Module:Citation/CS1/Date validation
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This module contains routines that support theCitation Style 1andCitation Style 2date formats for citations on Wikipedia. In particular, this module contains a suite of functions that validate date formats and content for the variety of date-holding parameters associated with cs1|2 citations.
These files comprise the module support for cs1|2 citation templates:
--[[--------------------------< F O R W A R D D E C L A R A T I O N S >--------------------------------------
]]
localadd_prop_cat,is_set,in_array,set_message,substitute,wrap_style;-- imported functions from selected Module:Citation/CS1/Utilities
localcfg;-- table of tables imported from selected Module:Citation/CS1/Configuration
--[[--------------------------< F I L E - S C O P E D E C L A R A T I O N S >--------------------------------
File-scope variables are declared here
]]
locallang_object=mw.getContentLanguage();-- used by is_valid_accessdate(), is_valid_year(), date_name_xlate(); TODO: move to ~/Configuration?
localyear_limit;-- used by is_valid_year()
--[=[-------------------------< I S _ V A L I D _ A C C E S S D A T E >----------------------------------------
returns true if:
Wikipedia start date <= accessdate < today + 2 days
Wikipedia start date is 2001-01-15T00:00:00 UTC which is 979516800 seconds after 1970-01-01T00:00:00 UTC (the start of Unix time)
accessdate is the date provided in |access-date= 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
apparently doesn't understand non-English date month names. This function will always return false when the date
contains a non-English month name because good1 is false after the call to lang.formatDate(). To get around that
call this function with YYYY-MM-DD format dates.
]=]
localfunctionis_valid_accessdate(accessdate)
localgood1,good2;
localaccess_ts,tomorrow_ts;-- to hold Unix time stamps representing the dates
good1,access_ts=pcall(lang_object.formatDate,lang_object,'U',accessdate);-- convert accessdate 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
ifgood1andgood2then-- lang.formatDate() returns a timestamp in the local script which which tonumber() may not understand
access_ts=tonumber(access_ts)orlang_object:parseFormattedNumber(access_ts);-- convert to numbers for the comparison;
tomorrow_ts=tonumber(tomorrow_ts)orlang_object:parseFormattedNumber(tomorrow_ts);
else
returnfalse;-- one or both failed to convert to Unix time stamp
end
if979516800<=access_tsandaccess_ts<tomorrow_tsthen-- Wikipedia start date <= accessdate < tomorrow's date
returntrue;
else
returnfalse;-- accessdate out of range
end
end
--[[--------------------------< G E T _ M O N T H _ N U M B E R >----------------------------------------------
returns a number according to the month in a date: 1 for January, etc. Capitalization and spelling must be correct.
If not a valid month, returns 0
]]
localfunctionget_month_number(month)
returncfg.date_names['local'].long[month]orcfg.date_names['local'].short[month]or-- look for local names first
cfg.date_names['en'].long[month]orcfg.date_names['en'].short[month]or-- failing that, look for English names
0;-- not a recognized month name
end
--[[--------------------------< G E T _ S E A S O N _ N U M B E R >--------------------------------------------
returns a number according to the sequence of seasons in a year: 21 for Spring, etc. Capitalization and spelling
must be correct. If not a valid season, returns 0.
21-24 = Spring, Summer, Autumn, Winter, independent of “Hemisphere”
returns 0 when <param> is not |date=
Season numbering is defined by Extended Date/Time Format (EDTF) specification (https://www.loc.gov/standards/datetime/)
which became part of ISO 8601 in 2019. See '§Sub-year groupings'. The standard defines various divisions using
numbers 21-41. cs1|2 only supports generic seasons. EDTF does support the distinction between north and south
hemisphere seasons but cs1|2 has no way to make that distinction.
These additional divisions not currently supported:
25-28 = Spring - Northern Hemisphere, Summer- Northern Hemisphere, Autumn - Northern Hemisphere, Winter - Northern Hemisphere
29-32 = Spring – Southern Hemisphere, Summer– Southern Hemisphere, Autumn – Southern Hemisphere, Winter - Southern Hemisphere
33-36 = Quarter 1, Quarter 2, Quarter 3, Quarter 4 (3 months each)
37-39 = Quadrimester 1, Quadrimester 2, Quadrimester 3 (4 months each)
40-41 = Semestral 1, Semestral-2 (6 months each)
]]
localfunctionget_season_number(season,param)
if'date'~=paramthen
return0;-- season dates only supported by |date=
end
returncfg.date_names['local'].season[season]or-- look for local names first
cfg.date_names['en'].season[season]or-- failing that, look for English names
0;-- not a recognized season name
end
--[[--------------------------< G E T _ Q U A R T E R _ N U M B E R >------------------------------------------
returns a number according to the sequence of quarters in a year: 33 for first quarter, etc. Capitalization and spelling
must be correct. If not a valid quarter, returns 0.
33-36 = Quarter 1, Quarter 2, Quarter 3, Quarter 4 (3 months each)
returns 0 when <param> is not |date=
Quarter numbering is defined by Extended Date/Time Format (EDTF) specification (https://www.loc.gov/standards/datetime/)
which became part of ISO 8601 in 2019. See '§Sub-year groupings'. The standard defines various divisions using
numbers 21-41. cs1|2 only supports generic seasons and quarters.
These additional divisions not currently supported:
37-39 = Quadrimester 1, Quadrimester 2, Quadrimester 3 (4 months each)
40-41 = Semestral 1, Semestral-2 (6 months each)
]]
localfunctionget_quarter_number(quarter,param)
if'date'~=paramthen
return0;-- quarter dates only supported by |date=
end
quarter=mw.ustring.gsub(quarter,' +',' ');-- special case replace multiple space chars with a single space char
returncfg.date_names['local'].quarter[quarter]or-- look for local names first
cfg.date_names['en'].quarter[quarter]or-- failing that, look for English names
0;-- not a recognized quarter name
end
--[[--------------------------< G E T _ P R O P E R _ N A M E _ N U M B E R >----------------------------------
returns a non-zero number if date contains a recognized proper-name. Capitalization and spelling must be correct.
returns 0 when <param> is not |date=
]]
localfunctionget_proper_name_number(name,param)
if'date'~=paramthen
return0;-- proper-name dates only supported by |date=
end
returncfg.date_names['local'].named[name]or-- look for local names dates first
cfg.date_names['en'].named[name]or-- failing that, look for English names
0;-- not a recognized named date
end
--[[--------------------------< G E T _ E L E M E N T _ N U M B E R <------------------------------------------
returns true if month or season or quarter or proper name is valid (properly spelled, capitalized, abbreviated)
]]
localfunctionget_element_number(element,param)
localnum;
localfuncs={get_month_number,get_season_number,get_quarter_number,get_proper_name_number};-- list of functions to execute in order
for_,funcinipairs(funcs)do-- spin through the function list
num=func(element,param);-- call the function and get the returned number
if0~=numthen-- non-zero when valid month season quarter
returnnum;-- return that number
end
end
returnnil;-- not valid
end
--[[--------------------------< I S _ V A L I D _ Y E A R >----------------------------------------------------
Function gets current year from the server and compares it to year from a citation parameter. Years more than one
year in the future are not acceptable.
Special case for |pmc-embargo-date=: years more than two years in the future are not acceptable
]]
localfunctionis_valid_year(year,param)
ifnotis_set(year_limit)then
year_limit=tonumber(os.date("%Y"))+1;-- global variable so we only have to fetch it once
end
year=tonumber(year)orlang_object:parseFormattedNumber(year);-- convert to number for the comparison
ifyearand(100>year)then-- years less than 100 not supported
returnfalse;
end
if'pmc-embargo-date'==paramthen-- special case for |pmc-embargo-date=
returnyearand(year<=tonumber(os.date("%Y"))+2)orfalse;-- years more than two years in the future are not accepted
end
returnyearand(year<=year_limit)orfalse;
end
--[[--------------------------< I S _ V A L I D _ D A T E >----------------------------------------------------
Returns true if day is less than or equal to the number of days in month and year is no farther into the future
than next year; else returns false.
