Update interactions

lib/core/lru_map.dart

@@ -1,5 +1,4 @@
 import 'dart:collection';
-import 'dart:typed_data';
 
 import 'package:flutter/material.dart';
 

lib/db/db_helper.dart

@@ -12,6 +12,7 @@ class DatabaseHelper {
   static final table = 'photos';
 
   static final columnLocalPath = 'local_path';
+  static final columnThumbnailPath = 'thumbnail_path';
   static final columnUrl = 'url';
   static final columnHash = 'hash';
   static final columnSyncTimestamp = 'sync_timestamp';
@@ -42,6 +43,7 @@ class DatabaseHelper {
     await db.execute('''
           CREATE TABLE $table (
             $columnLocalPath TEXT NOT NULL,
+            $columnThumbnailPath TEXT NOT NULL,
             $columnUrl TEXT,
             $columnHash TEXT NOT NULL,
             $columnSyncTimestamp TEXT
@@ -53,6 +55,7 @@ class DatabaseHelper {
     Database db = await instance.database;
     var row = new Map<String, dynamic>();
     row[columnLocalPath] = photo.localPath;
+    row[columnThumbnailPath] = photo.thumbnailPath;
     row[columnUrl] = photo.url;
     row[columnHash] = photo.hash;
     row[columnSyncTimestamp] = photo.syncTimestamp;

lib/models/photo.dart

@@ -1,11 +1,13 @@
 import 'dart:io';
 
 import 'package:crypto/crypto.dart';
+import 'package:image/image.dart';
 import 'package:photo_manager/photo_manager.dart';
 
 class Photo {
   String url;
   String localPath;
+  String thumbnailPath;
   String hash;
   int syncTimestamp;
 
@@ -18,6 +20,7 @@ class Photo {
 
   Photo.fromRow(Map<String, dynamic> row)
       : localPath = row["local_path"],
+        thumbnailPath = row["thumbnail_path"],
         url = row["url"],
         hash = row["hash"],
         syncTimestamp = row["sync_timestamp"] == null
@@ -28,6 +31,7 @@ class Photo {
     Photo photo = Photo();
     var file = (await asset.originFile);
     photo.localPath = file.path;
+    photo.thumbnailPath = getThumbnailPath(file.path);
     photo.hash = getHash(file);
     return photo;
   }
@@ -35,4 +39,12 @@ class Photo {
   static String getHash(File file) {
     return sha256.convert(file.readAsBytesSync()).toString();
   }
+
+  static String getThumbnailPath(String path) {
+    Image image = decodeImage(File(path).readAsBytesSync());
+    Image thumbnail = copyResize(image, width: 150);
+    String thumbnailPath = path + ".thumbnail";
+    File(thumbnailPath)..writeAsBytesSync(encodePng(thumbnail));
+    return thumbnailPath;
+  }
 }

lib/photo_sync_manager.dart

@@ -39,11 +39,17 @@ class PhotoSyncManager {
     if (lastDBUpdateTimestamp == null) {
       lastDBUpdateTimestamp = 0;
     }
-    for (AssetEntity asset in _assets) {
-      if (asset.createDateTime.millisecondsSinceEpoch > lastDBUpdateTimestamp) {
-        await insertPhotoToDB(await Photo.fromAsset(asset));
-      }
-    }
+    // for (AssetEntity asset in _assets) {
+    //   if (asset.createDateTime.millisecondsSinceEpoch > lastDBUpdateTimestamp) {
+    //     try {
+    //       var photo = await Photo.fromAsset(asset);
+    //       await DatabaseHelper.instance.insertPhoto(photo);
+    //     } catch (e) {
+    //       _logger.e(e);
+    //     }
+    //   }
+    // }
+    PhotoLoader.instance.reloadPhotos();
     return await prefs.setInt(
         _lastDBUpdateTimestampKey, DateTime.now().millisecondsSinceEpoch);
   }
@@ -98,7 +104,9 @@ class PhotoSyncManager {
             .download(_endpoint + photo.url, localPath)
             .catchError(_onError);
         photo.localPath = localPath;
-        await insertPhotoToDB(photo);
+        photo.thumbnailPath = Photo.getThumbnailPath(localPath);
+        await DatabaseHelper.instance.insertPhoto(photo);
+        PhotoLoader.instance.reloadPhotos();
       }
       await prefs.setInt(_lastSyncTimestampKey, photo.syncTimestamp);
     }
@@ -131,12 +139,6 @@ class PhotoSyncManager {
     return photo;
   }
 
