anotherim-desktop/plugins/omemo/src/database.vala

using Gee;
using Qlite;

using Dino.Entities;

namespace Dino.Plugins.Omemo {

public class Database : Qlite.Database {
    private const int VERSION = 0;

    public class IdentityTable : Table {
        public Column<int> id = new Column.Integer("id") { primary_key = true, auto_increment = true };
        public Column<int> account_id = new Column.Integer("account_id") { unique = true, not_null = true };
        public Column<int> device_id = new Column.Integer("device_id") { not_null = true };
        public Column<string> identity_key_private_base64 = new Column.NonNullText("identity_key_private_base64");
        public Column<string> identity_key_public_base64 = new Column.NonNullText("identity_key_public_base64");

        internal IdentityTable(Database db) {
            base(db, "identity");
            init({id, account_id, device_id, identity_key_private_base64, identity_key_public_base64});
        }
    }

    public class SignedPreKeyTable : Table {
        public Column<int> identity_id = new Column.Integer("identity_id") { not_null = true };
        public Column<int> signed_pre_key_id = new Column.Integer("signed_pre_key_id") { not_null = true };
        public Column<string> record_base64 = new Column.NonNullText("record_base64");

        internal SignedPreKeyTable(Database db) {
            base(db, "signed_pre_key");
            init({identity_id, signed_pre_key_id, record_base64});
            unique({identity_id, signed_pre_key_id});
        }
    }

    public class PreKeyTable : Table {
        public Column<int> identity_id = new Column.Integer("identity_id") { not_null = true };
        public Column<int> pre_key_id = new Column.Integer("pre_key_id") { not_null = true };
        public Column<string> record_base64 = new Column.NonNullText("record_base64");

        internal PreKeyTable(Database db) {
            base(db, "pre_key");
            init({identity_id, pre_key_id, record_base64});
            unique({identity_id, pre_key_id});
        }
    }

    public class SessionTable : Table {
        public Column<int> identity_id = new Column.Integer("identity_id") { not_null = true };
        public Column<string> address_name = new Column.NonNullText("name");
        public Column<int> device_id = new Column.Integer("device_id") { not_null = true };
        public Column<string> record_base64 = new Column.NonNullText("record_base64");

        internal SessionTable(Database db) {
            base(db, "session");
            init({identity_id, address_name, device_id, record_base64});
            unique({identity_id, address_name, device_id});
        }
    }
    public IdentityTable identity { get; private set; }
    public SignedPreKeyTable signed_pre_key { get; private set; }
    public PreKeyTable pre_key { get; private set; }
    public SessionTable session { get; private set; }

    public Database(string fileName) throws DatabaseError {
        base(fileName, VERSION);
        identity = new IdentityTable(this);
        signed_pre_key = new SignedPreKeyTable(this);
        pre_key = new PreKeyTable(this);
        session = new SessionTable(this);
        init({identity, signed_pre_key, pre_key, session});
    }

    public override void migrate(long oldVersion) {
        // new table columns are added, outdated columns are still present
    }
}

}