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Module:Citation/CS1/Date validation

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这个文档嵌入自Module:Citation/CS1/Date validation/doc。
Other Wiki 本页面全部或部分內容原来自中文维基百科页面模块:Citation/CS1，依 CC BY-SA 3.0 授权引入；原贡献者可以在这里看到。经过双方编者的修改，本页面可能已与来源有很大差异。

这个模块及其相关的下级模块支持Citation Style 1以及Citation Style 2格式的引文模板。这两者通常简称为CS1和CS2。

cs1 • cs2 模块
在用的 沙盒 简介
Module:Citation/CS1 Module:Citation/CS1/sandbox [编辑] Rendering and support functions
Module:Citation/CS1/Configuration Module:Citation/CS1/Configuration/sandbox [编辑] Translation tables; error and identifier handlers
Module:Citation/CS1/Whitelist Module:Citation/CS1/Whitelist/sandbox [编辑] List of active, deprecated, and obsolete cs1 • 2 parameters
Module:Citation/CS1/Date validation Module:Citation/CS1/Date validation/sandbox [编辑] Date format validation functions
Module:Citation/CS1/Identifiers Module:Citation/CS1/Identifiers/sandbox [编辑] Functions that support the named identifiers (isbn, doi, pmid, etc)
Module:Citation/CS1/Utilities Module:Citation/CS1/Utilities/sandbox [编辑] Common functions and tables
Module:Citation/CS1/COinS Module:Citation/CS1/COinS/sandbox [编辑] Functions that render a cs1 • 2 template's metadata
Module:Citation/CS1/Suggestions Module:Citation/CS1/Suggestions/sandbox [编辑] List that maps common erroneous parameter names to valid parameter names 
  1.  
  2. local p = {}
  3.  
  4. --[[--------------------------< I S _ V A L I D _ A C C E S S D A T E >----------------------------------------
  5.  
  6. returns true if:
  7. 	Wikipedia start date <= accessdate < today + 2 days
  8.  
  9. 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)
  10. accessdate is the date provided in |accessdate= at time 00:00:00 UTC
  11. today is the current date at time 00:00:00 UTC plus 48 hours
  12. 	if today is 2015-01-01T00:00:00 then
  13. 		adding 24 hours gives 2015-01-02T00:00:00 – one second more than today
  14. 		adding 24 hours gives 2015-01-03T00:00:00 – one second more than tomorrow
  15.  
  16. ]]
  17.  
  18. local function is_valid_accessdate (accessdate)
  19. 	local lang = mw.getContentLanguage();
  20. 	local good1, good2;
  21. 	local access_ts, tomorrow_ts;												-- to hold unix time stamps representing the dates
  22. 		
  23. 	accessdate = accessdate:gsub("年", "-");
  24. 	accessdate = accessdate:gsub("月", "-");
  25. 	accessdate = accessdate:gsub("日", "-");
  26. 	accessdate = accessdate:gsub("-$", "");
  27. 	good1, access_ts = pcall( lang.formatDate, lang, 'U', accessdate );			-- convert accessdate value to unix timesatmp 
  28. 	good2, tomorrow_ts = pcall( lang.formatDate, lang, 'U', 'today + 2 days' );	-- today midnight + 2 days is one second more than all day tomorrow
  29. 	
  30. 	if good1 and good2 then
  31. 		access_ts = tonumber (access_ts);										-- convert to numbers for the comparison
  32. 		tomorrow_ts = tonumber (tomorrow_ts);
  33. 	else
  34. 		return false;															-- one or both failed to convert to unix time stamp
  35. 	end
  36. 	
  37. 	if 979516800 <= access_ts and access_ts < tomorrow_ts then					-- Wikipedia start date <= accessdate < tomorrow's date
  38. 		return true;
  39. 	else
  40. 		return false;															-- accessdate out of range
  41. 	end
  42. end
  43.  
  44. --[[--------------------------< G E T _ M O N T H _ N U M B E R >----------------------------------------------
  45.  
  46. 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
  47.  
  48. ]]
  49.  
  50. local function get_month_number (month)
  51. local long_months = {['January']=1, ['February']=2, ['March']=3, ['April']=4, ['May']=5, ['June']=6, ['July']=7, ['August']=8, ['September']=9, ['October']=10, ['November']=11, ['December']=12};
  52. local short_months = {['Jan']=1, ['Feb']=2, ['Mar']=3, ['Apr']=4, ['May']=5, ['Jun']=6, ['Jul']=7, ['Aug']=8, ['Sep']=9, ['Oct']=10, ['Nov']=11, ['Dec']=12};
  53. local zh_months = {['1月']=1, ['2月']=2, ['3月']=3, ['4月']=4, ['5月']=5, ['6月']=6, ['7月']=7, ['8月']=8, ['9月']=9, ['10月']=10, ['11月']=11, ['12月']=12}; -- LOCAL
  54. local temp;
  55. 	temp=long_months[month];
  56. 	if temp then return temp; end				-- if month is the long-form name
  57. 	temp=short_months[month];
  58. 	if temp then return temp; end				-- if month is the short-form name
  59. 	temp=zh_months[month]; -- LOCAL
  60. 	if temp then return temp; end				-- if month is in Chinese -- LOCAL
  61. 	return 0;									-- misspelled, improper case, or not a month name
  62. end
  63.  
