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Module:Citation/CS1/Date validation

3,230 bytes added, 13:22, 10 October 2020
sync from sandbox;
]]
local add_prop_cat, is_set, in_array, wrap_style; -- imported functions from selected Module:Citation/CS1/Utilities
local cfg; -- table of tables imported from selected Module:Citation/CS1/Configuration
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 |accessdateaccess-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
This function does not work if it is fed month names for languages other than English. Wikimedia #time: parser
apparently doesn't understand non-Engish 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.
local function is_valid_accessdate (accessdate)
local good1, good2;
local access_ts, tomorrow_ts; -- to hold unix Unix time stamps representing the dates
good1, access_ts = pcall (lang_object.formatDate, lang_object, 'U', accessdate ); -- convert accessdate value to unix timesatmp 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
tomorrow_ts = tonumber (tomorrow_ts) or lang_object:parseFormattedNumber (tomorrow_ts);
else
return false; -- one or both failed to convert to unix Unix time stamp
end
return false; -- 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
 
]]
 
local function get_month_number (month)
return cfg.date_names['local'].long[month] or cfg.date_names['local'].short[month] or -- look for local names first
cfg.date_names['en'].long[month] or cfg.date_names['en'].short[month] or -- failing that, look for English names
0; -- not a recognized month name
end
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= isset, the editor intended to embargo a pmc PMC but |pmc-embargo-date= does not hold a single date.
]]
end
return false, '9999'; -- if here not good date so return false and set embargo date to long time in future
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
 
]]
 
local function get_month_number (month)
return cfg.date_names['local'].long[month] or cfg.date_names['local'].short[month] or -- look for local names first
cfg.date_names['en'].long[month] or cfg.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: 1 21 for WinterSpring, 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=
Uses Season numbering is defined by Extended Date/Time Format (EDTF) specification (https://www.loc.gov/standards/datetime/)which became part of ISO DIS 8601 2016 part 2 §4in 2019.7 Divisions of a See '§Sub-year for hemishperegroupings'. The standard defines various divisions usingnumbers 21-independent 41. cs1|2 only supports generic seasons:. EDTF does support the distinction between north and south 21-24 = Spring, Summer, Autumn, Winter, independent of “Hemisphere”hemispere seasons but cs1|2 has no way to make that distinction.
These additional divisions not currently supported:
]]
local function get_season_number (season, param) if 'date' ~= param then return 0; -- season dates only supported by |date= end
return cfg.date_names['local'].season[season] or -- look for local names first
cfg.date_names['en'].season[season] or -- failing that, look for English names
--[[--------------------------< I S G E T _ P Q U A R O P T E R _ N A U M B E R >------------------------------------------ returns a number according to the sequence of quarters in a year: 33 for first quarter, etc. Capitalization and spellingmust 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 usingnumbers 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) ]] local function get_quarter_number (quarter, param) if 'date' ~= param then return 0; -- quarter dates only supported by |date= end quarter = mw.ustring.gsub (quarter, ' +', ' '); -- special case replace multiple space chars with a single space char return cfg.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 nameend  --[[--------------------------< 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=
]]
local function is_proper_name get_proper_name_number (name, param) if 'date' ~= param then return 0; -- proper-name dates only supported by |date= end
return cfg.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
--[[--------------------------< I S G E T _ V A E L I D _ E M O E N T H _ O N U M B E R _ S E A S O N ><------------------------------------------
--returns true if month or season or quarter or proper name is valid (properly spelled, capitalized, abbreviated)
]]
local function is_valid_month_or_season get_element_number (month_seasonelement, param) if 0 =local num; local funcs = {get_month_number , get_season_number, get_quarter_number, get_proper_name_number}; -- list of functions to execute in order for _, func in ipairs (month_seasonfuncs) then do -- if month text isn't one of spin through the twelve monthsfunction list num = func (element, might be a seasonparam); -- call the function and get the returned number if 0 ~== get_season_number (month_season) num then --non- not a zero when valid month, is it a season?quarter return falsenum; -- return false not a month or one of the five seasonsthat number
end
end
return truenil; -- 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.
