Difference between revisions of "Module:File link"
1>Mr. Stradivarius (when calling this from wikitext use a more readable error message for missing file parameters) |
Amycjgrace (talk | contribs) m (1 revision imported) |
(No difference)
| |
Latest revision as of 20:37, 28 June 2018
Documentation for this module may be created at Module:File link/doc
-- This module provides a library for formatting file wikilinks.
local yesno = require('Module:Yesno')
local checkType = require('libraryUtil').checkType
local p = {}
function p._main(args)
checkType('_main', 1, args, 'table')
-- This is basically libraryUtil.checkTypeForNamedArg, but we are rolling our
-- own function to get the right error level.
local function checkArg(key, val, level)
if type(val) ~= 'string' then
error(string.format(
"type error in '%s' parameter of '_main' (expected string, got %s)",
key, type(val)
), level)
end
end
local ret = {}
-- Adds a positional parameter to the buffer.
local function addPositional(key)
local val = args[key]
if not val then
return nil
end
checkArg(key, val, 4)
ret[#ret + 1] = val
end
-- Adds a named parameter to the buffer. We assume that the parameter name
-- is the same as the argument key.
local function addNamed(key)
local val = args[key]
if not val then
return nil
end
checkArg(key, val, 4)
ret[#ret + 1] = key .. '=' .. val
end
-- Filename
checkArg('file', args.file, 3)
ret[#ret + 1] = 'File:' .. args.file
-- Format
if args.format then
checkArg('format', args.format)
if args.formatfile then
checkArg('formatfile', args.formatfile)
ret[#ret + 1] = args.format .. '=' .. args.formatfile
else
ret[#ret + 1] = args.format
end
end
-- Border
if yesno(args.border) then
ret[#ret + 1] = 'border'
end
addPositional('location')
addPositional('alignment')
addPositional('size')
addNamed('upright')
addNamed('link')
addNamed('alt')
addNamed('page')
addNamed('class')
addNamed('lang')
addNamed('start')
addNamed('end')
addNamed('thumbtime')
addPositional('caption')
return string.format('[[%s]]', table.concat(ret, '|'))
end
function p.main(frame)
local origArgs = require('Module:Arguments').getArgs(frame, {
wrappers = 'Template:File link'
})
if not origArgs.file then
error("'file' parameter missing from [[Template:File link]]", 0)
end
-- Copy the arguments that were passed to a new table to avoid looking up
-- every possible parameter in the frame object.
local args = {}
for k, v in pairs(origArgs) do
-- Make _BLANK a special argument to add a blank parameter. For use in
-- conditional templates etc. it is useful for blank arguments to be
-- ignored, but we still need a way to specify them so that we can do
-- things like [[File:Example.png|link=]].
if v == '_BLANK' then
v = ''
end
args[k] = v
end
return p._main(args)
end
return p