  64. --[[--------------------------< G E T _ S E A S O N _ N U M B E R >--------------------------------------------
  65.  
  66. 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
  67.  
  68. ]]
  69.  
  70. local function get_season_number (season)
  71. local season_list = {['Winter']=21, ['Spring']=22, ['Summer']=23, ['Fall']=24, ['Autumn']=24};	-- make sure these numbers do not overlap month numbers
  72. local temp;
  73. 	temp=season_list[season];
  74. 	if temp then return temp; end												-- if season is a valid name return its number
  75. 	return 0;																	-- misspelled, improper case, or not a season name
  76. end
  77.  
  78. --[[--------------------------< I S _ P R O P E R _ N A M E >--------------------------------------------------
  79.  
  80. returns a non-zero number if date contains a recognized proper name.  Capitalization and spelling must be correct.
  81.  
  82. ]]
  83.  
  84. local function is_proper_name (name)
  85. local name_list = {['Christmas']=31}
  86. local temp;
  87. 	temp=name_list[name];
  88. 	if temp then return temp; end				-- if name is a valid name return its number
  89. 	return 0;									-- misspelled, improper case, or not a proper name
  90. end
  91.  
  92. --[[--------------------------< I S _ V A L I D _ M O N T H _ O R _ S E A S O N >------------------------------
  93.  
  94. --returns true if month or season is valid (properly spelled, capitalized, abbreviated)
  95.  
  96. ]]
  97.  
  98. local function is_valid_month_or_season (month_season)
  99. 	if 0 == get_month_number (month_season) then		-- if month text isn't one of the twelve months, might be a season
  100. 		if 0 == get_season_number (month_season) then	-- not a month, is it a season?
  101. 			return false;								-- return false not a month or one of the five seasons
  102. 		end
  103. 	end
  104. 	return true;
  105. end
  106.  
  107. --[[--------------------------< I S _ V A L I D _ Y E A R >----------------------------------------------------
  108.  
  109. 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.
  110.  
  111. ]]
  112.  
  113. local function is_valid_year(year)
  114. 	if not is_set(year_limit) then
  115. 		year_limit = tonumber(os.date("%Y"))+1;			-- global variable so we only have to fetch it once
  116. 	end
  117. 	return tonumber(year) <= year_limit;				-- false if year is in the future more than one year
  118. end
  119.  
  120. --[[--------------------------< I S _ V A L I D _ D A T E >----------------------------------------------------
  121. Returns true if day is less than or equal to the number of days in month and year is no farther into the future
  122. than next year; else returns false.
  123.  
  124. Assumes Julian calendar prior to year 1582 and Gregorian calendar thereafter. Accounts for Julian calendar leap
  125. years before 1582 and Gregorian leap years after 1582. Where the two calendars overlap (1582 to approximately
  126. 1923) dates are assumed to be Gregorian.
  127.  
  128. ]]
  129.  
  130. local function is_valid_date (year, month, day)
  131. local days_in_month = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
  132. local month_length;
  133. 	if not is_valid_year(year) then												-- no farther into the future than next year
  134. 		return false;
  135. 	end
  136. 	
  137. 	month = tonumber(month);													-- required for YYYY-MM-DD dates
  138. 	
  139. 	if (2==month) then															-- if February
  140. 		month_length = 28;														-- then 28 days unless
  141. 		if 1582 > tonumber(year) then											-- Julian calendar
  142. 			if 0==(year%4) then
  143. 				month_length = 29;
  144. 			end
  145. 		else																	-- Gregorian calendar
  146. 			if (0==(year%4) and (0~=(year%100) or 0==(year%400))) then			-- is a leap year?
  147. 				month_length = 29;												-- if leap year then 29 days in February
  148. 			end
  149. 		end
  150. 	else
  151. 		month_length=days_in_month[month];
  152. 	end
  153.  
  154. 	if tonumber (day) > month_length then
  155. 		return false;
  156. 	end
  157. 	return true;
  158. end
  159.  
  160. --[[--------------------------< I S _ V A L I D _ M O N T H _ R A N G E _ S T Y L E >--------------------------
  161.  
  162. Months in a range are expected to have the same style: Jan–Mar or October–December but not February–Mar or Jul–August. 
  163. There is a special test for May because it can be either short or long form.
  164.  
  165. Returns true when style for both months is the same
  166.  
  167. ]]
  168.  
  169. local function is_valid_month_range_style (month1, month2)
  170. local len1 = month1:len();
  171. local len2 = month2:len();
  172. 	if len1 == len2 then
  173. 		return true;															-- both months are short form so return true
  174. 	elseif 'May' == month1 or 'May'== month2 then
  175. 		return true;															-- both months are long form so return true
  176. 	elseif 3 == len1 or 3 == len2 then
  177. 		return false;															-- months are mixed form so return false
  178. 	else
  179. 		return true;															-- both months are long form so return true
  180. 	end
  181. end
  182.  
  183.  
  184. --[[--------------------------< I S _ V A L I D _ M O N T H _ S E A S O N _ R A N G E >------------------------
  185.  
  186. Check a pair of months or seasons to see if both are valid members of a month or season pair.
  187.  
  188. Month pairs are expected to be left to right, earliest to latest in time.
  189.  
  190. Similarly, seasons are also left to right, earliest to latest in time.  There is an oddity with seasons: winter is assigned a value of 1, spring 2, ...,
  191. fall and autumn 4.  Because winter can follow fall/autumn at the end of a calender year, a special test is made to see if |date=Fall-Winter yyyy (4-1) is the date.
  192.  
  193. ]]
  194.  
  195. local function is_valid_month_season_range(range_start, range_end)
  196. 	local range_start_number = get_month_number (range_start);
  197. 	
  198. 	if 0 == range_start_number then												-- is this a month range?
  199. 		local range_start_number = get_season_number (range_start);				-- not a month; is it a season? get start season number
  200. 		local range_end_number = get_season_number (range_end);					-- get end season number
  201.  
  202. 		if 0 ~= range_start_number then											-- is start of range a season?
  203. 			if range_start_number < range_end_number then						-- range_start is a season
  204. 				return true;													-- return true when range_end is also a season and follows start season; else false
  205. 			end
  206. 			if 24 == range_start_number and 21 == range_end_number then			-- special case when season range is Fall-Winter or Autumn-Winter
  207. 				return true;
  208. 			end
  209. 		end
  210. 		return false;		-- range_start is not a month or a season; or range_start is a season and range_end is not; or improper season sequence
  211. 	end
  212.  
  213. 	local range_end_number = get_month_number (range_end);						-- get end month number
  214. 	if range_start_number < range_end_number then								-- range_start is a month; does range_start precede range_end?
  215. 		if is_valid_month_range_style (range_start, range_end) then				-- do months have the same style?
  216. 			return true;														-- proper order and same style
  217. 		end
  218. 	end
  219. 	return false;																-- range_start month number is greater than or equal to range end number; or range end isn't a month
  220. end
  221.  
  222.  
  223. --[[--------------------------< M A K E _ C O I N S _ D A T E >------------------------------------------------
  224.  
  225. This function receives a table of date parts for one or two dates and an empty table reference declared in
  226. Module:Citation/CS1.  The function is called only for |date= parameters and only if the |date=<value> is 
  227. determined to be a valid date format.  The question of what to do with invalid date formats is not answered here.
  228.  
  229. The date parts in the input table are converted to an ISO 8601 conforming date string:
  230. 	single whole dates:		yyyy-mm-dd
  231. 	month and year dates:	yyyy-mm
  232. 	year dates:				yyyy
  233. 	ranges:					yyyy-mm-dd/yyyy-mm-dd
  234. 							yyyy-mm/yyyy-mm
  235. 							yyyy/yyyy
  236.  
  237. Dates in the Julian calendar are reduced to year or year/year so that we don't have to do calendar conversion from
  238. Julian to Proleptic Gregorian.
  239.  
  240. The input table has:
  241. 	year, year2 – always present; if before 1582, ignore months and days if present
  242. 	month, month2 – 0 if not provided, 1-12 for months, 21-24 for seasons; 31– proper name dates
  243. 	day, day2 –  0 if not provided, 1-31 for days
  244. 	
  245. the output table receives:
  246. 	rftdate:	an IS8601 formatted date
  247. 	rftchron:	a free-form version of the date, usually without year which is in rftdate (season ranges and propername dates)
  248. 	rftssn:		one of four season keywords: winter, spring, summer, fall (lowercase)
  249.  
  250. ]]
  251.  
  252. local function make_COinS_date (input, tCOinS_date)
  253. 	local date;																	-- one date or first date in a range
  254. 	local date2 = '';															-- end of range date
  255. 	
  256. 	if 1582 > tonumber(input.year) or 20 < tonumber(input.month) then			-- Julian calendar or season so &rft.date gets year only
  257. 		date = input.year;
  258. 		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
  259. 			date = string.format ('%.4d/%.4d', tonumber(input.year), tonumber(input.year2))		-- assemble the date range
  260. 		end
  261. 		if 20 < tonumber(input.month) then										-- if season or propername date
  262. 			local season = {[21]='winter', [22]='spring', [23]='summer', [24]='fall', [31]='Christmas'};	-- seasons lowercase, no autumn; proper names use title case
  263. 			if 0 == input.month2 then											-- single season date
  264. 				if 30 <tonumber(input.month) then
  265. 					tCOinS_date.rftchron = season[input.month];					-- proper name dates
  266. 				else
  267. 					tCOinS_date.rftssn = season[input.month];					-- seasons
  268. 				end
  269. 			else																-- season range with a second season specified
  270. 				if input.year ~= input.year2 then								-- season year – season year range or season year–year
  271. 					tCOinS_date.rftssn = season[input.month];					-- start of range season; keep this?