-  Future<void> insertPhotoToDB(Photo photo) async {
-    _logger.i("Inserting to DB");
-    await DatabaseHelper.instance.insertPhoto(photo);
-    PhotoLoader.instance.reloadPhotos();
-  }
-
   void _onError(error) {
     _logger.e(error);
   }

lib/ui/gallery.dart

@@ -1,10 +1,12 @@
 import 'dart:io';
+import 'dart:math';
 
 import 'package:flutter/material.dart';
 import 'package:logger/logger.dart';
 import 'package:myapp/photo_loader.dart';
 import 'package:myapp/ui/image_widget.dart';
 import 'package:provider/provider.dart';
+import 'package:toast/toast.dart';
 
 import 'change_notifier_builder.dart';
 import 'detail_page.dart';
@@ -18,44 +20,67 @@ class Gallery extends StatefulWidget {
 
 class _GalleryState extends State<Gallery> {
   Logger _logger = Logger();
-  
+
+  int _crossAxisCount = 4;
+
   PhotoLoader get photoLoader => Provider.of<PhotoLoader>(context);
-  
+
   @override
   Widget build(BuildContext context) {
-    _logger.i("Build");
-    return ChangeNotifierBuilder(
-      value: photoLoader,
-      builder: (_, __) {
-        return GridView.builder(
-          itemBuilder: _buildItem,
-          itemCount: photoLoader.getPhotos().length,
-          gridDelegate:
-              SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 4),
-        );
-      },
-    );
-  }
-
-  Widget _buildItem(BuildContext context, int index) {
-    var file = File(photoLoader.getPhotos()[index].localPath);
+    _logger.i("Build with _crossAxisCount: " + _crossAxisCount.toString());
     return GestureDetector(
-      onTap: () async {
-        routeToDetailPage(file, context);
+      onScaleUpdate: (ScaleUpdateDetails details) {
+        _logger.i("Scale update: " + details.horizontalScale.toString());
+        setState(() {
+          if (details.horizontalScale < 1) {
+            _crossAxisCount = 8;
+          } else if (details.horizontalScale < 2) {
+            _crossAxisCount = 5;
+          } else if (details.horizontalScale < 4) {
+            _crossAxisCount = 4;
+          } else if (details.horizontalScale < 8) {
+            _crossAxisCount = 2;
+          } else {
+            _crossAxisCount = 1;
+          }
+        });
       },
-      child: Hero(
-        child: Padding(
-          padding: const EdgeInsets.all(1.0),
-          child: ImageWidget(path: file.path),
-        ),
-        tag: 'photo_' + file.path,
+      child: ChangeNotifierBuilder(
+        value: photoLoader,
+        builder: (_, __) {
+          return GridView.builder(
+              itemBuilder: _buildItem,
+              itemCount: photoLoader.getPhotos().length,
+              gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
+                crossAxisCount: _crossAxisCount,
+              ));
+        },
       ),
     );
   }
 
-  void routeToDetailPage(File file, BuildContext context) async {
+  Widget _buildItem(BuildContext context, int index) {
+    var photo = photoLoader.getPhotos()[index];
+    return GestureDetector(
+      onTap: () async {
+        routeToDetailPage(photo.localPath, context);
+      },
+      onLongPress: () {
+        Toast.show(photo.thumbnailPath, context);
+      },
+      child: Hero(
+        child: Padding(
+          padding: const EdgeInsets.all(1.0),
+          child: ImageWidget(path: photo.thumbnailPath),
+        ),
+        tag: 'photo_' + photo.localPath,
+      ),
+    );
+  }
+
+  void routeToDetailPage(String path, BuildContext context) async {
     final page = DetailPage(
-      file: file,
+      file: File(path),
     );
     Navigator.of(context).push(
       MaterialPageRoute(

lib/ui/image_widget.dart

@@ -31,7 +31,6 @@ class _ImageWidgetState extends State<ImageWidget> {
     Widget image;
 
     if (cachedImage != null) {
-      _logger.i("Cache hit for " + path);
       image = cachedImage;
     } else {
       image = FutureBuilder<Image>(

pubspec.lock

@@ -94,7 +94,7 @@ packages:
     source: hosted
     version: "3.1.3"
   image:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: image
       url: "https://pub.dartlang.org"
@@ -315,6 +315,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.2.11"
+  toast:
+    dependency: "direct main"
+    description:
+      name: toast
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.5"
   typed_data:
     dependency: transitive
     description:

pubspec.yaml

@@ -32,6 +32,8 @@ dependencies:
   dio: ^3.0.9
   local_image_provider: ^1.0.0
   crypto: ^2.1.3
+  toast: ^0.1.5
+  image: ^2.1.4
 
 dev_dependencies:
   flutter_test: