feat: Remove Config::ConfiguredSentboxFolder

It's used in `fetch_existing_msgs()`, but we can remove it and tell users that they need to
move/copy messages from Sentbox to Inbox so that Delta Chat adds all contacts from them. This way
users will be also informed that Delta Chat needs users to CC/BCC/To themselves to see messages sent
from other MUAs.

Author: iequidoo

python/tests/test_1_online.py

@@ -269,7 +269,7 @@ def test_enable_mvbox_move(acfactory, lp):
     assert ac2._evtracker.wait_next_incoming_message().text == "message1"
 
 
-def test_mvbox_thread_and_sentbox(acfactory, lp):
+def test_mvbox_thread_and_trash(acfactory, lp):
     lp.sec("ac1: start with mvbox thread")
     ac1 = acfactory.new_online_configuring_account(mvbox_move=True)
 
@@ -279,8 +279,8 @@ def test_mvbox_thread_and_sentbox(acfactory, lp):
     lp.sec("ac2 and ac1: waiting for configuration")
     acfactory.bring_accounts_online()
 
-    lp.sec("ac1: create sentbox")
-    ac1.direct_imap.create_folder("Sent")
+    lp.sec("ac1: create trash")
+    ac1.direct_imap.create_folder("Trash")
     ac1.set_config("scan_all_folders_debounce_secs", "0")
     ac1.stop_io()
     ac1.start_io()
@@ -290,7 +290,7 @@ def test_mvbox_thread_and_sentbox(acfactory, lp):
     assert ac2._evtracker.wait_next_incoming_message().text == "message1"
 
     assert ac1.get_config("configured_mvbox_folder") == "DeltaChat"
-    while ac1.get_config("configured_sentbox_folder") != "Sent":
+    while ac1.get_config("configured_trash_folder") != "Trash":
         ac1._evtracker.get_matching("DC_EVENT_CONNECTIVITY_CHANGED")
 
 
@@ -834,9 +834,9 @@ def test_no_draft_if_cant_send(acfactory):
 
 def test_dont_show_emails(acfactory, lp):
     """Most mailboxes have a "Drafts" folder where constantly new emails appear but we don't actually want to show them.
-    So: If it's outgoing AND there is no Received header AND it's not in the sentbox, then ignore the email.
+    So: If it's outgoing AND there is no Received header, then ignore the email.
 
-    If the draft email is sent out later (i.e. moved to "Sent"), it must be shown.
+    If the draft email is sent out and received later (i.e. it's in "Inbox"), it must be shown.
 
     Also, test that unknown emails in the Spam folder are not shown."""
     ac1 = acfactory.new_online_configuring_account()
@@ -845,7 +845,6 @@ def test_dont_show_emails(acfactory, lp):
 
     acfactory.wait_configured(ac1)
     ac1.direct_imap.create_folder("Drafts")
-    ac1.direct_imap.create_folder("Sent")
     ac1.direct_imap.create_folder("Spam")
     ac1.direct_imap.create_folder("Junk")
 
@@ -861,21 +860,7 @@ def test_dont_show_emails(acfactory, lp):
         Message-ID: <[email protected]>
         Content-Type: text/plain; charset=utf-8
 
-        message in Drafts that is moved to Sent later
-    """.format(
-            ac1.get_config("configured_addr"),
-        ),
-    )
-    ac1.direct_imap.append(
-        "Sent",
-        """
-        From: ac1 <{}>
-        Subject: subj
-        To: [email protected]
-        Message-ID: <[email protected]>
-        Content-Type: text/plain; charset=utf-8
-
-        message in Sent
+        message in Drafts received later
     """.format(
             ac1.get_config("configured_addr"),
         ),
@@ -955,31 +940,31 @@ def test_dont_show_emails(acfactory, lp):
     lp.sec("All prepared, now let DC find the message")
     ac1.start_io()
 
-    msg = ac1._evtracker.wait_next_messages_changed()
-
     # Wait until each folder was scanned, this is necessary for this test to test what it should test:
     ac1._evtracker.wait_idle_inbox_ready()
 
-    assert msg.text == "subj – message in Sent"
+    fresh_msgs = list(ac1.get_fresh_messages())
+    assert len(fresh_msgs) == 1
+    msg = fresh_msgs[0]
     chat_msgs = msg.chat.get_messages()
-    assert len(chat_msgs) == 2
+    assert len(chat_msgs) == 1
     assert any(msg.text == "subj – Actually interesting message in Spam" for msg in chat_msgs)
 
     assert not any("unknown.address" in c.get_name() for c in ac1.get_chats())
     ac1.direct_imap.select_folder("Spam")
     assert ac1.direct_imap.get_uid_by_message_id("[email protected]")
 
     ac1.stop_io()
-    lp.sec("'Send out' the draft, i.e. move it to the Sent folder, and wait for DC to display it this time")
+    lp.sec("'Send out' the draft by moving it to Inbox, and wait for DC to display it this time")
     ac1.direct_imap.select_folder("Drafts")
     uid = ac1.direct_imap.get_uid_by_message_id("[email protected]")
-    ac1.direct_imap.conn.move(uid, "Sent")
+    ac1.direct_imap.conn.move(uid, "Inbox")
 
     ac1.start_io()
     msg2 = ac1._evtracker.wait_next_messages_changed()
 
-    assert msg2.text == "subj – message in Drafts that is moved to Sent later"
-    assert len(msg.chat.get_messages()) == 3
+    assert msg2.text == "subj – message in Drafts received later"
+    assert len(msg.chat.get_messages()) == 2
 
 
 def test_bot(acfactory, lp):

src/config.rs

@@ -281,9 +281,6 @@ pub enum Config {
     /// Configured folder for chat messages.
     ConfiguredMvboxFolder,
 