Assumes Julian calendar prior to year 1582 and Gregorian calendar thereafter. Accounts for Julian calendar leap
years before 1582 and Gregorian leap years after 1582. Where the two calendars overlap (1582 to approximately
1923) dates are assumed to be Gregorian.
]]
localfunctionis_valid_date(year,month,day,param)
localdays_in_month={31,28,31,30,31,30,31,31,30,31,30,31};
localmonth_length;
ifnotis_valid_year(year,param)then-- no farther into the future than next year except |pmc-embargo-date= no more than two years in the future
returnfalse;
end
month=tonumber(month);-- required for YYYY-MM-DD dates
if(2==month)then-- if February
month_length=28;-- then 28 days unless
if1582>tonumber(year)then-- Julian calendar
if0==(year%4)then-- is a leap year?
month_length=29;-- if leap year then 29 days in February
end
else-- Gregorian calendar
if(0==(year%4)and(0~=(year%100)or0==(year%400)))then-- is a leap year?
month_length=29;-- if leap year then 29 days in February
end
end
else
month_length=days_in_month[month];
end
iftonumber(day)>month_lengththen
returnfalse;
end
returntrue;
end
--[[--------------------------< I S _ V A L I D _ M O N T H _ R A N G E _ S T Y L E >--------------------------
Months in a range are expected to have the same style: Jan–Mar or October–December but not February–Mar or Jul–August.
This function looks in cfg.date_names{} to see if both month names are listed in the long subtable or both are
listed in the short subtable. When both have the same style (both are listed in the same table), returns true; false else
]]
localfunctionis_valid_month_range_style(month1,month2)
if(cfg.date_names.en.long[month1]andcfg.date_names.en.long[month2])or-- are both English names listed in the long subtable?
(cfg.date_names.en.short[month1]andcfg.date_names.en.short[month2])or-- are both English names listed in the short subtable?
(cfg.date_names['local'].long[month1]andcfg.date_names['local'].long[month2])or-- are both local names listed in the long subtable?
(cfg.date_names['local'].short[month1]andcfg.date_names['local'].short[month2])then-- are both local names listed in the short subtable?
returntrue;
end
returnfalse;-- names are mixed
end
--[[--------------------------< I S _ V A L I D _ M O N T H _ S E A S O N _ R A N G E >------------------------
Check a pair of months or seasons to see if both are valid members of a month or season pair.
Month pairs are expected to be left to right, earliest to latest in time.
All season ranges are accepted as valid because there are publishers out there who have published a Summer–Spring YYYY issue, hence treat as ok
]]
localfunctionis_valid_month_season_range(range_start,range_end,param)
localrange_start_number=get_month_number(range_start);
localrange_end_number;
if0==range_start_numberthen-- is this a month range?
range_start_number=get_season_number(range_start,param);-- not a month; is it a season? get start season number
range_end_number=get_season_number(range_end,param);-- get end season number
if(0~=range_start_number)and(0~=range_end_number)and(range_start_number~=range_end_number)then
returntrue;-- any season pairing is accepted except when both are the same
end
returnfalse;-- range_start and/or range_end is not a season
end
-- here when range_start is a month
range_end_number=get_month_number(range_end);-- get end month number
ifrange_start_number<range_end_numberand-- range_start is a month; does range_start precede range_end?
is_valid_month_range_style(range_start,range_end)then-- do months have the same style?
returntrue;-- proper order and same style
end
returnfalse;-- range_start month number is greater than or equal to range end number; or range end isn't a month
end
--[[--------------------------< M A K E _ C O I N S _ D A T E >------------------------------------------------
This function receives a table of date parts for one or two dates and an empty table reference declared in
Module:Citation/CS1. The function is called only for |date= parameters and only if the |date=<value> is
determined to be a valid date format. The question of what to do with invalid date formats is not answered here.
The date parts in the input table are converted to an ISO 8601 conforming date string:
single whole dates: yyyy-mm-dd
month and year dates: yyyy-mm
year dates: yyyy
ranges: yyyy-mm-dd/yyyy-mm-dd
yyyy-mm/yyyy-mm
yyyy/yyyy
Dates in the Julian calendar are reduced to year or year/year so that we don't have to do calendar conversion from
Julian to Proleptic Gregorian.
The input table has:
year, year2 – always present; if before 1582, ignore months and days if present
month, month2 – 0 if not provided, 1-12 for months, 21-24 for seasons; 99 Christmas
day, day2 – 0 if not provided, 1-31 for days
the output table receives:
rftdate: an ISO 8601 formatted date
rftchron: a free-form version of the date, usually without year which is in rftdate (season ranges and proper-name dates)
rftssn: one of four season keywords: winter, spring, summer, fall (lowercase)
rftquarter: one of four values: 1, 2, 3, 4
]]
localfunctionmake_COinS_date(input,tCOinS_date)
localdate;-- one date or first date in a range
localdate2='';-- end of range date
input.year=tonumber(input.year)orlang_object:parseFormattedNumber(input.year);-- language-aware tonumber()
input.year2=tonumber(input.year2)orlang_object:parseFormattedNumber(input.year2);-- COinS dates are pseudo-ISO 8601 so convert to Arabic numerals
if((1582==input.year)and(10>tonumber(input.month)))or(1582>input.year)then-- if a Julian calendar date
tCOinS_date.rftdate=tostring(input.year);-- &rft.date gets year only
return;-- done
end
-- here for all forms of Gregorian dates
if20<tonumber(input.month)then-- if season, quarter, or proper-name date
date=input.year;-- &rft.date gets year only
if0~=input.year2andinput.year~=input.year2then-- if a range, only the second year portion when not the same as range start year
date=string.format('%.4d/%.4d',input.year,input.year2)-- assemble the date range
end
localseason={[24]='winter',[21]='spring',[22]='summer',[23]='fall',[33]='1',[34]='2',[35]='3',[36]='4',[98]='Easter',[99]='Christmas'};-- seasons lowercase, no autumn; proper-names use title case
if0==input.month2then-- single season, quarter, or proper-name date
if40<tonumber(input.month)then
tCOinS_date.rftchron=season[input.month];-- proper-name date; used in journal metadata only
elseif30<tonumber(input.month)then
tCOinS_date.rftquarter=season[input.month];-- quarter date; used in journal metadata only
else
tCOinS_date.rftssn=season[input.month];-- season date; used in journal metadata only
end
else-- season ranges are lumped into &rft.chron; &rft.ssn and &rft.quarter are left blank
ifinput.year~=input.year2then-- season year – season year range or season year–year
if0~=input.month2then
tCOinS_date.rftchron=string.format('%s %s – %s %s',season[input.month],input.year,season[input.month2],input.year2);-- used in journal metadata only
end
else-- season–season year range
tCOinS_date.rftchron=season[input.month]..'–'..season[input.month2];-- season–season year range; used in journal metadata only
end
end
tCOinS_date.rftdate=tostring(date);
return;-- done
end
-- here for gregorian calendar dates
if0~=input.daythen
date=string.format('%s-%.2d-%.2d',input.year,tonumber(input.month),tonumber(input.day));-- whole date
elseif0~=input.monththen
date=string.format('%s-%.2d',input.year,tonumber(input.month));-- year and month
else
date=string.format('%s',input.year);-- just year
end
if0~=input.year2then
if0~=input.day2then
date2=string.format('/%s-%.2d-%.2d',input.year2,tonumber(input.month2),tonumber(input.day2));-- whole date
elseif0~=input.month2then
date2=string.format('/%s-%.2d',input.year2,tonumber(input.month2));-- year and month
else
date2=string.format('/%s',input.year2);-- just year
end
end
tCOinS_date.rftdate=date..date2;-- date2 has the '/' separator
return;
end
--[[--------------------------< P A T T E R N S >--------------------------------------------------------------
this is the list of patterns for date formats that this module recognizes. Approximately the first half of these
patterns represent formats that might be reformatted into another format. Those that might be reformatted have
'indicator' letters that identify the content of the matching capture: 'd' (day), 'm' (month), 'a' (anchor year),
'y' (year); second day, month, year have a '2' suffix.
