Module:Calendar widget

--[[ Module to create Calendar widget

--]] require('strict'); local getArgs = require ('Module:Arguments').getArgs;

local lang_obj = mw.language.getContentLanguage;

local daysinmonth = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31} local dayname = {'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'} local dayabbr = {} for i, v in ipairs(dayname) do	dayabbr[i] = v:sub(1, 2) end

local iso_dayname = {'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'} local iso_dayabbr = {} for i, v in ipairs(iso_dayname) do	iso_dayabbr[i] = v:sub(1, 2) end

local monthname = {} local monthabbr = {} if 0 == #monthname then for m = 1, 12 do monthname[m] = lang_obj:formatDate ("F", '2019-' .. m);					-- table of long month names monthabbr[m] = lang_obj:formatDate ("M", '2019-' .. m);					-- table of abbreviated month names end end

--[[--< I S _ L E A P >

returns true when is a leapyear

]]

local function is_leap (year) return '1' == lang_obj:formatDate ('L', tostring(year)); end

--[[--< D A Y _ O F _ W E E K >

returns 1 to 7; 1 == Sunday; 1 == Monday when iso true

]]

local function day_of_week (year, month, day, iso) return iso and lang_obj:formatDate ('N', year .. '-' .. month .. '-' .. day) or	-- ISO: 1 = monday lang_obj:formatDate ('w', year .. '-' .. month .. '-' .. day) + 1;			-- 1 = sunday end

--[[--< I S _ S E T >--

Returns true if argument is set; false otherwise. Argument is 'set' when it exists (not nil) or when it is not an empty string.

]]

local function is_set( var ) return not (var == nil or var == ''); end

--[=[-< M A K E _ W I K I L I N K >

Makes a wikilink; when both link and display text is provided, returns a wikilink in the form L|D; if only link is provided, returns a wikilink in the form L; if neither are provided or link is omitted, returns an empty string.

]=]

local function make_wikilink (link, display) if is_set (link) then if is_set (display) then return table.concat ({, display, }); else return table.concat ({, link, }); end else return ''; end end

--[[--< G E T _ D I S P L A Y _ Y E A R >--

returns year from props with prefixed and suffixed wikilink if appropriate; this function used for both yearly and stand-alone calendars

]]

local function get_display_year (props) local year_text = props.year; local lk_prefix = props.lk_pref_y or props.lk_pref; local lk_suffix = props.lk_suff_y or props.lk_suff;

if props.lk_y then															-- if to be linked if lk_prefix or lk_suffix then											-- when prefix or suffix, label year_text = make_wikilink ((lk_prefix or ) .. year_text .. (lk_suffix or ), year_text); else year_text = make_wikilink (year_text);								-- just year end end return year_text; end

--[[--< G E T _ D I S P L A Y _ M O N T H >

returns month from argument or props with wikilink, prefix, suffix ...

argument mnum is nil when rendering stand-alone calendar

]]

local function get_display_month (mnum, props) local month_text = mnum or props.month_num; month_text = monthname[month_text];

local lk_prefix = props.lk_pref_m or props.lk_pref; local lk_suffix = props.lk_suff_m or props.lk_suff;

if props['lk_m&y'] then														-- stand-alone month calendars only month_text = month_text .. ' ' .. props.year;							-- composite month and year link end

if props.lk_m or props['lk_m&y'] then if lk_prefix or lk_suffix then											-- when prefix or suffix, label month_text = make_wikilink ((lk_prefix or ) .. month_text .. (lk_suffix or ), month_text); else month_text = make_wikilink (month_text);							-- just month name or composite month/year end end return month_text; end

--[[--< G E T _ D I S P L A Y _ D A Y >

returns day with wikilink (month and day), link prefix, link suffix ... (text doesn't get prefix / suffix)

]]

local function get_display_day (day_text, mnum, props) local lk_prefix = props.lk_pref_d or props.lk_pref; local lk_suffix = props.lk_suff_d or props.lk_suff;

if props.lk_d then local link_text = (lk_prefix or '') .. monthname[mnum] .. ' ' .. day_text .. (lk_suffix or ''); day_text = make_wikilink (link_text, day_text); end return day_text; end

--[[--< R E P E A T _ T A G S >

create ... ... string to be included into another tag as :wikitext(...)

items is a table of items, each of which will be wrapped in ... options is a table of optional class, css, and attribute settings for these tags options.attr is a table of attribute / value pairs: {['attribute'] = 'value', ...} options.css is a table of attribute / value pairs: {['attribute'] = 'value', ...}

]]

local function repeat_tags (tag, items, options) local tags = {};															-- table of ... tag strings local opt_attr = options.attr or {};										-- if options not supplied, use empty table local css_opts = options.css or {}; for i, item in ipairs (items) do		local repeat_tag = mw.html.create (tag);								-- new td object repeat_tag :addClass (options.class) :attr (opt_attr) :css (css_opts) :wikitext (item)													-- the item to be wrapped in ... 			:done																-- close table.insert (tags, tostring (repeat_tag));								-- make a string of this object end

return table.concat (tags);													-- concatenate them all together end

--[[--< G E T _ R O W _ D A T E S >

gets a week (row) of calendar dates each in its own ... ; inserts iso week number tag ahead of column 1 when props.iso_wk true.

]]

local function get_row_dates (firstday, mnum, row, props) local options = {['class']='mcal'};											-- table of otions for these td tags local td_items = {};														-- table of ... tag strings local result = {}; local hilite; local hilite_two; for col = 1, 7 do		local dom = 7 * (row-1) + col + 1 - firstday							-- calculate day of month for row/col position local day; if props.iso_wk and 1 == col then										-- when column 1, insert iso week number ahead of first 'dom' local iso_wk = lang_obj:formatDate ('W', props.year .. '-' .. mnum .. '-' .. ((1 > dom) and 1 or dom)); local css_opts = props.wknum_color and {['background'] = props.wknum_color} or {}; table.insert (result, repeat_tags ('td', {iso_wk}, {['class']='mcal_iso', ['css'] = css_opts})); end if dom daysinmonth[mnum] then day = " "														-- before or after month, blank cell else day = get_display_day (dom, mnum, props);							-- make wikilinks from month and day if required end

if props.today then														-- highlight today's date when displayed if (props.year == props.this_ynum) and (mnum == props.this_mnum) and (dom == props.this_dnum) then hilite = col; end end if props.aday then														-- highlight arbitrary date when displayed if (props.year == props.this_ynum) and (mnum == props.this_mnum) and (dom == props.this_dnum) then hilite_two = col; end end table.insert (td_items, day); end

for i, td_item in ipairs (td_items) do		if i == hilite then table.insert (result, repeat_tags ('td', {td_item}, {['class']='mcal', ['css'] = {['background-color'] = props.today_color or '#cfc'}})); else if i == hilite_two then table.insert (result, repeat_tags ('td', {td_item}, {['class']='mcal', ['css'] = {['background-color'] = props.aday_color or '#cfc'}})); end table.insert (result, repeat_tags ('td', {td_item}, options)); end end

return table.concat (result); end

--[[--< G E T _ W E E K _ D A Y _ H D R >--

create header row of day-of-week abbreviations with title attributes

]]

local function get_week_day_hdr (props) local headers = {}; local css_opts = props.week_color and {['background'] = props.week_color} or {}

if props.iso_wk or props.iso then if props.iso_wk then table.insert (headers, repeat_tags ('th', {'Wk'}, {['class']='mcal', ['attr']={['title'] = 'ISO week number'}, ['css'] = css_opts}));			-- iso week header end for i, abbr in ipairs (iso_dayabbr) do			table.insert (headers, repeat_tags ('th', {iso_dayabbr[i]}, {['class']='mcal', ['attr']={['title'] = iso_dayname[i]}, ['css'] = css_opts})); end else for i, abbr in ipairs (dayabbr) do			table.insert (headers, repeat_tags ('th', {dayabbr[i]}, {['class']='mcal', ['attr']={['title'] = dayname[i]}, ['css'] = css_opts})); end end

return table.concat (headers); end

--[[--< G E T _ M O N T H _ H D R >

create main header row for month calendars, with or without year and with or without previous / next links

]]

local function get_month_hdr (mnum, props) local result = {}; local prev = ''; local next = ''; local hdr_year = ''; local col_span = (props.iso_wk and 8) or 7;									-- assume no prev/next

if not props.hide_year and props.month_num then								-- props.month_num has value only for stand-alone month calendars hdr_year = get_display_year (props);									-- if to be shown, add wikilink, etc when required end

if props.prevnext then prev = monthname[(0 < mnum-1) and mnum-1 or 12]; next = monthname[(13 > mnum+1) and mnum+1 or 1];

if is_set (hdr_year) then prev = prev .. ' ' .. ((0 < mnum-1) and hdr_year or hdr_year-1);	-- january-1 = december previous year next = next .. ' ' .. ((13 > mnum+1) and hdr_year or hdr_year+1);	-- december+1 = january next year end local link_text = (props.lk_pref_mprev or '') .. prev .. (props.lk_suff_mprev or '') prev = make_wikilink (link_text, '<<'); link_text = (props.lk_pref_mnext or '') .. next .. (props.lk_suff_mnext or '') next = make_wikilink (link_text, '>>');

table.insert (result, repeat_tags ('td', {prev}, {['css']={['text-align']='center'}}));	-- insert prev now, insert next later col_span = col_span - 2;												-- narrow the month year end

if props['lk_m&y'] then														-- for composite links table.insert (result, repeat_tags ('th', {get_display_month (mnum, props)}, {['class']='mcal', ['attr']={['colspan']=col_span}})); else table.insert (result, repeat_tags ('th', {get_display_month (mnum, props) .. ' ' .. hdr_year}, {['class']='mcal', ['attr']={['colspan']=col_span}})); end

if props.prevnext then table.insert (result, repeat_tags ('td', {next}, {['css']={['text-align']='center'}})); end

return table.concat (result); end

--[[--< D I S P L A Y M O N T H >--

generate the html to display a month calendar

]]

local function display_month (mnum, props) if props.leap then daysinmonth[2] = 29 end local firstday = day_of_week (props.year, mnum, 1, props.iso);				-- get first day number of the first day of the month; 1 == Sunday

local table_css = {}; if props.m_center then table_css = {															-- TODO: make a separate class in styles.css? ['clear'] = 'both', ['margin-left'] = 'auto', ['margin-right'] = 'auto', }	end if props.month_num then														-- month_num only set when doing stand-alone month calendars table_css.border = '1px solid grey';									-- put this is styles.css as a separate class? end local month_cal = mw.html.create ('table'); month_cal :addClass ('mcal' .. (props.m_float_r and ' floatright' or ''))			-- float table right; leading space required to separate classes :css (table_css) :tag ('tr')																-- for month name header :addClass ('mcalhdr') :css (props.title_color and {['background'] = props.title_color} or {}) :wikitext (get_month_hdr (mnum, props)) :done																-- close :tag ('tr')																-- for weekday header :addClass ('mcalhdr') :wikitext (get_week_day_hdr (props)) :done																-- close

local numrows = math.ceil ((firstday + daysinmonth[mnum] - 1) / 7);			-- calculate number of rows needed for this calendar for row = 1, numrows do		month_cal :tag ('tr')															-- for this week :addClass ('mcal') :wikitext (get_row_dates (firstday, mnum, row, props));				-- get dates for this week end month_cal:done															-- close --mw.log (tostring (month_cal)) return tostring (month_cal) end

--[[--< G E T _ R O W _ C A L E N D A R S >

create ... ... string to be included into ... as :wikitext(...)

