Support saved snippets

assets/l10n/app_en.arb

@@ -393,6 +393,54 @@
   "@composeBoxAttachFromCameraTooltip": {
     "description": "Tooltip for compose box icon to attach an image from the camera to the message."
   },
+  "composeBoxShowSavedSnippetsTooltip": "Show saved snippets",
+  "@composeBoxShowSavedSnippetsTooltip": {
+    "description": "Tooltip for compose box icon to show a list of saved snippets."
+  },
+  "noSavedSnippets": "No saved snippets",
+  "@noSavedSnippets": {
+    "description": "Text to show on the saved snippets bottom sheet when there are no saved snippets."
+  },
+  "savedSnippetsTitle": "Saved snippets",
+  "@savedSnippetsTitle": {
+    "description": "Title for the bottom sheet to display saved snippets."
+  },
+  "newSavedSnippetButton": "New",
+  "@newSavedSnippetButton": {
+    "description": "Label for adding a new saved snippet."
+  },
+  "newSavedSnippetTitle": "New snippet",
+  "@newSavedSnippetTitle": {
+    "description": "Title for the bottom sheet to add a new saved snippet."
+  },
+  "newSavedSnippetTitleHint": "Title",
+  "@newSavedSnippetTitleHint": {
+    "description": "Hint text for the title input when adding a new saved snippet."
+  },
+  "newSavedSnippetContentHint": "Content",
+  "@newSavedSnippetContentHint": {
+    "description": "Hint text for the content input when adding a new saved snippet."
+  },
+  "errorFailedToCreateSavedSnippetTitle": "Failed to create saved snippet",
+  "@errorFailedToCreateSavedSnippetTitle": {
+    "description": "Error title when the saved snippet failed to be created."
+  },
+  "savedSnippetTitleValidationErrorEmpty": "Title cannot be empty.",
+  "@savedSnippetTitleValidationErrorEmpty": {
+    "description": "Validation error message when the title of the saved snippet is empty."
+  },
+  "savedSnippetTitleValidationErrorTooLong": "Title length shouldn't be greater than 60 characters.",
+  "@savedSnippetTitleValidationErrorTooLong": {
+    "description": "Validation error message when the title of the saved snippet is too long."
+  },
+  "savedSnippetContentValidationErrorEmpty": "Content cannot be empty.",
+  "@savedSnippetContentValidationErrorEmpty": {
+    "description": "Validation error message when the content of the saved snippet is empty."
+  },
+  "savedSnippetContentValidationErrorTooLong": "Content length shouldn't be greater than 10000 characters.",
+  "@savedSnippetContentValidationErrorTooLong": {
+    "description": "Validation error message when the content of the saved snippet is too long."
+  },
   "composeBoxGenericContentHint": "Type a message",
   "@composeBoxGenericContentHint": {
     "description": "Hint text for content input when sending a message."

lib/api/model/events.dart

@@ -37,6 +37,13 @@ sealed class Event {
           case 'update': return RealmUserUpdateEvent.fromJson(json);
           default: return UnexpectedEvent.fromJson(json);
         }
+      case 'saved_snippets':
+        switch (json['op'] as String) {
+          case 'add': return SavedSnippetsAddEvent.fromJson(json);
+          case 'update': return SavedSnippetsUpdateEvent.fromJson(json);
+          case 'remove': return SavedSnippetsRemoveEvent.fromJson(json);
+          default: return UnexpectedEvent.fromJson(json);
+        }
       case 'stream':
         switch (json['op'] as String) {
           case 'create': return ChannelCreateEvent.fromJson(json);
@@ -336,6 +343,68 @@ class RealmUserUpdateEvent extends RealmUserEvent {
   Map<String, dynamic> toJson() => _$RealmUserUpdateEventToJson(this);
 }
 
