Module:Sandbox/Matthiaspaul/Citation/CS1/Date validation
--[[
History of changes since last sync: 2020-04-18
]]
--[[--------------------------< F O R W A R D D E C L A R A T I O N S >--------------------------------------
]]
local is_set, in_array; -- imported functions from selected Module:Citation/CS1/Utilities
local cfg; -- 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
]]
local lang_object = mw.getContentLanguage(); -- used by is_valid_accessdate(), is_valid_year(), date_name_xlate(); TODO: move to ~/Configuration?
local year_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 |accessdate= 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.
]=]
local function is_valid_accessdate (accessdate)
local good1, good2;
local access_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 timesatmp
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 which tonumber() may not understand
access_ts = tonumber (access_ts) or lang_object:parseFormattedNumber (access_ts); -- convert to numbers for the comparison;
tomorrow_ts = tonumber (tomorrow_ts) or lang_object:parseFormattedNumber (tomorrow_ts);
else
return false; -- one or both failed to convert to unix time stamp
end
if 979516800 <= access_ts and access_ts < tomorrow_ts then -- Wikipedia start date <= accessdate < tomorrow's date
return true;
else
return false; -- accessdate out of range
end
end
--[[--------------------------< 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 |embargo= is
set, the editor intended to embargo a pmc but |embargo= does not hold a single date.
]]
local function is_valid_embargo_date (v)
if v:match ('^%d%d%d%d%-%d%d%-%d%d$') or -- ymd
v:match ('^%d%d?%s+%a+%s+%d%d%d%d$') or -- dmy
v:match ('^%a+%s+%d%d?%s*,%s*%d%d%d%d$') then -- mdy
return true, v;
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: 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 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
hemispere 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)
]]
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
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 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)
]]
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 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 is not |date=
]]
local function 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
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)
]]
local function get_element_number (element, param)
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 (funcs) do -- spin through the function list
num = func (element, param); -- call the function and get the returned number
if 0 ~= num then -- non-zero when valid month season quarter
return num; -- return that number
end
end
return nil; -- 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
end
year = tonumber (year) or lang_object:parseFormattedNumber (year); -- convert to numbers for the comparison;
return year and (year <= year_limit) or false;
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.
]]
local function is_valid_date (year, month, day)
local days_in_month = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
local month_length;
if not is_valid_year(year) then -- no farther into the future than next year
return false;
end
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 tonumber (day) > month_length then
return false;
end
return true;
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.
There is a special test for May because it can be either short or long form.
Returns true when style for both months is the same
]]
local function is_valid_month_range_style (month1, month2)
local len1 = month1:len();
local len2 = month2:len();
if len1 == len2 then
return true; -- both months are short form so return true
elseif 'May' == month1 or 'May'== month2 then
return true; -- both months are long form so return true
elseif 3 == len1 or 3 == len2 then
return false; -- months are mixed form so return false
else
return true; -- both months are long form so return true
end
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 so ... ok
]]
local function is_valid_month_season_range(range_start, range_end)
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); -- not a month; is it a season? get start season number
range_end_number = get_season_number (range_end); -- get end season number
if (0 ~= range_start_number) and (0 ~= range_end_number) then
return true; -- any season pairing is accepted
end
return false; -- 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
if range_start_number < range_end_number then -- range_start is a month; does range_start precede range_end?
if is_valid_month_range_style (range_start, range_end) then -- do months have the same style?
