1 files changed, 24 insertions, 0 deletions
diff --git a/vim/autoload/mail/importance.vim b/vim/autoload/mail/importance.vim
new file mode 100644
index 00000000..6a5ed096
--- /dev/null
+++ b/vim/autoload/mail/importance.vim
@@ -0,0 +1,24 @@
+let s:fields = {
+      \ 'high': {
+        \ 'Importance': 'High',
+        \ 'X-Priority': '1',
+        \},
+      \ 'low': {
+        \ 'Importance': 'Low',
+        \ 'X-Priority': '5',
+        \},
+      \ 'normal': {},
+      \}
+
+function! mail#importance#Set(level) abort
+  let header = mail#header#Read()
+  let fields = s:fields[a:level]
+  for name in ['Importance', 'X-Priority']
+    if has_key(fields, name)
+      call mail#header#field#Set(header, name, fields[name])
+    else
+      call mail#header#field#Clear(header, name)
+    endif
+  endfor
+  call mail#header#Write(header)
+endfunction