From 5ed4c37e5285ae404f7ea662e42797a2a4f53967 Mon Sep 17 00:00:00 2001
From: Manos Pitsidianakis <el13635@mail.ntua.gr>
Date: Thu, 28 Sep 2017 18:04:00 +0300
Subject: [PATCH] Add comments for missing Message-IDs

---
 src/mailbox/email/mod.rs | 5 +++++
 src/mailbox/thread.rs    | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/src/mailbox/email/mod.rs b/src/mailbox/email/mod.rs
index 9a8e6333..00df6390 100644
--- a/src/mailbox/email/mod.rs
+++ b/src/mailbox/email/mod.rs
@@ -424,6 +424,11 @@ impl Envelope {
                 datetime = Some(value.to_string());
             }
         }
+        /*
+         * https://tools.ietf.org/html/rfc5322#section-3.6.4
+         *
+         * if self.message_id.is_none() { ...
+         */
         if let Some(ref mut x) = in_reply_to {
             self.push_references(x);
         }
diff --git a/src/mailbox/thread.rs b/src/mailbox/thread.rs
index 891cda72..0525f08a 100644
--- a/src/mailbox/thread.rs
+++ b/src/mailbox/thread.rs
@@ -123,6 +123,9 @@ fn build_collection(
     for (i, x) in collection.iter_mut().enumerate() {
         let x_index; /* x's index in threads */
         let m_id = x.get_message_id_raw().to_string();
+        /* TODO: Check for missing Message-ID.
+         * Solutions: generate a hidden one
+         */
         if id_table.contains_key(&m_id) {
             let t = id_table[&m_id];
             /* the already existing Container should be empty, since we're