Module:Webarchive

--[[ --

Lua module implementing the template.

A merger of the functionality of three templates:, and ]]

local p = {}

--[[--< inlineError >---

Critical error. Render output completely in red. Add to tracking category.

]]

local function inlineError(arg, msg)

track["Category:Webarchive template errors"] = 1 return ' Error in webarchive template: Check  value. ' .. msg .. ' '

end

--[[--< inlineRed >---

Render a text fragment in red, such as a warning as part of the final output. Add tracking category.

]]

local function inlineRed(msg, trackmsg)

if trackmsg == "warning" then track["Category:Webarchive template warnings"] = 1 elseif trackmsg == "error" then track["Category:Webarchive template errors"] = 1 end

return ' ' .. msg .. ' '

end

--[[--< trimArg >---

trimArg returns nil if arg is "" while trimArg2 returns 'true' if arg is "" trimArg2 is for args that might accept an empty value, as an on/off switch like nolink=

]]

local function trimArg(arg) if arg == "" or arg == nil then return nil else return mw.text.trim(arg) end end local function trimArg2(arg) if arg == nil then return nil else return mw.text.trim(arg) end end

--[[-- ---

Convert base-62 to base-10 Credit: https://de.wikipedia.org/wiki/Modul:Expr

]]

local function base62( value )

local r = 1

if value:match( "^%w+$" ) then local n = #value local k = 1 local c       r = 0 for i = n, 1, -1 do           c = value:byte( i, i ) if c >= 48 and  c <= 57 then c = c - 48 elseif c >= 65 and  c <= 90 then c = c - 55 elseif c >= 97 and  c <= 122 then c = c - 61 else   -- How comes? r = 1 break   -- for i            end r = r + c * k           k = k * 62 end -- for i   end return r end

--[[--< tableLength >---

Given a 1-D table, return number of elements

]]

local function tableLength(T) local count = 0 for _ in pairs(T) do count = count + 1 end return count end

--[[--< dateFormat >---

Given a date string, return its format: dmy, mdy, iso, ymd If unable to determine return nil

]]

local function dateFormat(date)

local dt = {} dt.split = {}

dt.split = mw.text.split(date, "-") if tableLength(dt.split) == 3 then if tonumber(dt.split[1]) > 1900 and tonumber(dt.split[1]) < 2200 and tonumber(dt.split[2]) and tonumber(dt.split[3]) then return "iso" else return nil end end

dt.split = mw.text.split(date, " ") if tableLength(dt.split) == 3 then if tonumber(dt.split[3]) then if tonumber(dt.split[3]) > 1900 and tonumber(dt.split[3]) < 2200 then if tonumber(dt.split[1]) then return "dmy" else return "mdy" end else if tonumber(dt.split[1]) then if tonumber(dt.split[1]) > 1900 and tonumber(dt.split[1]) < 2200 then return "ymd" end end end end end return nil

end

--[[--< makeDate >---

Given a zero-padded 4-digit year, 2-digit month and 2-digit day, return a full date in df format df = mdy, dmy, iso, ymd

]]

local function makeDate(year, month, day, df)

if not year or year == "" or not month or month == "" or not day or day == "" then return nil end

local zmonth = month                                                     -- month with leading 0 month = month:match("0*(%d+)")                                           -- month without leading 0 if tonumber(month) < 1 or tonumber(month) > 12 then return year end local nmonth = os.date("%B", os.time{year=2000, month=month, day=1} )    -- month in name form if not nmonth then return year end

local zday = day day = zday:match("0*(%d+)") if tonumber(day) < 1 or tonumber(day) > 31 then if df == "mdy" or df == "dmy" then return nmonth .. " " .. year elseif df == "iso" then return year .. "-" .. zmonth elseif df == "ymd" then return year .. " " .. nmonth else return nmonth .. " " .. year end end

if df == "mdy" then return nmonth .. " " .. day .. ", " .. year        -- September 1, 2016 elseif df == "dmy" then return day .. " " .. nmonth .. " " .. year         -- 1 September 2016 elseif df == "iso" then return year .. "-" .. zmonth .. "-" .. zday        -- 2016-09-01 elseif df == "ymd" then return year .. " " .. nmonth .. " " .. cday         -- 2016 September 1 else return nmonth .. " " .. day .. ", " .. year        -- September 1, 2016 end

end

--[[--< decodeWebciteDate >---

Given a URI-path to Webcite (eg. /67xHmVFWP) return the encoded date in df format

