# Module:Timeline of release years

require('Module:No globals')
local p = {}  
local function items(args, year, oldrange)
local itemList = {}  
-- First loop through is to find the lowest year range, if any. If oldrange is supplied, the year range must also be greater than it.
local range = 0;
if args[year .. '_to'] or args[year .. 'a_to'] then
local newrange = tonumber(args[year .. '_to'] or args[year .. 'a_to'])
if newrange and (oldrange == nil or newrange > oldrange) then
range = newrange;
end
end
for asciiletter = 98, 106 do -- 98 > b, 106 > j
if args[year .. string.char(asciiletter) .. '_to'] then
local newrange = tonumber(args[year .. string.char(asciiletter) .. '_to'])
if newrange and (oldrange == nil or newrange > oldrange) and (range == 0 or newrange < range) then
range = newrange;
end
end
end  
-- Find items, filtered by range if available.
if args[year] or args[year .. 'a'] then
local thisrange = tonumber(args[year .. '_to'] or args[year .. 'a_to'])
if (range == 0 and thisrange == nil) or (thisrange and thisrange == range) then
table.insert(itemList, args[year] or args[year .. 'a'])
end
end
for asciiletter = 98, 106 do -- 98 > b, 106 > j
if args[year .. string.char(asciiletter)] then
local thisrange = tonumber(args[year .. string.char(asciiletter) .. '_to'])
if (range == 0 and thisrange == nil) or (thisrange and thisrange == range) then
table.insert(itemList, args[year .. string.char(asciiletter)])
end
end
end
return table.maxn(itemList), itemList, range
end  
local function color(args, year, itemNum, to_range)  
if args[year .. '_color'] then
return args[year .. '_color']
end  
if to_range and args[year .. '_to_' .. to_range .. '_color'] then
return args[year .. '_to_' .. to_range .. '_color']
end  
for yearrange = 1, 10 do
if args['range' .. yearrange] and args['range' .. yearrange .. '_color'] then
local _, _, beginyear, endyear = string.find( args['range' .. yearrange], '^(%d%d%d%d)%D+(%d%d%d%d)$' )  
local year = tonumber(year) or 9999 -- For year == 'TBA'
beginyear = tonumber(beginyear) or 0
endyear = tonumber(endyear) or 9999  
if year >= beginyear and year <= endyear then
local _, _, color1, color2 = string.find( args['range' .. yearrange .. '_color'], '^(%S*)%s*(%S*)$' )
color2 = string.find(color2, '^#?%w+$') and color2 or color1
return itemNum > 0 and color1 or color2
end
end
end  
return itemNum > 0 and '#0BDA51' or '#228B22'
end  
local function (builder, args, year, itemNum, range)
builder = builder:tag('th')
:attr('scope', 'row')
:css('-', '1.4em solid ' .. color(args, year, itemNum, range))
:wikitext(range ~= 0 and year .. '–' .. range or year)
if itemNum > 1 then
builder = builder:attr('rowspan', itemNum)
end
end  
local function (builder, itemNum, itemList)
if itemNum == 0 then return end  
if itemNum == 1 then
builder:tag('td')
:wikitext(itemList[1])
return
end  
-- if itemNum >= 2
builder:tag('td')
:addClass('rt-first')
:wikitext(itemList[1])  
for key = 2, itemNum - 1 do
builder = builder:tag('tr')
:tag('td')
:addClass('rt-next')
:wikitext(itemList[key])
end  
builder = builder:tag('tr')
:tag('td')
:addClass('rt-last')
:wikitext(itemList[itemNum])  
end  
local function row(builder, args, year, emptyyear, lastyear, highrange)
local oldrange = nil  
repeat
local itemNum, itemList, range = items(args, year, oldrange)  
-- Now check for a new high range and catch it. We need to know what highrange was prior to update though.
local oldhighrange = nil
if(range > 0 and (highrange == nil or range > highrange)) then
oldhighrange = (highrange or range)
highrange = range
end
oldhighrange = (oldhighrange or highrange)  
-- If compressempty is set, check for empty items, track empty years and high ranges, and
-- put out a compressed range when next year is found.
if args.compressempty and oldrange == nil then
-- If we're compressing and there's no items, return this year for tracking.
if #itemList < 1 then
return year, highrange
end  
-- If emptyyear is below or equal the highrange, we need to make adjustments.
if(emptyyear and oldhighrange and emptyyear <= oldhighrange) then
-- If the current year is highrange or highrange +1, suppress empty row output entirely.
-- If the current year is highrange+2 or more, adjust the emptyyear to be above highrange)
if(year <= (oldhighrange+1)) then
emptyyear = nil
elseif(year > (oldhighrange+1)) then
emptyyear = oldhighrange+1
end
end  
-- If we have items but are tracking an empty year, output compressed range row.
if emptyyear ~= nil then
builder = builder:tag('tr')
if year == 'TBA' then
(builder, args, emptyyear, 0, lastyear)
else
if year-1 == emptyyear then
(builder, args, emptyyear, 0, 0)
else
(builder, args, emptyyear, 0, year-1)
end
end
end
end  
-- We can break out if this is the case. This means we have looped through more than once, but there were no more items remaining.
if range == 0 and oldrange and #itemList < 1 then
break
end  
builder = builder:tag('tr')
(builder, args, year, itemNum, range)
(builder, itemNum, itemList)  
if range ~= 0 then
oldrange = range
end
until range == 0  
return nil, highrange
end  
function p._main(args)
-- Main module code goes here.
local currentyear = os.date('%Y')  
local ret
local firstyear, lastyear
local TBA = items(args, 'TBA') > 0 and true or false  
ret = mw.html.create( 'table' )
:addClass('release-timeline wikitable')
:addClass(args.align == '' and 'rt-' or nil)  
ret:tag('caption')
:wikitext((args.title or 'Release timeline') ..
(args.subtitle and ('<div>'..args.subtitle..'</div>') or ''))  
if tonumber(args.first) then
firstyear = tonumber(args.first)
else
for i = 1, currentyear do
if items(args, i) > 0 then
firstyear = i
break
end
end
firstyear = firstyear or (currentyear + 3)
end  
if tonumber(args.last) then
lastyear = tonumber(args.last)
else
for i = currentyear + 3, TBA and currentyear or firstyear, -1 do
if items(args, i) > 0 then
lastyear = i
break
end
end
lastyear = lastyear or (currentyear - 1)
end  
local emptyyear = nil
local highrange = nil
for year = firstyear, lastyear do
local yearcheck, newhighrange = row(ret, args, year, emptyyear, lastyear, highrange)
if (emptyyear == nil and yearcheck ~= nil) or (emptyyear ~= nil and yearcheck == nil) then
emptyyear = yearcheck
end
highrange = newhighrange
end  
if TBA then
row(ret, args, 'TBA')
end  
return mw.getCurrentFrame:extensionTag{
name = 'templatestyles', args = { src = 'Module:Timeline of release years/styles.css'}
} .. tostring(ret)
end  
function p.main
local args = require('Module:Arguments').getArgs
return p._main(args)
end  
return p