feat(database): add queries for all tables

lib/transport_helper.dart

@@ -76,6 +76,17 @@ class Route {
     return tmp;
   }
 
+  factory Route.fromMap(
+    Map<String, Object?> routeMaps,
+    List<Segment> segmentMaps,
+  ) {
+    return Route(
+      id: routeMaps["id"] as int,
+      segments: segmentMaps,
+      duration: Duration(minutes: 0),
+    );
+  }
+
   // from trip API request
   // TODO: how to connect this best with the database for read/write?
   factory Route.fromJson(Map<String, dynamic> json) {
@@ -111,6 +122,32 @@ class Route {
     """);
   }
 
+  static Future<Route> dbGet(int id) async {
+    Database database = DbHelper.db;
+    Future<List<Segment>> routeSegments = dbGetRouteSegments(id);
+    var result = await database.query(
+      "route",
+      where: "id = ?",
+      whereArgs: [id],
+    );
+    assert(result.length < 2, "found more than 1 route for id $id");
+    Route route = Route.fromMap(result.first, await routeSegments);
+    return route;
+  }
+
+  static Future<List<Segment>> dbGetRouteSegments(
+    int routeId,
+  ) async {
+    Database database = DbHelper.db;
+    var tmp = await database.rawQuery("""
+        SELECT * FROM segments
+        JOIN routesegments ON routesegments.segmentid = segments.id
+        WHERE routesegments.route = $routeId
+        ORDER BY routesegments.segmentorder ASC;
+        """);
+    return tmp.map((x) => Segment.fromMap(x)).toList();
+  }
+
   void dbInsert() async {
     Database database = DbHelper.db;
     id = await database.insert(
@@ -193,6 +230,17 @@ class Segment {
     };
   }
 
+  factory Segment.fromMap(Map<String, Object?> map) {
+    return Segment(
+      id: map["id"] as int,
+      startPoint: map["startPoint"] as Station,
+      endPoint: map["endPoint"] as Station,
+      startTime: map["startTime"] as DateTime,
+      endTime: map["endTime"] as DateTime,
+      vehicle: map["vehicle"] as Vehicle,
+    );
+  }
+
   factory Segment.fromJson(Map<String, dynamic> json) {
     Database database = DbHelper.db;
     Segment tmp = Segment(
@@ -224,6 +272,21 @@ class Segment {
     """);
   }
 
+  static Future<Segment> dbGet(int id) async {
+    Database database = DbHelper.db;
+    var tmp = await database.query(tableName, where: "id = ?", whereArgs: [id]);
+    var seg = tmp.map((x) => Segment.fromMap(x));
+    //since we are querying for the primary key, this list should never be > 1
+    assert(seg.length < 2, "found more than one segment for id $id");
+    return seg.first;
+  }
+
+  static Future<List<Segment>> dbGetAll() async {
+    Database database = DbHelper.db;
+    var seglist = await database.query(tableName);
+    return seglist.map((seg) => Segment.fromMap(seg)).toList();
+  }
+
   void dbInsert() async {
     Database database = DbHelper.db;
     id = await database.insert(tableName, toMap());
@@ -244,7 +307,7 @@ class Station {
 
   String id;
   String name;
-  List<Line> transportLines; // could be normalized away
+  List<Line> transportLines = List.empty(); // could be normalized away
 
   Station({
     required this.id,
@@ -264,6 +327,17 @@ class Station {
         .toList();
   }
 
+  factory Station.fromMap(
+    Map<String, Object?> map, {
+    List<Line>? stationLines,
+  }) {
+    return Station(
+      id: map["id"] as String,
+      name: map["name"] as String,
+      transportLines: stationLines ?? List.empty(),
+    );
+  }
+
   factory Station.fromJson(Map<String, dynamic> json) => Station(
     id: json["id"] as String? ?? json["extId"] as String,
     name: json["name"],
@@ -295,6 +369,30 @@ class Station {
     """);
   }
 
+  static Future<Station> dbGet(String stationId) async {
+    Database database = DbHelper.db;
+    var stationLines = dbGetStationLines(stationId);
+    var stationMap = await database.query(
+      tableName,
+      where: "stationid = ?",
+      whereArgs: [stationId],
+    );
+    var station = Station.fromMap(stationMap.first);
+    station.transportLines = await stationLines;
+    return station;
+  }
+
+  static Future<List<Line>> dbGetStationLines(String stationId) async {
+    Database database = DbHelper.db;
+    var lines = await database.rawQuery("""
+        SELECT * FROM lines
+        JOIN stationlines sl ON sl.lineid = line.id
+        WHERE stationlines.stationid = $stationId
+        ORDER BY line.id ASC;
+        """);
+    return lines.map((x) => Line.fromMap(x)).toList();
+  }
+
   void dbInsert() async {
     Database database = DbHelper.db;
     database.insert(tableName, toMap());
@@ -324,25 +422,34 @@ class Vehicle {
   static const String tableName = "vehicle";
 
   String id;
-  Line line;
+  String vehicleLineId;
 
   Vehicle({
     required this.id,
-    required this.line,
+    required this.vehicleLineId,
   });
 
   Map<String, Object?> toMap() {
     return {
       "id": id,
-      "line": line.lineId,
+      "line": vehicleLineId,
     };
   }
 
