends
with a period or a comma, this function will emit a bad_doi error message.
 
Validate and format an ISSN. This code fixes the case where an editor has included an ISSN in the citation but
DOI names are case-insensitive and can incorporate any printable Unicode characters so the test for spaces, endash,
has separated the two groups of four digits with a space. When that condition occurred, the resulting link looked
and terminal punctuation may not be technically correct but it appears, that in practice these characters are rarely
like this:
if ever used in doi names.
 
|issn=0819 4327 gives: [https://www.worldcat.org/issn/0819 4327 0819 4327] -- can't have spaces in an external link
This code now prevents that by inserting a hyphen at the ISSN midpoint. It also validates the ISSN for length
and makes sure that the checkdigit agrees with the calculated value. Incorrect length (8 digits), characters
other than 0-9 and X, or checkdigit / calculated value mismatch will all cause a check ISSN error message. The
ISSN is always displayed with a hyphen, even if the ISSN was given as a single group of 8 digits.
 
]]
 
local function doiissn (id, inactive, accessoptions)
local catid = ""options.id;
local handler = cfgoptions.id_handlers['DOI']handler;
local ignore_invalid = options.accept;
 
local issn_copy = id; -- save a copy of unadulterated ISSN; use this version for display if ISSN does not validate
local text;
local valid_issn = true;
if is_set(inactive) then
 
local inactive_year = inactive:match("%d%d%d%d") or ''; -- try to get the year portion from the inactive date
id = id:gsub ('[%s-]', ''); -- remove hyphens and whitespace
text = "[[" .. handler.link .. "|" .. handler.label .. "]]:" .. id;
 
if is_set(inactive_year) then
if 8 ~= id:len() or nil == id:match ("^%d*X?$" ) then -- validate the ISSN: 8 digits long, containing only 0-9 or X in the last position
table.insert( z.error_categories, "Pages with DOIs inactive since " .. inactive_year );
valid_issn = false; -- wrong length or improper character
else
else
table.insert( z.error_categories, "Pages with inactive DOIs" ); -- when inactive doesn't contain a recognizable year
valid_issn = is_valid_isxn (id, 8); -- validate ISSN
end
inactive = " (" .. cfg.messages['inactive'] .. " " .. inactive .. ")"
else
text = external_link_id({link = handler.link, label = handler.label,
prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode, access=access})
inactive = ""
end
 
if true == valid_issn then
if nil == id:match("^10%.[^%s–]-/[^%s–]-[^%.,]$") then -- doi must begin with '10.', must contain a fwd slash, must not contain spaces or endashes, and must not end with period or comma
id = string.sub (id, 1, 4 ) .. "-" .. string.sub (id, 5 ); -- if valid, display correctly formatted version
cat = ' ' .. set_error( 'bad_doi' );
else
id = issn_copy; -- if not valid, show the invalid ISSN with error message
end
 
return text .. inactive .. cat
text = external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode})
 
if ignore_invalid then
set_message ('maint_issn_ignore');
else
if false == valid_issn then
options.coins_list_t['ISSN'] = nil; -- when error, unset so not included in COinS
set_message ('err_bad_issn', (options.hkey == 'EISSN') and 'e' or ''); -- create an error message if the ISSN is invalid
end
end
return text;
end
 
 
--[[--------------------------< HJ DF LM >------------------------------------------------------------------------
 
A numerical identifier in the form nn.nnnn.nn
Formats an HDL with minor error checking.
 
]]
HDL names contain two parts: prefix and suffix separated by a forward slash.
Prefix: character string using any character in the UCS-2 character set except '/'
Suffix: character string of any length using any character in the UCS-2 character set chosen by the registrant
 
local function jfm (options)
This function checks a HDL name for: prefix/suffix. If the HDL name contains spaces, endashes, or, if it ends
local id = options.id;
with a period or a comma, this function will emit a bad_hdl error message.
local handler = options.handler;
local id_num;
 
id_num = id:match ('^[Jj][Ff][Mm](.*)$'); -- identifier with jfm prefix; extract identifier
HDL names are case-insensitive and can incorporate any printable Unicode characters so the test for endashes and
terminal punctuation may not be technically correct but it appears, that in practice these characters are rarely
if ever used in HDLs.
 
if is_set (id_num) then
]]
set_message ('maint_jfm_format');
else -- plain number without JFM prefix
id_num = id; -- if here id does not have prefix
end
 
if id_num and id_num:match('^%d%d%.%d%d%d%d%.%d%d$') then
local function hdl(id, access)
id = id_num; -- jfm matches pattern
local handler = cfg.id_handlers['HDL'];
else
set_message ('err_bad_jfm' ); -- set an error message
options.coins_list_t['JFM'] = nil; -- when error, unset so not included in COinS
end
local text =return external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode, access=access});
end
 
 
if nil == id:match("^[^%s–]-/[^%s–]-[^%.,]$") then -- hdl must contain a fwd slash, must not contain spaces, endashes, and must not end with period or comma
--[[--------------------------< J S T O R >--------------------------------------------------------------------
text = text .. ' ' .. set_error( 'bad_hdl' );
 
