Decouple archive mailboxes from accounts

backend/02-database.go

@@ -35,7 +35,7 @@ type Account struct {
 	DstInsecure bool   `json:"dst_insecure"`
 	DstUser     string `json:"dst_user"` // archiv-hans-peter@dr-gold.com
 	DstPass     string `json:"dst_pass"`
-	MboxDir     string `json:"mbox_dir"` // Unterordner unter Cfg.MboxRoot; leer = Cfg.MboxRoot/Name
+	MboxDir     string `json:"mbox_dir"` // optionaler Name aus archive_mailboxes unter Cfg.MboxRoot
 	Active      bool   `json:"active"`
 }
 
@@ -54,6 +54,8 @@ type AppUser struct {
 //
 //	accounts(...)                          -- die Umzugs-Zeilen (oben), inkl.
 //	                                          src_security/src_insecure etc.
+//	archive_mailboxes(name)                -- lokale/importierte Archiv-mboxen,
+//	                                          unabhaengig von Quell/Ziel-Konten.
 //	folder_map(account_id, src, dst)       -- optionales manuelles Umbenennen
 //	                                          (Vorrang vor der Rollen-Automatik
 //	                                          aus 11-folders.go)
@@ -94,6 +96,11 @@ func ConnectDB() error {
 			mbox_dir TEXT NOT NULL DEFAULT '',
 			active INTEGER NOT NULL DEFAULT 1
 		)`,
+		`CREATE TABLE IF NOT EXISTS archive_mailboxes(
+			id INTEGER PRIMARY KEY AUTOINCREMENT,
+			name TEXT NOT NULL UNIQUE,
+			created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
+		)`,
 		`CREATE TABLE IF NOT EXISTS folder_map(
 			id INTEGER PRIMARY KEY AUTOINCREMENT,
 			account_id INTEGER NOT NULL REFERENCES accounts(id) ON DELETE CASCADE,
@@ -153,6 +160,10 @@ func ConnectDB() error {
 		_ = db.Close()
 		return err
 	}
+	if err := seedArchiveMailboxesFromFS(); err != nil {
+		_ = db.Close()
+		return err
+	}
 	return nil
 }
 
@@ -393,6 +404,58 @@ func DeleteAccount(name string) error {
 	return err
 }
 
+func ListArchiveMailboxes() ([]string, error) {
+	rows, err := DB.Query(`SELECT name FROM archive_mailboxes ORDER BY lower(name), name`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []string
+	for rows.Next() {
+		var name string
+		if err := rows.Scan(&name); err != nil {
+			return nil, err
+		}
+		out = append(out, name)
+	}
+	return out, rows.Err()
+}
+
+func SaveArchiveMailbox(name string) error {
+	name = strings.TrimSpace(name)
+	if name == "" {
+		return fmt.Errorf("Name der Archiv-Mailbox fehlt.")
+	}
+	_, err := DB.Exec(`INSERT OR IGNORE INTO archive_mailboxes(name) VALUES(?)`, name)
+	return err
+}
+
+func DeleteArchiveMailbox(name string) error {
+	_, err := DB.Exec(`DELETE FROM archive_mailboxes WHERE name=?`, strings.TrimSpace(name))
+	return err
+}
+
+func seedArchiveMailboxesFromFS() error {
+	if Cfg.MboxRoot == "" {
+		return nil
+	}
+	entries, err := os.ReadDir(Cfg.MboxRoot)
+	if os.IsNotExist(err) {
+		return nil
+	}
+	if err != nil {
+		return err
+	}
+	for _, entry := range entries {
+		if entry.IsDir() {
+			if err := SaveArchiveMailbox(entry.Name()); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
 func AlreadyCopied(accountID int64, folder, messageID string) (bool, error) {
 	if messageID == "" {
 		return false, nil
@@ -468,9 +531,7 @@ func normalizeAccount(a *Account) {
 			a.DstPort = 143
 		}
 	}
-	if a.MboxDir == "" {
-		a.MboxDir = a.Name
-	}
+	a.MboxDir = strings.TrimSpace(a.MboxDir)
 }
 
 func scanAppUser(s appUserScanner) (AppUser, error) {