From 6a3c1e29ce1da699af27603e1787a284c7395d57 Mon Sep 17 00:00:00 2001
From: Lucas Nussbaum <lucas@lucas-nussbaum.net>
Date: Wed, 6 May 2009 13:39:07 +0200
Subject: Use Message-Id instead of X-CacheIndex

---
 lib/feed2imap/feed2imap.rb  | 9 ++++++---
 lib/feed2imap/imap.rb       | 4 ++--
 lib/feed2imap/itemtomail.rb | 4 ++--
 3 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/lib/feed2imap/feed2imap.rb b/lib/feed2imap/feed2imap.rb
index 3627ab0..fb8fb12 100644
--- a/lib/feed2imap/feed2imap.rb
+++ b/lib/feed2imap/feed2imap.rb
@@ -234,14 +234,17 @@ class Feed2Imap
       @logger.info("#{f.name}: #{newitems.length} new items, #{updateditems.length} updated items.") if newitems.length > 0 or updateditems.length > 0 or @logger.level == Logger::DEBUG
       begin
         if !cacherebuild
+          fn = f.name.gsub(/[^0-9A-Za-z]/,'')
           updateditems.each do |i|
-            email = item_to_mail(i, i.cacheditem.index, true, f.name, f.include_images, f.wrapto)
+            id = "<#{fn}-#{i.cacheditem.index}@acme.com>"
+            email = item_to_mail(i, id, true, f.name, f.include_images, f.wrapto)
             f.imapaccount.updatemail(f.folder, email,
-                                     i.cacheditem.index, i.date || Time::new)
+                                     id, i.date || Time::new)
           end
           # reverse is needed to upload older items first (fixes gna#8986)
           newitems.reverse.each do |i|
-            email = item_to_mail(i, i.cacheditem.index, false, f.name, f.include_images, f.wrapto)
+            id = "<#{fn}-#{i.cacheditem.index}@acme.com>"
+            email = item_to_mail(i, id, false, f.name, f.include_images, f.wrapto)
             f.imapaccount.putmail(f.folder, email, i.date || Time::new)
           end
         end
diff --git a/lib/feed2imap/imap.rb b/lib/feed2imap/imap.rb
index 63cd733..6840c11 100644
--- a/lib/feed2imap/imap.rb
+++ b/lib/feed2imap/imap.rb
@@ -102,10 +102,10 @@ class ImapAccount
   end
 
   # update a mail
-  def updatemail(folder, mail, idx, date = Time::now)
+  def updatemail(folder, mail, id, date = Time::now)
     create_folder_if_not_exists(folder)
     @connection.select(folder)
-    searchres = @connection.search(['HEADER', 'X-CacheIndex', "-#{idx}-"])
+    searchres = @connection.search(['HEADER', 'Message-Id', id])
     flags = nil
     if searchres.length > 0
       # we get the flags from the first result and delete everything
diff --git a/lib/feed2imap/itemtomail.rb b/lib/feed2imap/itemtomail.rb
index 00ce84f..ffa6b22 100644
--- a/lib/feed2imap/itemtomail.rb
+++ b/lib/feed2imap/itemtomail.rb
@@ -47,7 +47,7 @@ class String
   end
 end
 
-def item_to_mail(item, index, updated, from = 'Feed2Imap', inline_images = false, wrapto = false)
+def item_to_mail(item, id, updated, from = 'Feed2Imap', inline_images = false, wrapto = false)
   message = RMail::Message::new
   if item.creator and item.creator != ''
     if item.creator.include?('@')
@@ -66,7 +66,7 @@ def item_to_mail(item, index, updated, from = 'Feed2Imap', inline_images = false
     message.header['Date'] = item.date.rfc2822
   end
   message.header['X-Feed2Imap-Version'] = F2I_VERSION if defined?(F2I_VERSION)
-  message.header['X-CacheIndex'] = "-#{index}-"
+  message.header['Message-Id'] = id
   message.header['X-F2IStatus'] = "Updated" if updated
   # treat subject. Might need MIME encoding.
   subj = item.title or (item.date and item.date.to_s) or item.link
-- 
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