+  factory Vehicle.fromMap(
+    Map<String, Object?> map,
+  ) {
+    return Vehicle(
+      id: map["id"] as String,
+      vehicleLineId: map["line"] as String,
+    );
+  }
+
   // we can use the "product" class from within any JSON response
   // (within hafas API, on the appropriate level)
   factory Vehicle.fromJson(Map<String, dynamic> json) => Vehicle(
     id: json["matchId"],
-    line: Line.fromJson(json),
+    vehicleLineId: Line.fromJson(json).lineId,
   );
 
   static void initVehicleTable() async {
@@ -356,6 +463,16 @@ class Vehicle {
     """);
   }
 
+  static Future<Vehicle> dbGet(String vehicleId) async {
+    Database database = DbHelper.db;
+    var vehicleMap = await database.query(
+      tableName,
+      where: "id = ?",
+      whereArgs: [vehicleId],
+    );
+    return Vehicle.fromMap(vehicleMap.first);
+  }
+
   void dbInsert() async {
     Database database = DbHelper.db;
     database.insert(tableName, toMap());
@@ -371,8 +488,8 @@ class Line {
   static const String tableName = "line";
 
   String lineId;
-  Station? destination;
-  Station? direction;
+  String? destination;
+  String? direction;
   VehicleType mode;
   String name;
   Color? fgColor;
@@ -380,6 +497,8 @@ class Line {
 
   Line({
     required this.lineId,
+    this.destination,
+    this.direction,
     required this.name,
     required this.mode,
     this.fgColor,
@@ -398,6 +517,18 @@ class Line {
     };
   }
 
+  factory Line.fromMap(Map<String, Object?> map) {
+    return Line(
+      lineId: map["lineId"] as String,
+      destination: map["destination"] as String,
+      direction: map["direction"] as String,
+      mode: map["mode"] as VehicleType,
+      name: map["name"] as String,
+      fgColor: map["fgcolor"] as Color,
+      bgColor: map["bgcolor"] as Color,
+    );
+  }
+
   // TODO: EXPLAIN!!!!!!!!!!!!
   static const _vehicleTypeAsCatCode = [
     VehicleType.metro,
@@ -431,6 +562,16 @@ class Line {
     """);
   }
 
+  static Future<Line> dbGet(String lineId) async {
+    Database database = DbHelper.db;
+    var tmp = await database.query(
+      tableName,
+      where: "lineid = ?",
+      whereArgs: [lineId],
+    );
+    return Line.fromMap(tmp.first);
+  }
+
   void dbInsert() async {
     Database database = DbHelper.db;
     database.insert(tableName, toMap());
@@ -447,26 +588,34 @@ class Departure {
   static const String tableName = "departure";
 
   int? id;
-  Vehicle vehicle;
-  Station station;
+  String vehicleId;
+  String stationId;
   DateTime departureTime;
 
   Departure({
     this.id,
-    required this.vehicle,
-    required this.station,
+    required this.vehicleId,
+    required this.stationId,
     required this.departureTime,
   });
 
   Map<String, Object?> toMap() {
     return {
       "id": id,
-      "vehicle": vehicle,
-      "station": station,
+      "vehicle": vehicleId,
+      "station": stationId,
       "departuretime": departureTime,
     };
   }
 
+  factory Departure.fromMap(Map<String, Object?> map) {
+    return Departure(
+      id: map["id"] as int,
+      vehicleId: map["vehicle"] as String,
+      stationId: map["station"] as String,
+      departureTime: map["departuretime"] as DateTime,
+    );
+  }
   static void initDepartureTable() async {
     Database database = DbHelper.db;
     String vehicle = Vehicle.tableName;
@@ -482,6 +631,53 @@ class Departure {
      """);
   }
 
+  static Future<List<Departure>> dbGetByVehicle(
+    String vehicleId, {
+    DateTime? intervalStart,
+  }) async {
+    Database database = DbHelper.db;
+    intervalStart ??= DateTime.now(); // assign if null
+    int limit = 50;
+    List results = await database.query(
+      tableName,
+      where: "vehicle= ? AND departuretime > ?",
+      whereArgs: [
+        vehicleId,
+        intervalStart,
+      ],
+      orderBy: "departuretime ASC",
+      limit: limit,
+    );
+    return results.map((dep) => Departure.fromMap(dep)).toList();
+  }
+
+  static Future<List<Departure>> dbGetByStation(
+    String stationId, {
+    DateTime? intervalStart,
+  }) async {
+    Database database = DbHelper.db;
+    intervalStart ??= DateTime.now(); // assign if null
+    int limit = 50;
+    List results = await database.query(
+      tableName,
+      where: "station = ? AND departuretime > ?",
+      whereArgs: [stationId, intervalStart],
+      orderBy: "departuretime",
+      limit: limit,
+    );
+    return results.map((dep) => Departure.fromMap(dep)).toList();
+  }
+
+  static Future<Departure> dbGet(int id) async {
+    Database database = DbHelper.db;
+    var depMap = await database.query(
+      tableName,
+      where: "id = ?",
+      whereArgs: [id],
+    );
+    return Departure.fromMap(depMap.first);
+  }
+
   void dbInsert() async {
     Database database = DbHelper.db;
     id = await database.insert(tableName, toMap());