  272. 					if 0~= month2 then
  273. 						tCOinS_date.rftchron = string.format ('%s %s – %s %s', season[input.month], input.year, season[input.month2], input.year2);
  274. 					end
  275. 				else															-- season–season year range
  276. 					tCOinS_date.rftssn = season[input.month];					-- start of range season; keep this?
  277. 					tCOinS_date.rftchron = season[input.month] .. '–' .. season[input.month2];	-- season–season year range
  278. 				end
  279. 			end
  280. 		end
  281. 		tCOinS_date.rftdate = date;
  282. 		return;																	-- done
  283. 	end
  284. 	
  285. 	if 0 ~= input.day then
  286. 		date = string.format ('%s-%.2d-%.2d', input.year, tonumber(input.month), tonumber(input.day));	-- whole date
  287. 	elseif 0 ~= input.month then
  288. 		date = string.format ('%s-%.2d', input.year, tonumber(input.month));	-- year and month
  289. 	else
  290. 		date = string.format ('%s', input.year);								-- just year
  291. 	end
  292.  
  293. 	if 0 ~= input.year2 then
  294. 		if 0 ~= input.day2 then
  295. 			date2 = string.format ('/%s-%.2d-%.2d', input.year2, tonumber(input.month2), tonumber(input.day2));		-- whole date
  296. 		elseif 0 ~= input.month2 then
  297. 			date2 = string.format ('/%s-%.2d', input.year2, tonumber(input.month2));	-- year and month
  298. 		else
  299. 			date2 = string.format ('/%s', input.year2);							-- just year
  300. 		end
  301. 	end
  302. 	
  303. 	tCOinS_date.rftdate = date .. date2;										-- date2 has the '/' separator
  304. 	return;
  305. end
  306.  
  307.  
  308. --[[--------------------------< C H E C K _ D A T E >----------------------------------------------------------
  309.  
  310. Check date format to see that it is one of the formats approved by WP:DATESNO or WP:DATERANGE. Exception: only
  311. allowed range separator is endash.  Additionally, check the date to see that it is a real date: no 31 in 30-day
  312. months; no 29 February when not a leap year.  Months, both long-form and three character abbreviations, and seasons
  313. must be spelled correctly.  Future years beyond next year are not allowed.
  314.  
  315. If the date fails the format tests, this function returns false and does not return values for anchor_year and
  316. COinS_date.  When this happens, the date parameter is used in the COinS metadata and the CITEREF identifier gets
  317. its year from the year parameter if present otherwise CITEREF does not get a date value.
  318.  
  319. Inputs:
  320. 	date_string - date string from date-holding parameters (date, year, accessdate, embargo, archivedate, etc.)
  321.  
  322. Returns:
  323. 	false if date string is not a real date; else
  324. 	true, anchor_year, COinS_date
  325. 		anchor_year can be used in CITEREF anchors
  326. 		COinS_date is ISO 8601 format date; see make_COInS_date()
  327.  
  328. ]]
  329.  
  330. local function check_date (date_string, tCOinS_date)
  331. 	local year;			-- assume that year2, months, and days are not used;
  332. 	local year2=0;		-- second year in a year range
  333. 	local month=0;
  334. 	local month2=0;		-- second month in a month range
  335. 	local day=0;
  336. 	local day2=0;		-- second day in a day range
  337. 	local anchor_year;
  338. 	local coins_date;
  339.  
  340. 	if date_string:match("^%d%d%d%d%-%d%d?%-%d%d?$") then										-- year-initial numerical year month day format
  341. 		year, month, day=string.match(date_string, "(%d%d%d%d)%-(%d%d?)%-(%d%d?)");
  342. 		if 12 < tonumber(month) or 1 > tonumber(month) or 1583 > tonumber(year) then return false; end			-- month number not valid or not Gregorian calendar
  343. 		anchor_year = year;
  344.  
  345. 	elseif date_string:match("^%a+ +[1-9]%d?, +[1-9]%d%d%d%a?$") then						-- month-initial: month day, year
  346. 		month, day, anchor_year, year=string.match(date_string, "(%a+)%s*(%d%d?),%s*((%d%d%d%d)%a?)");
  347. 		month = get_month_number (month);
  348. 		if 0 == month then return false; end												-- return false if month text isn't one of the twelve months
  349. 				
