refactor: rename automatic_relay_management to autorelay

"automatic_relay_management" is a long unwiedly name with no UI using the mode yet,
so let's rename it to something more succinct: autorelay

src/autorelay.rs

@@ -1,3 +1,18 @@
+//! # Automatic relay handling (experimental, still in development)
+//!
+//! Chatmail relays create an account on first login,
+//! so a profile can add further transports on its own without user interaction.
+//! Candidate hosts come from the `relay_candidates` table,
+//! which migrations seed with a list of known chatmail relays.
+//!
+//! Status of implementation:
+//! Additions are attempted right before going into IMAP IDLE,
+//! i.e. only while connected and with nothing more important to do,
+//! and only if a UI opted in via [`Config::Autorelay`].
+//! Once a profile has reached `NUM_TRANSPORTS_TARGET` transports,
+//! [`Config::AutorelayFinished`] is set and nothing is ever added again,
+//! so deleting a transport later does not pull in a replacement.
+
 use std::pin::Pin;
 
 use anyhow::Result;
@@ -46,9 +61,7 @@ async fn maybe_add_additional_relays_inner(context: &Context, skip_network: bool
         // Housekeeping or automatic relay management is already running in another thread, do nothing.
         return Ok(false);
     };
-    let last_timestamp = context
+    let last_timestamp = context.get_config_i64(Config::LastAutorelay).await?;
-        .get_config_i64(Config::LastAutomaticRelayManagement)
-        .await?;
     if last_timestamp > now {
         warn!(
             context,
@@ -57,22 +70,16 @@ async fn maybe_add_additional_relays_inner(context: &Context, skip_network: bool
     } else if last_timestamp > now.saturating_sub(AUTOMATIC_ADDITION_DEBOUNCE_SECONDS) {
         return Ok(false);
     }
-    if !context
+    if !context.get_config_bool(Config::Autorelay).await? {
-        .get_config_bool(Config::AutomaticRelayManagement)
-        .await?
-    {
         return Ok(false);
     }
-    if context
+    if context.get_config_bool(Config::AutorelayFinished).await? {
-        .get_config_bool(Config::AutomaticRelayManagementFinished)
-        .await?
-    {
         return Ok(false);
     }
     // Set the config at the beginning to avoid endless loops.
     // Race conditions are not a concern because we locked the mutex.
     context
-        .set_config_internal(Config::LastAutomaticRelayManagement, Some(&now.to_string()))
+        .set_config_internal(Config::LastAutorelay, Some(&now.to_string()))
         .await?;
 
     let mut relay_added = false;
@@ -80,10 +87,7 @@ async fn maybe_add_additional_relays_inner(context: &Context, skip_network: bool
     for _ in 0..NUM_TRANSPORTS_TARGET {
         if context.count_transports().await? >= NUM_TRANSPORTS_TARGET {
             context
-                .set_config_internal(
+                .set_config_internal(Config::AutorelayFinished, config::from_bool(true))
-                    Config::AutomaticRelayManagementFinished,
-                    config::from_bool(true),
-                )
                 .await?;
 
             return Ok(relay_added);
@@ -175,4 +179,4 @@ pub(crate) fn login_param_from_host(host: &str) -> EnteredLoginParam {
 }
 
 #[cfg(test)]
-mod automatic_relay_management_tests;
+mod autorelay_tests;

src/autorelay/autorelay_tests.rs

@@ -73,12 +73,9 @@ async fn test_load_relay_candidates_multiple() -> Result<()> {
     Ok(())
 }
 
-async fn assert_automatic_relay_management_does_nothing(t: &TestContext) {
+async fn assert_autorelay_does_nothing(t: &TestContext) {
     let transports_before = t.count_transports().await.unwrap();
-    let config_before = t
+    let config_before = t.get_config_i64(Config::LastAutorelay).await.unwrap();
-        .get_config_i64(Config::LastAutomaticRelayManagement)
-        .await
-        .unwrap();
 
     let skip_network = false; // No need to skip network, nothing is supposed to happen
     let relay_added = maybe_add_additional_relays_inner(t, skip_network)
@@ -86,10 +83,7 @@ async fn assert_automatic_relay_management_does_nothing(t: &TestContext) {
         .unwrap();
     assert_eq!(relay_added, false);
 
-    let config_after = t
+    let config_after = t.get_config_i64(Config::LastAutorelay).await.unwrap();
-        .get_config_i64(Config::LastAutomaticRelayManagement)
-        .await
-        .unwrap();
     let transports_after = t.count_transports().await.unwrap();
 
     assert_eq!(config_after, config_before);
@@ -105,7 +99,7 @@ async fn test_maybe_add_additional_relays_mutex_held() -> Result<()> {
     // already running housekeeping or relay management.
     let _lock = t.background_task_mutex.lock().await;
 
-    assert_automatic_relay_management_does_nothing(t).await;
+    assert_autorelay_does_nothing(t).await;
 
     Ok(())
 }
@@ -117,13 +111,10 @@ async fn test_maybe_add_additional_relays_debounce() -> Result<()> {
     let some_seconds_ago = time() - 10;
 
     // Pretend automatic relay management just ran.
-    t.set_config_internal(
+    t.set_config_internal(Config::LastAutorelay, Some(&some_seconds_ago.to_string()))
-        Config::LastAutomaticRelayManagement,
+        .await?;
-        Some(&some_seconds_ago.to_string()),
-    )
-    .await?;
 
-    assert_automatic_relay_management_does_nothing(t).await;
+    assert_autorelay_does_nothing(t).await;
 
     Ok(())
 }
@@ -132,7 +123,7 @@ async fn test_maybe_add_additional_relays_debounce() -> Result<()> {
 async fn test_maybe_add_additional_relays_disabled() {
     // By default, automatic relay management is disabled:
     let t = &TestContext::new_alice().await;
-    assert_automatic_relay_management_does_nothing(t).await;
+    assert_autorelay_does_nothing(t).await;
 }
 
 /// Runs maybe_add_additional_relays_inner(), then deletes one of the transports.
@@ -158,11 +149,8 @@ async fn test_maybe_add_additional_relays_does_nothing_after_finishing_once() ->
     let transports_count = t.count_transports().await?;
     assert_eq!(transports_count, NUM_TRANSPORTS_TARGET - 1);
 
-    assert!(
+    assert!(t.get_config_bool(Config::AutorelayFinished).await?);
-        t.get_config_bool(Config::AutomaticRelayManagementFinished)
+    assert_autorelay_does_nothing(t).await;
-            .await?
-    );
-    assert_automatic_relay_management_does_nothing(t).await;
 
     Ok(())
 }
@@ -187,9 +175,7 @@ async fn test_maybe_add_additional_relays_add_one() -> Result<()> {
     let relay_added = maybe_add_additional_relays_inner(t, skip_network).await?;
     assert!(relay_added);
 
-    let config_after = t
+    let config_after = t.get_config_i64(Config::LastAutorelay).await?;
-        .get_config_i64(Config::LastAutomaticRelayManagement)
-        .await?;
     assert!(config_after >= now);
 
     let transports_after = t.count_transports().await?;
@@ -218,9 +204,7 @@ async fn test_maybe_add_additional_relays_add_multiple() -> Result<()> {
     let relay_added = maybe_add_additional_relays_inner(t, skip_network).await?;
     assert!(relay_added);
 
-    let config_after = t
+    let config_after = t.get_config_i64(Config::LastAutorelay).await?;
-        .get_config_i64(Config::LastAutomaticRelayManagement)
-        .await?;
     assert!(config_after >= now);
 
     let transports_after = t.count_transports().await?;
@@ -253,9 +237,7 @@ async fn test_maybe_add_additional_relays_failure() -> Result<()> {
     assert_eq!(relay_added, false);
 
     // The config is still updated:
-    let config_after = t
+    let config_after = t.get_config_i64(Config::LastAutorelay).await?;
-        .get_config_i64(Config::LastAutomaticRelayManagement)
-        .await?;
     assert!(config_after >= now);
 
     let transports_after = t.count_transports().await?;
@@ -286,7 +268,7 @@ async fn test_maybe_add_additional_relays_failure() -> Result<()> {
 
 async fn enable_config(context: &Context) {
     context
-        .set_config_bool(Config::AutomaticRelayManagement, true)
+        .set_config_bool(Config::Autorelay, true)
         .await
         .unwrap();
 }

src/config.rs

@@ -353,13 +353,13 @@ pub enum Config {
     LastCantDecryptOutgoingMsgs,
 
     /// Timestamp of the last time automatic relay management was run
-    LastAutomaticRelayManagement,
+    LastAutorelay,
 
     /// Whether to automatically add/remove transports
-    AutomaticRelayManagement,
+    Autorelay,
 
     /// Whether automatic relay management successfully added the desired number of relays
-    AutomaticRelayManagementFinished,
+    AutorelayFinished,
 
     /// Whether to avoid using IMAP IDLE even if the server supports it.
     ///

src/configure.rs

@@ -749,7 +749,7 @@ mod tests {
     use crate::tools::SystemTime;
 
     use super::*;
-    use crate::automatic_relay_management::login_param_from_host;
+    use crate::autorelay::login_param_from_host;
     use crate::config::Config;
     use crate::login_param::EnteredImapLoginParam;
     use crate::sql::update_transport_last_rcvd_timestamp;

src/context.rs

@@ -1047,20 +1047,18 @@ impl Context {
                 .to_string(),
         );
         res.insert(
-            "last_automatic_relay_management",
+            "last_autorelay",
-            self.get_config_i64(Config::LastAutomaticRelayManagement)
+            self.get_config_i64(Config::LastAutorelay)
                 .await?
                 .to_string(),
         );
         res.insert(
-            "automatic_relay_management",
+            "autorelay",
-            self.get_config_bool(Config::AutomaticRelayManagement)
+            self.get_config_bool(Config::Autorelay).await?.to_string(),
-                .await?
-                .to_string(),
         );
         res.insert(
-            "automatic_relay_management_finished",
+            "autorelay_finished",
-            self.get_config_bool(Config::AutomaticRelayManagementFinished)
+            self.get_config_bool(Config::AutorelayFinished)
                 .await?
                 .to_string(),
         );

src/imap/idle.rs

@@ -53,9 +53,9 @@ impl Session {
 
         // we try to add additional relays right before going into IDLE mode,
         // because we are connected and don't have anything important to do.
-        tokio::task::spawn(
+        tokio::task::spawn(crate::autorelay::maybe_add_additional_relays(
-            crate::automatic_relay_management::maybe_add_additional_relays(context.clone()),
+            context.clone(),
-        );
+        ));
 
         let mut handle = self.inner.idle();
         handle

src/lib.rs

@@ -55,7 +55,7 @@ pub use events::*;
 
 mod aheader;
 pub mod appversions;
-mod automatic_relay_management;
+mod autorelay;
 pub mod blob;
 pub mod calls;
 pub mod chat;

src/qr.rs

@@ -11,7 +11,7 @@ use deltachat_contact_tools::{ContactAddress, addr_normalize, may_be_valid_addr}
 use percent_encoding::{NON_ALPHANUMERIC, percent_decode_str, percent_encode};
 use serde::Deserialize;
 
-use crate::automatic_relay_management::login_param_from_host;
+use crate::autorelay::login_param_from_host;
 use crate::config::Config;
 use crate::contact::{Contact, ContactId, Origin};
 use crate::context::Context;