+/// A Zulip event of type `saved_snippets`: https://zulip.com/api/get-events#saved_snippets-add
+sealed class SavedSnippetsEvent extends Event {
+  @override
+  @JsonKey(includeToJson: true)
+  String get type => 'saved_snippets';
+
+  String get op;
+
+  SavedSnippetsEvent({required super.id});
+}
+
+/// A [SavedSnippetsEvent] with op `add`: https://zulip.com/api/get-events#saved_snippets-add
+@JsonSerializable(fieldRename: FieldRename.snake)
+class SavedSnippetsAddEvent extends SavedSnippetsEvent {
+  @override
+  String get op => 'add';
+
+  final SavedSnippet savedSnippet;
+
+  SavedSnippetsAddEvent({required super.id, required this.savedSnippet});
+
+  factory SavedSnippetsAddEvent.fromJson(Map<String, dynamic> json) =>
+    _$SavedSnippetsAddEventFromJson(json);
+
+  @override
+  Map<String, dynamic> toJson() => _$SavedSnippetsAddEventToJson(this);
+}
+
+/// A [SavedSnippetsEvent] with op `update`: https://zulip.com/api/get-events#saved_snippets-update
+@JsonSerializable(fieldRename: FieldRename.snake)
+class SavedSnippetsUpdateEvent extends SavedSnippetsEvent {
+  @override
+  String get op => 'update';
+
+  final SavedSnippet savedSnippet;
+
+  SavedSnippetsUpdateEvent({required super.id, required this.savedSnippet});
+
+  factory SavedSnippetsUpdateEvent.fromJson(Map<String, dynamic> json) =>
+    _$SavedSnippetsUpdateEventFromJson(json);
+
+  @override
+  Map<String, dynamic> toJson() => _$SavedSnippetsUpdateEventToJson(this);
+}
+
+/// A [SavedSnippetsEvent] with op `remove`: https://zulip.com/api/get-events#saved_snippets-remove
+@JsonSerializable(fieldRename: FieldRename.snake)
+class SavedSnippetsRemoveEvent extends SavedSnippetsEvent {
+  @override
+  String get op => 'remove';
+
+  final int savedSnippetId;
+
+  SavedSnippetsRemoveEvent({required super.id, required this.savedSnippetId});
+
+  factory SavedSnippetsRemoveEvent.fromJson(Map<String, dynamic> json) =>
+    _$SavedSnippetsRemoveEventFromJson(json);
+
+  @override
+  Map<String, dynamic> toJson() => _$SavedSnippetsRemoveEventToJson(this);
+}
+
 /// A Zulip event of type `stream`.
 ///
 /// The corresponding API docs are in several places for

lib/api/model/initial_snapshot.dart

@@ -48,6 +48,8 @@ class InitialSnapshot {
 
   final List<RecentDmConversation> recentPrivateConversations;
 
+  final List<SavedSnippet>? savedSnippets; // TODO(server-10)
+
   final List<Subscription> subscriptions;
 
   final UnreadMessagesSnapshot unreadMsgs;
@@ -132,6 +134,7 @@ class InitialSnapshot {
     required this.serverTypingStartedWaitPeriodMilliseconds,
     required this.realmEmoji,
     required this.recentPrivateConversations,
+    required this.savedSnippets,
     required this.subscriptions,
     required this.unreadMsgs,
     required this.streams,

lib/api/model/model.dart

@@ -311,6 +311,30 @@ enum UserRole{
   }
 }
 
+/// An item in `saved_snippets` from the initial snapshot.
+///
+/// For docs, search for "saved_snippets:"
+/// in <https://zulip.com/api/register-queue>.
+@JsonSerializable(fieldRename: FieldRename.snake)
+class SavedSnippet {
+  SavedSnippet({
+    required this.id,
+    required this.title,
+    required this.content,
+    required this.dateCreated,
+  });
+
+  final int id;
+  final String title;
+  final String content;
+  final int dateCreated;
+
+  factory SavedSnippet.fromJson(Map<String, Object?> json) =>
+    _$SavedSnippetFromJson(json);
+
+  Map<String, dynamic> toJson() => _$SavedSnippetToJson(this);
+}
+
 /// As in `streams` in the initial snapshot.
 ///
 /// Not called `Stream` because dart:async uses that name.

lib/api/route/saved_snippets.dart

@@ -0,0 +1,31 @@
+import 'package:json_annotation/json_annotation.dart';
+
+import '../core.dart';
+
+part 'saved_snippets.g.dart';
+
+/// https://zulip.com/api/create-saved-snippet
+Future<CreateSavedSnippetResult> createSavedSnippet(ApiConnection connection, {
+  required String title,
+  required String content,
+}) {
+  assert(connection.zulipFeatureLevel! >= 297); // TODO(server-10)
+  return connection.post('createSavedSnippet', CreateSavedSnippetResult.fromJson, 'saved_snippets', {
+    'title': RawParameter(title),
+    'content': RawParameter(content),
+  });
+}
+
+@JsonSerializable(fieldRename: FieldRename.snake)
+class CreateSavedSnippetResult {
+  final int savedSnippetId;
+
+  CreateSavedSnippetResult({
+    required this.savedSnippetId,
+  });
+
+  factory CreateSavedSnippetResult.fromJson(Map<String, dynamic> json) =>
+    _$CreateSavedSnippetResultFromJson(json);
+
+  Map<String, dynamic> toJson() => _$CreateSavedSnippetResultToJson(this);
+}