These patterns are used for both date validation and for reformatting. This table should not be moved to ~/Configuration
because changes to this table require changes to check_date() and to reformatter() and reformat_date()
]]
localpatterns={
-- year-initial numerical year-month-day
['ymd']={'^(%d%d%d%d)%-(%d%d)%-(%d%d)$','y','m','d'},
-- month-initial: month day, year
['Mdy']={'^(%D-) +([1-9]%d?), +((%d%d%d%d?)%a?)$','m','d','a','y'},
-- month-initial day range: month day–day, year; days are separated by endash
['Md-dy']={'^(%D-) +([1-9]%d?)[%-–]([1-9]%d?), +((%d%d%d%d)%a?)$','m','d','d2','a','y'},
-- day-initial: day month year
['dMy']={'^([1-9]%d?) +(%D-) +((%d%d%d%d?)%a?)$','d','m','a','y'},
-- year-initial: year month day; day: 1 or 2 two digits, leading zero allowed; not supported at en.wiki
-- ['yMd'] = {'^((%d%d%d%d?)%a?) +(%D-) +(%d%d?)$', 'a', 'y', 'm', 'd'},
-- day-range-initial: day–day month year; days are separated by endash
['d-dMy']={'^([1-9]%d?)[%-–]([1-9]%d?) +(%D-) +((%d%d%d%d)%a?)$','d','d2','m','a','y'},
-- day initial month-day-range: day month - day month year; uses spaced endash
['dM-dMy']={'^([1-9]%d?) +(%D-) +[%-–] +([1-9]%d?) +(%D-) +((%d%d%d%d)%a?)$','d','m','d2','m2','a','y'},
-- month initial month-day-range: month day – month day, year; uses spaced endash
['Md-Mdy']={'^(%D-) +([1-9]%d?) +[%-–] +(%D-) +([1-9]%d?), +((%d%d%d%d)%a?)$','m','d','m2','d2','a','y'},
-- day initial month-day-year-range: day month year - day month year; uses spaced endash
['dMy-dMy']={'^([1-9]%d?) +(%D-) +(%d%d%d%d) +[%-–] +([1-9]%d?) +(%D-) +((%d%d%d%d)%a?)$','d','m','y','d2','m2','a','y2'},
-- month initial month-day-year-range: month day, year – month day, year; uses spaced endash
['Mdy-Mdy']={'^(%D-) +([1-9]%d?), +(%d%d%d%d) +[%-–] +(%D-) +([1-9]%d?), +((%d%d%d%d)%a?)$','m','d','y','m2','d2','a','y2'},
-- these date formats cannot be converted, per se, but month name can be rendered short or long
-- month/season year - month/season year; separated by spaced endash
['My-My']={'^(%D-) +(%d%d%d%d) +[%-–] +(%D-) +((%d%d%d%d)%a?)$','m','y','m2','a','y2'},
-- month/season range year; months separated by endash
['M-My']={'^(%D-)[%-–](%D-) +((%d%d%d%d)%a?)$','m','m2','a','y'},
-- month/season year or proper-name year; quarter year when First Quarter YYYY etc.
['My']={'^([^%d–]-) +((%d%d%d%d)%a?)$','m','a','y'},-- this way because endash is a member of %D; %D- will match January–March 2019 when it shouldn't
-- these date formats cannot be converted
['Sy4-y2']={'^(%D-) +((%d%d)%d%d)[%-–]((%d%d)%a?)$'},-- special case Winter/Summer year-year (YYYY-YY); year separated with unspaced endash
['Sy-y']={'^(%D-) +(%d%d%d%d)[%-–]((%d%d%d%d)%a?)$'},-- special case Winter/Summer year-year; year separated with unspaced endash
['y-y']={'^(%d%d%d%d?)[%-–]((%d%d%d%d?)%a?)$'},-- year range: YYY-YYY or YYY-YYYY or YYYY–YYYY; separated by unspaced endash; 100-9999
['y4-y2']={'^((%d%d)%d%d)[%-–]((%d%d)%a?)$'},-- year range: YYYY–YY; separated by unspaced endash
['y']={'^((%d%d%d%d?)%a?)$'},-- year; here accept either YYY or YYYY
}
--[[--------------------------< I S _ V A L I D _ E M B A R G O _ D A T E >------------------------------------
returns true and date value if that value has proper dmy, mdy, ymd format.
returns false and 9999 (embargoed forever) when date value is not proper format; assumes that when |pmc-embargo-date= is
set, the editor intended to embargo a PMC but |pmc-embargo-date= does not hold a single date.
]]
localfunctionis_valid_embargo_date(v)
ifv:match(patterns['ymd'][1])or-- ymd
v:match(patterns['Mdy'][1])or-- dmy
v:match(patterns['dMy'][1])then-- mdy
returntrue,v;
end
returnfalse,'9999';-- if here not good date so return false and set embargo date to long time in future
end
--[[--------------------------< C H E C K _ D A T E >----------------------------------------------------------
Check date format to see that it is one of the formats approved by WP:DATESNO or WP:DATERANGE. Exception: only
allowed range separator is endash. Additionally, check the date to see that it is a real date: no 31 in 30-day
months; no 29 February when not a leap year. Months, both long-form and three character abbreviations, and seasons
must be spelled correctly. Future years beyond next year are not allowed.
If the date fails the format tests, this function returns false and does not return values for anchor_year and
COinS_date. When this happens, the date parameter is (DEBUG: not?) used in the COinS metadata and the CITEREF identifier gets
its year from the year parameter if present otherwise CITEREF does not get a date value.
Inputs:
date_string - date string from date-holding parameters (date, year, publication-date, access-date, pmc-embargo-date, archive-date, lay-date)
Returns:
false if date string is not a real date; else
true, anchor_year, COinS_date
anchor_year can be used in CITEREF anchors
COinS_date is ISO 8601 format date; see make_COInS_date()
]]
localfunctioncheck_date(date_string,param,tCOinS_date)
localyear;-- assume that year2, months, and days are not used;
localyear2=0;-- second year in a year range
localmonth=0;
localmonth2=0;-- second month in a month range
localday=0;
localday2=0;-- second day in a day range
localanchor_year;
localcoins_date;
ifdate_string:match(patterns['ymd'][1])then-- year-initial numerical year month day format
year,month,day=date_string:match(patterns['ymd'][1]);
if12<tonumber(month)or1>tonumber(month)or1582>tonumber(year)or0==tonumber(day)thenreturnfalse;end-- month or day number not valid or not Gregorian calendar
anchor_year=year;
elseifmw.ustring.match(date_string,patterns['Mdy'][1])then-- month-initial: month day, year
month,day,anchor_year,year=mw.ustring.match(date_string,patterns['Mdy'][1]);
month=get_month_number(month);
if0==monththenreturnfalse;end-- return false if month text isn't one of the twelve months
elseifmw.ustring.match(date_string,patterns['Md-dy'][1])then-- month-initial day range: month day–day, year; days are separated by endash
month,day,day2,anchor_year,year=mw.ustring.match(date_string,patterns['Md-dy'][1]);
iftonumber(day)>=tonumber(day2)thenreturnfalse;end-- date range order is left to right: earlier to later; dates may not be the same;
month=get_month_number(month);
if0==monththenreturnfalse;end-- return false if month text isn't one of the twelve months
month2=month;-- for metadata
year2=year;
elseifmw.ustring.match(date_string,patterns['dMy'][1])then-- day-initial: day month year
day,month,anchor_year,year=mw.ustring.match(date_string,patterns['dMy'][1]);
month=get_month_number(month);
if0==monththenreturnfalse;end-- return false if month text isn't one of the twelve months
--[[ NOT supported at en.wiki
elseif mw.ustring.match(date_string, patterns['yMd'][1]) then -- year-initial: year month day; day: 1 or 2 two digits, leading zero allowed
anchor_year, year, month, day = mw.ustring.match(date_string, patterns['yMd'][1]);
month = get_month_number (month);
if 0 == month then return false; end -- return false if month text isn't one of the twelve months
-- end NOT supported at en.wiki ]]
elseifmw.ustring.match(date_string,patterns['d-dMy'][1])then-- day-range-initial: day–day month year; days are separated by endash
day,day2,month,anchor_year,year=mw.ustring.match(date_string,patterns['d-dMy'][1]);
iftonumber(day)>=tonumber(day2)thenreturnfalse;end-- date range order is left to right: earlier to later; dates may not be the same;
month=get_month_number(month);
if0==monththenreturnfalse;end-- return false if month text isn't one of the twelve months
month2=month;-- for metadata
year2=year;
elseifmw.ustring.match(date_string,patterns['dM-dMy'][1])then-- day initial month-day-range: day month - day month year; uses spaced endash
day,month,day2,month2,anchor_year,year=mw.ustring.match(date_string,patterns['dM-dMy'][1]);
if(notis_valid_month_season_range(month,month2))ornotis_valid_year(year)thenreturnfalse;end-- date range order is left to right: earlier to later;
month=get_month_number(month);-- for metadata
month2=get_month_number(month2);
year2=year;
elseifmw.ustring.match(date_string,patterns['Md-Mdy'][1])then-- month initial month-day-range: month day – month day, year; uses spaced endash
month,day,month2,day2,anchor_year,year=mw.ustring.match(date_string,patterns['Md-Mdy'][1]);
if(notis_valid_month_season_range(month,month2,param))ornotis_valid_year(year)thenreturnfalse;end
month=get_month_number(month);-- for metadata
month2=get_month_number(month2);
year2=year;
elseifmw.ustring.match(date_string,patterns['dMy-dMy'][1])then-- day initial month-day-year-range: day month year - day month year; uses spaced endash
day,month,year,day2,month2,anchor_year,year2=mw.ustring.match(date_string,patterns['dMy-dMy'][1]);
iftonumber(year2)<=tonumber(year)thenreturnfalse;end-- must be sequential years, left to right, earlier to later
ifnotis_valid_year(year2)ornotis_valid_month_range_style(month,month2)thenreturnfalse;end-- year2 no more than one year in the future; months same style
month=get_month_number(month);-- for metadata
month2=get_month_number(month2);
if0==monthor0==month2thenreturnfalse;end-- both must be valid
elseifmw.ustring.match(date_string,patterns['Mdy-Mdy'][1])then-- month initial month-day-year-range: month day, year – month day, year; uses spaced endash
month,day,year,month2,day2,anchor_year,year2=mw.ustring.match(date_string,patterns['Mdy-Mdy'][1]);
iftonumber(year2)<=tonumber(year)thenreturnfalse;end-- must be sequential years, left to right, earlier to later
ifnotis_valid_year(year2)ornotis_valid_month_range_style(month,month2)thenreturnfalse;end-- year2 no more than one year in the future; months same style
month=get_month_number(month);-- for metadata
month2=get_month_number(month2);
if0==monthor0==month2thenreturnfalse;end-- both must be valid
elseifmw.ustring.match(date_string,patterns['Sy4-y2'][1])then-- special case Winter/Summer year-year (YYYY-YY); year separated with unspaced endash
localcentury;
month,year,century,anchor_year,year2=mw.ustring.match(date_string,patterns['Sy4-y2'][1]);
if'Winter'~=monthand'Summer'~=monththenreturnfalseend;-- 'month' can only be Winter or Summer
anchor_year=year..'–'..anchor_year;-- assemble anchor_year from both years
year2=century..year2;-- add the century to year2 for comparisons
if1~=tonumber(year2)-tonumber(year)thenreturnfalse;end-- must be sequential years, left to right, earlier to later
ifnotis_valid_year(year2)thenreturnfalse;end-- no year farther in the future than next year
month=get_season_number(month,param);
elseifmw.ustring.match(date_string,patterns['Sy-y'][1])then-- special case Winter/Summer year-year; year separated with unspaced endash
month,year,anchor_year,year2=mw.ustring.match(date_string,patterns['Sy-y'][1]);
month=get_season_number(month,param);-- <month> can only be winter or summer; also for metadata
if(month~=cfg.date_names['en'].season['Winter'])and(month~=cfg.date_names['en'].season['Summer'])then
returnfalse;-- not Summer or Winter; abandon
end
anchor_year=year..'–'..anchor_year;-- assemble anchor_year from both years
if1~=tonumber(year2)-tonumber(year)thenreturnfalse;end-- must be sequential years, left to right, earlier to later
ifnotis_valid_year(year2)thenreturnfalse;end-- no year farther in the future than next year
elseifmw.ustring.match(date_string,patterns['My-My'][1])then-- month/season year - month/season year; separated by spaced endash
month,year,month2,anchor_year,year2=mw.ustring.match(date_string,patterns['My-My'][1]);
anchor_year=year..'–'..anchor_year;-- assemble anchor_year from both years
iftonumber(year)>=tonumber(year2)thenreturnfalse;end-- left to right, earlier to later, not the same
ifnotis_valid_year(year2)thenreturnfalse;end-- no year farther in the future than next year
if0~=get_month_number(month)and0~=get_month_number(month2)andis_valid_month_range_style(month,month2)then-- both must be month year, same month style
month=get_month_number(month);
month2=get_month_number(month2);
elseif0~=get_season_number(month,param)and0~=get_season_number(month2,param)then-- both must be season year, not mixed
month=get_season_number(month,param);
month2=get_season_number(month2,param);
else
returnfalse;
end
elseifmw.ustring.match(date_string,patterns['M-My'][1])then-- month/season range year; months separated by endash
month,month2,anchor_year,year=mw.ustring.match(date_string,patterns['M-My'][1]);
if(notis_valid_month_season_range(month,month2,param))or(notis_valid_year(year))thenreturnfalse;end
