From: Kevin McCarthy <kevin@8t8.us>
Date: Thu, 14 Sep 2017 19:43:32 +0000 (-0700)
Subject: Improve imap fetch handler to accept an initial UID. (closes #3969)
X-Git-Tag: mutt-1-9-1-rel~4
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=963c8ff0dfeb5900ec6ba8a0122ac5d7923b912a;p=mutt

Improve imap fetch handler to accept an initial UID. (closes #3969)

Gmail sends flag updates with a UID before the FLAGS.  The handler was
very simple, and so ignored the flag update in that case.

Pull the code from msg_parse_fetch(), paring down to just UID and
FLAGS.  This will handle arbitrary order data items.
---

diff --git a/imap/command.c b/imap/command.c
index 496154e8..891efb74 100644
--- a/imap/command.c
+++ b/imap/command.c
@@ -649,7 +649,7 @@ static void cmd_parse_expunge (IMAP_DATA* idata, const char* s)
  *   Of course, a lot of code here duplicates code in message.c. */
 static void cmd_parse_fetch (IMAP_DATA* idata, char* s)
 {
-  unsigned int msn;
+  unsigned int msn, uid;
   HEADER *h;
 
   dprint (3, (debugfile, "Handling FETCH\n"));
@@ -680,18 +680,41 @@ static void cmd_parse_fetch (IMAP_DATA* idata, char* s)
   }
   s++;
 
-  if (ascii_strncasecmp ("FLAGS", s, 5) != 0)
+  while (*s)
   {
-    dprint (2, (debugfile, "Only handle FLAGS updates\n"));
-    return;
-  }
+    SKIPWS (s);
 
-  /* If server flags could conflict with mutt's flags, reopen the mailbox. */
-  if (h->changed)
-    idata->reopen |= IMAP_EXPUNGE_PENDING;
-  else {
-    imap_set_flags (idata, h, s);
-    idata->check_status = IMAP_FLAGS_PENDING;
+    if (ascii_strncasecmp ("FLAGS", s, 5) == 0)
+    {
+      /* If server flags could conflict with mutt's flags, reopen the mailbox. */
+      if (h->changed)
+        idata->reopen |= IMAP_EXPUNGE_PENDING;
+      else
+      {
+        imap_set_flags (idata, h, s);
+        idata->check_status = IMAP_FLAGS_PENDING;
+      }
+      return;
+    }
+    else if (ascii_strncasecmp ("UID", s, 3) == 0)
+    {
+      s += 3;
+      SKIPWS (s);
+      uid = (unsigned int) atoi (s);
+      if (uid != HEADER_DATA(h)->uid)
+      {
+        dprint (2, (debugfile, "FETCH UID vs MSN mismatch.  Skipping update.\n"));
+        return;
+      }
+      s = imap_next_word (s);
+    }
+    else if (*s == ')')
+      s++; /* end of request */
+    else if (*s)
+    {
+      dprint (2, (debugfile, "Only handle FLAGS updates\n"));
+      return;
+    }
   }
 }
 
diff --git a/imap/message.c b/imap/message.c
index 8282ec10..4c882165 100644
--- a/imap/message.c
+++ b/imap/message.c
@@ -1196,7 +1196,7 @@ char* imap_set_flags (IMAP_DATA* idata, HEADER* h, char* s)
   hd = h->data;
   newh.data = hd;
 
-  dprint (2, (debugfile, "imap_fetch_message: parsing FLAGS\n"));
+  dprint (2, (debugfile, "imap_set_flags: parsing FLAGS\n"));
   if ((s = msg_parse_flags (&newh, s)) == NULL)
     return NULL;