return true; -- proper order and same style
end
end
return false; -- 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=
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 IS8601 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
]]
local function make_COinS_date (input, tCOinS_date)
local date; -- one date or first date in a range
local date2 = ''; -- end of range date
-- start temporary Julian / Gregorian calendar uncertainty detection
local year = tonumber(input.year); -- this temporary code to determine the extent of sources dated to the Julian/Gregorian
local month = tonumber(input.month); -- interstice 1 October 1582 – 1 January 1926
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 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 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 = input.year;
if 0 ~= input.year2 and input.year ~= input.year2 then -- if a range, only the second year portion when not the same as range start year
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 proper-name date
local season = {[24]='winter', [21]='spring', [22]='summer', [23]='fall', [33]='1', [34]='2', [35]='3', [36]='4', [99]='Christmas'}; -- seasons lowercase, no autumn; proper-names use title case
if 0 == input.month2 then -- single season date
if 40 tCOinS_date.rftchron = season[input.month]; -- proper-name dates elseif 30 tCOinS_date.rftquarter = season[input.month]; -- quarters else tCOinS_date.rftssn = season[input.month]; -- seasons end else -- season range with a second season specified if input.year ~= input.year2 then -- season year – season year range or season year–year tCOinS_date.rftssn = season[input.month]; -- start of range season; keep this? if 0~= input.month2 then tCOinS_date.rftchron = string.format ('%s %s – %s %s', season[input.month], input.year, season[input.month2], input.year2); end else -- season–season year range tCOinS_date.rftssn = season[input.month]; -- start of range season; keep this? tCOinS_date.rftchron = season[input.month] .. '–' .. season[input.month2]; -- season–season year range end end end tCOinS_date.rftdate = date; return; -- done end if 0 ~= input.day then date = string.format ('%s-%.2d-%.2d', input.year, tonumber(input.month), tonumber(input.day)); -- whole date elseif 0 ~= input.month then date = string.format ('%s-%.2d', input.year, tonumber(input.month)); -- year and month else date = string.format ('%s', input.year); -- just year end if 0 ~= input.year2 then if 0 ~= input.day2 then date2 = string.format ('/%s-%.2d-%.2d', input.year2, tonumber(input.month2), tonumber(input.day2)); -- whole date elseif 0 ~= input.month2 then 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() ]] local patterns = { -- 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 ['Q,y'] = {'^(Q%a* +[1-4]), +((%d%d%d%d)%a?)$'}, -- Quarter n, yyyy ['Sy4-y2'] = {'^(%D-) +((%d%d)%d%d)[%-–]((%d%d)%a?)$'}, -- 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 } --[[--------------------------< 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 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, accessdate, embargo, archivedate, etc.) 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() ]] --local function check_date (date_string, tCOinS_date, test_accessdate) local function check_date (date_string, param, tCOinS_date) 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['Q,y'][1]) then -- quarter n, year; here because much the same as Mdy month, anchor_year, year=mw.ustring.match(date_string, patterns['Q,y'][1]); if not is_valid_year(year) then return false; end month = get_quarter_number (month, param); -- get quarter number or nil if not month then return false; end -- not valid whatever it is 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 -- end NOT supported at en.wiki ]] 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)) 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); 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); 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); 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); -- 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 if 0 ~= get_month_number(month) and 0 ~= get_month_number(month2) and is_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); elseif 0 ~= get_season_number(month) and 0 ~= get_season_number(month2) then -- both must be or season year, not mixed month = get_season_number(month); month2 = get_season_number(month2); else return false; end 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)) 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); else month = get_season_number(month); month2 = get_season_number(month2); end year2=year; elseif mw.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]); if not is_valid_year(year) then return false; end month = get_element_number (month, param); -- get month season quarter proper-name number or nil if not month then return false; end -- not valid whatever it is -- elseif mw.ustring.match(date_string, patterns['Q,y'][1]) then -- quarter n, year -- month, anchor_year, year=mw.ustring.match(date_string, patterns['My'][1]); -- if not is_valid_year(year) then return false; end -- month = get_quarter_number (month, param); -- get quarter number or nil -- if not month then return false; end -- not valid 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 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 else return false; -- date format not one of the MOS:DATE approved formats end if '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 else return false; -- return false when accessdate is a range of two dates end 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 false == result then return false; 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 return true, 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, a single error message is created as the dates are tested. ]] local function dates(date_parameters_list, tCOinS_date) 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 -- if |date=n.d. with or without a CITEREF disambiguator good_date, anchor_year, COinS_date = true, v.val:match("((n%.d%.)%a?)"); --"n.d."; no error when date parameter is set to no date elseif v.val:match("^nd%a?$") then -- if |date=nd with or without a CITEREF disambiguator good_date, anchor_year, COinS_date = true, v.val:match("((nd)%a?)"); --"nd"; no error when date parameter is set to no date else good_date, anchor_year, COinS_date = check_date (v.val, k, tCOinS_date); -- go test the date end elseif 'year'==k then -- if the parameter is |year= it should hold only a year value if v.val:match("^[1-9]%d%d%d?%a?