]]

local function get_row_calendars (cols, row_num, props) local mnum;																	-- month number local options = {['class']='ycal'};											-- table of otions for these td tags local td_items = {};														-- table of ... tag strings for col_num = 1, cols do		mnum = cols * (row_num - 1) + col_num									-- calculate month number from row and column values if mnum < 13 then														-- some sort of error return if ever 13+? table.insert (td_items, display_month (mnum, props));				-- get a calendar for month number mnum end end

return repeat_tags ('td', td_items, options) end

--[[--< G E T _ Y E A R _ H E A D E R >

create html header for yearly calendar;

]]

local function get_year_header (props) local css_opts = {}; if props.hide_year then														-- for accesibility, when |hide_year=yes css_opts['display'] = 'none';											-- use css to hide the year header (but not when |title= has a value) end local header = mw.html.create('tr'); header :addClass ('ycalhdr') :tag ('th') :addClass ('ycal') :css(css_opts) :attr ('colspan', props.cols) :wikitext (props.title or get_display_year (props));				-- return tostring (header) end

--[[--< D I S P L A Y _ Y E A R >--

create a twelve-month calendar; default is 4 columns × 3 rows

]]

local function display_year(props) local year = props.year local cols = props.cols local rows = math.ceil (12 / cols); local mnum; local year_cal = mw.html.create('table'); year_cal :addClass ('ycal' .. (props.y_float_r and ' floatright' or ''))			-- float table right; leading space required to separate classes :css (props.y_center and {['clear'] = 'both', ['margin-left'] = 'auto', ['margin-right'] = 'auto'} or {})	-- centers table; TODO: add to styles.css? :wikitext (get_year_header(props));										-- get year header if not hidden

for row_num = 1, rows do		year_cal :tag('tr') :addClass ('ycal') :wikitext(get_row_calendars (cols, row_num, props))					-- get calendars for this row each wrapped in ... tags as wikitext for this ... 	end year_cal:done																-- close --mw.log (tostring (year_cal)) return tostring (year_cal) end

--[[--< _ C A L E N D A R >

module entry point. args is the parent frame args table

]]

local function _calendar (args) local props = {};															-- separate calendar properties table to preserve arguments as originally provided local this_year_num = tonumber (lang_obj:formatDate ('Y')); local this_month_num = tonumber (lang_obj:formatDate ('n'));

props.this_ynum = this_year_num;											-- for highlighting 'today' in a calendar display props.this_mnum = this_month_num; props.this_dnum = tonumber (lang_obj:formatDate ('j'));

props.year = args.year and tonumber(args.year) or this_year_num; if (1583 > props.year) or (1582 == props.year and 10 > props.month_num) then	-- gregorian calendar only (1583 for yearly calendar because gregorian started in October of 1582) props.year = this_year_num;												-- so use this year end

props.leap = is_leap (props.year) props.title = args.title;													-- year calendar title

props.cols = tonumber(args.cols or 4);										-- yearly calendar number of columns if 1 > props.cols or 12 < props.cols then props.cols = 4; end if args.month then local mnum = tonumber(args.month) if not mnum then														-- month provided as some sort of text string if args.month == "current" then props.month_num = this_month_num props.year = this_year_num elseif args.month == "last" then mnum = this_month_num - 1 if mnum == 0 then props.month_num = 12										-- december last year props.year = this_year_num - 1								-- last year else props.month_num = mnum;										-- previous month end elseif args.month == "next" then mnum = this_month_num + 1 if mnum == 13 then props.month_num = 1											-- january next year props.year = this_year_num + 1								-- next year else props.month_num = mnum;										-- next month end else local good good, props.month_num = pcall (lang_obj.formatDate, lang_obj, 'n', args.month); if not good then props.month_num = this_month_num else props.month_num = tonumber (props.month_num) end end else props.month_num = (13 > mnum and 0 < mnum) and mnum or this_month_num;	-- month provided as a number end

props.prevnext = 'yes' == (args.prevnext and args.prevnext:lower);	-- show previous / next links in month header only in single month calendars