]]
local function is_valid_year(year)
if not is_set(year_limit) then
year_limit = tonumber(os.date("%Y"))+1; -- global variable so we only have to fetch it once
--[[--------------------------< 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.
month = tonumber(month); -- required for YYYY-MM-DD dates
if (2==month) then -- if February
month_length = 28; -- then 28 days unless
if 1582 > tonumber(year) then -- Julian calendar
if 0==(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) or 0==(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
if len1 == len2 then
return true; -- both months are short form so return true
elseif 'May' == month1 or 'May'== month2 then-- ToDo: I18N
return true; -- both months are long form so return true
elseif 3 == len1 or 3 == len2 then
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 so ... , hence treat as ok
]]
local function is_valid_month_season_range(range_start, range_end, param)
local range_start_number = get_month_number (range_start);
local range_end_number;
if 0 == range_start_number then -- 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 return true; -- any season pairing is acceptedexcept when both are the same
end
return false; -- range_start and/or range_end is not a season
the output table receives:
rftdate: an IS8601 ISO 8601 formatted date rftchron: a free-form version of the date, usually without year which is in rftdate (season ranges and propername proper-name dates)
rftssn: one of four season keywords: winter, spring, summer, fall (lowercase)
rftquarter: one of four values: 1, 2, 3, 4
]]
local day = tonumber (input.day);
if (0 ~= day) and -- day must have a value for this to be a whole date
(((1582 == year) and (10 <= month) and (12 >= month)) or -- any whole 1582 date from 1 october October to 31 December or
((1926 == year) and (1 == month) and (1 == input.day)) or -- 1 January 1926 or
((1582 < year) and (1925 >= year))) then -- any date 1 January 1583 – 31 December 1925
tCOinS_date.inter_cal_cat = true; -- set category flag true
end
-- end temporary Julian / Gergorian Gregorian calendar uncertainty detection
if 1582 > tonumber(input.year) or 20 < tonumber(input.month) then -- Julian calendar or season so &rft.date gets year only
date = string.format ('%.4d/%.4d', tonumber(input.year), tonumber(input.year2)) -- assemble the date range
end
if 20 < tonumber(input.month) then -- if season or propername proper-name date local season = {[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
if 0 == input.month2 then -- single season date
if 30 40 <tonumber(input.month) then tCOinS_date.rftchron = season[input.month]; -- proper -name dates elseif 30 < tonumber(input.month) then tCOinS_date.rftquarter = season[input.month]; -- quarters
else
tCOinS_date.rftssn = season[input.month]; -- seasons
['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?)$', 'a', 'y', 'm', 'd'},
-- month/season range year; months separated by endash
['M-My'] = {'^(%D-)[%-–](%D-) +((%d%d%d%d)%a?)$', '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
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, accessdatepublication-date, access-date, pmc-embargo-date, archivedatearchive-date, etc.lay-date)
Returns:
]]
local function check_date (date_string, param, tCOinS_date, test_accessdate) local year; -- assume that year2, months, and days are not used; local year2=0; -- second year in a year range local month=0; local month2=0; -- second month in a month range local day=0; local day2=0; -- second day in a day range
local anchor_year;
local coins_date;
if date_string:match (patterns['ymd'][1]) then -- year-initial numerical year month day format
year, month, day=date_string:match (patterns['ymd'][1]);
if 12 < tonumber(month) or 1 > tonumber(month) or 1582 > tonumber(year) or 0 == tonumber(day) then return false; end -- month or day number not valid or not Gregorian calendar
anchor_year = year;
elseif mw.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);
if 0 == month then return false; end -- return false if month text isn't one of the twelve months
elseif mw.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]);
if tonumber(day) >= tonumber(day2) then return false; end -- date range order is left to right: earlier to later; dates may not be the same;
month = get_month_number (month);
if 0 == month then return false; end -- return false if month text isn't one of the twelve months
month2=month; -- for metadata
year2=year;
elseif mw.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);
if 0 == month then return false; 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
elseif mw.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]);
if tonumber(day) >= tonumber(day2) then return false; end -- date range order is left to right: earlier to later; dates may not be the same;
month = get_month_number (month);
if 0 == month then return false; end -- return false if month text isn't one of the twelve months
month2=month; -- for metadata year2=year;
elseif mw.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 (not is_valid_month_season_range(month, month2)) or not is_valid_year(year) then return false; 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;
elseif mw.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 (not is_valid_month_season_range(month, month2, param)) or not is_valid_year(year) then return false; end
month = get_month_number (month); -- for metadata
month2 = get_month_number (month2);
year2=year;
elseif mw.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]);
if tonumber(year2) <= tonumber(year) then return false; end -- must be sequential years, left to right, earlier to later
if not is_valid_year(year2) or not is_valid_month_range_style(month, month2) then return false; 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);
if 0 == month or 0 == month2 then return false; end -- both must be valid
elseif mw.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]);