if0~=get_month_number(month)then-- determined to be a valid range so just check this one to know if month or season
month=get_month_number(month);
month2=get_month_number(month2);
if0==monthor0==month2thenreturnfalse;end
else
month=get_season_number(month,param);
month2=get_season_number(month2,param);
end
year2=year;
elseifmw.ustring.match(date_string,patterns['My'][1])then-- month/season/quarter/proper-name year
month,anchor_year,year=mw.ustring.match(date_string,patterns['My'][1]);
ifnotis_valid_year(year)thenreturnfalse;end
month=get_element_number(month,param);-- get month season quarter proper-name number or nil
ifnotmonththenreturnfalse;end-- not valid whatever it is
elseifmw.ustring.match(date_string,patterns['y-y'][1])then-- Year range: YYY-YYY or YYY-YYYY or YYYY–YYYY; separated by unspaced endash; 100-9999
year,anchor_year,year2=mw.ustring.match(date_string,patterns['y-y'][1]);
anchor_year=year..'–'..anchor_year;-- assemble anchor year from both years
iftonumber(year)>=tonumber(year2)thenreturnfalse;end-- left to right, earlier to later, not the same
ifnotis_valid_year(year2)thenreturnfalse;end-- no year farther in the future than next year
elseifmw.ustring.match(date_string,patterns['y4-y2'][1])then-- Year range: YYYY–YY; separated by unspaced endash
localcentury;
year,century,anchor_year,year2=mw.ustring.match(date_string,patterns['y4-y2'][1]);
anchor_year=year..'–'..anchor_year;-- assemble anchor year from both years
if13>tonumber(year2)thenreturnfalse;end-- don't allow 2003-05 which might be May 2003
year2=century..year2;-- add the century to year2 for comparisons
iftonumber(year)>=tonumber(year2)thenreturnfalse;end-- left to right, earlier to later, not the same
ifnotis_valid_year(year2)thenreturnfalse;end-- no year farther in the future than next year
ifin_array(param,{'date','publication-date','year'})then-- here when 'valid' abbreviated year range; if one of these parameters
add_prop_cat('year-range-abbreviated');-- add properties cat
end
elseifmw.ustring.match(date_string,patterns['y'][1])then-- year; here accept either YYY or YYYY
anchor_year,year=mw.ustring.match(date_string,patterns['y'][1]);
iffalse==is_valid_year(year)then
returnfalse;
end
else
returnfalse;-- date format not one of the MOS:DATE approved formats
end
ifparam~='date'then-- CITEREF disambiguation only allowed in |date=; |year= & |publication-date= promote to date
ifanchor_year:match('%l$')then
returnfalse;
end
end
if'access-date'==paramthen-- test access-date here because we have numerical date parts
if0~=yearand0~=monthand0~=dayand-- all parts of a single date required
0==year2and0==month2and0==day2then-- none of these; access-date must not be a range
ifnotis_valid_accessdate(year..'-'..month..'-'..day)then
returnfalse;-- return false when access-date out of bounds
end
else
returnfalse;-- return false when access-date is a range of two dates
end
end
if'archive-date'==paramthen-- test archive-date here because we have numerical date parts
ifnot(0~=yearand0~=monthand0~=dayand-- all parts of a single date required
0==year2and0==month2and0==day2)then-- none of these; archive-date must not be a range
returnfalse;-- return false when archive-date is a range of two dates
end
end
localresult=true;-- check whole dates for validity; assume true because not all dates will go through this test
if0~=yearand0~=monthand0~=dayand0==year2and0==month2and0==day2then-- YMD (simple whole date)
result=is_valid_date(year,month,day,param);-- <param> for |pmc-embargo-date=
elseif0~=yearand0~=monthand0~=dayand0==year2and0==month2and0~=day2then-- YMD-d (day range)
result=is_valid_date(year,month,day);
result=resultandis_valid_date(year,month,day2);
elseif0~=yearand0~=monthand0~=dayand0==year2and0~=month2and0~=day2then-- YMD-md (day month range)
result=is_valid_date(year,month,day);
result=resultandis_valid_date(year,month2,day2);
elseif0~=yearand0~=monthand0~=dayand0~=year2and0~=month2and0~=day2then-- YMD-ymd (day month year range)
result=is_valid_date(year,month,day);
result=resultandis_valid_date(year2,month2,day2);
end
iffalse==resultthenreturnfalse;end
ifnil~=tCOinS_datethen-- this table only passed into this function when testing |date= parameter values
make_COinS_date({year=year,month=month,day=day,year2=year2,month2=month2,day2=day2},tCOinS_date);-- make an ISO 8601 date string for COinS
end
returntrue,anchor_year;-- format is good and date string represents a real date
end
--[[--------------------------< D A T E S >--------------------------------------------------------------------
Cycle the date-holding parameters in passed table date_parameters_list through check_date() to check compliance with MOS:DATE. For all valid dates, check_date() returns
true. The |date= parameter test is unique, it is the only date holding parameter from which values for anchor_year (used in CITEREF identifiers) and COinS_date (used in
the COinS metadata) are derived. The |date= parameter is the only date-holding parameter that is allowed to contain the no-date keywords "n.d." or "nd" (without quotes).
Unlike most error messages created in this module, only one error message is created by this function. Because all of the date holding parameters are processed serially,
parameters with errors are added to the <error_list> sequence table as the dates are tested.
]]
localfunctiondates(date_parameters_list,tCOinS_date,error_list)
localanchor_year;-- will return as nil if the date being tested is not |date=
localCOinS_date;-- will return as nil if the date being tested is not |date=
localembargo_date;-- if embargo date is a good dmy, mdy, ymd date then holds original value else reset to 9999
localgood_date=false;
fork,vinpairs(date_parameters_list)do-- for each date-holding parameter in the list
ifis_set(v.val)then-- if the parameter has a value
v.val=mw.ustring.gsub(v.val,'%d',cfg.date_names.local_digits);-- translate 'local' digits to Western 0-9
ifv.val:match("^c%. [1-9]%d%d%d?%a?$")then-- special case for c. year or with or without CITEREF disambiguator - only |date= and |year=
localyear=v.val:match("c%. ([1-9]%d%d%d?)%a?");-- get the year portion so it can be tested
if'date'==kthen
anchor_year,COinS_date=v.val:match("((c%. [1-9]%d%d%d?)%a?)");-- anchor year and COinS_date only from |date= parameter
good_date=is_valid_year(year);
elseif'year'==kthen
good_date=is_valid_year(year);
end
elseif'date'==kthen-- if the parameter is |date=
ifv.val:match("^n%.d%.%a?$")then-- ToDo: I18N -- if |date=n.d. with or without a CITEREF disambiguator
good_date,anchor_year,COinS_date=true,v.val:match("((n%.d%.)%a?)");-- ToDo: I18N -- "n.d."; no error when date parameter is set to no date
elseifv.val:match("^nd%a?$")then-- ToDo: I18N -- if |date=nd with or without a CITEREF disambiguator
good_date,anchor_year,COinS_date=true,v.val:match("((nd)%a?)");-- ToDo: I18N -- "nd"; no error when date parameter is set to no date
else
good_date,anchor_year,COinS_date=check_date(v.val,k,tCOinS_date);-- go test the date
end
elseif'year'==kthen-- if the parameter is |year= it should hold only a year value
ifv.val:match("^[1-9]%d%d%d?%a?$")then-- if |year = 3 or 4 digits only with or without a CITEREF disambiguator
good_date,anchor_year,COinS_date=true,v.val:match("((%d+)%a?)");
end
elseif'pmc-embargo-date'==kthen-- if the parameter is |pmc-embargo-date=
good_date=check_date(v.val,k);-- go test the date
iftrue==good_datethen-- if the date is a valid date
good_date,embargo_date=is_valid_embargo_date(v.val);-- is |pmc-embargo-date= date a single dmy, mdy, or ymd formatted date? yes: returns embargo date; no: returns 9999
end
else-- any other date-holding parameter
good_date=check_date(v.val,k);-- go test the date
end
iffalse==good_datethen-- assemble one error message so we don't add the tracking category multiple times
table.insert(error_list,wrap_style('parameter',v.name));-- make parameter name suitable for error message list
end
end
end
returnanchor_year,embargo_date;-- and done
end
--[[--------------------------< Y E A R _ D A T E _ C H E C K >------------------------------------------------
Compare the value provided in |year= with the year value(s) provided in |date=. This function sets a local numeric value:
0 - year value does not match the year value in date
1 - (default) year value matches the year value in date or one of the year values when date contains two years
2 - year value matches the year value in date when date is in the form YYYY-MM-DD and year is disambiguated (|year=YYYYx)
the numeric value in <result> determines the 'output' if any from this function:
0 – adds error message to error_list sequence table
1 – adds maint cat
2 – does nothing
]]
localfunctionyear_date_check(year_string,year_origin,date_string,date_origin,error_list)
localyear;
localdate1;
localdate2;
localresult=1;-- result of the test; assume that the test passes
year=year_string:match('(%d%d%d%d?)');
ifdate_string:match('%d%d%d%d%-%d%d%-%d%d')andyear_string:match('%d%d%d%d%a')then--special case where both date and year are required YYYY-MM-DD and YYYYx
date1=date_string:match('(%d%d%d%d)');
year=year_string:match('(%d%d%d%d)');
ifyear~=date1then
result=0;-- years don't match
else
result=2;-- years match; but because disambiguated, don't add to maint cat
end
elseifdate_string:match("%d%d%d%d?.-%d%d%d%d?")then-- any of the standard range formats of date with two three- or four-digit years
date1,date2=date_string:match("(%d%d%d%d?).-(%d%d%d%d?)");
ifyear~=date1andyear~=date2then
result=0;
end
elseifmw.ustring.match(date_string,"%d%d%d%d[%-–]%d%d")then-- YYYY-YY date ranges
localcentury;
date1,century,date2=mw.ustring.match(date_string,"((%d%d)%d%d)[%-–]+(%d%d)");
date2=century..date2;-- convert YY to YYYY
ifyear~=date1andyear~=date2then
result=0;
end
elseifdate_string:match("%d%d%d%d?")then-- any of the standard formats of date with one year
date1=date_string:match("(%d%d%d%d?)");
ifyear~=date1then
result=0;
end
else-- should never get here; this function called only when no other date errors
result=0;-- no recognizable year in date
end
if0==resultthen-- year / date mismatch
table.insert(error_list,substitute(cfg.messages['mismatch'],{year_origin,date_origin}));-- add error message to error_list sequence table
elseif1==resultthen-- redundant year / date
set_message('maint_date_year');-- add a maint cat
end
end
--[[--------------------------< R E F O R M A T T E R >--------------------------------------------------------
reformat 'date' into new format specified by format_param if pattern_idx (the current format of 'date') can be
reformatted. Does the grunt work for reformat_dates().
The table re_formats maps pattern_idx (current format) and format_param (desired format) to a table that holds:
format string used by string.format()
identifier letters ('d', 'm', 'y', 'd2', 'm2', 'y2') that serve as indexes into a table t{} that holds captures
from mw.ustring.match() for the various date parts specified by patterns[pattern_idx][1]
Items in patterns{} have the general form:
['ymd'] = {'^(%d%d%d%d)%-(%d%d)%-(%d%d)$', 'y', 'm', 'd'}, where:
['ymd'] is pattern_idx
patterns['ymd'][1] is the match pattern with captures for mw.ustring.match()
patterns['ymd'][2] is an indicator letter identifying the content of the first capture
patterns['ymd'][3]... the second capture etc.
when a pattern matches a date, the captures are loaded into table t{} in capture order using the idemtifier
characters as indexes into t{} For the above, a ymd date is in t{} as:
t.y = first capture (year), t.m = second capture (month), t.d = third capture (day)
To reformat, this function is called with the pattern_idx that matches the current format of the date and with
format_param set to the desired format. This function loads table t{} as described and then calls string.format()
with the format string specified by re_format[pattern_idx][format_param][1] using values taken from t{} according
to the capture identifier letters specified by patterns[pattern_idx][format_param][n] where n is 2..
]]
localre_formats={
['ymd']={-- date format is ymd; reformat to:
['mdy']={'%s %s, %s','m','d','y'},-- |df=mdy
['dmy']={'%s %s %s','d','m','y'},-- |df=dmy
-- ['yMd'] = {'%s %s %s', 'y', 'm', 'd'}, -- |df=yMd; not supported at en.wiki
},
['Mdy']={-- date format is Mdy; reformat to:
['mdy']={'%s %s, %s','m','d','y'},-- for long/short reformatting
['dmy']={'%s %s %s','d','m','y'},-- |df=dmy
['ymd']={'%s-%s-%s','y','m','d'},-- |df=ymd
-- ['yMd'] = {'%s %s %s', 'y', 'm', 'd'}, -- |df=yMd; not supported at en.wiki
},
['dMy']={-- date format is dMy; reformat to:
['dmy']={'%s %s %s','d','m','y'},-- for long/short reformatting
['mdy']={'%s %s, %s','m','d','y'},-- |df=mdy
['ymd']={'%s-%s-%s','y','m','d'},-- |df=ymd
-- ['yMd'] = {'%s %s %s', 'y', 'm', 'd'}, -- |df=yMd; not supported at en.wiki
},
['Md-dy']={-- date format is Md-dy; reformat to:
['mdy']={'%s %s–%s, %s','m','d','d2','y'},-- for long/short reformatting
['dmy']={'%s–%s %s %s','d','d2','m','y'},-- |df=dmy -> d-dMy
},
['d-dMy']={-- date format is d-d>y; reformat to:
['dmy']={'%s–%s %s %s','d','d2','m','y'},-- for long/short reformatting
['mdy']={'%s %s–%s, %s','m','d','d2','y'},-- |df=mdy -> Md-dy
},
['dM-dMy']={-- date format is dM-dMy; reformat to:
['dmy']={'%s %s – %s %s %s','d','m','d2','m2','y'},-- for long/short reformatting
['mdy']={'%s %s – %s %s, %s','m','d','m2','d2','y'},-- |df=mdy -> Md-Mdy
},
['Md-Mdy']={-- date format is Md-Mdy; reformat to:
['mdy']={'%s %s – %s %s, %s','m','d','m2','d2','y'},-- for long/short reformatting
['dmy']={'%s %s – %s %s %s','d','m','d2','m2','y'},-- |df=dmy -> dM-dMy
},
['dMy-dMy']={-- date format is dMy-dMy; reformat to:
['dmy']={'%s %s %s – %s %s %s','d','m','y','d2','m2','y2'},-- for long/short reformatting
['mdy']={'%s %s, %s – %s %s, %s','m','d','y','m2','d2','y2'},-- |df=mdy -> Mdy-Mdy
},
['Mdy-Mdy']={-- date format is Mdy-Mdy; reformat to:
['mdy']={'%s %s, %s – %s %s, %s','m','d','y','m2','d2','y2'},-- for long/short reformatting
['dmy']={'%s %s %s – %s %s %s','d','m','y','d2','m2','y2'},-- |df=dmy -> dMy-dMy
},
['My-My']={-- these for long/short reformatting
['any']={'%s %s – %s %s','m','y','m2','y2'},-- dmy/mdy agnostic
},
['M-My']={-- these for long/short reformatting
['any']={'%s–%s %s','m','m2','y'},-- dmy/mdy agnostic
},
['My']={-- these for long/short reformatting
['any']={'%s %s','m','y'},-- dmy/mdy agnostic
},
-- ['yMd'] = { -- not supported at en.wiki
-- ['mdy'] = {'%s %s, %s', 'm', 'd', 'y'}, -- |df=mdy
-- ['dmy'] = {'%s %s %s', 'd', 'm', 'y'}, -- |df=dmy
-- ['ymd'] = {'%s-%s-%s', 'y', 'm', 'd'}, -- |df=ymd
-- },
}
localfunctionreformatter(date,pattern_idx,format_param,mon_len)
ifnotin_array(pattern_idx,{'ymd','Mdy','Md-dy','dMy','yMd','d-dMy','dM-dMy','Md-Mdy','dMy-dMy','Mdy-Mdy','My-My','M-My','My'})then
return;-- not in this set of date format patterns then not a reformattable date
end
if'ymd'==format_paramandin_array(pattern_idx,{'ymd','Md-dy','d-dMy','dM-dMy','Md-Mdy','dMy-dMy','Mdy-Mdy','My-My','M-My','My'})then
return;-- ymd date ranges not supported at en.wiki; no point in reformatting ymd to ymd
end
ifin_array(pattern_idx,{'My','M-My','My-My'})then-- these are not dmy/mdy so can't be 'reformatted' into either
format_param='any';-- so format-agnostic
end
-- yMd is not supported at en.wiki; when yMd is supported at your wiki, uncomment the next line
-- if 'yMd' == format_param and in_array (pattern_idx, {'yMd', 'Md-dy', 'd-dMy', 'dM-dMy', 'Md-Mdy', 'dMy-dMy', 'Mdy-Mdy'}) then -- these formats not convertable; yMd not supported at en.wiki
if'yMd'==format_paramthen-- yMd not supported at en.wiki; when yMd is supported at your wiki, remove or comment-out this line
return;-- not a reformattable date
end
localc1,c2,c3,c4,c5,c6,c7;-- these hold the captures specified in patterns[pattern_idx][1]
c1,c2,c3,c4,c5,c6,c7=mw.ustring.match(date,patterns[pattern_idx][1]);-- get the captures
localt={-- table that holds k/v pairs of date parts from the captures and patterns[pattern_idx][2..]