Format a JSTOR with some error checking
 
]]
 
local function jstor (options)
local id = options.id;
local access = options.access;
local handler = options.handler;
 
if id:find ('[Jj][Ss][Tt][Oo][Rr]') or id:find ('^https?://') or id:find ('%s') then
set_message ('err_bad_jstor'); -- set an error message
options.coins_list_t['JSTOR'] = nil; -- when error, unset so not included in COinS
end
return text;
return external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode, access = access});
end
 
 
--[[--------------------------< OL PC EC N L I B R A R Y >----------------------------------------------------------------------
 
Format LCCN link and do simple error checking. LCCN is a character string 8-12 characters long. The length of
Formats an OpenLibrary link, and checks for associated errors.
the LCCN dictates the character type of the first 1-3 characters; the rightmost eight are always digits.
https://oclc-research.github.io/infoURI-Frozen/info-uri.info/info:lccn/reg.html
 
length = 8 then all digits
length = 9 then lccn[1] is lowercase alpha
length = 10 then lccn[1] and lccn[2] are both lowercase alpha or both digits
length = 11 then lccn[1] is lower case alpha, lccn[2] and lccn[3] are both lowercase alpha or both digits
length = 12 then lccn[1] and lccn[2] are both lowercase alpha
 
]]
 
local function openlibrary(id,lccn access(options)
local lccn = options.id;
local code = id:match("^%d+([AMW])$"); -- only digits followed by 'A', 'M', or 'W'
local handler = cfgoptions.id_handlers['OL']handler;
local err_flag; -- presume that LCCN is valid
local id = lccn; -- local copy of the LCCN
 
id = normalize_lccn (id); -- get canonical form (no whitespace, hyphens, forward slashes)
if ( code == "A" ) then
local len = id:len(); -- get the length of the LCCN
return external_link_id({link=handler.link, label=handler.label,
 
prefix=handler.prefix .. 'authors/OL',
if 8 == len then
id=id, separator=handler.separator, encode = handler.encode,
if id:match("[^%d]") then -- if LCCN has anything but digits (nil if only digits)
access = access})
err_flag = set_message ('err_bad_lccn'); -- set an error message
elseif ( code == "M" ) then
end
return external_link_id({link=handler.link, label=handler.label,
elseif 9 == len then -- LCCN should be adddddddd
prefix=handler.prefix .. 'books/OL',
if nil == id:match("%l%d%d%d%d%d%d%d%d") then -- does it match our pattern?
id=id, separator=handler.separator, encode = handler.encode,
err_flag = set_message ('err_bad_lccn'); -- set an error message
access = access})
end
elseif ( code == "W" ) then
elseif 10 == len then -- LCCN should be aadddddddd or dddddddddd
return external_link_id({link=handler.link, label=handler.label,
if id:match("[^%d]") then -- if LCCN has anything but digits (nil if only digits) ...
prefix=handler.prefix .. 'works/OL',
if nil == id:match("^%l%l%d%d%d%d%d%d%d%d") then -- ... see if it matches our pattern
id=id, separator=handler.separator, encode = handler.encode,
err_flag = set_message ('err_bad_lccn'); -- no match, set an error message
access = access})
end
end
elseif 11 == len then -- LCCN should be aaadddddddd or adddddddddd
if not (id:match("^%l%l%l%d%d%d%d%d%d%d%d") or id:match("^%l%d%d%d%d%d%d%d%d%d%d")) then -- see if it matches one of our patterns
err_flag = set_message ('err_bad_lccn'); -- no match, set an error message
end
elseif 12 == len then -- LCCN should be aadddddddddd
if not id:match("^%l%l%d%d%d%d%d%d%d%d%d%d") then -- see if it matches our pattern
err_flag = set_message ('err_bad_lccn'); -- no match, set an error message
end
else
err_flag = set_message ('err_bad_lccn'); -- wrong length, set an error message
return external_link_id({link=handler.link, label=handler.label,
prefix=handler.prefix .. 'OL',
id=id, separator=handler.separator, encode = handler.encode,
access = access}) .. ' ' .. set_error( 'bad_ol' );
end
 
if not is_set (err_flag) and nil ~= lccn:find ('%s') then
err_flag = set_message ('err_bad_lccn'); -- lccn contains a space, set an error message
end
 
if is_set (err_flag) then
options.coins_list_t['LCCN'] = nil; -- when error, unset so not included in COinS
end
 
return external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = lccn, separator = handler.separator, encode = handler.encode});
end
 
 
--[[--------------------------< M E S S A G E _ I DR >--------------------------------------------------------------------------
 
A seven digit number; if not seven digits, zero-fill leading digits to make seven digits.
Validate and format a usenet message id. Simple error checking, looks for 'id-left@id-right' not enclosed in
'<' and/or '>' angle brackets.
 