  350. 	elseif date_string:match("^%a+ +[1-9]%d?–[1-9]%d?, +[1-9]%d%d%d%a?$") then				-- month-initial day range: month day–day, year; days are separated by endash
  351. 		month, day, day2, anchor_year, year=string.match(date_string, "(%a+) +(%d%d?)–(%d%d?), +((%d%d%d%d)%a?)");
  352. 		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;
  353. 		month = get_month_number (month);
  354. 		if 0 == month then return false; end												-- return false if month text isn't one of the twelve months
  355. 		month2=month;																		-- for metadata
  356. 		year2=year;
  357.  
  358. 	elseif date_string:match("^[1-9]%d? +%a+ +[1-9]%d%d%d%a?$") then						-- day-initial: day month year
  359. 		day, month, anchor_year, year=string.match(date_string, "(%d%d*)%s*(%a+)%s*((%d%d%d%d)%a?)");
  360. 		month = get_month_number (month);
  361. 		if 0 == month then return false; end												-- return false if month text isn't one of the twelve months
  362.  
  363. 	elseif date_string:match("^[1-9]%d?–[1-9]%d? +%a+ +[1-9]%d%d%d%a?$") then				-- day-range-initial: day–day month year; days are separated by endash
  364. 		day, day2, month, anchor_year, year=string.match(date_string, "(%d%d?)–(%d%d?) +(%a+) +((%d%d%d%d)%a?)");
  365. 		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;
  366. 		month = get_month_number (month);
  367. 		if 0 == month then return false; end												-- return false if month text isn't one of the twelve months
  368. 		month2=month;																		-- for metadata
  369. 		year2=year;
  370.  
  371. 	elseif date_string:match("^[1-9]%d? +%a+ – [1-9]%d? +%a+ +[1-9]%d%d%d%a?$") then		-- day initial month-day-range: day month - day month year; uses spaced endash
  372. 		day, month, day2, month2, anchor_year, year=date_string:match("(%d%d?) +(%a+) – (%d%d?) +(%a+) +((%d%d%d%d)%a?)");
  373. 		if (not is_valid_month_season_range(month, month2)) or not is_valid_year(year) then return false; end	-- date range order is left to right: earlier to later;
  374. 		month = get_month_number (month);													-- for metadata
  375. 		month2 = get_month_number (month2);
  376. 		year2=year;
  377.  
  378. 	elseif date_string:match("^%a+ +[1-9]%d? – %a+ +[1-9]%d?, +[1-9]%d%d%d?%a?$") then		-- month initial month-day-range: month day – month day, year;  uses spaced endash
  379. 		month, day, month2, day2, anchor_year, year=date_string:match("(%a+) +(%d%d?) – (%a+) +(%d%d?), +((%d%d%d%d)%a?)");
  380. 		if (not is_valid_month_season_range(month, month2)) or not is_valid_year(year) then return false; end
  381. 		month = get_month_number (month);													-- for metadata
  382. 		month2 = get_month_number (month2);
  383. 		year2=year;
  384.  
  385. 	elseif date_string:match("^[1-9]%d? +%a+ +[1-9]%d%d%d – [1-9]%d? +%a+ +[1-9]%d%d%d%a?$") then		-- day initial month-day-year-range: day month year - day month year; uses spaced endash
  386. 		day, month, year, day2, month2, anchor_year, year2=date_string:match("(%d%d?) +(%a+) +(%d%d%d%d?) – (%d%d?) +(%a+) +((%d%d%d%d?)%a?)");
  387. 		if tonumber(year2) <= tonumber(year) then return false; end												-- must be sequential years, left to right, earlier to later
  388. 		if not is_valid_year(year2) or not is_valid_month_range_style(month, month2) then return false; end		-- year2 no more than one year in the future; months same style
  389. 		month = get_month_number (month);																		-- for metadata
  390. 		month2 = get_month_number (month2);
  391.  
  392. 	elseif date_string:match("^%a+ +[1-9]%d?, +[1-9]%d%d%d – %a+ +[1-9]%d?, +[1-9]%d%d%d%a?$") then		-- month initial month-day-year-range: month day, year – month day, year;  uses spaced endash
  393. 		month, day, year, month2, day2, anchor_year, year2=date_string:match("(%a+) +(%d%d?), +(%d%d%d%d) – (%a+) +(%d%d?), +((%d%d%d%d)%a?)");
  394. 		if tonumber(year2) <= tonumber(year) then return false; end												-- must be sequential years, left to right, earlier to later
  395. 		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
  396. 		month = get_month_number (month);																		-- for metadata
  397. 		month2 = get_month_number (month2);
  398.  
  399. 	elseif date_string:match("^%a+ +[1-9]%d%d%d–%d%d%a?$") then								-- special case Winter/Summer year-year (YYYY-YY); year separated with unspaced endash
  400. 		local century;
  401. 		month, year, century, anchor_year, year2=date_string:match("(%a+) +((%d%d)%d%d)–((%d%d)%a?)");
  402. 		if 'Winter' ~= month and 'Summer' ~= month then return false end;					-- 'month' can only be Winter or Summer
  403. 		anchor_year=year..'–'..anchor_year;													-- assemble anchor_year from both years
  404. 		year2 = century..year2;																-- add the century to year2 for comparisons
  405. 		if 1 ~= tonumber(year2) - tonumber(year) then return false; end						-- must be sequential years, left to right, earlier to later
  406. 		if not is_valid_year(year2) then return false; end									-- no year farther in the future than next year
  407. 		month = get_season_number (month);
  408.  
  409. 	elseif date_string:match("^%a+ +[1-9]%d%d%d–[1-9]%d%d%d%a?$") then						-- special case Winter/Summer year-year; year separated with unspaced endash
  410. 		month, year, anchor_year, year2=date_string:match("(%a+) +(%d%d%d%d)–((%d%d%d%d)%a?)");
  411. 		if 'Winter' ~= month and 'Summer' ~= month then return false end;					-- 'month' can only be Winter or Summer
  412. 		anchor_year=year..'–'..anchor_year;													-- assemble anchor_year from both years
  413. 		if 1 ~= tonumber(year2) - tonumber(year) then return false; end						-- must be sequential years, left to right, earlier to later
  414. 		if not is_valid_year(year2) then return false; end									-- no year farther in the future than next year
  415. 		month = get_season_number (month);													-- for metadata
  416.  
  417. 	elseif date_string:match("^%a+ +[1-9]%d%d%d% – %a+ +[1-9]%d%d%d%a?$") then				-- month/season year - month/season year; separated by spaced endash
  418. 		month, year, month2, anchor_year, year2=date_string:match("(%a+) +(%d%d%d%d) – (%a+) +((%d%d%d%d)%a?)");
  419. 		anchor_year=year..'–'..anchor_year;													-- assemble anchor_year from both years
  420. 		if tonumber(year) >= tonumber(year2) then return false; end							-- left to right, earlier to later, not the same
  421. 		if not is_valid_year(year2) then return false; end									-- no year farther in the future than next year
  422. 		if 0 ~= get_month_number(month) and 0 ~= get_month_number(month2) and is_valid_month_range_style(month, month2) then 	-- both must be month year, same month style
  423. 			month = get_month_number(month);
  424. 			month2 = get_month_number(month2);
  425. 		elseif 0 ~= get_season_number(month) and 0 ~= get_season_number(month2) then		-- both must be or season year, not mixed
  426. 			month = get_season_number(month);
  427. 			month2 = get_season_number(month2);
  428. 		else
  429. 			 return false;
  430. 		end
  431.  
  432. 	elseif date_string:match ("^%a+–%a+ +[1-9]%d%d%d%a?$") then					-- month/season range year; months separated by endash 
  433. 		month, month2, anchor_year, year=date_string:match ("(%a+)–(%a+)%s*((%d%d%d%d)%a?)");
  434. 		if (not is_valid_month_season_range(month, month2)) or (not is_valid_year(year)) then return false; end
  435. 		if 0 ~= get_month_number(month) then									-- determined to be a valid range so just check this one to know if month or season
  436. 			month = get_month_number(month);
  437. 			month2 = get_month_number(month2);
  438. 		else
  439. 			month = get_season_number(month);
  440. 			month2 = get_season_number(month2);
  441. 		end
  442. 		year2=year;
  443. 		
  444. 	elseif date_string:match("^%a+ +%d%d%d%d%a?$") then							-- month/season year or proper-name year
  445. 		month, anchor_year, year=date_string:match("(%a+)%s*((%d%d%d%d)%a?)");
  446. 		if not is_valid_year(year) then return false; end
  447. 		if not is_valid_month_or_season (month) and 0 == is_proper_name (month) then return false; end
  448. 		if 0 ~= get_month_number(month) then									-- determined to be a valid range so just check this one to know if month or season
  449. 			month = get_month_number(month);
  450. 		elseif 0 ~= get_season_number(month) then
  451. 			month = get_season_number(month);
  452. 		else
  453. 			month = is_proper_name (month);										-- must be proper name; not supported in COinS
  454. 		end
  455.  
  456. 	elseif date_string:match("^[1-9]%d%d%d?–[1-9]%d%d%d?%a?$") then				-- Year range: YYY-YYY or YYY-YYYY or YYYY–YYYY; separated by unspaced endash; 100-9999
  457. 		year, anchor_year, year2=date_string:match("(%d%d%d%d?)–((%d%d%d%d?)%a?)");
  458. 		anchor_year=year..'–'..anchor_year;										-- assemble anchor year from both years
  459. 		if tonumber(year) >= tonumber(year2) then return false; end				-- left to right, earlier to later, not the same
  460. 		if not is_valid_year(year2) then return false; end						-- no year farther in the future than next year
  461.  
