outsourced lots of api calls to api folder

centered error message when failed loading video feed
display server url on settings page

lib/preview/actor_feed.dart

@@ -1,11 +1,8 @@
-import 'dart:convert';
-
 import 'package:flutter/material.dart';
 
-import '../api/api.dart';
+import '../api/video_api.dart';
 import 'preview_grid.dart';
 import '../types/actor.dart';
-import '../types/video.dart';
 
 class ActorFeed extends StatefulWidget {
   const ActorFeed({Key? key, required this.actor}) : super(key: key);
@@ -16,22 +13,10 @@ class ActorFeed extends StatefulWidget {
 }
 
 class _ActorFeedState extends State<ActorFeed> {
-  Future<List<VideoT>> loadData() async {
-    final data = await API
-        .query("actor", "getActorInfo", {'ActorId': widget.actor.actorId});
-
-    final d = jsonDecode(data);
-
-    List<VideoT> dta =
-        (d['Videos'] as List).map((e) => VideoT.fromJson(e)).toList();
-
-    return dta;
-  }
-
   @override
   Widget build(BuildContext context) {
     return PreviewGrid(
-      videoLoader: () => loadData(),
+      videoLoader: () => loadVideoByActor(widget.actor),
     );
   }
 }

lib/preview/actor_tile.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:openmediacentermobile/preview/actor_feed.dart';
+import '../preview/actor_feed.dart';
 
 import '../utils/platform.dart';
 import '../types/actor.dart';

lib/preview/preview_grid.dart

@@ -56,15 +56,15 @@ class _PreviewGridState extends State<PreviewGrid> {
           builder:
               (BuildContext context, AsyncSnapshot<List<VideoT>> snapshot) {
             if (snapshot.hasError) {
-              return Column(
-                children: [
-                  Text("Error"),
-                  TextButton(
-                      onPressed: () {
-                        loadData();
-                      },
-                      child: Text("Reload page"))
-                ],
+              return Center(
+                child: Column(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: [
+                    Text("Error"),
+                    TextButton(
+                        onPressed: () => loadData(), child: Text("Reload page"))
+                  ],
+                ),
               );
             } else if (snapshot.hasData) {
               return _mainGrid(snapshot.data!, width);

lib/preview/preview_tile.dart

@@ -1,9 +1,8 @@
-import 'dart:convert';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:sqflite/sqflite.dart';
 
-import '../api/api.dart';
+import '../api/video_api.dart';
 import '../db/database.dart';
 import '../log/log.dart';
 import '../utils/platform.dart';
@@ -51,23 +50,17 @@ class _PreviewTileState extends State<PreviewTile> {
         );
   }
 
-  Future<Uint8List> _fetchThumbnail(int id) async {
-    final base64str =
-        await API.query("video", "readThumbnail", {'Movieid': id});
-    return base64Decode(base64str.substring(23));
-  }
-
   Future<Image> loadData() async {
     Uint8List data;
     final id = widget.dta.id;
     if (kIsWeb) {
-      data = await _fetchThumbnail(id);
+      data = await fetchThumbnail(id);
     } else {
       final List<Map<String, dynamic>> prev =
           await Db().db().query('previews', where: "id=$id");
 
       if (prev.isEmpty) {
-        data = await _fetchThumbnail(id);
+        data = await fetchThumbnail(id);
         insert(id, data);
         Log.d("Adding $id to db");
       } else {