]] local function decodeWebciteDate(path, df)

local dt = {} dt.split = {}

dt.split = mw.text.split(path, "/")

-- valid URL formats that are not base62 -- http://www.webcitation.org/query?id=1138911916587475 -- http://www.webcitation.org/1138911916587475 -- http://www.webcitation.org/cache/73e53dd1f16cf8c5da298418d2a6e452870cf50e if dt.split[2] == "query" or dt.split[2] == "cache" or tonumber(dt.split[2]) then return "query" end

dt.full = os.date("%Y %m %d", string.sub(string.format("%d", base62(dt.split[2])),1,10) ) dt.split = mw.text.split(dt.full, " ") dt.year = dt.split[1] dt.month = dt.split[2] dt.day = dt.split[3]

if not tonumber(dt.year) or not tonumber(dt.month) or not tonumber(dt.day) then return inlineRed("[Date error] (1)", "error") end

if tonumber(dt.month) > 12 or tonumber(dt.day) > 31 or tonumber(dt.month) < 1 then return inlineRed("[Date error] (2)", "error") end if tonumber(dt.year) > tonumber(os.date("%Y")) or tonumber(dt.year) < 1900 then return inlineRed("[Date error] (3)", "error") end

fulldate = makeDate(dt.year, dt.month, dt.day, df) if not fulldate then return inlineRed("[Date error] (4)", "error") else return fulldate end

end

--[[--< snapDateToString >---

Given a URI-path to Wayback (eg. /web/20160901010101/http://example.com ) return the formatted date eg. "September 1, 2016" in df format Handle non-digits in snapshot ID such as "re_" and "-" and "*"

]]

local function decodeWaybackDate(path, df)

local snapdate, snapdatelong, currdate, fulldate

local safe = path snapdate = string.gsub(safe, "^/w?e?b?/?", "")                     -- Remove leading "/web/" or "/" safe = snapdate local N = mw.text.split(safe, "/") snapdate = N[1] if snapdate == "*" then                                            -- eg. /web/*/http.. return "index" end safe = snapdate snapdate = string.gsub(safe, "[a-z][a-z]_[0-9]?$", "")             -- Remove any trailing "re_" from date safe = snapdate snapdate = string.gsub(safe, "[-]", "")                            -- Remove dashes from date eg. 2015-01-01 safe = snapdate snapdate = string.gsub(safe, "[*]$", "")                           -- Remove trailing "*"

if not tonumber(snapdate) then return inlineRed("[Date error] (2)", "error") end local dlen = string.len(snapdate) if dlen < 4 then return inlineRed("[Date error] (3)", "error") end if dlen < 14 then snapdatelong = snapdate .. string.rep("0", 14 - dlen) else snapdatelong = snapdate end local year = string.sub(snapdatelong, 1, 4) local month = string.sub(snapdatelong, 5, 6) local day = string.sub(snapdatelong, 7, 8) if not tonumber(year) or not tonumber(month) or not tonumber(day) then return inlineRed("[Date error] (4)", "error") end if tonumber(month) > 12 or tonumber(day) > 31 or tonumber(month) < 1 then return inlineRed("[Date error] (5)", "error") end currdate = os.date("%Y") if tonumber(year) > tonumber(currdate) or tonumber(year) < 1900 then return inlineRed("[Date error] (6)", "error") end

fulldate = makeDate(year, month, day, df) if not fulldate then return inlineRed("[Date error] (7)", "error") else return fulldate end

end

--[[--< serviceName >---

Given a domain extracted by mw.uri.new (eg. web.archive.org) set tail string and service ID

