Module:Infobox/dates

local getArgs = require('Module:Arguments').getArgs

local default_error_category = ""

local p = {}

function p.start_end_date_template_validation(frame) local args = getArgs(frame) local error_category = args.error_category or default_error_category

local start_date = args.first_aired or args.released or args.airdate or args.release_date if start_date then if not start_date:find("dtstart") then return error_category end end

local end_date = args.last_aired if end_date then if not end_date:find("dtend") and end_date ~= "present" then return error_category end end end

function p.dates(frame) local returnval local args = getArgs(frame) if table.getn(args) < 2 then if args['1'] == nil and args['2'] == nil then return '' elseif args['1'] == nil then return args['2'] elseif args['2'] == nil then return args['1'] end end args['1'] = args['1']:gsub(" "," ") args['2'] = args['2']:gsub(" "," ") local dmy = false local pr1, m1, d1, y1, su1 = string.match(args['1'], '(.-)(%u%a+)%s(%d+),%s(%d+)(.*)') local pr2, m2, d2, y2, su2 = string.match(args['2'], '(.-)(%u%a+)%s(%d+),%s(%d+)(.*)') if y1 == nil then dmy = true pr1, d1, m1, y1, su1 = string.match(args['1'], '(.-)(%d%d?)%s(%a+)%s(%d+)(.*)') pr2, d2, m2, y2, su2 = string.match(args['2'], '(.-)(%d%d?)%s(%a+)%s(%d+)(.*)') end local dash = ' – '	if y1 ~= nil and y2 ~= nil then su1 = su1 or '' su2 = su2 or '' local 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} local diff = os.time({year=y2, month=MONTHS[m2], day=d2, hour=0, min=0, sec=0}) - os.time({year=y1, month=MONTHS[m1], day=d1, hour=0, min=0, sec=0}) if diff < 0 then returnval = 'Invalid date range' else if y1 == y2 then if dmy == false then returnval = pr1 .. m1 .. ' ' .. d1 .. su1 .. dash .. pr2 .. m2 ..' '.. d2 ..', '.. y2 .. su2 else returnval = pr1 .. d1 .. ' ' .. m1 .. su1 .. dash .. pr2 .. d2 .. ' ' .. m2 .. ' ' .. y2 .. su2 end else if dmy == false then returnval = pr1 .. m1 .. ' ' .. d1 ..', '.. y1 .. su1 .. dash .. pr2 .. m2 .. ' '.. d2 .. ', ' .. y2 .. su2 else returnval = pr1 .. d1 .. ' ' .. m1 ..' '.. y1 .. su1 .. dash .. pr2 .. d2 .. ' '.. m2 .. ' ' .. y2 .. su2 end end end else returnval = args['1']..dash..args['2']; end return returnval; end

return p