if tonumber(year2) <= tonumber(year) then return false; end -- must be sequential years, left to right, earlier to later
if not is_valid_year(year2) or not is_valid_month_range_style(month, month2) then return false; 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); if 0 == month or 0 == month2 then return false; end -- both must be valid
elseif mw.ustring.match(date_string, patterns['Sy4-y2'][1]) then -- special case Winter/Summer year-year (YYYY-YY); year separated with unspaced endash
local century;
month, year, century, anchor_year, year2=mw.ustring.match(date_string, patterns['Sy4-y2'][1]);
if 'Winter' ~= month and 'Summer' ~= month then return false end; -- '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
if 1 ~= tonumber(year2) - tonumber(year) then return false; end -- must be sequential years, left to right, earlier to later
if not is_valid_year(year2) then return false; end -- no year farther in the future than next year
month = get_season_number (month, param);
elseif mw.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]);
if 'Winter' ~= month and 'Summer' ~= month then return false end; -- 'month' can only be Winter or Summer
anchor_year=year..'–'..anchor_year; -- assemble anchor_year from both years
if 1 ~= tonumber(year2) - tonumber(year) then return false; end -- must be sequential years, left to right, earlier to later
if not is_valid_year(year2) then return false; end -- no year farther in the future than next year
month = get_season_number (month, param); -- for metadata
elseif mw.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
if tonumber(year) >= tonumber(year2) then return false; end -- left to right, earlier to later, not the same
if not is_valid_year(year2) then return false; end -- no year farther in the future than next year
month = get_month_number(month);
month2 = get_month_number(month2);
elseif 0 ~= get_season_number(month, param) and 0 ~= get_season_number(month2, param) then -- both must be or season year, not mixed month = get_season_number(month, param); month2 = get_season_number(month2, param);
else
return false;
elseif mw.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 (not is_valid_month_season_range(month, month2, param)) or (not is_valid_year(year)) then return false; end
if 0 ~= 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);
if 0 == month or 0 == month2 then return false; end
else
month = get_season_number(month, param); month2 = get_season_number(month2, param);
end
year2=year;
elseif mw.ustring.match(date_string, patterns['My'][1]) then -- month/season year or /quarter/proper-name year month, anchor_year, year=mw.ustring.match(date_string, patterns['My'][1]);
if not is_valid_year(year) then return false; end
if not is_valid_month_or_season (month) and 0 == is_proper_name get_element_number(month, param) then return false; end if 0 ~= get_month_number(month) then -- determined to be a valid range so just check this one to know if get month season quarter proper-name number or season month = get_month_number(month);nil elseif 0 ~= get_season_number(if not month) then month = get_season_number(month); else month = is_proper_name (month)return false; end -- must be proper name; not supported in COinS endvalid whatever it is
elseif mw.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
if tonumber(year) >= tonumber(year2) then return false; end -- left to right, earlier to later, not the same
if not is_valid_year(year2) then return false; end -- no year farther in the future than next year
elseif mw.ustring.match(date_string, patterns['y4-y2'][1]) then -- Year range: YYYY–YY; separated by unspaced endash
local century;
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  if in_array (param, {'date', 'publication-date', 'year'}) then add_prop_cat ('year_range_abbreviated'); end 
if 13 > tonumber(year2) then return false; end -- don't allow 2003-05 which might be May 2003
year2 = century..year2; -- add the century to year2 for comparisons
if tonumber(year) >= tonumber(year2) then return false; end -- left to right, earlier to later, not the same
if not is_valid_year(year2) then return false; end -- no year farther in the future than next year
elseif mw.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]);
if false == is_valid_year(year) then
return false;
end
if test_accessdate 'access-date' == param then -- test accessdate here because we have numerical date parts
if 0 ~= year and 0 ~= month and 0 ~= day and -- all parts of a single date required
0 == year2 and 0 == month2 and 0 == day2 then -- none of these; accessdate must not be a range
if not is_valid_accessdate (year..'-'..month..'-'..day) then
return false; -- return false when accessdate out of bounds
end
local result=true; -- check whole dates for validity; assume true because not all dates will go through this test
if 0 ~= year and 0 ~= month and 0 ~= day and 0 == year2 and 0 == month2 and 0 == day2 then -- YMD (simple whole date)
result=is_valid_date(year,month,day);
elseif 0 ~= year and 0 ~= month and 0 ~= day and 0 == year2 and 0 == month2 and 0 ~= day2 then -- YMD-d (day range)
result=is_valid_date(year,month,day); result=result and is_valid_date(year,month,day2);
elseif 0 ~= year and 0 ~= month and 0 ~= day and 0 == year2 and 0 ~= month2 and 0 ~= day2 then -- YMD-md (day month range)
result=is_valid_date(year,month,day); result=result and is_valid_date(year,month2,day2);
elseif 0 ~= year and 0 ~= month and 0 ~= day and 0 ~= year2 and 0 ~= month2 and 0 ~= day2 then -- YMD-ymd (day month year range)
result=is_valid_date(year,month,day); result=result and is_valid_date(year2,month2,day2);
end
if nil ~= tCOinS_date then -- 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
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,
a single error message is created parameters with errors are added to the <error_list> sequence table as the dates are tested.
