✨ Post content local cache

lib/controllers/post_editor_controller.dart

@@ -1,12 +1,19 @@
+import 'dart:async';
+import 'dart:convert';
+
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
+import 'package:get/get_rx/get_rx.dart';
 import 'package:solian/models/post.dart';
 import 'package:solian/models/realm.dart';
 import 'package:solian/widgets/attachments/attachment_publish.dart';
 import 'package:solian/widgets/posts/editor/post_editor_overview.dart';
 import 'package:textfield_tags/textfield_tags.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 class PostEditorController extends GetxController {
+  late final SharedPreferences _prefs;
+
   final titleController = TextEditingController();
   final descriptionController = TextEditingController();
   final contentController = TextEditingController();
@@ -23,7 +30,28 @@ class PostEditorController extends GetxController {
 
   RxBool isDraft = false.obs;
 
+  RxBool isRestoreFromLocal = false.obs;
+  Rx<DateTime?> lastSaveTime = Rx(null);
+  Timer? _saveTimer;
+
   PostEditorController() {
+    SharedPreferences.getInstance().then((inst) {
+      _prefs = inst;
+      localRead();
+      _saveTimer = Timer.periodic(
+        const Duration(seconds: 3),
+        (Timer t) {
+          if (isNotEmpty) {
+            localSave();
+            lastSaveTime.value = DateTime.now();
+            lastSaveTime.refresh();
+          } else if (_prefs.containsKey('post_editor_local_save')) {
+            localClear();
+            lastSaveTime.value = null;
+          }
+        },
+      );
+    });
     contentController.addListener(() {
       contentLength.value = contentController.text.length;
     });
@@ -57,6 +85,46 @@ class PostEditorController extends GetxController {
     isDraft.value = !isDraft.value;
   }
 
+  void localSave() {
+    _prefs.setString(
+      'post_editor_local_save',
+      jsonEncode({
+        ...payload,
+        'reply_to': replyTo.value?.toJson(),
+        'repost_to': repostTo.value?.toJson(),
+        'edit_to': editTo.value?.toJson(),
+        'realm': realmZone.value?.toJson(),
+      }),
+    );
+  }
+
+  void localRead() {
+    if (_prefs.containsKey('post_editor_local_save')) {
+      isRestoreFromLocal.value = true;
+      payload = jsonDecode(_prefs.getString('post_editor_local_save')!);
+    }
+  }
+
+  void localClear() {
+    _prefs.remove('post_editor_local_save');
+  }
+
+  void currentClear() {
+    titleController.clear();
+    descriptionController.clear();
+    contentController.clear();
+    tagController.clearTags();
+    attachments.clear();
+    isDraft.value = false;
+    isRestoreFromLocal.value = false;
+    lastSaveTime.value = null;
+    contentLength.value = 0;
+    editTo.value = null;
+    replyTo.value = null;
+    repostTo.value = null;
+    realmZone.value = null;
+  }
+
   set editTarget(Post? value) {
     if (value == null) {
       editTo.value = null;
@@ -99,14 +167,46 @@ class PostEditorController extends GetxController {
     };
   }
 
+  set payload(Map<String, dynamic> value) {
+    titleController.text = value['title'] ?? '';
+    descriptionController.text = value['description'] ?? '';
+    contentController.text = value['content'] ?? '';
+    attachments.value = value['attachments'].cast<int>() ?? List.empty();
+    attachments.refresh();
+    isDraft.value = value['is_draft'];
+    if (value['reply_to'] != null) {
+      replyTo.value = Post.fromJson(value['reply_to']);
+    }
+    if (value['repost_to'] != null) {
+      repostTo.value = Post.fromJson(value['repost_to']);
+    }
+    if (value['edit_to'] != null) {
+      editTo.value = Post.fromJson(value['edit_to']);
+    }
+    if (value['realm'] != null) {
+      realmZone.value = Realm.fromJson(value['realm']);
+    }
+  }
+
   bool get isEmpty {
     if (contentController.text.isEmpty) return true;
-
     return false;
   }
 
+  bool get isNotEmpty {
+    return [
+      titleController.text.isNotEmpty,
+      descriptionController.text.isNotEmpty,
+      contentController.text.isNotEmpty,
+      attachments.isNotEmpty,
+      tagController.getTags?.isNotEmpty ?? false,
+    ].any((x) => x);
+  }
+
   @override
   void dispose() {
+    _saveTimer?.cancel();
+
     contentController.dispose();
     tagController.dispose();
     super.dispose();