[patterns[pattern_idx][2]]=c1;-- at minimum there is always one capture with a matching indicator letter
[patterns[pattern_idx][3]or'x']=c2;-- patterns can have a variable number of captures; each capture requires an indicator letter;
[patterns[pattern_idx][4]or'x']=c3;-- where there is no capture, there is no indicator letter so n in patterns[pattern_idx][n] will be nil;
[patterns[pattern_idx][5]or'x']=c4;-- the 'x' here spoofs an indicator letter to prevent 'table index is nil' error
[patterns[pattern_idx][6]or'x']=c5;
[patterns[pattern_idx][7]or'x']=c6;
[patterns[pattern_idx][8]or'x']=c7;
};
ift.athen-- if this date has an anchor year capture (all convertable date formats except ymd)
ift.y2then-- for year range date formats
t.y2=t.a;-- use the anchor year capture when reassembling the date
else-- here for single date formats (except ymd)
t.y=t.a;-- use the anchor year capture when reassembling the date
end
end
iftonumber(t.m)then-- if raw month is a number (converting from ymd)
if's'==mon_lenthen-- if we are to use abbreviated month names
t.m=cfg.date_names['inv_local_short'][tonumber(t.m)];-- convert it to a month name
else
t.m=cfg.date_names['inv_local_long'][tonumber(t.m)];-- convert it to a month name
end
t.d=t.d:gsub('0(%d)','%1');-- strip leading '0' from day if present
elseif'ymd'==format_paramthen-- when converting to ymd
t.y=t.y:gsub('%a','');-- strip CITREF disambiguator if present; anchor year already known so process can proceed; TODO: maint message?
if1582>tonumber(t.y)then-- ymd format dates not allowed before 1582
return;
end
t.m=string.format('%02d',get_month_number(t.m));-- make sure that month and day are two digits
t.d=string.format('%02d',t.d);
elseifmon_lenthen-- if mon_len is set to either 'short' or 'long'
for_,moninipairs({'m','m2'})do-- because there can be two month names, check both
ift[mon]then
t[mon]=get_month_number(t[mon]);-- get the month number for this month (is length agnostic)
if0==t[mon]thenreturn;end-- seasons and named dates can't be converted
t[mon]=(('s'==mon_len)andcfg.date_names['inv_local_short'][t[mon]])orcfg.date_names['inv_local_long'][t[mon]];-- fetch month name according to length
end
end
end
localnew_date=string.format(re_formats[pattern_idx][format_param][1],-- format string
t[re_formats[pattern_idx][format_param][2]],-- named captures from t{}
t[re_formats[pattern_idx][format_param][3]],
t[re_formats[pattern_idx][format_param][4]],
t[re_formats[pattern_idx][format_param][5]],
t[re_formats[pattern_idx][format_param][6]],
t[re_formats[pattern_idx][format_param][7]],
t[re_formats[pattern_idx][format_param][8]]
);
returnnew_date;
end
--[[-------------------------< R E F O R M A T _ D A T E S >--------------------------------------------------
Reformats existing dates into the format specified by format.
format is one of several manual keywords: dmy, dmy-all, mdy, mdy-all, ymd, ymd-all. The -all version includes
access- and archive-dates; otherwise these dates are not reformatted.
This function allows automatic date formatting. In ~/Configuration, the article source is searched for one of
the {{use xxx dates}} templates. If found, xxx becomes the global date format as xxx-all. If |cs1-dates= in
{{use xxx dates}} has legitimate value then that value determines how cs1|2 dates will be rendered. Legitimate
values for |cs1-dates= are:
l - all dates are rendered with long month names
ls - publication dates use long month names; access-/archive-dates use abbreviated month names
ly - publication dates use long month names; access-/archive-dates rendered in ymd format
s - all dates are rendered with abbreviated (short) month names
sy - publication dates use abbreviated month names; access-/archive-dates rendered in ymd format
y - all dates are rendered in ymd format
the format argument for automatic date formatting will be the format specified by {{use xxx dates}} with the
value supplied by |cs1-dates so one of: xxx-l, xxx-ls, xxx-ly, xxx-s, xxx-sy, xxx-y, or simply xxx (|cs1-dates=
empty, omitted, or invalid) where xxx shall be either of dmy or mdy.
dates are extracted from date_parameters_list, reformatted (if appropriate), and then written back into the
list in the new format. Dates in date_parameters_list are presumed here to be valid (no errors). This function
returns true when a date has been reformatted, false else. Actual reformatting is done by reformatter().
]]
localfunctionreformat_dates(date_parameters_list,format)
localall=false;-- set to false to skip access- and archive-dates
locallen_p='l';-- default publication date length shall be long
locallen_a='l';-- default access-/archive-date length shall be long
localresult=false;
localnew_date;
ifformat:match('%a+%-all')then-- manual df keyword; auto df keyword when length not specified in {{use xxx dates}};
format=format:match('(%a+)%-all');-- extract the format
all=true;-- all dates are long format dates because this keyword doesn't specify length
elseifformat:match('%a+%-[lsy][sy]?')then-- auto df keywords; internal only
all=true;-- auto df applies to all dates; use length specified by capture len_p for all dates
format,len_p,len_a=format:match('(%a+)%-([lsy])([sy]?)');-- extract the format and length keywords
if'y'==len_pthen-- because allowed by MOS:DATEUNIFY (sort of) range dates and My dates not reformatted
format='ymd';-- override {{use xxx dates}}
elseif(notis_set(len_a))or(len_p==len_a)then-- no access-/archive-date length specified or same length as publication dates then
len_a=len_p;-- in case len_a not set
end
end-- else only publication dates and they are long
forparam_name,param_valinpairs(date_parameters_list)do-- for each date-holding parameter in the list
ifis_set(param_val.val)then-- if the parameter has a value
ifnot(notallandin_array(param_name,{'access-date','archive-date'}))then-- skip access- or archive-date unless format is xxx-all; yeah, ugly; TODO: find a better way
forpattern_idx,patterninpairs(patterns)do
ifmw.ustring.match(param_val.val,pattern[1])then
ifallandin_array(param_name,{'access-date','archive-date'})then-- if this date is an access- or archive-date
new_date=reformatter(param_val.val,pattern_idx,(('y'==len_a)and'ymd')orformat,len_a);-- choose ymd or dmy/mdy according to len_a setting
else-- all other dates
new_date=reformatter(param_val.val,pattern_idx,format,len_p);
end
ifnew_datethen-- set when date was reformatted
date_parameters_list[param_name].val=new_date;-- update date in date list
result=true;-- and announce that changes have been made
break;
end
end-- if
end-- for
end-- if
end-- if
end-- for
returnresult;-- declare boolean result and done
end
--[[--------------------------< D A T E _ H Y P H E N _ T O _ D A S H >----------------------------------------
Loops through the list of date-holding parameters and converts any hyphen to an ndash. Not called if the cs1|2
template has any date errors.
