make accounts sortable

deltachat-ffi/deltachat.h

@@ -3119,6 +3119,18 @@ dc_context_t*  dc_accounts_get_selected_account (dc_accounts_t* accounts);
 int            dc_accounts_select_account       (dc_accounts_t* accounts, uint32_t account_id);
 
 
+/**
+ * Move an account and change the order returned by dc_accounts_get_all().
+ *
+ * @param accounts
+ * @param to_move_id The account ID to move.
+ * @param predecessor_id `to_move_id` will be sorted below `predecessor_id`.
+ *      Set to 0 to move `to_move_id` to the top of the list returned by dc_accounts_get_all().
+ * @return 1=success, 0=error
+ */
+int            dc_accounts_move_below           (dc_accounts_t* accounts, uint32_t to_move_id, uint32_t predecessor_id);
+
+
 /**
  * Start job and IMAP/SMTP tasks for all accounts managed by the account manager.
  * If IO is already running, nothing happens.

deltachat-ffi/src/lib.rs

@@ -4703,6 +4703,35 @@ pub unsafe extern "C" fn dc_accounts_select_account(
     })
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn dc_accounts_move_below(
+    accounts: *mut dc_accounts_t,
+    to_move_id: u32,
+    predecessor_id: u32,
+) -> libc::c_int {
+    if accounts.is_null() {
+        eprintln!("ignoring careless call to dc_accounts_move_below()");
+        return 0;
+    }
+
+    let accounts = &*accounts;
+    let predecessor_id = if predecessor_id == 0 {
+        None
+    } else {
+        Some(predecessor_id)
+    };
+    block_on(async move {
+        let mut accounts = accounts.write().await;
+        match accounts.move_below(to_move_id, predecessor_id).await {
+            Ok(()) => 1,
+            Err(err) => {
+                accounts.emit_event(EventType::Error(format!("Failed to move account: {err:#}")));
+                0
+            }
+        }
+    })
+}
+
 #[no_mangle]
 pub unsafe extern "C" fn dc_accounts_add_account(accounts: *mut dc_accounts_t) -> u32 {
     if accounts.is_null() {