$") 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 '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 |embargo= 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_set(error_message) then -- once we've added the first portion of the error message ... error_message=error_message .. ", "; -- ... add a comma space separator end error_message=error_message .. "|" .. v.name .. "="; -- add the failed parameter end end end return anchor_year, embargo_date, error_message; -- 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 returns a 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) ]] local function year_date_check (year_string, date_string) local year; local date1; local date2; local result = 1; -- result of the test; assume that the test passes year = year_string:match ('(%d%d%d%d?)'); if date_string:match ('%d%d%d%d%-%d%d%-%d%d') and year_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)'); if year ~= date1 then result = 0; -- years don't match else result = 2; -- years match; but because disambiguated, don't add to maint cat end elseif date_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?)"); if year ~= date1 and year ~= date2 then result = 0; end elseif mw.ustring.match(date_string, "%d%d%d%d[%-–]%d%d") then -- YYYY-YY date ranges local century; date1, century, date2 = mw.ustring.match(date_string, "((%d%d)%d%d)[%-–]+(%d%d)"); date2 = century..date2; -- convert YY to YYYY if year ~= date1 and year ~= date2 then result = 0; end elseif date_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?)"); if year ~= date1 then result = 0; end else result = 0; -- no recognizable year in date end return result; 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 patern_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.. ]] local re_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 -- }, } local function reformatter (date, pattern_idx, format_param, mon_len) if not in_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_param and in_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 if in_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 -- if 'yMd' == format_param and in_array (pattern_idx, {'yMd', 'Md-dy', 'd-dMy', 'dM-dMy', 'Md-Mdy', 'dMy-dMy', 'Mdy-Mdy'}) then -- not supported at en.wiki if 'yMd' == format_param then -- not supported at en.wiki return; -- not a reformattable date end local c1, 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 local t = { -- 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; }; if tonumber(t.m) then -- if raw month is a number (converting from ymd) if 's' == mon_len then -- if we are to use abbreviated month names t.m = cfg.date_names['inv_local_s'][tonumber(t.m)]; -- convert it to a month name else t.m = cfg.date_names['inv_local_l'][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_param then -- when converting to ymd if 1582 > 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); elseif mon_len then -- if mon_len is set to either 'short' or 'long' for _, mon in ipairs ({'m', 'm2'}) do -- because there can be two month names, check both if t[mon] then t[mon] = get_month_number (t[mon]); -- get the month number for this month (is length agnostic) if 0 == t[mon] then return; end -- seasons and named dates can't be converted t[mon] = (('s' == mon_len) and cfg.date_names['inv_local_s'][t[mon]]) or cfg.date_names['inv_local_l'][t[mon]]; -- fetch month name according to length end end end local new_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]] ); return new_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(). ]] local function reformat_dates (date_parameters_list, format) local all = false; -- set to false to skip access- and archive-dates local len_p = 'l'; -- default publication date length shall be long local len_a = 'l'; -- default access-/archive-date length shall be long local result = false; local new_date; if format: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 elseif format: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_p then -- because allowed by MOS:DATEUNIFY (sort of) range dates and My dates not reformatted format = 'ymd'; -- override {{use xxx dates}} elseif (not is_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 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 the parameter has a value if not (not all and in_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 for pattern_idx, pattern in pairs (patterns) do if mw.ustring.match (param_val.val, pattern[1]) then if all and in_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') or format, 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 if new_date then -- 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 end end -- if end -- for end -- if end -- if end -- for return result; -- 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. ]] local function date_hyphen_to_dash (date_parameters_list) local result = false; local n; 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 western) param_val.val, n = param_val.val:gsub ('%-', '–'); -- replace any hyphen with ndash if 0 ~= n then date_parameters_list[param_name].val = param_val.val; -- update the list result = true; end end end end return result; -- 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 month names to local-language month 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. ]] local function date_name_xlate (date_parameters_list, xlt_dig) local xlate; local mode; -- long or short month names local modified = false; local date; 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 the parameter has a value date = param_val.val; for month in mw.ustring.gmatch (date, '%a+') do -- iterate through all dates in the date (single date or date range) if cfg.date_names.en.long[month] then mode = 'F'; -- English name is long so use long local name elseif cfg.date_names.en.short[month] then mode = 'M'; -- English name is short so use short local name else mode = nil; -- not an English month name; could be local language month name or an English season name end if mode then -- might be a season xlate = lang_object:formatDate(mode, '1' .. month); -- translate the month name to this local language 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 if xlt_dig then -- 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 return modified; 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. ]] local function set_selected_modules (cfg_table_ptr, utilities_page_ptr) is_set = utilities_page_ptr.is_set; -- import functions from selected Module:Citation/CS1/Utilities module in_array = utilities_page_ptr.in_array; -- import functions from selected Module:Citation/CS1/Utilities module cfg = cfg_table_ptr; -- import tables from selected Module:Citation/CS1/Configuration end --[[--------------------------< E X P O R T E D F U N C T I O N S >------------------------------------------ ]] return { -- return exported functions dates = dates, year_date_check = year_date_check, reformat_dates = reformat_dates, date_hyphen_to_dash = date_hyphen_to_dash, date_name_xlate = date_name_xlate, set_selected_modules = set_selected_modules }