  462. 	elseif date_string:match("^[1-9]%d%d%d–%d%d%a?$") then						-- Year range: YYYY–YY; separated by unspaced endash
  463. 		local century;
  464. 		year, century, anchor_year, year2=date_string:match("((%d%d)%d%d)–((%d%d)%a?)");
  465. 		anchor_year=year..'–'..anchor_year;										-- assemble anchor year from both years
  466. 		if 13 > tonumber(year2) then return false; end							-- don't allow 2003-05 which might be May 2003
  467. 		year2 = century..year2;													-- add the century to year2 for comparisons
  468. 		if tonumber(year) >= tonumber(year2) then return false; end				-- left to right, earlier to later, not the same
  469. 		if not is_valid_year(year2) then return false; end						-- no year farther in the future than next year
  470.  
  471. 	elseif date_string:match("^[1-9]%d%d%d?%a?$") then							-- year; here accept either YYY or YYYY
  472. 		anchor_year, year=date_string:match("((%d%d%d%d?)%a?)");
  473. 		if false == is_valid_year(year) then
  474. 			return false;
  475. 		end
  476.  
  477. 	-- LOCAL: do not use mw.ustring: it allows full-width characters for %d.
  478. 	elseif date_string:match("^[1-9]%d%d%d年[1-9]%d?月[1-9]%d?日$") then						-- zh: year month day
  479. 		year, month, day=date_string:match("(%d%d%d%d)年(%d%d*月)(%d%d*)日");
  480. 		month = get_month_number (month);
  481. 		if 0 == month then return false; end
  482. 		anchor_year = year;
  483.  
  484. 	elseif date_string:match("^[1-9]%d%d%d年[1-9]%d?月$") then							-- zh: year month
  485. 		year, month=date_string:match("(%d%d%d%d)年(%d%d*月)");
  486. 		month = get_month_number (month);
  487. 		if 0 == month then return false; end
  488. 		anchor_year = year;
  489.  
  490. 	elseif date_string:match("^[1-9]%d%d%d?年$") then							-- zh: year; here accept either YYY or YYYY
  491. 		year=date_string:match("(%d%d%d%d?)年");
  492. 		if false == is_valid_year(year) then
  493. 			return false;
  494. 		end
  495. 		anchor_year = year;
  496.  
  497. 	elseif date_string:match("^%d%d%d%d%-%d%d$") then							-- numerical year month format
  498. 		year, month=date_string:match("(%d%d%d%d)%-(%d%d)");
  499. 		month=tonumber(month);
  500. 		if 12 < month or 1 > month or 1583 > tonumber(year) then return false; end			-- month number not valid or not Gregorian calendar
  501. 		anchor_year = year;
  502. 	-- END LOCAL
  503.  
  504. 	else
  505. 		return false;															-- date format not one of the MOS:DATE approved formats
  506. 	end
  507.  
  508. 	local result=true;															-- check whole dates for validity; assume true because not all dates will go through this test
  509. 	if 0 ~= year and 0 ~= month and 0 ~= day and 0 == year2 and 0 == month2 and 0 == day2 then		-- YMD (simple whole date)
  510. 		result=is_valid_date(year,month,day);
  511.  
  512. 	elseif 0 ~= year and 0 ~= month and 0 ~= day and 0 == year2 and 0 == month2 and 0 ~= day2 then	-- YMD-d (day range)
  513. 		result=is_valid_date(year,month,day);
  514. 		result=result and is_valid_date(year,month,day2);
  515.  
  516. 	elseif 0 ~= year and 0 ~= month and 0 ~= day and 0 == year2 and 0 ~= month2 and 0 ~= day2 then	-- YMD-md (day month range)
  517. 		result=is_valid_date(year,month,day);
  518. 		result=result and is_valid_date(year,month2,day2);
  519.  
  520. 	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)
  521. 		result=is_valid_date(year,month,day);
  522. 		result=result and is_valid_date(year2,month2,day2);
  523. 	end
  524. 	
  525. 	if false == result then return false; end
  526.  
  527. 	if nil ~= tCOinS_date then													-- this table only passed into this function when testing |date= parameter values
  528. 		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
  529. 	end
  530. 	
  531. 	return true, anchor_year;													-- format is good and date string represents a real date
  532. end	
  533.  
  534.  
  535. --[[--------------------------< D A T E S >--------------------------------------------------------------------
  536.  
  537. 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
  538. 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
  539. 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).
  540.  
  541. 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,
  542. a single error message is created as the dates are tested.
  543.  
  544. ]]
  545.  
  546. local function dates(date_parameters_list, tCOinS_date)
  547. 	local anchor_year;		-- will return as nil if the date being tested is not |date=
  548. 	local COinS_date;		-- will return as nil if the date being tested is not |date=
  549. 	local error_message = "";
  550. 	local good_date = false;
  551. 	
