Module:Availability

This module implements the {{availability}} template, which is placed on every song page. This generates the "Availability" and "Tour stats" sections, as applicable.

---

local p = {}

local function pairsByKeys (t, f)
	local a = {}
	for n in pairs(t) do table.insert(a, n) end
	table.sort(a, f)
	local i = 0      -- iterator variable
	local iter = function ()   -- iterator function
		i = i + 1
		if a[i] == nil then return nil
		else return a[i], t[a[i]]
		end
	end
	return iter
end

function p._main(song)
	local cargo = mw.ext.cargo
	local albums = cargo.query(
		'track_listings, albums, releases',
		"track_listings._pageName=title, releases.released=date, albums.type=type",
		{
			where = "releases.released != '' AND song = \"" .. song .. '"',
			join = 'track_listings._pageName=albums._pageName,albums.name=releases.work',
			groupBy = 'track_listings.work',
			orderBy = 'releases.released ASC'
		}
	)
	local songs = cargo.query(
		'track_listings, songs, releases',
		"track_listings._pageName=title, releases.released=date, songs.type=type",
		{
			where = "releases.released != '' AND song = \"" .. song .. '"',
			join = 'track_listings._pageName=songs._pageName,songs.name=releases.work',
			groupBy = 'track_listings.work',
			orderBy = 'releases.released ASC'
		}
	)

	local releasesByDate = {}

	for r = 1, #songs do
		releasesByDate[songs[r]['date']] = songs[r]
	end
	for r = 1, #albums do
		releasesByDate[albums[r]['date']] = albums[r]
	end

	for date, release in pairsByKeys(releasesByDate) do
		
	end
end

function p.main(frame)
	local song = frame.args[1]
	return p._main(song)
end

return p