if args.lk_pref_mprev or args.lk_suff_mprev then props.lk_pref_mprev = args.lk_pref_mprev; props.lk_suff_mprev = args.lk_suff_mprev; props.prevnext = true; end

if args.lk_pref_mnext or args.lk_suff_mnext then props.lk_pref_mnext = args.lk_pref_mnext; props.lk_suff_mnext = args.lk_suff_mnext; props.prevnext = true; end

props.m_center = 'center' == (args.float and args.float:lower);		-- month calendar positions; default is left props.m_float_r = 'right' == (args.float and args.float:lower); end props.iso_wk = 'yes' == (args.iso_wk and args.iso_wk:lower);				-- show iso format with week numbers when true props.iso = 'yes' == (args.iso and args.iso:lower) or props.iso_wk;		-- iso format without week number unless props.iso_wk true; always true when props.iso_wk true args.lk = args.lk and args.lk:lower; if args.lk and ({['yes']=1, ['m&y']=1, ['dm&y']=1, ['dm']=1, ['my']=1, ['dy']=1, ['d']=1, ['m']=1, ['y']=1})[args.lk] then	-- if valid keywords if 'yes' == args.lk then												-- all date components are individually linked props.lk_d = true; props.lk_m = true; props.lk_y = true; elseif 'm&y' == args.lk and props.month_num then						-- stand-alone month calendars only; month and year as a single composite link props['lk_m&y'] = true; elseif 'dm&y' == args.lk and props.month_num then						-- stand-alone month calendars only; month and year as a single composite link props['lk_m&y'] = true; props.lk_d = true; else props.lk_d = 'd' == args.lk:match ('d');							-- decode the keywords to know which components are to be linked props.lk_m = 'm' == args.lk:match ('m'); props.lk_y = 'y' == args.lk:match ('y'); end end

if not (props.title or props.lk_y or props['lk_m&y']) then props.hide_year = ('yes' == args.hide_year) or ('off' == args.show_year);	-- year normally displayed; this hides year display but not when linked or replaced with title end

props.lk_pref = args.lk_pref;												-- prefix for all links except previous and next props.lk_suff = args.lk_suff;												-- suffix for all links except previous and next

for _, v in ipairs ({'y', 'm', 'd'}) do										-- loop through calendar parts for link prefix and suffix parameters props['lk_pref_' .. v] = args['lk_pref_' .. v] or args.lk_pref;			-- set prefix values props['lk_suff_' .. v] = args['lk_suff_' .. v] or args.lk_suff;			-- set suffix values if props['lk_pref_' .. v] or props['lk_suff_' .. v] then				-- set the calendar link flags as necessary props['lk_' .. v] = true; end end if not (props.m_center or props.m_float_r) then								-- these may aleady be set for stand-alone month calendar props.y_center = 'center' == (args.float and args.float:lower); props.y_float_r = 'right' == (args.float and args.float:lower); end

props.today = 'yes' == (args.show_today and args.show_today:lower);		-- highlight today's date in calendars where it is displayed props.today_color = args.today_color or args.today_colour; props.aday = 'yes' == (args.show_a_day and args.show_a_day:lower);		-- highlight arbitrary date in calendars where it is displayed props.aday_color = args.a_day_color or args.a_day_colour; props.title_color = args.title_color or args.title_colour or args.color or args.colour; props.week_color = args.week_color or args.week_colour or args.color or args.colour; props.wknum_color = args.wknum_color or args.wknum_colour; -- TODO: add all other args{} from template or invoke to props{} modified as appropriate

if props.month_num then														-- set only when rendering stand-alone month calendar return display_month (props.month_num, props); else return display_year (props); end end

--[[--< C A L E N D A R >--

template entry point. All parameters are template parameters; there are no special invoke parameters

]]

local function calendar (frame) local args=getArgs (frame); return _calendar (args); end

----< E X P O R T E D  F U N C T I O N S >--

return { calendar = calendar, }