]]

local function serviceName(host, nolink)

local tracking = "Category:Webarchive template other archives"

local bracketopen = "" local bracketclose = "" if nolink then bracketopen = "" bracketclose = "" end

ulx.url1.service = "other" ulx.url1.tail = " at " .. ulx.url1.host .. " " .. inlineRed("Error: unknown archive URL")

if mw.ustring.find( host, "archive.org", 1, plain ) then ulx.url1.service = "wayback" ulx.url1.tail = " at the " .. bracketopen .. "Wayback Machine" .. bracketclose tracking = "Category:Webarchive template wayback links" elseif mw.ustring.find( host, "webcitation.org", 1, plain ) then ulx.url1.service = "webcite" ulx.url1.tail = " at " .. bracketopen .. "WebCite" .. bracketclose tracking = "Category:Webarchive template webcite links" elseif mw.ustring.find( host, "archive.is", 1, plain ) then ulx.url1.service = "archiveis" ulx.url1.tail = " at " .. bracketopen .. "Archive.is" .. bracketclose tracking = "Category:Webarchive template archiveis links" elseif mw.ustring.find( host, "archive.fo", 1, plain ) then ulx.url1.service = "archiveis" ulx.url1.tail = " at " .. bracketopen .. "Archive.is" .. bracketclose tracking = "Category:Webarchive template archiveis links" elseif mw.ustring.find( host, "archive.today", 1, plain ) then ulx.url1.service = "archiveis" ulx.url1.tail = " at " .. bracketopen .. "Archive.is" .. bracketclose tracking = "Category:Webarchive template archiveis links" elseif mw.ustring.find( host, "archive[-]it.org", 1, plain ) then ulx.url1.service = "archiveit" ulx.url1.tail = " at " .. bracketopen .. "Archive-It" .. bracketclose elseif mw.ustring.find( host, "arquivo.pt", 1, plain) then ulx.url1.tail = " at the " .. "Portugese Web Archive" elseif mw.ustring.find( host, "loc.gov", 1, plain ) then ulx.url1.tail = " at the " .. bracketopen .. "Library of Congress" .. bracketclose elseif mw.ustring.find( host, "webharvest.gov", 1, plain ) then ulx.url1.tail = " at the " .. bracketopen .. "National Archives and Records Administration" .. bracketclose elseif mw.ustring.find( host, "bibalex.org", 1, plain ) then ulx.url1.tail = " at " .. "Bibliotheca Alexandrina" elseif mw.ustring.find( host, "collectionscanada", 1, plain ) then ulx.url1.tail = " at the " .. "Canadian Government Web Archive" elseif mw.ustring.find( host, "haw.nsk", 1, plain ) then ulx.url1.tail = " at the " .. "Croatian Web Archive (HAW)" elseif mw.ustring.find( host, "nlib.ee", 1, plain ) then ulx.url1.tail = " at the " .. "Estonian Web Archive" elseif mw.ustring.find( host, "vefsafn.is", 1, plain ) then ulx.url1.tail = " at the " .. "National and University Library of Iceland" elseif mw.ustring.find( host, "proni.gov", 1, plain ) then ulx.url1.tail = " at the " .. bracketopen .. "Public Record Office of Northern Ireland" .. bracketclose elseif mw.ustring.find( host, "uni[-]lj.si", 1, plain ) then ulx.url1.tail = " at the " .. "Slovenian Web Archive" elseif mw.ustring.find( host, "stanford.edu", 1, plain ) then ulx.url1.tail = " at the " .. "Stanford Web Archive" elseif mw.ustring.find( host, "nationalarchives.gov.uk", 1, plain ) then ulx.url1.tail = " at the " .. bracketopen .. "UK Government Web Archive" .. bracketclose elseif mw.ustring.find( host, "parliament.uk", 1, plain ) then ulx.url1.tail = " at the " .. bracketopen .. "UK Parliament's Web Archive" .. bracketclose elseif mw.ustring.find( host, "webarchive.org.uk", 1, plain ) then ulx.url1.tail = " at the " .. bracketopen .. "UK Web Archive" .. bracketclose elseif mw.ustring.find( host, "nlb.gov.sg", 1, plain ) then ulx.url1.tail = " at " .. "Web Archive Singapore" elseif mw.ustring.find( host, "screenshots.com", 1, plain ) then ulx.url1.tail = " at " .. "Screenshots" elseif mw.ustring.find( host, "wikiwix.com", 1, plain ) then ulx.url1.tail = " at " .. "Wikiwix" elseif mw.ustring.find( host, "perma.cc", 1, plain ) then ulx.url1.tail = " at " .. bracketopen .. "Perma.cc" .. bracketclose else tracking = "Category:Webarchive template unknown archives" end

track[tracking] = 1

end

--[[--< parseExtraArgs >---

Parse numbered arguments starting at 2, such as url2..url10, date2..date10, title2..title10 For example: Three url arguments not in numeric sequence (1..4..7). Function only processes arguments numbered 2 or greater (in this case 4 and 7) It creates numeric sequenced table entries like: urlx.url2.url = urlx.url3.url = Returns the number of URL arguments found numbered 2 or greater (in this case returns "2")

]]

local function parseExtraArgs

local i, j, argurl, argurl2, argdate, argtitle

j = 2 for i = 2, maxurls do   argurl = "url" .. i   if trimArg(args[argurl]) then argurl2 = "url" .. j     ulx[argurl2] = {} ulx[argurl2]["url"] = args[argurl] argdate = "date" .. j     if trimArg(args[argdate]) then ulx[argurl2]["date"] = args[argdate] else ulx[argurl2]["date"] = inlineRed("[Date missing]", "warning") end argtitle = "title" .. j     if trimArg(args[argtitle]) then ulx[argurl2]["title"] = args[argtitle] else ulx[argurl2]["title"] = nil end j = j + 1 end end

if j == 2 then return 0 else return j - 2 end

end

--[[-- ---

Given a date string, return "," if it's MDY

]]

local function comma(date) local N = mw.text.split(date, " ") local O = mw.text.split(N[1], "-") -- for ISO if O[1] == "index" then return "" end if not tonumber(O[1]) then return "," else return "" end end

--[[--< createTracking >---

Return data in track[] ie. tracking categories

]]

local function createTracking

local sand = "" if tableLength(track) > 0 then for key,_ in pairs(track) do     sand = sand .. "" .. key .. "" end end return sand

end

--[[--< createRendering >---

Return a rendering of the data in ulx[][]

]]

local function createRendering

local sand, displayheader, displayfield

local period1 = ""  -- For backwards compat with local period2 = "." local indexstr = "archived" if ulx.url1.date == "index" then indexstr = "archive" end -- For ,

if ulx.url1.format == "none" then if not ulx.url1.title and not ulx.url1.date then                                   -- No title. No date sand = "[" .. ulx.url1.url .. " Archived]" .. ulx.url1.tail elseif not ulx.url1.title and ulx.url1.date then                                   -- No title. Date. if ulx.url1.service == "wayback" then period1 = "." period2 = "" end sand = "[" .. ulx.url1.url .. " Archived] " .. ulx.url1.date .. comma(ulx.url1.date) .. ulx.url1.tail .. period1 elseif ulx.url1.title and not ulx.url1.date then                                   -- Title. No date. sand = "[" .. ulx.url1.url .. " " .. ulx.url1.title .. "]" .. ulx.url1.tail elseif ulx.url1.title and ulx.url1.date then                                       -- Title. Date. sand = "[" .. ulx.url1.url .. " " .. ulx.url1.title .. "]" .. ulx.url1.tail .. "&#32;(" .. indexstr .. " " .. ulx.url1.date .. ")" else return nil end if ulx.url1.extraurls > 0 then                                                     -- For multiple archive URLs local tot = ulx.url1.extraurls + 1 sand = sand .. period2 .. " Additional archives: " for i=2,tot do         local indx = "url" .. i         if ulx[indx]["title"] then displayfield = "title" else displayfield = "date" end sand = sand .. "[" .. ulx[indx]["url"] .. " " .. ulx[indx][displayfield] .. "]"         if i == tot then sand = sand .. "."         else sand = sand .. ", "         end end else return sand end return sand -- For