Modifies the date_parameters_list and returns true if hyphens are replaced, else returns false.
]]
localfunctiondate_hyphen_to_dash(date_parameters_list)
localresult=false;
localn;
forparam_name,param_valinpairs(date_parameters_list)do-- for each date-holding parameter in the list
ifis_set(param_val.val)and
notmw.ustring.match(param_val.val,patterns.ymd[1])then-- for those that are not ymd dates (ustring because here digits may not be Western)
param_val.val,n=param_val.val:gsub('%-','–');-- replace any hyphen with ndash
if0~=nthen
date_parameters_list[param_name].val=param_val.val;-- update the list
result=true;
end
end
end
returnresult;-- so we know if any hyphens were replaced
end
--[[-------------------------< D A T E _ N A M E _ X L A T E >------------------------------------------------
Attempts to translate English date names to local-language date names using names supplied by MediaWiki's
date parser function. This is simple name-for-name replacement and may not work for all languages.
if xlat_dig is true, this function will also translate Western (English) digits to the local language's digits.
This will also translate ymd dates.
]]
localfunctiondate_name_xlate(date_parameters_list,xlt_dig)
localxlate;
localmode;-- long or short month names
localmodified=false;
localdate;
localsources_t={
{cfg.date_names.en.long,cfg.date_names.inv_local_long},-- for translating long English month names to long local month names
{cfg.date_names.en.short,cfg.date_names.inv_local_short},-- short month names
{cfg.date_names.en.quarter,cfg.date_names.inv_local_quarter},-- quarter date names
{cfg.date_names.en.season,cfg.date_names.inv_local_season},-- season date nam
{cfg.date_names.en.named,cfg.date_names.inv_local_named},-- named dates
}
localfunctionis_xlateable(month)-- local function to get local date name that replaces existing English-language date name
for_,date_names_tinipairs(sources_t)do-- for each sequence table in date_names_t
ifdate_names_t[1][month]then-- if date name is English month (long or short), quarter, season or named and
ifdate_names_t[2][date_names_t[1][month]]then-- if there is a matching local date name
returndate_names_t[2][date_names_t[1][month]];-- return the local date name
end
end
end
end
forparam_name,param_valinpairs(date_parameters_list)do-- for each date-holding parameter in the list
ifis_set(param_val.val)then-- if the parameter has a value
date=param_val.val;
formonthinmw.ustring.gmatch(date,'[%a ]+')do-- iterate through all date names in the date (single date or date range)
month=mw.text.trim(month);-- this because quarterly dates contain whitespace
xlate=is_xlateable(month);-- get translate <month>; returns translation or nil
ifxlatethen
date=mw.ustring.gsub(date,month,xlate);-- replace the English with the translation
date_parameters_list[param_name].val=date;-- save the translated date
modified=true;
end
end
ifxlt_digthen-- shall we also translate digits?
date=date:gsub('%d',cfg.date_names.xlate_digits);-- translate digits from Western to 'local digits'
date_parameters_list[param_name].val=date;-- save the translated date
modified=true;
end
end
end
returnmodified;
end
--[[--------------------------< S E T _ S E L E C T E D _ M O D U L E S >--------------------------------------
Sets local imported functions table to same (live or sandbox) as that used by the other modules.
]]
localfunctionset_selected_modules(cfg_table_ptr,utilities_page_ptr)
add_prop_cat=utilities_page_ptr.add_prop_cat;-- import functions from selected Module:Citation/CS1/Utilities module
is_set=utilities_page_ptr.is_set;
in_array=utilities_page_ptr.in_array;
set_message=utilities_page_ptr.set_message;
substitute=utilities_page_ptr.substitute;
wrap_style=utilities_page_ptr.wrap_style;
cfg=cfg_table_ptr;-- import tables from selected Module:Citation/CS1/Configuration
end
--[[--------------------------< A R C H I V E _ D A T E _ C H E C K >------------------------------------------
Compare value in |archive-date= with the timestamp in Wayback machine urls. Emits an error message with suggested
date from the |archive-url= timestamp in an appropriate format when the value in |archive-date= does not match
the timestamp.
this function never called when any date in a cs1|2 template has errors
error message suggests new |archive-date= value in an appropriate format specified by <df>. <df> is either
|df= or cfg.global_df in that order. If <df> is nil, suggested date has format from |archive-date=. There is
a caveat: when |df=dmy or |df=mdy, the reformatter leaves |access-date= and |archive-date= formats as they are.
The error message suggested date is passed to the formatter as YYYY-MM-DD so when |df=dmy or |df=mdy, the format
is not changed.
]]
localfunctionarchive_date_check(archive_date,archive_url_timestamp,df)
localarchive_date_format='dmy-y';-- holds the date format of date in |archive-date; default to ymd; 'dmy' used here to spoof reformat_dates()
for_,v_tinipairs({{'dMy','dmy-all'},{'Mdy','mdy-all'}})do-- is |archive-date= format dmy or mdy?
ifarchive_date:match(patterns[v_t[1]][1])then-- does the pattern match?
archive_date_format=cfg.keywords_xlate[v_t[2]];-- get appropriate |df= supported keyword from the i18n translator table
break;
end
end
localdates_t={};
dates_t['archive-date']={val=archive_date,name=''};-- setup to call reformat_dates(); never called when errors so <name> unset as not needed
reformat_dates(dates_t,'dmy-y');-- reformat |archive-date= to ymd; 'dmy' used here to spoof reformat_dates()
localarchive_url_date=archive_url_timestamp:gsub('(%d%d%d%d)(%d%d)(%d%d)%d*','%1-%2-%3');-- make ymd format date from timestamp
ifdates_t['archive-date'].val==archive_url_datethen-- are the two dates the same
return;-- yes, done
else
dates_t['archive-date']={val=archive_url_date,name=''};-- setup to call reformat_dates() with the timestamp date
reformat_dates(dates_t,dforarchive_date_format);-- reformat timestamp to format specified by <df> or format used in |archive-date=
archive_url_date=dates_t['archive-date'].val;
set_message('err_archive_date_url_ts_mismatch',archive_url_date);-- emit an error message
end
end
--[[--------------------------< E X P O R T E D F U N C T I O N S >------------------------------------------
]]
return{-- return exported functions
archive_date_check=archive_date_check,
date_hyphen_to_dash=date_hyphen_to_dash,
date_name_xlate=date_name_xlate,
dates=dates,
reformat_dates=reformat_dates,
set_selected_modules=set_selected_modules,
year_date_check=year_date_check,
}