]]
local function dates(date_parameters_list, tCOinS_date, error_list) local anchor_year; -- will return as nil if the date being tested is not |date= local COinS_date; -- will return as nil if the date being tested is not |date=
local embargo_date; -- if embargo date is a good dmy, mdy, ymd date then holds original value else reset to 9999
local error_message = "";
local good_date = false;
for k, v in pairs(date_parameters_list) do -- for each date-holding parameter in the list
if is_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
if v.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=
local year = v.val:match("c%. ([1-9]%d%d%d?)%a?"); -- get the year portion so it can be tested
if 'date'==k then
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'==k then
good_date = is_valid_year(year);
end
elseif 'date'==k then -- if the parameter is |date= if v.val:match("^n%.d%.%a?$") then -- ToDo: I18N -- if |date=n.d. with or without a CITEREF disambiguator good_date, anchor_year, COinS_date = true, v.val:match("((n%.d%.)%a?)"); -- ToDo: I18N --"n.d."; no error when date parameter is set to no date elseif v.val:match("^nd%a?$") 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'==k then -- if the parameter is |year= it should hold only a year value if v.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 'accesspmc-embargo-date'==k then -- if the parameter is |pmc-embargo-date= good_date = check_date (v.val, nil, true); -- go test the date; nil is a placeholder; true is the test_accessdate flag elseif 'embargo'==k then -- if the parameter is |embargo= good_date = check_date (v.val); -- go test the date
if true == good_date then -- 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; no: returns 9999
end
else -- any other date-holding parameter
good_date = check_date (v.val, k); -- go test the date
end
if false==good_date then -- assemble one error message so we don't add the tracking category multiple times if is_settable.insert (error_message) then -- once weerror_list, wrap_style ('parameter've added the first portion of the error message ... error_message=error_message .. ", "; -- ... add a comma space separator end error_message=error_message .. "&#124;" .. v.name .. "=")); -- add the failed make parametername suitable for error message list
end
end
end
return anchor_year, embargo_date, error_message; -- and done
end
reformatted. Does the grunt work for reformat_dates().
The table re_formats maps patern_idx 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
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
end
-- yMd is not supported at en.wiki -- if 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 is supported at your wiki, remove or comment-out the next line if 'yMd' == format_param then -- yMd not supported at en.wiki
return; -- not a reformattable date
end
[patterns[pattern_idx][8] or 'x'] = c7;
};
 
if t.a then -- if this date has an anchor year capture
t.y = t.a; -- use the anchor year capture when reassembling the date
end
if tonumber(t.m) then -- if raw month is a number (converting from ymd)
for param_name, param_val in pairs(date_parameters_list) do -- for each date-holding parameter in the list
if is_set (param_val.val) then
if not mw.ustring.match (param_val.val, '%d%d%d%d%-%d%d%-%d%d') then -- for those that are not ymd dates (ustring because here digits may not be westernWestern)
param_val.val, n = param_val.val:gsub ('%-', '–'); -- replace any hyphen with ndash
if 0 ~= n then
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 Western (English) digits to the local language's digits.
This will also translate ymd dates.
]]
local function date_name_xlate (date_parameters_list, xlt_dig)
local xlate;
local mode; -- long or short month names
if xlt_dig then -- shall we also translate digits?
date = date:gsub ('%d', cfg.date_names.xlate_digits); -- translate digits from western Western to 'local digits'
date_parameters_list[param_name].val = date; -- save the translated date
modified = true;
local function set_selected_modules (cfg_table_ptr, utilities_page_ptr)
is_set add_prop_cat = utilities_page_ptr.is_setadd_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; -- import functions from selected Module:Citation/CS1/Utilities moduleset_message = utilities_page_ptr.set_message; wrap_style = utilities_page_ptr.wrap_style; 
cfg = cfg_table_ptr; -- import tables from selected Module:Citation/CS1/Configuration
end