]]
 
local function message_idmr (idoptions)
local handlerid = cfgoptions.id_handlers['USENETID']id;
local handler = options.handler;
local id_num;
local id_len;
 
id_num = id:match ('^[Mm][Rr](%d+)$'); -- identifier with mr prefix
local text = external_link_id({link = handler.link, label = handler.label,
 
prefix=handler.prefix,id=id,separator=handler.separator, encode=handler.encode})
if is_set (id_num) then
set_message ('maint_mr_format'); -- add maint cat
if not id:match('^.+@.+$') or not id:match('^[^<].*[^>]$')then -- doesn't have '@' or has one or first or last character is '< or '>'
else -- plain number without mr prefix
text = text .. ' ' .. set_error( 'bad_message_id' ) -- add an error message if the message id is invalid
id_num = id:match ('^%d+$'); -- if here id is all digits
end
end
 
id_len = id_num and id_num:len() or 0;
if (7 >= id_len) and (0 ~= id_len) then
id = string.rep ('0', 7-id_len) .. id_num; -- zero-fill leading digits
else
set_message ('err_bad_mr'); -- set an error message
options.coins_list_t['MR'] = nil; -- when error, unset so not included in COinS
end
return external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
return text
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode});
end
 
Line 683 ⟶ 1,050:
--[[--------------------------< O C L C >----------------------------------------------------------------------
 
Validate and format an oclcOCLC idID. https://www.oclc.org/batchload/controlnumber.en.html {{dead link}}
archived at: https://web.archive.org/web/20161228233804/https://www.oclc.org/batchload/controlnumber.en.html
 
]]
 
local function oclc (idoptions)
local handlerid = cfgoptions.id_handlers['OCLC']id;
local handler = options.handler;
local number;
 
local err_msg = ''; -- empty string for concatenation
if id:match('^ocm%d%d%d%d%d%d%d%d$') then -- ocm prefix and 8 digits; 001 field (12 characters)
number = id:match('ocm(%d+)'); -- get the number
Line 701 ⟶ 1,069:
number = id:match('%(OCoLC%)([1-9]%d*)'); -- get the number
if 9 < number:len() then
number = nil; -- contrainconstrain to 1 to 9 digits; change this when oclcOCLC issues 10-digit numbers
end
elseif id:match('^%d+$') then -- no prefix
number = id; -- get the number
if 10 < number:len() then
number = nil; -- contrainconstrain to 1 to 10 digits; change this when oclcOCLC issues 11-digit numbers
end
end
Line 713 ⟶ 1,081:
id = number; -- exclude prefix, if any, from external link
else
err_msgset_message = ' ' .. set_error( 'bad_oclcerr_bad_oclc' ) -- add an error message if the id is malformed
options.coins_list_t['OCLC'] = nil; -- when error, unset so not included in COinS
end
local text =return external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode}) .. err_msg;
 
return text;
end
 
 
--[[--------------------------< BO P E N L I B CR OA DR EY >--------------------------------------------------------------------
 
Formats an OpenLibrary link, and checks for associated errors.
Validates (sort of) and formats a bibcode id.
 
]]
Format for bibcodes is specified here: http://adsabs.harvard.edu/abs_doc/help_pages/data.html#bibcodes
 
local function openlibrary (options)
But, this: 2015arXiv151206696F is apparently valid so apparently, the only things that really matter are length, 19 characters
local id = options.id;
and first four digits must be a year. This function makes these tests:
local access = options.access;
length must be 19 characters
local handler = options.handler;
characters in position
local ident, code = id:gsub('^OL', ''):match("^(%d+([AMW]))$"); -- strip optional OL prefix followed immediately by digits followed by 'A', 'M', or 'W';
1–4 must be digits and must represent a year in the range of 1000 – next year
local err_flag;
5 must be a letter
local prefix = { -- these are appended to the handler.prefix according to code
6 must be letter, ampersand, or dot (ampersand cannot directly precede a dot; &. )
['A']='authors/OL',
7–8 must be letter, digit, ampersand, or dot (ampersand cannot directly precede a dot; &. )
['M']='books/OL',
9–18 must be letter, digit, or dot
['W']='works/OL',
19 must be a letter or dot
['X']='OL' -- not a code; spoof when 'code' in id is invalid
};
 
if not ident then
code = 'X'; -- no code or id completely invalid
ident = id; -- copy id to ident so that we display the flawed identifier
err_flag = set_message ('err_bad_ol');
end
 
if not is_set (err_flag) then
options.coins_list_t['OL'] = handler.prefix .. prefix[code] .. ident; -- experiment for ol coins
else
options.coins_list_t['OL'] = nil; -- when error, unset so not included in COinS
end
 
return external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix .. prefix[code],
id = ident, separator = handler.separator, encode = handler.encode,
access = access});
end
 
 
--[[--------------------------< O S T I >----------------------------------------------------------------------
 
Format OSTI and do simple error checking. OSTIs are sequential numbers beginning at 1 and counting up. This
code checks the OSTI to see that it contains only digits and is less than test_limit specified in the configuration;
the value in test_limit will need to be updated periodically as more OSTIs are issued.
 
