Compendium of Cancer Genome Aberrations

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Module:Citation/CS1/Date validation (view source)

Revision as of 07:42, 11 December 2020

57,299 bytes added ,  07:42, 11 December 2020
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--[[--------------------------< 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
 +
 +
 +
--[=[-------------------------< 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-Engish 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 lang = mw.getContentLanguage();
 +
local good1, good2;
 +
local access_ts, tomorrow_ts; -- to hold unix time stamps representing the dates
 +
 +
good1, access_ts = pcall( lang.formatDate, lang, 'U', accessdate ); -- convert accessdate value to unix timesatmp
 +
good2, tomorrow_ts = pcall( lang.formatDate, lang, '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:parseFormattedNumber (access_ts); -- convert to numbers for the comparison;
 +
tomorrow_ts = tonumber (tomorrow_ts) or lang: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
 +
 +
 +
--[[--------------------------< 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
 +
 +
 +
--[[--------------------------< 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 _ 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 for Winter, etc.  Capitalization and spelling must be correct. If not a valid season, returns 0
 +
 +
Uses ISO DIS 8601 2016 part 2 §4.7  Divisions of a year for hemishpere-independent seasons:
 +
21-24 = Spring, Summer, Autumn, Winter, independent of “Hemisphere”
 +
 +
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)
 +
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
 +
 +
 +
--[[--------------------------< I S _ P R O P E R _ N A M E >--------------------------------------------------
 +
 +
returns a non-zero number if date contains a recognized proper name.  Capitalization and spelling must be correct.
 +
 +
]]
 +
 +
local function is_proper_name (name)
 +
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
 +
 +
 +
--[[--------------------------< I S _ V A L I D _ M O N T H _ O R _ S E A S O N >------------------------------
 +
 +
--returns true if month or season is valid (properly spelled, capitalized, abbreviated)
 +
 +
]]
 +
 +
local function is_valid_month_or_season (month_season)
 +
if 0 == get_month_number (month_season) then -- if month text isn't one of the twelve months, might be a season
 +
if 0 == get_season_number (month_season) then -- not a month, is it a season?
 +
return false; -- return false not a month or one of the five seasons
 +
end
 +
end
 +
return true;
 +
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 year_limit;
 +
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
 +
return tonumber(year) <= year_limit; -- false if year is in the future more than one year
 +
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
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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
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else
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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
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else
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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
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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=<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 IS8601 formatted date
 +
rftchron: a free-form version of the date, usually without year which is in rftdate (season ranges and propername dates)
 +
rftssn: one of four season keywords: winter, spring, summer, fall (lowercase)
 +
 +
]]
 +
 +
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 propername date
 +
local season = {[24]='winter', [21]='spring', [22]='summer', [23]='fall', [99]='Christmas'}; -- seasons lowercase, no autumn; proper names use title case
 +
if 0 == input.month2 then -- single season date
 +
if 30 <tonumber(input.month) then
 +
tCOinS_date.rftchron = season[input.month]; -- proper name dates
 +
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?)$', 'm', 'm2', 'a', 'y'},
 +
-- month/season year or proper-name year
 +
['My'] = {'^([^%d–]-) +((%d%d%d%d)%a?)$', '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
 +
}
 +
 +
 +
--[[--------------------------< 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 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
 +
-- 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 year or 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 (month) 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);
 +
elseif 0 ~= get_season_number(month) then
 +
month = get_season_number(month);
 +
else
 +
month = is_proper_name (month); -- must be proper name; not supported in COinS
 +
end
 +
 +
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 date_string:match (patterns['y'][1]) then -- year; here accept either YYY or YYYY
 +
anchor_year, year=date_string:match (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 test_accessdate 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, 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 'access-date'==k then -- if the parameter is |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 |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); -- 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 .. "&#124;" .. 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 = mw.getContentLanguage():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
 +
}
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