Module:Sandbox/N3rsti/Dates Explained

local p =

local date_words =

-- Detect day, month, year and formatfunction detect_date(date_text) -- Variables setup local date_sign = "[^%s]+" local sign = "" local date_table = if string.match(date_text, "%-") then date_sign = "[^%-]+" elseif string.match(date_text, "%/") then date_sign = "[^%/]+" end for word in string.gmatch(date_text, date_sign) do table.insert(date_table, word) end local index= for k,v in pairs(date_table) do index[v]=k end -- Date detection if date_sign

"[^%/]+" then sign = "/" elseif date_sign

"[^%-]+" then sign = "-" end if date_sign

"[^%/]+" or date_sign

"[^%-]+" then day, month, year = string.match(date_text, "(%d+)".. sign .. "(%d+)" .. sign .. "(%d+)") if #day > 2 then return end return

else for _, ending in pairs(date_words.number_endings) do day, month, year = string.match(date_text, "(%d+)" .. ending .. " (%w+) (%d+)") if day then return end day, month, year = string.match(date_text, "(%d+) (%w+) (%d+)") if day then return end break end end for month=1, #date_words.months do if string.match(string.lower(date_text), date_words.months[month]) or string.match(string.lower(date_text), date_words.short_months[month]) then local selected_month = date_words.months[month] local month_index = index[selected_month] -- Gets index of month name if string.match(date_text, ",") then month, day, year = string.match(date_text, "(%w+) (%d+), (%d+)") else day, month, year = string.match(date_text, "(%d+) (%w+) (%d+)") -- Month is nil when pattern didn't work so there are 2 options in this case: dmy or my if not month then for _, ending in pairs(date_words.number_endings) do day, month, year = string.match(date_text, "(%d+)" .. ending .. "(%w+) (%d+)") if day then return end break end month, year = string.match(date_text, "(%w+) (%d+)") if not month then day, month = string.match(date_text, "(%d+) (%w+)") month = month:gsub("^%l", string.upper) return end month = month:gsub("^%l", string.upper) return end end month = month:gsub("^%l", string.upper) return end end day, month, year = string.match(date_text, "(%d+) (%w+) (%d+)") if day then return end end

-- Formatting date functionfunction p.format_date(frame) local date_format = frame.args.format or "" local date_text = frame.args.date or "" local circa_message, out, date_ending = "" local is_valid = false if date_text

"" then return "No parameter supplied" end local date_sign = "[^%s]+" local sign = "" local date_table = if string.match(date_text, "%-") then date_sign = "[^%-]+" elseif string.match(date_text, "%/") then date_sign = "[^%/]+" end for word in string.gmatch(date_text, date_sign) do table.insert(date_table, word) end for _, ending in pairs(date_words.accepted_endings) do if string.match(date_text, ending) then is_valid = true date_ending = ending break end end date_ending = date_ending or "" for month_num=1, #date_words.months do if string.match(string.lower(date_text), date_words.months[month_num]) or string.match(string.lower(date_text), date_words.short_months[month_num]) then is_valid = true month = date_words.months[month_num] break end end for _, ending in pairs(date_words.number_endings) do if string.sub(string.lower(date_text), #ending)

ending then is_valid = true break end end for _, message in pairs(date_words.circa_words) do if string.match(string.lower(date_text), message) then circa_message = "circa " is_valid = true end end

for _, word in pairs(date_words.accepted_words) do if string.match(string.lower(date_text), word) then is_valid = true end end

if detect_date(date_text) and (detect_date(date_text).sign

"/" or detect_date(date_text).sign

"-") and date_format

"" then date_format = "iso" end if date_format

"iso" then local month = detect_date(date_text).month if not tonumber(month) then local index= for k,v in pairs(date_words.months) do index[v]=k end month = index[string.lower(month)] local months_days = date_words.months_days[month] end local months_days = date_words.months_days[month] local day = detect_date(date_text).day or "" return circa_message .. (detect_date(date_text).year .. "-" .. month .."-" .. day) .. " " .. date_ending elseif date_format

"mdy" then local month = detect_date(date_text).month local month_num = month if not tonumber(month) then local index= for k,v in pairs(date_words.months) do index[v]=k end month_num = index[string.lower(month)] else month = date_words.months[tonumber(month_num)] end months_days = date_words.months_days[tonumber(month_num)] if tonumber(detect_date(date_text).year) % 4

0 then months_days = months_days + 1 end if months_days < tonumber(detect_date(date_text).day) then return "Invalid entry" end month = month:gsub("^%l", string.upper) return circa_message .. (month .. " " .. detect_date(date_text).day ..", " .. detect_date(date_text).year) .. " " .. date_ending elseif date_format

"year" then return circa_message .. detect_date(date_text).year .. " " .. date_ending end local is_number = true if not is_valid then for _, date_word in pairs(date_table) do if not tonumber(date_word) then is_number = false break end end end if not is_valid and tonumber(date_text) then return date_text elseif is_number then local day, month, year, ending = string.match(date_text, "(%d+) (%w+) (%d+)") if month then for counter, short_month in pairs(date_words.short_months) do for _, word in pairs(date_table) do if string.lower(word)

short_month then selected_month = date_words.months[counter] break end end end if selected_month then month_capitalize = selected_month:gsub("^%l", string.upper) date_text = string.gsub(date_text, month, month_capitalize) else month_capitalize = month:gsub("^%l", string.upper) date_text = string.gsub(date_text, month, month_capitalize) end return circa_message .. date_text end for _, word in pairs(date_table) do for _, num_ending in pairs(date_words.number_endings) do if string.match(word, "(%d+)" .. num_ending) then day = string.gsub(word, num_ending, "") break end end end for month_num=1, #date_words.months do if string.match(string.lower(date_text), date_words.months[month_num]) or string.match(string.lower(date_text), date_words.short_months[month_num]) then is_valid = true month = date_words.months[month_num] break end end month = month or "" month = month:gsub("^%l", string.upper) _, year = string.match(date_text, "(.+) (%d+)") year = year or "" day = day or date_text if year

month then month = "" end day_table = for word in string.gmatch(day, date_sign) do table.insert(day_table, word) end day_table[1] = day_table[1] or "" return circa_message .. day_table[1] .. " " .. month .. " " .. year .. " " .. date_ending end if not is_valid then return "Invalid entry" endend

return p