require('Module:No globals')
local getArgs = require('Module:Arguments').getArgs
local hatnote = require('Module:Hatnote')._hatnote
local formatLink = require('Module:Format link')._formatLink
local p = {}
-- Lua implementation of [[Template:CategoryPair]]
-- Arguments:
-- prevTitle -- mw.title.Title object for preceding category
-- nextTitle -- mw.title.Title object for succeeding category
-- Returns:
-- hatnote that says "see also" for one or both of prev/next (depending on whether they exist)
function p._pair(prevTitle, nextTitle)
prevTitle = prevTitle and prevTitle.exists and prevTitle
nextTitle = nextTitle and nextTitle.exists and nextTitle
local note = ''
local bitmap = 0
if prevTitle then bitmap = bitmap + 1 end
if nextTitle then bitmap = bitmap + 2 end
if bitmap == 0 then --neither prev nor next
if mw.title.getCurrentTitle().nsText ~= 'Category' then
return ''
end
return '[[Category:Pages using category pair with no output]]'
elseif bitmap == 1 then --prev and not next
note = mw.ustring.format(
'See also the preceding %s', formatLink{link = prevTitle.fullText}
)
elseif bitmap == 2 then --next and not prev
note = mw.ustring.format(
'See also the succeeding %s', formatLink{link = nextTitle.fullText}
)
elseif bitmap == 3 then --both prev and next
note = mw.ustring.format(
'See also the preceding %s and the succeeding %s',
formatLink{link = prevTitle.fullText},
formatLink{link = nextTitle.fullText}
)
end
return hatnote(note, {extraclasses = 'seealso'})
end
function p.catPair(frame)
local args = getArgs(frame, {wrappers={'Template:Category pair'}})
local prevTitle = args[1] and mw.title.new(args[1],'Category')
local nextTitle = args[2] and mw.title.new(args[2],'Category')
return p._pair(prevTitle, nextTitle)
end
function p.prevCat(frame)
local args = getArgs(frame, {wrappers={'Template:Preceding category'}})
local prevTitle = args[1] and mw.title.new(args[1],'Category')
return p._pair(prevTitle, nil)
end
function p.nextCat(frame)
local args = getArgs(frame, {wrappers={'Template:Succeeding category'}})
local nextTitle = args[1] and mw.title.new(args[1],'Category')
return p._pair(nil, nextTitle)
end
return p
