Added support for converting to Mediawiki syntax.

My job uses Mediawiki based wikis. This allows me to continuing using
vim-notes and share my notes when my coworkers need to see them.

autoload/xolox/notes/mediawiki.vim

@@ -0,0 +1,103 @@
+" Vim auto-load script
+" Author: Anthony Naddeo <anthony.naddeo@gmail.com> 
+" Last Change: December 14, 2014
+" URL: https://github.com/naddeoa 
+
+function! xolox#notes#mediawiki#view() " {{{1
+  " Convert the current note to a Mediawiki document and show the converted text.
+  let note_text = join(getline(1, '$'), "\n")
+  let mediawiki_text = xolox#notes#mediawiki#convert_note(note_text)
+  vnew
+  call setline(1, split(mediawiki_text, "\n"))
+  setlocal filetype=mediawiki
+endfunction
+
+function! xolox#notes#mediawiki#convert_note(note_text) " {{{1
+  " Convert a note's text to the [Mediawiki text format] [mediawiki]. The syntax
+  " used by vim-notes has a lot of similarities with Mediawiki, but there are
+  " some notable differences like the note title and the way code blocks are
+  " represented. This function takes the text of a note (the first argument)
+  " and converts it to the Mediawiki format, returning a string.
+  "
+  " [mediawiki]: https://www.mediawiki.org/wiki/MediaWiki
+  let starttime = xolox#misc#timer#start()
+  let blocks = xolox#notes#parser#parse_note(a:note_text)
+  call map(blocks, 'xolox#notes#mediawiki#convert_block(v:val)')
+  let mediawiki = join(blocks, "\n\n")
+  call xolox#misc#timer#stop("notes.vim %s: Converted note to Mediawik in %s.", g:xolox#notes#version, starttime)
+  return mediawiki . "\n\n"
+endfunction
+
+function! xolox#notes#mediawiki#convert_block(block) " {{{1
+  " Convert a single block produced by `xolox#misc#notes#parser#parse_note()`
+  " (the first argument, expected to be a dictionary) to the [Mediawiki text
+  " format] [mediawiki]. Returns a string.
+  if a:block.type == 'title'
+    let text = s:make_urls_explicit(a:block.text)
+    return printf("= %s =", text)
+  elseif a:block.type == 'heading'
+    let marker = repeat('=', 1 + a:block.level)
+    let text = s:make_urls_explicit(a:block.text)
+    return printf("%s %s %s", marker, text, marker)
+  elseif a:block.type == 'code'
+    return printf('<source lang="%s">%s</source>', a:block.language, a:block.text)
+  elseif a:block.type == 'divider'
+    "TODO is there an equivelant here for mediawiki?
+    return ''
+  elseif a:block.type == 'list'
+    let items = []
+    if a:block.ordered
+      let counter = 1
+      for item in a:block.items
+        let indent = repeat('#', item.indent + 1)
+        let text = s:make_urls_explicit(item.text)
+        if text =~ "DONE"
+            call add(items, printf("%s ~~%s~~", indent, text))
+        else
+            call add(items, printf("%s %s", indent, text))
+        endif
+        let counter += 1
+      endfor
+    else
+      for item in a:block.items
+        let indent = repeat('*', item.indent + 1)
+        let text = s:make_urls_explicit(item.text)
+        if text =~ "DONE"
+            call add(items, printf("%s ~~%s~~", indent, text))
+        else
+            call add(items, printf("%s %s", indent, text))
+        endif
+      endfor
+    endif
+    let counter = 1
+    return join(items, "\n")
+  elseif a:block.type == 'block-quote'
+    let lines = []
+    for line in a:block.lines
+      let prefix = repeat('>', line.level)
+      call add(lines, printf('%s %s', prefix, line.text))
+    endfor
+    return join(lines, "\n")
+  elseif a:block.type == 'paragraph'
+    let text = s:make_urls_explicit(a:block.text)
+    if len(text) <= 50 && text =~ ':$'
+      let text = printf("'''%s'''", text)
+    endif
+    return text
+  else
+    let msg = "Encountered unsupported block: %s!"
+    throw printf(msg, string(a:block))
+  endif
+endfunction
+
+function! s:make_urls_explicit(text) " {{{1
+  " In the vim-notes syntax, URLs are implicitly hyperlinks.
+  " In Mediawiki syntax they have to be wrapped in [[markers]].
+  return substitute(a:text, g:xolox#notes#url_pattern, '\= s:url_callback(submatch(0))', 'g')
+endfunction
+
+function! s:url_callback(url)
+  let label = substitute(a:url, '^\w\+:\(//\)\?', '', '')
+  return printf('[%s %s]', a:url, label)
+endfunction
+

plugin/notes.vim

@@ -37,6 +37,7 @@ command! -bar -bang MostRecentNote call xolox#notes#recent#edit(<q-bang>)
 command! -bar -count=1 ShowTaggedNotes call xolox#notes#tags#show_tags(<count>)
 command! -bar IndexTaggedNotes call xolox#notes#tags#create_index()
 command! -bar NoteToMarkdown call xolox#notes#markdown#view()
+command! -bar NoteToMediawiki call xolox#notes#mediawiki#view()
 command! -bar -nargs=? NoteToHtml call xolox#notes#html#view(<q-args>)
 
 " TODO Generalize this so we have one command + modifiers (like :tab)?