  552. 	for k, v in pairs(date_parameters_list) do									-- for each date-holding parameter in the list
  553. 		if is_set(v) then														-- if the parameter has a value
  554. 			if v:match("^c%. [1-9]%d%d%d?%a?$") then							-- special case for c. year or with or without CITEREF disambiguator - only |date= and |year=
  555. 				local year = v:match("c%. ([1-9]%d%d%d?)%a?");					-- get the year portion so it can be tested
  556. 				if 'date'==k then
  557. 					anchor_year, COinS_date = v:match("((c%. [1-9]%d%d%d?)%a?)");	-- anchor year and COinS_date only from |date= parameter
  558. 					good_date = is_valid_year(year);
  559. 				elseif 'year'==k then
  560. 					good_date = is_valid_year(year);
  561. 				end
  562. 			elseif 'date'==k then												-- if the parameter is |date=
  563. 				if v:match("^n%.d%.%a?") then									-- if |date=n.d. with or without a CITEREF disambiguator
  564. 					good_date, anchor_year, COinS_date = true, v:match("((n%.d%.)%a?)");	--"n.d."; no error when date parameter is set to no date
  565. 				elseif v:match("^nd%a?$") then									-- if |date=nd with or without a CITEREF disambiguator
  566. 					good_date, anchor_year, COinS_date = true, v:match("((nd)%a?)");	--"nd";	no error when date parameter is set to no date
  567. 				else
  568. 					good_date, anchor_year, COinS_date = check_date (v, tCOinS_date);	-- go test the date
  569. 				end
  570. 			elseif 'access-date'==k then										-- if the parameter is |date=
  571. 				good_date = check_date (v);										-- go test the date
  572. 				if true == good_date then										-- if the date is a valid date
  573. 					good_date = is_valid_accessdate (v);						-- is Wikipedia start date < accessdate < tomorrow's date?
  574. 				end
  575. 			else																-- any other date-holding parameter
  576. 				good_date = check_date (v);										-- go test the date
  577. 			end
  578. 			if false==good_date then											-- assemble one error message so we don't add the tracking category multiple times
  579. 				if is_set(error_message) then									-- once we've added the first portion of the error message ...
  580. 					error_message=error_message .. ", ";						-- ... add a comma space separator
  581. 				end
  582. 				error_message=error_message .. "&#124;" .. k .. "=";			-- add the failed parameter
  583. 			end
  584. 		end
  585. 	end
  586. 	return anchor_year, error_message;											-- and done
  587. end
  588.  
  589.  
  590. --[[--------------------------< Y E A R _ D A T E _ C H E C K >------------------------------------------------
  591.  
  592. Compare the value provided in |year= with the year value(s) provided in |date=.  This function returns a numeric value:
  593. 	0 - year value does not match the year value in date
  594. 	1 - (default) year value matches the year value in date or one of the year values when date contains two years
  595. 	2 - year value matches the year value in date when date is in the form YYYY-MM-DD and year is disambiguated (|year=YYYYx)
  596.  
  597. ]]
  598.  
  599. local function year_date_check (year_string, date_string)
  600. 	local year;
  601. 	local date1;
  602. 	local date2;
  603. 	local result = 1;															-- result of the test; assume that the test passes
  604. 	
  605. 	year = year_string:match ('(%d%d%d%d?)');
  606.  
  607. 	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 date and year required YYYY-MM-DD and YYYYx
  608. 		date1 = date_string:match ('(%d%d%d%d)');
  609. 		year = year_string:match ('(%d%d%d%d)');
  610. 		if year ~= date1 then
  611. 			result = 0;															-- years don't match
  612. 		else
  613. 			result = 2;															-- years match; but because disambiguated, don't add to maint cat
  614. 		end
  615. 		
  616. 	elseif date_string:match ("%d%d%d%d?.-%d%d%d%d?") then						-- any of the standard formats of date with two three- or four-digit years
  617. 		date1, date2 = date_string:match ("(%d%d%d%d?).-(%d%d%d%d?)");
  618. 		if year ~= date1 and year ~= date2 then
  619. 			result = 0;
  620. 		end
  621.  
  622. 	elseif date_string:match ("%d%d%d%d[%s%-–]+%d%d") then						-- YYYY-YY date ranges
  623. 		local century;
  624. 		date1, century, date2 = date_string:match ("((%d%d)%d%d)[%s%-–]+(%d%d)");
  625. 		date2 = century..date2;													-- convert YY to YYYY
  626. 		if year ~= date1 and year ~= date2 then
  627. 			result = 0;
  628. 		end
  629.  
  630. 	elseif date_string:match ("%d%d%d%d?") then									-- any of the standard formats of date with one year
  631. 		date1 = date_string:match ("(%d%d%d%d?)");
  632. 		if year ~= date1 then
  633. 			result = 0;
  634. 		end
  635. 	end
  636. 	return result;
  637. end
  638.  
  639. return {dates = dates, year_date_check = year_date_check}						-- return exported functions
取自“https://moegirl.uk/index.php?title=Module:Citation/CS1/Date_validation&oldid=203080”