api!: Contact::get_color(): Preserve address-based color hue for SELF

4010c60e7b "feat: use key fingerprints for color generation" changes
colors for contacts including SELF. Even if an avatar is set, the self-color is visible in
e.g. replies to outgoing messages.

This adds `Config::Selfcolor` and sets it in a migration. This doesn't preserve the old
address-based color accurately because the old code generating colors is already dropped, so this
only preserves the color angle (hue).

deltachat-ffi/src/lib.rs

@@ -4311,7 +4311,8 @@ pub unsafe extern "C" fn dc_contact_get_color(contact: *mut dc_contact_t) -> u32
         return 0;
     }
     let ffi_contact = &*contact;
-    ffi_contact.contact.get_color()
+    let ctx = &*ffi_contact.context;
+    block_on(ffi_contact.contact.get_color(ctx)).unwrap_or_log_default(ctx, "Failed get_color")
 }
 
 #[no_mangle]

deltachat-jsonrpc/src/api/types/account.rs

@@ -32,7 +32,10 @@ impl Account {
             let addr = ctx.get_config(Config::Addr).await?;
             let profile_image = ctx.get_config(Config::Selfavatar).await?;
             let color = color_int_to_hex_string(
-                Contact::get_by_id(ctx, ContactId::SELF).await?.get_color(),
+                Contact::get_by_id(ctx, ContactId::SELF)
+                    .await?
+                    .get_color(ctx)
+                    .await?,
             );
             let private_tag = ctx.get_config(Config::PrivateTag).await?;
             Ok(Account::Configured {

deltachat-jsonrpc/src/api/types/contact.rs

@@ -97,7 +97,7 @@ impl ContactObject {
 
         Ok(ContactObject {
             address: contact.get_addr().to_owned(),
-            color: color_int_to_hex_string(contact.get_color()),
+            color: color_int_to_hex_string(contact.get_color(context).await?),
             auth_name: contact.get_authname().to_owned(),
             status: contact.get_status().to_owned(),
             display_name: contact.get_display_name().to_owned(),

deltachat-jsonrpc/src/api/types/message.rs

@@ -162,7 +162,9 @@ impl MessageObject {
                         message_id: quote.get_id().to_u32(),
                         chat_id: quote.get_chat_id().to_u32(),
                         author_display_name: quote_author.get_display_name().to_owned(),
-                        author_display_color: color_int_to_hex_string(quote_author.get_color()),
+                        author_display_color: color_int_to_hex_string(
+                            quote_author.get_color(context).await?,
+                        ),
                         override_sender_name: quote.get_override_sender_name(),
                         image: if quote.get_viewtype() == Viewtype::Image
                             || quote.get_viewtype() == Viewtype::Gif
@@ -581,7 +583,7 @@ impl MessageSearchResult {
             id: msg_id.to_u32(),
             author_profile_image: profile_image,
             author_name,
-            author_color: color_int_to_hex_string(sender.get_color()),
+            author_color: color_int_to_hex_string(sender.get_color(context).await?),
             author_id: sender.id.to_u32(),
             chat_id: chat.id.to_u32(),
             chat_name: chat.get_name().to_owned(),

src/chat.rs

@@ -1807,7 +1807,7 @@ impl Chat {
             let contacts = get_chat_contacts(context, self.id).await?;
             if let Some(contact_id) = contacts.first() {
                 if let Ok(contact) = Contact::get_by_id(context, *contact_id).await {
-                    color = contact.get_color();
+                    color = contact.get_color(context).await?;
                 }
             }
         } else if !self.grpid.is_empty() {

src/config.rs

@@ -136,6 +136,9 @@ pub enum Config {
     /// Own name to use in the `From:` field when sending messages.
     Displayname,
 
+    /// Own color to use in the avatar placeholder and replies to outgoing messages.
+    Selfcolor,
+
     /// Own status to display, sent in message footer.
     Selfstatus,
 
@@ -474,6 +477,7 @@ impl Config {
                 | Self::MvboxMove
                 | Self::ShowEmails
                 | Self::Selfavatar
+                | Self::Selfcolor
                 | Self::Selfstatus,
         )
     }
@@ -833,7 +837,7 @@ impl Context {
         }
         if matches!(
             key,
-            Config::Displayname | Config::Selfavatar | Config::PrivateTag
+            Config::Displayname | Config::Selfavatar | Config::Selfcolor | Config::PrivateTag
         ) {
             self.emit_event(EventType::AccountsItemChanged);
         }

src/config/config_tests.rs

@@ -245,6 +245,7 @@ async fn test_sync() -> Result<()> {
         Ok(())
     }
     test_config_str(&alice0, &alice1, Config::Displayname, "Alice Sync").await?;
+    test_config_str(&alice0, &alice1, Config::Selfcolor, "255").await?;
     test_config_str(&alice0, &alice1, Config::Selfstatus, "My status").await?;
 
     assert!(alice0.get_config(Config::Selfavatar).await?.is_none());

src/contact.rs

@@ -1579,11 +1579,17 @@ impl Contact {
     /// or email address (for address-contacts) and can be used
     /// for an fallback avatar with white initials
     /// as well as for headlines in bubbles of group chats.
-    pub fn get_color(&self) -> u32 {
+    pub async fn get_color(&self, context: &Context) -> Result<u32> {
+        if self.id == ContactId::SELF {
+            if let Some(v) = context.get_config_opt_parsed(Config::Selfcolor).await? {
+                return Ok(v);
+            }
+        }
+
         if let Some(fingerprint) = self.fingerprint() {
-            str_to_color(&fingerprint.hex())
+            Ok(str_to_color(&fingerprint.hex()))
         } else {
-            str_to_color(&self.addr.to_lowercase())
+            Ok(str_to_color(&self.addr.to_lowercase()))
         }
     }
 

src/contact/contact_tests.rs

@@ -758,17 +758,26 @@ async fn test_lookup_id_by_addr() {
 async fn test_contact_get_color() -> Result<()> {
     let t = TestContext::new().await;
     let contact_id = Contact::create(&t, "name", "name@example.net").await?;
-    let color1 = Contact::get_by_id(&t, contact_id).await?.get_color();
+    let color1 = Contact::get_by_id(&t, contact_id)
+        .await?
+        .get_color(&t)
+        .await?;
     assert_eq!(color1, 0x4947dc);
 
     let t = TestContext::new().await;
     let contact_id = Contact::create(&t, "prename name", "name@example.net").await?;
-    let color2 = Contact::get_by_id(&t, contact_id).await?.get_color();
+    let color2 = Contact::get_by_id(&t, contact_id)
+        .await?
+        .get_color(&t)
+        .await?;
     assert_eq!(color2, color1);
 
     let t = TestContext::new().await;
     let contact_id = Contact::create(&t, "Name", "nAme@exAmple.NET").await?;
-    let color3 = Contact::get_by_id(&t, contact_id).await?.get_color();
+    let color3 = Contact::get_by_id(&t, contact_id)
+        .await?
+        .get_color(&t)
+        .await?;
     assert_eq!(color3, color1);
     Ok(())
 }

src/context/context_tests.rs

@@ -277,6 +277,7 @@ async fn test_get_info_completeness() {
         "mail_security",
         "notify_about_wrong_pw",
         "self_reporting_id",
+        "selfcolor",
         "selfstatus",
         "send_server",
         "send_user",

src/qr_code_generator.rs

@@ -161,7 +161,7 @@ async fn self_info(context: &Context) -> Result<(Option<Vec<u8>>, String, String
         None => contact.get_addr().to_string(),
     };
     let addr = contact.get_addr().to_string();
-    let color = color_int_to_hex_string(contact.get_color());
+    let color = color_int_to_hex_string(contact.get_color(context).await?);
     Ok((avatar, displayname, addr, color))
 }
 

src/sql/migrations.rs

@@ -1261,6 +1261,30 @@ CREATE INDEX gossip_timestamp_index ON gossip_timestamp (chat_id, fingerprint);
         .await?;
     }
 
+    inc_and_check(&mut migration_version, 134)?;
+    if dbversion < migration_version {
+        let trans_fn = |t: &mut rusqlite::Transaction| {
+            let Some(addr): Option<String> = t
+                .query_row(
+                    "SELECT value FROM config WHERE keyname='configured_addr'",
+                    (),
+                    |row| row.get(0),
+                )
+                .optional()?
+            else {
+                return Ok(());
+            };
+            let color = crate::color::str_to_color(&addr.to_lowercase());
+            t.execute(
+                "INSERT OR IGNORE INTO config (keyname, value) VALUES ('selfcolor', ?)",
+                (color,),
+            )?;
+            Ok(())
+        };
+        sql.execute_migration_transaction(trans_fn, migration_version)
+            .await?;
+    }
+
     let new_version = sql
         .get_raw_config_int(VERSION_CFG)
         .await?

src/webxdc/maps_integration.rs

@@ -112,7 +112,7 @@ pub(crate) async fn intercept_get_updates(
                 hash_map::Entry::Vacant(e) => {
                     let contact = Contact::get_by_id(context, location.contact_id).await?;
                     let name = contact.get_display_name().to_string();
-                    let color = color_int_to_hex_string(contact.get_color());
+                    let color = color_int_to_hex_string(contact.get_color(context).await?);
                     e.insert((name, color)).clone()
                 }
                 hash_map::Entry::Occupied(e) => e.get().clone(),