Module:Redirect: Difference between revisions

Module:Redirect (edit)

Revision as of 10:52, 24 July 2013

712 bytes added , 10 years ago

Suppress errors on non-existent pages - was causing an error to appear on MediaWiki:Protectedpagetext in some cases. Also use pcall for mw.title.new, and a few other tweaks.

Anonymous user

wikipedia>Mr. Stradivarius

@@ Line 7: / Line 7: @@
 -- [[{{#invoke:redirect|main|redirect-page-name}}]] and {{#invoke:redirect|main|redirect-page-name|bracket=yes}}
-p={}
+local p = {}
 function p.main(frame)
-     local args, pargs = frame.args, (frame:getParent() or {}).args or {}
+     -- If called via #invoke, use the args passed into the invoking
-     local rname, bracket = args[1] or pargs[1], args.bracket or pargs.bracket
+    -- template, or the args passed to #invoke if any exist. Otherwise
+    -- assume args are being passed directly in from the debug console
+    -- or from another Lua module.
+    local origArgs
+    if frame == mw.getCurrentFrame() then
+        origArgs = frame:getParent().args
+        for k, v in pairs( frame.args ) do
+            origArgs = frame.args
+            break
+        end
+    else
+        origArgs = frame
+    end
+    -- Trim whitespace and remove blank arguments.
+    local args = {}
+    for k, v in pairs( origArgs ) do
+        v = mw.text.trim( v )
+        if v ~= '' then
+            args[k] = v
+        end
+    end
+     local rname, bracket = args[1], args.bracket
-     if not rname or not mw.ustring.match(rname, "%S") then return "" end
+     if type(rname) ~= "string" or not mw.ustring.match(rname, "%S") then return end
      bracket = bracket and "[[%s]]" or "%s"
-     rname = mw.ustring.match(rname,"%[%[(.+)%]%]") or rname
+     rname = mw.ustring.match(rname, "%[%[(.+)%]%]") or rname
-     local rpage, err = mw.title.new(rname)
+    -- Get the title object, passing the function through pcall
+    -- in case we are over the expensive function count limit.
-    -- avoid expensive operation when nothing to do
+     local noError, rpage = pcall(mw.title.new, rname)
-     if not rpage then
+     if not noError or noError and not rpage or not rpage.isRedirect then
-         err = "File not found (mw.title.new failed)"
+         -- mw.title.new failed, or the page is not a redirect, so use the passed page name.
-     elseif rpage.id == 0 then
+        return mw.ustring.format(bracket, rname)
-         err = "File not found (id=0):"
+    end
-    elseif not rpage.isRedirect then
-         return mw.ustring.format(bracket, rname) -- not a redirect so use passed page name (for some general-purpose template use)
+    local redirect = mw.ustring.match(rpage:getContent() or "", "^%s*#[Rr][Ee][Dd][Ii][Rr][Ee][Cc][Tt]%s*%[%[([^%[%]]-)%]%]" )
+     if redirect then
+        -- Decode html entities and percent encodings.
+         redirect = mw.text.decode(redirect, true)
+        redirect = mw.uri.decode(redirect, 'WIKI')
+         return mw.ustring.format(bracket, redirect)
      else
-         local redirect = mw.ustring.match( rpage:getContent() or "", "^#[Rr][Ee][Dd][Ii][Rr][Ee][Cc][Tt]%s*%[%[(.-)%]%]" )
+         return mw.ustring.format('<span class="error">[[Module:redirect]] error: could not parse redirect - [[%s]]</span>', rname)
-        if redirect then
-            return mw.ustring.format(bracket, redirect)
-        end
-        err = "failed to understand"
      end
-    return '<span style="text-color:red;">[[Module:redirect]] error: ' .. err .. ' - [[' .. rname .. ']]</span>'
 end
 return p