-    /// Configured "Sent" folder.
-    ConfiguredSentboxFolder,
-
     /// Configured "Trash" folder.
     ConfiguredTrashFolder,
 

src/context.rs

@@ -861,10 +861,6 @@ impl Context {
             .get_config(Config::ConfiguredInboxFolder)
             .await?
             .unwrap_or_else(|| "<unset>".to_string());
-        let configured_sentbox_folder = self
-            .get_config(Config::ConfiguredSentboxFolder)
-            .await?
-            .unwrap_or_else(|| "<unset>".to_string());
         let configured_mvbox_folder = self
             .get_config(Config::ConfiguredMvboxFolder)
             .await?
@@ -960,7 +956,6 @@ impl Context {
             folders_configured.to_string(),
         );
         res.insert("configured_inbox_folder", configured_inbox_folder);
-        res.insert("configured_sentbox_folder", configured_sentbox_folder);
         res.insert("configured_mvbox_folder", configured_mvbox_folder);
         res.insert("configured_trash_folder", configured_trash_folder);
         res.insert("mdns_enabled", mdns_enabled.to_string());

src/imap.rs

@@ -164,7 +164,7 @@ impl FolderMeaning {
             FolderMeaning::Spam => None,
             FolderMeaning::Inbox => Some(Config::ConfiguredInboxFolder),
             FolderMeaning::Mvbox => Some(Config::ConfiguredMvboxFolder),
-            FolderMeaning::Sent => Some(Config::ConfiguredSentboxFolder),
+            FolderMeaning::Sent => None,
             FolderMeaning::Trash => Some(Config::ConfiguredTrashFolder),
             FolderMeaning::Drafts => None,
             FolderMeaning::Virtual => None,
@@ -790,9 +790,6 @@ impl Imap {
         context: &Context,
         session: &mut Session,
     ) -> Result<()> {
-        add_all_recipients_as_contacts(context, session, Config::ConfiguredSentboxFolder)
-            .await
-            .context("failed to get recipients from the sentbox")?;
         add_all_recipients_as_contacts(context, session, Config::ConfiguredMvboxFolder)
             .await
             .context("failed to get recipients from the movebox")?;
@@ -1980,7 +1977,7 @@ async fn spam_target_folder_cfg(
     }
 }
 
-/// Returns `ConfiguredInboxFolder`, `ConfiguredMvboxFolder` or `ConfiguredSentboxFolder` if
+/// Returns `ConfiguredInboxFolder` or `ConfiguredMvboxFolder` if
 /// the message needs to be moved from `folder`. Otherwise returns `None`.
 pub async fn target_folder_cfg(
     context: &Context,

src/imap/imap_tests.rs

@@ -119,9 +119,6 @@ async fn check_target_folder_combination(
     t.ctx
         .set_config(Config::ConfiguredMvboxFolder, Some("DeltaChat"))
         .await?;
-    t.ctx
-        .set_config(Config::ConfiguredSentboxFolder, Some("Sent"))
-        .await?;
     t.ctx
         .set_config(Config::MvboxMove, Some(if mvbox_move { "1" } else { "0" }))
         .await?;

src/imap/scan_folders.rs

@@ -84,21 +84,15 @@ impl Imap {
             }
         }
 
-        // Set configs for necessary folders. Or reset if the folder was deleted.
-        for conf in [
-            Config::ConfiguredSentboxFolder,
-            Config::ConfiguredTrashFolder,
-        ] {
-            let val = folder_configs.get(&conf).map(|s| s.as_str());
-            let interrupt = conf == Config::ConfiguredTrashFolder
-                && val.is_some()
-                && context.get_config(conf).await?.is_none();
-            context.set_config_internal(conf, val).await?;
-            if interrupt {
-                // `Imap::fetch_move_delete()` is possible now for other folders (NB: we are in the
-                // Inbox loop).
-                context.scheduler.interrupt_oboxes().await;
-            }
+        // Set config for the Trash folder. Or reset if the folder was deleted.
+        let conf = Config::ConfiguredTrashFolder;
+        let val = folder_configs.get(&conf).map(|s| s.as_str());
+        let interrupt = val.is_some() && context.get_config(conf).await?.is_none();
+        context.set_config_internal(conf, val).await?;
+        if interrupt {
+            // `Imap::fetch_move_delete()`, particularly message deletion, is possible now for other
+            // folders (NB: we are in the Inbox loop).
+            context.scheduler.interrupt_oboxes().await;
         }
 
         info!(context, "Found folders: {folder_names:?}.");

src/sql/migrations.rs

@@ -401,19 +401,18 @@ UPDATE chats SET protected=1, type=120 WHERE type=130;"#,
         .await?;
     }
     if dbversion < 73 {
-        use Config::*;
         sql.execute(
             r#"
 CREATE TABLE imap_sync (folder TEXT PRIMARY KEY, uidvalidity INTEGER DEFAULT 0, uid_next INTEGER DEFAULT 0);"#,
 ()
         )
             .await?;
-        for c in &[
-            ConfiguredInboxFolder,
-            ConfiguredSentboxFolder,
-            ConfiguredMvboxFolder,
+        for c in [
+            "configured_inbox_folder",
+            "configured_sentbox_folder",
+            "configured_mvbox_folder",
         ] {
-            if let Some(folder) = context.get_config(*c).await? {
+            if let Some(folder) = context.sql.get_raw_config(c).await? {
                 let (uid_validity, last_seen_uid) =
                     imap::get_config_last_seen_uid(context, &folder).await?;
                 if last_seen_uid > 0 {