else if ulx.url1.format == "addlarchives" then                          -- Multiple archive services displayheader = "Additional archives: " else                                                               -- Multiple pages from the same archive displayheader = "Additional pages archived on " .. ulx.url1.date .. ": "     end local tot = 1 + ulx.url1.extraurls local sand = displayheader for i=1,tot do       local indx = "url" .. i       displayfield = ulx[indx]["title"] if ulx.url1.format == "addlarchives" then if not displayfield then displayfield = ulx[indx]["date"] end else if not displayfield then displayfield = "Page " .. i         end end sand = sand .. "[" .. ulx[indx]["url"] .. " " .. displayfield .. "]"       if i == tot then sand = sand .. "."       else sand = sand .. ", "       end end return sand end end

function p.webarchive(frame) args = frame.args if (args[1]==nil) and (args["url"]==nil) then          -- if no argument provided than check parent template/module args args = frame:getParent.args end local tname = "Webarchive"                             -- name of calling template. Change if template rename. ulx = {}                                               -- Associative array to hold template data track = {}                                             -- Associative array to hold tracking categories maxurls = 10                                           -- Max number of URLs allowed. local verifydates = "yes"                              -- See documentation. Set "no" to disable.

-- URL argument (first)

local url1 = trimArg(args.url) or trimArg(args.url1) if not url1 then return inlineError("url", "Empty.") .. createTracking end if mw.ustring.find( url1, "https://web.http", 1, plain ) then   -- track bug track["Category:Webarchive template errors"] = 1 return inlineError("url", "https://web.http") .. createTracking end if url1 == "https://web.archive.org/http:/" then                -- track bug track["Category:Webarchive template errors"] = 1 return inlineError("url", "Invalid URL") .. createTracking end

ulx.url1 = {} ulx.url1.url = url1 local uri1 = mw.uri.new(ulx.url1.url) ulx.url1.host = uri1.host ulx.url1.extraurls = parseExtraArgs

-- Nolink argument

local nolink = trimArg2(args.nolink)

serviceName(uri1.host, nolink)

-- Date argument

local date = trimArg(args.date) or trimArg(args.date1) if date == "*" and ulx.url1.service == "wayback" then date = "index" elseif date and ulx.url1.service == "wayback" and verifydates == "yes" then local ldf = dateFormat(date) if ldf then local udate = decodeWaybackDate( uri1.path, ldf ) if udate ~= date then date = udate .. inlineRed("[Date mismatch]", "warning") end end elseif date and ulx.url1.service == "webcite" and verifydates == "yes" then local ldf = dateFormat(date) if ldf then local udate = decodeWebciteDate( uri1.path, ldf ) if udate == "query" then -- skip elseif udate ~= date then date = udate .. inlineRed("[Date mismatch]", "warning") end end elseif not date and ulx.url1.service == "wayback" then date = decodeWaybackDate( uri1.path, "iso" ) if not date then date = inlineRed("[Date error] (1)", "error") end elseif not date and ulx.url1.service == "webcite" then date = decodeWebciteDate( uri1.path, "iso" ) if date == "query" then date = inlineRed("[Date missing]", "warning") elseif not date then date = inlineRed("[Date error] (1)", "error") end elseif not date then date = inlineRed("[Date missing]", "warning") end ulx.url1.date = date

-- Format argument

local format = trimArg(args.format) if not format then format = "none" else if format == "addlpages" then if not ulx.url1.date then format = "none" end elseif format == "addlarchives" then format = "addlarchives" else format = "none" end end ulx.url1.format = format

-- Title argument

local title = trimArg(args.title) or trimArg(args.title1) ulx.url1.title = title

local rend = createRendering if not rend then rend = ' Error in Template:' .. tname .. ': Unknown problem. Please report on template talk page. '   track["Category:Webarchive template errors"] = 1 end

return rend .. createTracking

end

return p