From aa9258e3af7bf2be561e05e53ab766838f61500d Mon Sep 17 00:00:00 2001
From: fbachus <felix.bachstein@gmail.com>
Date: Thu, 30 Jul 2026 15:11:04 +0200
Subject: [PATCH] feat(transport_helper): add function to query multiple
 journeys

could query all, but the last 40 should be fine, no?
could raise to no limit, but should be done as generator for that
---
 lib/main.dart             |  2 +-
 lib/transport_helper.dart | 24 +++++++++++++++++++++++-
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/lib/main.dart b/lib/main.dart
index 134e900..c8eef6d 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -517,7 +517,7 @@ class _JourneyOverviewPageState extends State<JourneyOverviewPage> {
   initState() async {
     super.initState();
     // TODO: implement batch query to get a list (all) of journeys
-    //allJourneys = await Journey.dbGetAll();
+    allJourneys = await Journey.dbGetAll();
   }
 
   @override
diff --git a/lib/transport_helper.dart b/lib/transport_helper.dart
index 3967d87..d1548ba 100644
--- a/lib/transport_helper.dart
+++ b/lib/transport_helper.dart
@@ -220,6 +220,27 @@ class Journey {
     return route;
   }
 
+  /// gets routesegments and hands them to the Journey.fromMap factory, works async
+  static Future<Journey> fromMapWrapper(Map<String, Object?> journeyMap) async {
+    Future<List<Segment>> segs = _dbGetJourneySegments(journeyMap["id"] as int);
+    Journey res = Journey.fromMap(journeyMap, await segs);
+    return res;
+  }
+
+  // TODO: could make this a generator and use batched queries, probably
+  // query all journeys
+  // _dbGetJourneySegments -> give list of segments for each journey
+  // map all journeys
+  static Future<List<Journey>> dbGetAll({int num = 40, int offset = 0}) async {
+    //final batch = DbHelper.db.batch; // later
+    Database database = DbHelper.db;
+    var tmp = await database.query(tableName, limit: num, offset: offset);
+    Future<List<Journey>> journeys = Future.wait(
+      tmp.map((jour) => fromMapWrapper(jour)),
+    );
+    return journeys;
+  }
+
   static Future<List<Segment>> _dbGetJourneySegments(
     int routeId,
   ) async {
@@ -454,6 +475,7 @@ class Segment {
     """);
   }
 
+  //TODO: support batches
   static Future<Segment> dbGet(int id) async {
     Database database = DbHelper.db;
     String vehicle = Vehicle.tableName;
@@ -1149,4 +1171,4 @@ enum VehicleType {
   subway,
   regionalTrain,
   PLACEHOLDER,
-}
+}
\ No newline at end of file