NB. 1018 is the lowest OSTI number found in the wild (so far) and resolving OK on the OSTI site
 
]]
 
local function bibcodeosti (id, accessoptions)
local handlerid = cfgoptions.id_handlers['BIBCODE']id;
local err_typeaccess = options.access;
local yearhandler = options.handler;
 
if id:match("[^%d]") then -- if OSTI has anything but digits
local text = external_link_id({link=handler.link, label=handler.label,
set_message ('err_bad_osti'); -- set an error message
prefix=handler.prefix, id=id, separator=handler.separator, encode=handler.encode,
options.coins_list_t['OSTI'] = nil; -- when error, unset so not included in COinS
access=access});
else -- OSTI is only digits
local id_num = tonumber (id); -- convert id to a number for range testing
if 1018 > id_num or handler.id_limit < id_num then -- if OSTI is outside test limit boundaries
set_message ('err_bad_osti'); -- set an error message
options.coins_list_t['OSTI'] = nil; -- when error, unset so not included in COinS
end
end
return external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
if 19 ~= id:len() then
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode, access = access});
err_type = 'length';
end
else
 
year = id:match ("^(%d%d%d%d)[%a][%a&%.][%a&%.%d][%a&%.%d][%a%d%.]+[%a%.]$") --
 
if not year then -- if nil then no pattern match
--[[--------------------------< P M C >------------------------------------------------------------------------
err_type = 'value'; -- so value error
 
Format a PMC, do simple error checking, and check for embargoed articles.
 
The embargo parameter takes a date for a value. If the embargo date is in the future the PMC identifier will not
be linked to the article. If the embargo date is today or in the past, or if it is empty or omitted, then the
PMC identifier is linked to the article through the link at cfg.id_handlers['PMC'].prefix.
 
PMC embargo date testing is done in function is_embargoed () which is called earlier because when the citation
has |pmc=<value> but does not have a |url= then |title= is linked with the PMC link. Function is_embargoed ()
returns the embargo date if the PMC article is still embargoed, otherwise it returns an empty string.
 
PMCs are sequential numbers beginning at 1 and counting up. This code checks the PMC to see that it contains only digits and is less
than test_limit; the value in local variable test_limit will need to be updated periodically as more PMCs are issued.
 
]]
 
local function pmc (options)
local id = options.id;
local embargo = options.Embargo; -- TODO: lowercase?
local handler = options.handler;
local err_flag;
local id_num;
local text;
 
id_num = id:match ('^[Pp][Mm][Cc](%d+)$'); -- identifier with PMC prefix
 
if is_set (id_num) then
set_message ('maint_pmc_format');
else -- plain number without PMC prefix
id_num = id:match ('^%d+$'); -- if here id is all digits
end
 
if is_set (id_num) then -- id_num has a value so test it
id_num = tonumber (id_num); -- convert id_num to a number for range testing
if 1 > id_num or handler.id_limit < id_num then -- if PMC is outside test limit boundaries
err_flag = set_message ('err_bad_pmc'); -- set an error message
else
id = tostring (id_num); -- make sure id is a string
local next_year = tonumber(os.date ('%Y'))+1; -- get the current year as a number and add one for next year
year = tonumber (year); -- convert year portion of bibcode to a number
if (1000 > year) or (year > next_year) then
err_type = 'year'; -- year out of bounds
end
if id:find('&%.') then
err_type = 'journal'; -- journal abbreviation must not have '&.' (if it does its missing a letter)
end
end
else -- when id format incorrect
err_flag = set_message ('err_bad_pmc'); -- set an error message
end
if is_set (embargo) and is_set (is_embargoed (embargo)) then -- is PMC is still embargoed?
text = table.concat ( -- still embargoed so no external link
{
make_wikilink (link_label_make (handler), handler.label),
handler.separator,
id,
});
else
text = external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect, -- no embargo date or embargo has expired, ok to link to article
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode, access = handler.access,
auto_link = not err_flag and 'pmc' or nil -- do not auto-link when PMC has error
});
end
 
if err_flag then
if is_set (err_type) then -- if there was an error detected
options.coins_list_t['PMC'] = nil; -- when error, unset so not included in COinS
text = text .. ' ' .. set_error( 'bad_bibcode', {err_type});
end
 
return text;
end
 
 
--[[--------------------------< CP M I T E S E E R XD >----------------------------------------------------------------------
 
Format PMID and do simple error checking. PMIDs are sequential numbers beginning at 1 and counting up. This
CiteSeerX use their own notion of "doi" (not to be confused with the identifiers resolved via doi.org).
code checks the PMID to see that it contains only digits and is less than test_limit; the value in local variable
test_limit will need to be updated periodically as more PMIDs are issued.
 
The description of the structure of this identifier can be found at Help_talk:Citation_Style_1/Archive_26#CiteSeerX_id_structure
]]
 
local function citeseerxpmid (idoptions)
local handlerid = cfgoptions.id_handlers['CITESEERX']id;
local matchedhandler = options.handler;
 
if id:match("[^%d]") then -- if PMID has anything but digits
set_message ('err_bad_pmid'); -- set an error message
options.coins_list_t['PMID'] = nil; -- when error, unset so not included in COinS
else -- PMID is only digits
local id_num = tonumber (id); -- convert id to a number for range testing
if 1 > id_num or handler.id_limit < id_num then -- if PMID is outside test limit boundaries
set_message ('err_bad_pmid'); -- set an error message
options.coins_list_t['PMID'] = nil; -- when error, unset so not included in COinS
end
end
local text =return external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode,});
end
access=handler.access});
 
 
--[[--------------------------< R F C >------------------------------------------------------------------------
 
Format RFC and do simple error checking. RFCs are sequential numbers beginning at 1 and counting up. This
code checks the RFC to see that it contains only digits and is less than test_limit specified in the configuration;
the value in test_limit will need to be updated periodically as more RFCs are issued.
 
An index of all RFCs is here: https://tools.ietf.org/rfc/
 
]]
 
local function rfc (options)
local id = options.id;
local handler = options.handler;
 
if id:match("[^%d]") then -- if RFC has anything but digits
set_message ('err_bad_rfc'); -- set an error message
options.coins_list_t['RFC'] = nil; -- when error, unset so not included in COinS
else -- RFC is only digits
local id_num = tonumber (id); -- convert id to a number for range testing
if 1 > id_num or handler.id_limit < id_num then -- if RFC is outside test limit boundaries
set_message ('err_bad_rfc'); -- set an error message
options.coins_list_t['RFC'] = nil; -- when error, unset so not included in COinS
end
end
return external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
matched = id:match ("^10%.1%.1%.[1-9]%d?%d?%d?%.[1-9]%d?%d?%d?$");
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode, access = handler.access});
if not matched then
end
text = text .. ' ' .. set_error( 'bad_citeseerx' );
 
 
--[[--------------------------< S 2 C I D >--------------------------------------------------------------------
 
Format an S2CID, do simple error checking
 
S2CIDs are sequential numbers beginning at 1 and counting up. This code checks the S2CID to see that it is only
digits and is less than test_limit; the value in local variable test_limit will need to be updated periodically
as more S2CIDs are issued.
 
]]
 
local function s2cid (options)
local id = options.id;
local access = options.access;
local handler = options.handler;
local id_num;
local text;
id_num = id:match ('^[1-9]%d*$'); -- id must be all digits; must not begin with 0; no open access flag
 
if is_set (id_num) then -- id_num has a value so test it
id_num = tonumber (id_num); -- convert id_num to a number for range testing
if handler.id_limit < id_num then -- if S2CID is outside test limit boundaries
set_message ('err_bad_s2cid'); -- set an error message
options.coins_list_t['S2CID'] = nil; -- when error, unset so not included in COinS
end
else -- when id format incorrect
set_message ('err_bad_s2cid'); -- set an error message
options.coins_list_t['S2CID'] = nil; -- when error, unset so not included in COinS
end
 
text = external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode, access = access});
 
return text;
end
 
 
--[[--------------------------< S B N >------------------------------------------------------------------------
 
9-digit form of ISBN-10; uses same check-digit validation when SBN is prefixed with an additional '0' to make 10 digits
 
sbn value not made part of COinS metadata because we don't have a url or isn't a COinS-defined identifier (rft.xxx)
or an identifier registered at info-uri.info (info:)
 
]]
 
local function sbn (options)
local id = options.id;
local ignore_invalid = options.accept;
local handler = options.handler;
local function return_result (check, err_type) -- local function to handle the various returns
local SBN = internal_link_id ({link = handler.link, label = handler.label, redirect = handler.redirect,
prefix = handler.prefix, id = id, separator = handler.separator});
if not ignore_invalid then -- if not ignoring SBN errors
if not check then
options.coins_list_t['SBN'] = nil; -- when error, unset so not included in COinS; not really necessary here because sbn not made part of COinS
set_message ('err_bad_sbn', {err_type}); -- display an error message
return SBN;
end
else
set_message ('maint_isbn_ignore'); -- add a maint category even when there is no error (ToDo: Possibly switch to separate message for SBNs only)
end
return SBN;
end
 
if id:match ('[^%s-0-9X]') then
return return_result (false, cfg.err_msg_supl.char); -- fail if SBN contains anything but digits, hyphens, or the uppercase X
end
 
local ident = id:gsub ('[%s-]', ''); -- remove hyphens and whitespace; they interfere with the rest of the tests
 
if 9 ~= ident:len() then
return return_result (false, cfg.err_msg_supl.length); -- fail if incorrect length
end
 
if ident:match ('^%d*X?$') == nil then
return return_result (false, cfg.err_msg_supl.form); -- fail if SBN has 'X' anywhere but last position
end
 
return return_result (is_valid_isxn ('0' .. ident, 10), cfg.err_msg_supl.check);
end
 
Line 801 ⟶ 1,368:
--[[--------------------------< S S R N >----------------------------------------------------------------------
 
Format an ssrnSSRN, do simple error checking
 
SSRNs are sequential numbers beginning at 100? and counting up. This code checks the ssrnSSRN to see that it is
only digits and is greater than 99 and less than test_limit; the value in local variable test_limit will need
to be updated periodically as more SSRNs are issued.
Line 809 ⟶ 1,376:
]]
 
local function ssrn (idoptions)
local id = options.id;
local test_limit = 3000000; -- update this value as SSRNs approach
local handler = cfgoptions.id_handlers['SSRN']handler;
local err_cat = ''; -- presume that SSRN is valid
local id_num;
local text;
Line 819 ⟶ 1,385:
 
if is_set (id_num) then -- id_num has a value so test it
id_num = tonumber (id_num); -- convert id_num to a number for range testing
if 100 > id_num or test_limithandler.id_limit < id_num then -- if SSRN is outside test limit boundaries
err_catset_message = ' ' .. set_error( 'bad_ssrnerr_bad_ssrn' ); -- set an error message
options.coins_list_t['SSRN'] = nil; -- when error, unset so not included in COinS
end
else -- when id format incorrect
err_catset_message = ' ' .. set_error( 'bad_ssrnerr_bad_ssrn' ); -- set an error message
options.coins_list_t['SSRN'] = nil; -- when error, unset so not included in COinS
end
text = external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode, access =handler options.access}) .. err_cat;
 
return text;
Line 834 ⟶ 1,402:
 
 
--[[--------------------------< B U IS LE DN _E I DT _ L I S TD >------------------------------------------------------------
 
Validate and format a usenet message id. Simple error checking, looks for 'id-left@id-right' not enclosed in
Takes a table of IDs created by extract_ids() and turns it into a table of formatted ID outputs.
'<' and/or '>' angle brackets.
 
inputs:
id_list – table of identifiers built by extract_ids()
options – table of various template parameter values used to modify some manually handled identifiers
 
]]
 
local function build_id_listusenet_id ( id_list, options )
local new_list, handlerid = {}options.id;
local handler = options.handler;
 
local text = external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
local function fallback(k) return { __index = function(t,i) return cfg.id_handlers[k][i] end } end;
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode})
if not id:match('^.+@.+$') or not id:match('^[^<].*[^>]$') then -- doesn't have '@' or has one or first or last character is '< or '>'
set_message ('err_bad_usenet_id') -- add an error message if the message id is invalid
options.coins_list_t['USENETID'] = nil; -- when error, unset so not included in COinS
end
return text;
for k, v in pairs( id_list ) do -- k is uc identifier name as index to cfg.id_handlers; e.g. cfg.id_handlers['ISBN'], v is a table
end
-- fallback to read-only cfg
handler = setmetatable( { ['id'] = v, ['access'] = options.IdAccessLevels[k] }, fallback(k) );
 
 
if handler.mode == 'external' then
--[[--------------------------< Z B L >-----------------------------------------------------------------------
table.insert( new_list, {handler.label, external_link_id( handler ) } );
 
elseif handler.mode == 'internal' then
A numerical identifier in the form nnnn.nnnnn - leading zeros in the first quartet optional
table.insert( new_list, {handler.label, internal_link_id( handler ) } );
 
elseif handler.mode ~= 'manual' then
format described here: http://emis.mi.sanu.ac.rs/ZMATH/zmath/en/help/search/
error( cfg.messages['unknown_ID_mode'] );
 
elseif k == 'BIBCODE' then
temporary format is apparently eight digits. Anything else is an error
table.insert( new_list, {handler.label, bibcode( v, handler.access ) } );
 
elseif k == 'BIORXIV' then
]]
table.insert( new_list, {handler.label, biorxiv( v ) } );
 
elseif k == 'CITESEERX' then
local function zbl (options)
table.insert( new_list, {handler.label, citeseerx( v ) } );
local id = options.id;
elseif k == 'DOI' then
table.insert( local new_list, {handler.label, doi( v,= options.DoiBroken, handler.access ) } );
 
elseif k == 'HDL' then
if id:match('^%d%d%d%d%d%d%d%d$') then -- is this identifier using temporary format?
table.insert( new_list, {handler.label, hdl( v, handler.access ) } );
set_message ('maint_zbl'); -- yes, add maint cat
elseif k == 'ARXIV' then
elseif not id:match('^%d?%d?%d?%d%.%d%d%d%d%d$') then -- not temporary, is it normal format?
table.insert( new_list, {handler.label, arxiv( v, options.Class ) } );
set_message ('err_bad_zbl'); -- no, set an error message
elseif k == 'ASIN' then
options.coins_list_t['ZBL'] = nil; -- when error, unset so not included in COinS
table.insert( new_list, {handler.label, amazon( v, options.ASINTLD ) } );
elseif k == 'LCCN' then
table.insert( new_list, {handler.label, lccn( v ) } );
elseif k == 'OL' or k == 'OLA' then
table.insert( new_list, {handler.label, openlibrary( v, handler.access ) } );
elseif k == 'PMC' then
table.insert( new_list, {handler.label, pmc( v, options.Embargo ) } );
elseif k == 'PMID' then
table.insert( new_list, {handler.label, pmid( v ) } );
elseif k == 'OCLC' then
table.insert( new_list, {handler.label, oclc( v ) } );
elseif k == 'SSRN' then
table.insert( new_list, {handler.label, ssrn( v ) } );
elseif k == 'ISMN' then
table.insert( new_list, {handler.label, ismn( v ) } );
elseif k == 'ISSN' then
table.insert( new_list, {handler.label, issn( v ) } );
elseif k == 'EISSN' then
table.insert( new_list, {handler.label, issn( v, true ) } ); -- true distinguishes eissn from issn
elseif k == 'ISBN' then
local ISBN = internal_link_id( handler );
local check;
local err_type = '';
check, err_type = check_isbn( v );
if not check then
if is_set(options.IgnoreISBN) then -- ISBN is invalid; if |ignore-isbn-error= set
add_maint_cat ('ignore_isbn_err'); -- ad a maint category
else
ISBN = ISBN .. set_error( 'bad_isbn', {err_type}, false, " ", "" ); -- else display an error message
end
elseif is_set(options.IgnoreISBN) then -- ISBN is OK; if |ignore-isbn-error= set
add_maint_cat ('ignore_isbn_err'); -- because |ignore-isbn-error= unnecessary
end
table.insert( new_list, {handler.label, ISBN } );
elseif k == 'USENETID' then
table.insert( new_list, {handler.label, message_id( v ) } );
else
error( cfg.messages['unknown_manual_ID'] );
end
end
return external_link_id ({link = handler.link, label = handler.label, q = handler.q, redirect = handler.redirect,
local function comp( a, b ) -- used in following table.sort()
prefix = handler.prefix, id = id, separator = handler.separator, encode = handler.encode});
return a[1] < b[1];
end
table.sort( new_list, comp );
for k, v in ipairs( new_list ) do
new_list[k] = v[2];
end
return new_list;
end
 
 
--============================<< I N T E R F A C E F U N C T I O N S >>==========================================
 
--[[--------------------------< E X T R A C T _ I D S >------------------------------------------------------------
Line 931 ⟶ 1,457:
Populates ID table from arguments using configuration settings. Loops through cfg.id_handlers and searches args for
any of the parameters listed in each cfg.id_handlers['...'].parameters. If found, adds the parameter and value to
the identifier list. Emits redundant error message isif more than one alias exists in args
 
]]
 
local function extract_ids ( args )
local id_list = {}; -- list of identifiers found in args
for k, v in pairs ( cfg.id_handlers ) do -- k is ucuppercase identifier name as index to cfg.id_handlers; e.g. cfg.id_handlers['ISBN'], v is a table
v = select_one( (args, v.parameters, 'redundant_parameterserr_redundant_parameters' ); -- v.parameters is a table of aliases for k; here we pick one from args if present
if is_set (v) then id_list[k] = v; end -- if found in args, add identifier to our list
end
return id_list;
Line 947 ⟶ 1,473:
--[[--------------------------< E X T R A C T _ I D _ A C C E S S _ L E V E L S >--------------------------------------
 
Fetches custom id access levels from arguments using configuration settings. Parameters which have a predefined access
Parameters which have a predefined access level (e.g. arxiv) do not use this function as they are directly rendered as free without using an additional parameter.
 
function as they are directly rendered as free without using an additional parameter.
returns a table of k/v pairs where k is same as the identifier's key in cfg.id_handlers and v is the assigned (valid) keyword
 
access-level values must match the case used in cfg.keywords_lists['id-access'] (lowercase unless there is some special reason for something else)
 
]]
 
local function extract_id_access_levels ( args, id_list )
local id_accesses_list = {};
for k, v in pairs ( cfg.id_handlers ) do
local access_param = v.custom_access; -- name of identifier's access-level parameter
if is_set (access_param) then
local k_lower = string.lower(k);
local access_level = args[access_param]; -- get the assigned value if there is one
if is_set(access_param) then
if is_set (access_level) then
local access_level = args[access_param];
if is_setnot in_array (access_level, cfg.keywords_lists['id-access']) then -- exact match required
set_message ('err_invalid_param_val', {access_param, access_level});
if not in_array (access_level:lower(), cfg.keywords['id-access']) then
access_level = nil; -- invalid so unset
table.insert( z.message_tail, { set_error( 'invalid_param_val', {access_param, access_level}, true ) } );
access_level = nil;
end
if not is_set(id_list[k]) then
table.insert( z.message_tail, { set_error( 'param_access_requires_param', {k_lower}, true ) } );
end
if not is_set (id_list[k]) then -- identifier access-level must have a matching identifier
if is_set(access_level) then
set_message ('err_param_access_requires_param', {k:lower()}); -- parameter name is uppercase in cfg.id_handlers (k); lowercase for error message
access_level = access_level:lower();
end
id_accesses_list[k] = cfg.keywords_xlate[access_level]; -- get translated keyword
end
end
end
return id_accesses_list;
end
 
 
--[[--------------------------< B U I L D _ I D _ L I S T >----------------------------------------------------
 
render the identifiers into a sorted sequence table
 
<ID_list_coins_t> is a table of k/v pairs where k is same as key in cfg.id_handlers and v is the assigned value
<options_t> is a table of various k/v option pairs provided in the call to new_build_id_list();
modified by this function and passed to all identifier rendering functions
<access_levels_t> is a table of k/v pairs where k is same as key in cfg.id_handlers and v is the assigned value (if valid)
 
returns a sequence table of sorted (by hkey - 'handler' key) rendered identifier strings
 
]]
 
local function build_id_list (ID_list_coins_t, options_t, access_levels_t)
local ID_list_t = {};
local accept;
local func_map = { --function map points to functions associated with hkey identifier
['ARXIV'] = arxiv,
['ASIN'] = asin,
['BIBCODE'] = bibcode,
['BIORXIV'] = biorxiv,
['CITESEERX'] = citeseerx,
['DOI'] = doi,
['EISSN'] = issn,
['HDL'] = hdl,
['ISBN'] = isbn,
['ISMN'] = ismn,
['ISSN'] = issn,
['JFM'] = jfm,
['JSTOR'] = jstor,
['LCCN'] = lccn,
['MR'] = mr,
['OCLC'] = oclc,
['OL'] = openlibrary,
['OSTI'] = osti,
['PMC'] = pmc,
['PMID'] = pmid,
['RFC'] = rfc,
['S2CID'] = s2cid,
['SBN'] = sbn,
['SSRN'] = ssrn,
['USENETID'] = usenet_id,
['ZBL'] = zbl,
}
 
for hkey, v in pairs (ID_list_coins_t) do
v, accept = has_accept_as_written (v); -- remove accept-as-written markup if present; accept is boolean true when markup removed; false else
-- every function gets the options table with value v and accept boolean
options_t.hkey = hkey; -- ~/Configuration handler key
options_t.id = v; -- add that identifier value to the options table
options_t.accept = accept; -- add the accept boolean flag
options_t.access = access_levels_t[hkey]; -- add the access level for those that have an |<identifier-access= parameter
options_t.handler = cfg.id_handlers[hkey];
options_t.coins_list_t = ID_list_coins_t; -- pointer to ID_list_coins_t; for |asin= and |ol=; also to keep erroneous values out of the citation's metadata
options_t.coins_list_t[hkey] = v; -- id value without accept-as-written markup for metadata
if options_t.handler.access and not in_array (options_t.handler.access, cfg.keywords_lists['id-access']) then
error (cfg.messages['unknown_ID_access'] .. options_t.handler.access); -- here when handler access key set to a value not listed in list of allowed id access keywords
end
 
if func_map[hkey] then
local id_text = func_map[hkey] (options_t); -- call the function to get identifier text and any error message
table.insert (ID_list_t, {hkey, id_text}); -- add identifier text to the output sequence table
else
error (cfg.messages['unknown_ID_key'] .. hkey); -- here when func_map doesn't have a function for hkey
end
end
 
local function comp (a, b) -- used by following table.sort()
return a[1]:lower() < b[1]:lower(); -- sort by hkey
end
 
table.sort (ID_list_t, comp); -- sequence table of tables sort
for k, v in ipairs (ID_list_t) do -- convert sequence table of tables to simple sequence table of strings
ID_list_t[k] = v[2]; -- v[2] is the identifier rendering from the call to the various functions in func_map{}
end
return ID_list_t;
end
 
 
--[[--------------------------< O P T I O N S _ C H E C K >----------------------------------------------------
 
check that certain option parameters have their associated identifier parameters with values
 
<ID_list_coins_t> is a table of k/v pairs where k is same as key in cfg.id_handlers and v is the assigned value
<ID_support_t> is a sequence table of tables created in citation0() where each subtable has four elements:
[1] is the support parameter's assigned value; empty string if not set
[2] is a text string same as key in cfg.id_handlers
[3] is cfg.error_conditions key used to create error message
[4] is original ID support parameter name used to create error message
returns nothing; on error emits an appropriate error message
 
]]
 
local function options_check (ID_list_coins_t, ID_support_t)
for _, v in ipairs (ID_support_t) do
if is_set (v[1]) and not ID_list_coins_t[v[2]] then -- when support parameter has a value but matching identifier parameter is missing or empty
set_message (v[3], (v[4])); -- emit the appropriate error message
end
end
end
 
 
--[[--------------------------< I D E N T I F I E R _ L I S T S _ G E T >--------------------------------------
 
Creates two identifier lists: a k/v table of identifiers and their values to be used locally and for use in the
COinS metadata, and a sequence table of the rendered identifier strings that will be included in the rendered
citation.
 
]]
 
local function identifier_lists_get (args_t, options_t, ID_support_t)
local ID_list_coins_t = extract_ids (args_t); -- get a table of identifiers and their values for use locally and for use in COinS
options_check (ID_list_coins_t, ID_support_t); -- ID support parameters must have matching identifier parameters
local ID_access_levels_t = extract_id_access_levels (args_t, ID_list_coins_t); -- get a table of identifier access levels
local ID_list_t = build_id_list (ID_list_coins_t, options_t, ID_access_levels_t); -- get a sequence table of rendered identifier strings
 
return ID_list_t, ID_list_coins_t; -- return the tables
end
 
Line 988 ⟶ 1,636:
cfg = cfg_table_ptr;
 
is_sethas_accept_as_written = utilities_page_ptr.is_sethas_accept_as_written; -- import functions from select Module:Citation/CS1/Utilities module
is_set = utilities_page_ptr.is_set;
in_array = utilities_page_ptr.in_array;
set_errorset_message = utilities_page_ptr.set_errorset_message;
select_one = utilities_page_ptr.select_one;
add_maint_cat = utilities_page_ptr.add_maint_cat;
substitute = utilities_page_ptr.substitute;
make_wikilink = utilities_page_ptr.make_wikilink;
 
z = utilities_page_ptr.z; -- table of tables in Module:Citation/CS1/Utilities
end
 
 
--[[--------------------------< E X P O R T E D F U N C T I O N S >------------------------------------------
]]
 
return {
auto_link_urls = auto_link_urls, -- table of identifier URLs to be used when auto-linking |title=
build_id_list = build_id_list,
extract_ids = extract_ids,
identifier_lists_get = identifier_lists_get, -- experiment to replace individual calls to build_id_list(), extract_ids, extract_id_access_levels
extract_id_access_levels = extract_id_access_levels,
is_embargoed = is_embargoed;
set_selected_modules = set_selected_modules;