Module documentation[create]
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-- <nowiki>
local p = {}
local getArgs = require("Dev:Arguments")["getArgs"]
local hash = require("Dev:Hash")
-- "switch statement" for path based on crop position
local positions = {
top = function (args)
if not args["width"] or not args["height"] then
return nil
end
local result = "/top-crop"
if not args["upscale"] then
result = result .. "-down"
end
result = result .. "/width/" .. args["width"] .. "/height/" ..
args["height"]
return result
end,
center = function (args)
if not args["width"] or not args["height"] then
return nil
end
local result = "/zoom-crop"
if not args["upscale"] then
result = result .. "-down"
end
result = result .. "/width/" .. args["width"] .. "/height/" ..
args["height"]
return result
end,
custom = function (args)
if not args["width"] or not args["window width"] or
not args["window height"] then
return nil
end
local result = "/window-crop"
if args["fixed"] and args["height"] then
result = result .. "-fixed/width/" .. args["width"] ..
"/height/" .. args["height"]
else
result = result .. "/width/" .. args["width"]
end
result = result .. "/x-offset/" .. (args["x offset"] or 0) ..
"/y-offset/" .. (args["y offset"] or 0) .. "/window-width/" ..
args["window width"] .. "/window-height/" ..
args["window height"]
return result
end
}
-- "switch statement" for path based on mode
local modes = {
set = function (args)
if not args["width"] or not args["height"] then
return nil
end
local result = "/fixed-aspect-ratio"
if not args["upscale"] then
result = result .. "-down"
end
result = result .. "/width/" .. args["width"] .. "/height/" ..
args["height"]
return result
end,
width = function (args)
if not args["width"] then
return nil
end
local result = "/scale-to-width"
if not args["upscale"] then
result = result .. "-down"
end
result = result .. "/" .. args["width"]
return result
end,
height = function (args)
if not args["height"] then
return nil
end
return "/scale-to-height-down/" .. args["height"]
end,
max = function (args)
if not args["width"] or not args["height"] then
return nil
end
local result = "/thumbnail"
if not args["upscale"] then
result = result .. "-down"
end
result = result .. "/width/" .. args["width"] .. "/height/" ..
args["height"]
return result
end,
crop = function (args)
return args["position"] and
type(positions[args["position"]]) == "function" and
positions[args["position"]](args) or nil
end
}
function p.main(frame)
-- attempt to determine if provided with valid frame object
local no_frame = not (type(frame.preprocess) == "function")
--[[
- retrieve arguments
- if no valid frame object, assume table of arguments
--]]
local raw_args, args
if no_frame then
raw_args = frame
args = mw.clone(frame)
for k, v in pairs(args) do
if type(v) == "string" then
v = v:match("^%s*(.-)%s*$")
if v == "" then
v = nil
end
args[k] = v
end
end
else
raw_args = getArgs(frame, {trim = false, removeBlanks = false})
args = getArgs(frame)
end
local image = args["image"]
-- output error message if no image was specified
if not image then
return raw_args["error"] or ("<strong class=\"error\">Template error:" ..
" An image has not been specified.</strong>")
end
-- determine langauge and domain for image URL
local language = args["language"] or
mw.language.getContentLanguage():getCode()
if language == "en" then
language = nil
end
local domain = args["domain"] or
mw.site.server:match("^.*/(.*)%.fandom%.com.*$") or
mw.site.server:match("^.*/(.*)%.wikia%.org.*$")
if not args["keep subdomains"] then
domain = domain:match("^.-%.?([^%.]*)$")
end
if args["language subdomains"] and language then
domain = language .. "." .. domain
language = nil
end
--[[
- if possible, assume local wiki and use parser function "filepath" to get
base image URL
- else, contruct base image URL from arguments
- reassign "image" variable because we can
--]]
if not (args["domain"] or args["language"]) and not no_frame then
image = frame:preprocess("{{filepath: " .. image .. "}}")
:match("^(.*/).-$")
else
-- determine code for image URL
local code = args["code"]
if not code or #code < 2 then
code = hash.MD5(image).hexdigest()
end
-- contruct base image URL from arguments
image = "https://static.wikia.nocookie.net/" .. domain ..
"/images/" .. mw.ustring.sub(code, 1, 1) .. "/" ..
mw.ustring.sub(code, 1, 2) .. "/" .. mw.uri.encode(image, "WIKI") ..
"/revision/"
end
image = image .. (args["replaced"] or "latest")
-- create URI object and, if applicable, add language
local url = mw.uri.new(image)
if language then
url:extend({["path-prefix"] = language})
end
local link = args["link"]
local result = ""
--[[
- if applicable, construct link open and set as return value
- if link specified as non-whitespace, use specified target
--- if internal/interwiki format, retrieve full URL
- if link not specified, use base image URL
--]]
if link then
if link:match("://") then
result = "[" .. link
else
result = "<span class=\"plainlinks\">[" ..
tostring(mw.uri.fullUrl(link))
end
elseif not raw_args["link"] then
result = "<span class=\"plainlinks\">[" .. tostring(url)
end
-- add to path based on mode and, if applicable, crop position
url["path"] = url["path"] .. (args["mode"] and
type(modes[args["mode"]]) == "function" and
modes[args["mode"]](args) or "")
-- construct query string
if args["query"] then
url:extend(mw.uri.parseQueryString(args["query"]))
end
if args["fill"] then
if url["query"] and url.query.fill then
if type(url.query.fill) == "table" then
table.insert(url.query.fill, args["fill"])
else
url.query.fill = {url.query.fill, args["fill"]}
end
else
url:extend({fill = args["fill"]})
end
end
-- if language is applicable and was overwritten, re-add it to query
if language and language ~= url.query["path-prefix"] then
if type(url.query["path-prefix"]) == "table" then
table.insert(url.query["path-prefix"], language)
else
url.query["path-prefix"] = {url.query["path-prefix"], language}
end
end
-- concatenate image URL to return value
result = result .. " " .. tostring(url)
-- if applicable, construct link close and concatenate to return value
if link then
if link:match("://") then
result = result .. "]"
else
result = result .. "]</span>"
end
elseif not raw_args["link"] then
result = result .. "]</span>"
end
return result
end
return p
-- </nowiki>