Implemented project export

lib/pages/projects.dart

@@ -1,3 +1,7 @@
+import 'dart:io';
+
+import 'package:archive/archive_io.dart';
+import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 import 'package:logic_circuits_simulator/dialogs/new_project.dart';
@@ -5,7 +9,10 @@ import 'package:logic_circuits_simulator/models/projects.dart';
 import 'package:logic_circuits_simulator/pages/project.dart';
 import 'package:logic_circuits_simulator/state/project.dart';
 import 'package:logic_circuits_simulator/state/projects.dart';
+import 'package:path/path.dart' as path;
+import 'package:path_provider/path_provider.dart';
 import 'package:provider/provider.dart';
+import 'package:share_plus/share_plus.dart';
 
 class ProjectsPage extends StatelessWidget {
   const ProjectsPage({Key? key}) : super(key: key);
@@ -58,6 +65,61 @@ class ProjectsPage extends StatelessWidget {
     Navigator.of(context).pushNamed(ProjectPage.routeName);
   }
 
+  bool get canExport => Platform.isWindows || Platform.isMacOS || Platform.isLinux;
+  void onProjectExport(BuildContext context, ProjectEntry p) async {
+    final projectsState = Provider.of<ProjectsState>(context, listen: false);
+    final msg = ScaffoldMessenger.of(context);
+
+    final outputFile = await FilePicker.platform.saveFile(
+      dialogTitle: 'Export ${p.projectName}',
+      fileName: '${p.projectId}.lcsproj',
+      allowedExtensions: ['lcsproj'],
+      lockParentWindow: true,
+      type: FileType.custom,
+    );
+
+    if (outputFile == null) {
+      return;
+    }
+
+    final enc = ZipEncoder();
+    await projectsState.archiveProject(
+      p, 
+      (archive) async {
+        enc.encode(archive, output: OutputFileStream(outputFile));
+      },
+    );
+
+    msg.showSnackBar(
+      SnackBar(
+        content: Text('Project ${p.projectName} exported'),
+      ),
+    );
+  }
+
+  bool get canShare => !(Platform.isWindows || Platform.isLinux);
+  void onProjectShare(BuildContext context, ProjectEntry p) async {
+    final projectsState = Provider.of<ProjectsState>(context, listen: false);
+
+    final tmpDir = await getTemporaryDirectory();
+    final archiveFile = File(path.join(tmpDir.path, '${p.projectId}.lcsproj'));
+
+    final enc = ZipEncoder();
+    await projectsState.archiveProject(
+      p, 
+      (archive) async {
+        enc.encode(archive, output: OutputFileStream(archiveFile.path));
+      },
+    );
+
+    await Share.shareFiles(
+      [archiveFile.path],
+      mimeTypes: ['application/zip'],
+    );
+
+    await archiveFile.delete();
+  }
+
   @override
   Widget build(BuildContext context) {
     final projects = Provider.of<ProjectsState>(context).projects;
@@ -77,10 +139,8 @@ class ProjectsPage extends StatelessWidget {
                       child: ProjectTile(
                         p,
                         onProjectDelete: () => onProjectDelete(context, p),
-                        onProjectExport: () {
+                        onProjectExport: canExport ? () => onProjectExport(context, p) : null,
-                          // TODO: Implement project export
+                        onProjectShare: canShare ? () => onProjectShare(context, p) : null,
-                          ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('Export coming soon...')));
-                        },
                         onProjectSelect: () => onProjectSelect(context, p),
                       ),
                     )).toList(growable: false),
@@ -126,10 +186,11 @@ class ProjectTile extends StatelessWidget {
   final ProjectEntry project; 
   final void Function() onProjectSelect;
   final void Function() onProjectDelete;
-  final void Function() onProjectExport;
+  final void Function()? onProjectExport;
+  final void Function()? onProjectShare;
 
   const ProjectTile(this.project,
-      {Key? key, required this.onProjectSelect, required this.onProjectDelete, required this.onProjectExport})
+      {Key? key, required this.onProjectSelect, required this.onProjectDelete, required this.onProjectExport, required this.onProjectShare})
       : super(key: key);
 
   @override
@@ -158,7 +219,10 @@ class ProjectTile extends StatelessWidget {
                   ),
                 ),
                 Padding(
-                  padding: const EdgeInsets.all(2.0),
+                  padding: const EdgeInsets.symmetric(
+                    vertical: 2.0,
+                    horizontal: 8.0,
+                  ),
                   child: Text(
                     DateFormat.yMMMd().add_jms().format(project.lastUpdate.toLocal()),
                     style: Theme.of(context).textTheme.caption,
@@ -173,10 +237,14 @@ class ProjectTile extends StatelessWidget {
               child: PopupMenuButton<String>(
                 icon: const Icon(Icons.more_horiz),
                 itemBuilder: (context) => [
-                  const PopupMenuItem(
+                  if (onProjectExport != null) const PopupMenuItem(
                     value: 'export',
                     child: Text('Export'),
                   ),
+                  if (onProjectShare != null) const PopupMenuItem(
+                    value: 'share',
+                    child: Text('Share'),
+                  ),
                   const PopupMenuItem(
                     value: 'delete',
                     child: Text('Delete'),
@@ -188,7 +256,10 @@ class ProjectTile extends StatelessWidget {
                       onProjectDelete();
                       break;
                     case 'export':
-                      onProjectExport();
+                      onProjectExport?.call();
+                      break;
+                    case 'share':
+                      onProjectShare?.call();
                       break;
                     default:
                       throw Exception('Unexpected option: $selectedOption');

lib/state/projects.dart

@@ -1,6 +1,7 @@
 import 'dart:convert';
 import 'dart:io';
 
