Extend sandwich for cloze notes

.vim/after/ftplugin/pandoc/sandwich.vim

@@ -0,0 +1,50 @@
+function GetClozeNumber()
+
+  " let REGEX_CLOZE_NOTE_START = 'START\nCloze\n'
+  " " Backwards search for Cloze note start from cursor position
+  " let cloze_note_start = searchpos(REGEX_CLOZE_NOTE_START, 'bnW', line("gg"))
+  " if max(cloze_note_start) != 0
+  " " Part of a cloze note
+  "   ...
+  " else
+  "   " Not part of a cloze note
+  "   return 1
+  " endif
+
+  let REGEX_CLOZE_START = '{{c\d\+::'
+
+  let saved_cursor = getcurpos()[1:-1]
+
+  call cursor(saved_cursor)
+  " Find previous cloze match
+  let prev_match = searchpos(REGEX_CLOZE_START, 'bW', line("gg"))
+  " Only get number if cloze was matched (i.e. when cursor does not end up at
+  " start of file)
+  if max(prev_match) != 0
+    " Get word under cursor (ignoring curly braces and `::`),
+    " get the second character of the word and cast it to an int
+    " add one for the next cloze number
+    return str2nr(expand("<cword>")[1]) + 1
+  else
+    return 1
+  endif
+endfunction
+
+" Wrap the next cloze number
+function GetClozeStart()
+  return "{{c" . GetClozeNumber() . "::"
+endfunction
+
+function GetClozeEnd()
+  return "}}"
+endfunction
+
+let g:sandwich#recipes += [
+      \   {
+      \     'buns':     ['GetClozeStart()', 'GetClozeEnd()'],
+      \     'expr'    : 1,
+      \     'filetype': ['pandoc'],
+      \     'input':    ['c'],
+      \     'nesting':  1
+      \   }
+      \ ]