+import 'package:archive/archive_io.dart';
 import 'package:flutter/foundation.dart';
 import 'package:logic_circuits_simulator/models/projects.dart';
 import 'package:path_provider/path_provider.dart';
@@ -77,4 +78,51 @@ class ProjectsState extends ChangeNotifier {
       )
     );
   }
+
+  Future<T> archiveProject<T>(ProjectEntry project, Future<T> Function(Archive archive) callback) async {
+    final projectsDir = await _getProjectsDir();
+
+    // Create dir where export is prepared
+    final exportDir = Directory(path.join(projectsDir.path, '.export'));
+    await exportDir.create();
+
+    // Write index.json with only that project
+    final exportIndex = index.copyWith(
+      projects: index.projects.where((p) => p.projectId == project.projectId).toList(growable: false),
+    );
+    final exportIndexFile = File(path.join(exportDir.path, 'index.json'));
+    await exportIndexFile.writeAsString(jsonEncode(exportIndex));
+
+    final exportProjectIdFile = File(path.join(exportDir.path, 'projectId.txt'));
+    await exportProjectIdFile.writeAsString(project.projectId);
+
+    // Copy project folder
+    final projectDir = Directory(path.join(projectsDir.path, project.projectId));
+    final exportProjectDir = Directory(path.join(exportDir.path, project.projectId));
+    await exportProjectDir.create();
+    await for (final entry in projectDir.list(recursive: true, followLinks: false)) {
+      final filename = path.relative(entry.path, from: projectDir.path);
+      if (entry is Directory) {
+        final newDir = Directory(path.join(exportProjectDir.path, filename));
+        await newDir.create(recursive: true);
+      }
+      else if (entry is File) {
+        await entry.copy(path.join(exportProjectDir.path, filename));
+      }
+      else if (entry is Link) {
+        final newLink = Link(path.join(exportProjectDir.path, filename));
+        await newLink.create(await entry.target());
+      }
+    }
+    
+    // Create archive
+    final archive = createArchiveFromDirectory(exportDir, includeDirName: false);
+
+    final result = await callback(archive);
+
+    // Remove preparation dir
+    await exportDir.delete(recursive: true);
+
+    return result;
+  }
 }

linux/flutter/generated_plugin_registrant.cc

@@ -6,6 +6,10 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <url_launcher_linux/url_launcher_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
+  g_autoptr(FlPluginRegistrar) url_launcher_linux_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "UrlLauncherPlugin");
+  url_launcher_plugin_register_with_registrar(url_launcher_linux_registrar);
 }

linux/flutter/generated_plugins.cmake

@@ -3,6 +3,7 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  url_launcher_linux
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST

pubspec.lock

@@ -15,6 +15,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "4.0.0"
+  archive:
+    dependency: "direct main"
+    description:
+      name: archive
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.3.0"
   args:
     dependency: transitive
     description:
@@ -183,6 +190,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.1.2"
+  file_picker:
+    dependency: "direct main"
+    description:
+      name: file_picker
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.6.1"
   fixnum:
     dependency: transitive
     description:
@@ -209,6 +223,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.0"
+  flutter_plugin_android_lifecycle:
+    dependency: transitive
+    description:
+      name: flutter_plugin_android_lifecycle
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.6"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -464,6 +485,48 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.2.0"
+  share_plus:
+    dependency: "direct main"
+    description:
+      name: share_plus
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.0.8"
+  share_plus_linux:
+    dependency: transitive
+    description:
+      name: share_plus_linux
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.0"
+  share_plus_macos:
+    dependency: transitive
+    description:
+      name: share_plus_macos
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
+  share_plus_platform_interface:
+    dependency: transitive
+    description:
+      name: share_plus_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.3"
+  share_plus_web:
+    dependency: transitive
+    description:
+      name: share_plus_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
+  share_plus_windows:
+    dependency: transitive
+    description:
+      name: share_plus_windows
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
   shared_preferences:
     dependency: "direct main"
     description:
@@ -616,6 +679,62 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.3.0"
+  url_launcher:
+    dependency: transitive
+    description:
+      name: url_launcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.1.3"
+  url_launcher_android:
+    dependency: transitive
+    description:
+      name: url_launcher_android
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.0.17"
+  url_launcher_ios:
+    dependency: transitive
+    description:
+      name: url_launcher_ios
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.0.17"
+  url_launcher_linux:
+    dependency: transitive
+    description:
+      name: url_launcher_linux
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
+  url_launcher_macos:
+    dependency: transitive
+    description:
+      name: url_launcher_macos
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
+  url_launcher_platform_interface:
+    dependency: transitive
+    description:
+      name: url_launcher_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  url_launcher_web:
+    dependency: transitive
+    description:
+      name: url_launcher_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.12"
+  url_launcher_windows:
+    dependency: transitive
+    description:
+      name: url_launcher_windows
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
   uuid:
     dependency: "direct main"
     description:
@@ -667,4 +786,4 @@ packages:
     version: "3.1.0"
 sdks:
   dart: ">=2.17.0-266.1.beta <3.0.0"
-  flutter: ">=2.8.1"
+  flutter: ">=2.10.0"

pubspec.yaml

@@ -35,6 +35,9 @@ dependencies:
   flutter_hooks: ^0.18.3
   uuid: ^3.0.6
   collection: ^1.16.0
+  archive: ^3.3.0
+  file_picker: ^4.6.1
+  share_plus: ^4.0.8
 
 dev_dependencies:
   flutter_test:

windows/flutter/generated_plugin_registrant.cc

@@ -6,6 +6,9 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <url_launcher_windows/url_launcher_windows.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
+  UrlLauncherWindowsRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("UrlLauncherWindows"));
 }

windows/flutter/generated_plugins.cmake

@@ -3,6 +3,7 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  url_launcher_windows
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST