|
| 1 | +# Default Client |
| 2 | + |
| 3 | +**Because we love the realtime side of feathers js, by default socketio's methods are available on FlutterFeathersjs.{methodName}** |
| 4 | + |
| 5 | +You get exactly what feathers server send (_Serialization and Deserialization are not supported._) except in the listen method. |
| 6 | + |
| 7 | +This client don't support file upload |
| 8 | + |
| 9 | +Recommended: Use rest client to upload file |
| 10 | + |
| 11 | +## find |
| 12 | + |
| 13 | +Retrieves a list of all matching resources from the service |
| 14 | + |
| 15 | +All message |
| 16 | + |
| 17 | +```dart |
| 18 | + try { |
| 19 | + var messageResponse = await flutterFeathersjs.find(serviceName: "message", |
| 20 | + query: {}); |
| 21 | +
|
| 22 | + // print(messageResponse); => feathers's find data format |
| 23 | + } on FeatherJsError catch (e) { |
| 24 | +
|
| 25 | + // When error is FeatherJsErrorType |
| 26 | + // if(e.type == FeatherJsErrorType.IS_SERVER_ERROR) |
| 27 | + // Check the error type as above and handle it |
| 28 | + } catch (er) { |
| 29 | + // Catch unknown error |
| 30 | +
|
| 31 | + } |
| 32 | +``` |
| 33 | + |
| 34 | +message matching certain query |
| 35 | + |
| 36 | +```dart |
| 37 | +
|
| 38 | + try { |
| 39 | + // Find message with query: here with {"_id": "5f7643f0462f4348970cd32e"} |
| 40 | + var messageResponse = await flutterFeathersjs.find(serviceName: "message", query: {"_id": "5f7643f0462f4348970cd32e"}); |
| 41 | +
|
| 42 | + // print(messageResponse); => feathers's find data format |
| 43 | + } on FeatherJsError catch (e) { |
| 44 | +
|
| 45 | + // When error is FeatherJsErrorType |
| 46 | + // if(e.type == FeatherJsErrorType.IS_SERVER_ERROR) |
| 47 | + // Check the error type as above and handle it |
| 48 | + } catch (er) { |
| 49 | + // Catch unknown error |
| 50 | +
|
| 51 | + } |
| 52 | +``` |
| 53 | + |
| 54 | +## get |
| 55 | + |
| 56 | +Retrieve a single resource from the service with an `_id` |
| 57 | + |
| 58 | +```dart |
| 59 | +
|
| 60 | +
|
| 61 | + try { |
| 62 | + // Get a single new with it _id |
| 63 | + var messageResponse = await flutterFeathersjs.get(serviceName: "message", objectId: "5f7643f0462f4348970cd32e"); |
| 64 | +
|
| 65 | + // print(messageResponse); => feathers's get data format |
| 66 | + } on FeatherJsError catch (e) { |
| 67 | +
|
| 68 | + // When error is FeatherJsErrorType |
| 69 | + // if(e.type == FeatherJsErrorType.IS_SERVER_ERROR) |
| 70 | + // Check the error type as above and handle it |
| 71 | + } catch (er) { |
| 72 | + // Catch unknown error |
| 73 | +
|
| 74 | + } |
| 75 | +``` |
| 76 | + |
| 77 | +## create |
| 78 | + |
| 79 | +Create a new resource with data. |
| 80 | + |
| 81 | +```dart |
| 82 | +
|
| 83 | +
|
| 84 | + try { |
| 85 | +
|
| 86 | + // Create a message on the server without file upload |
| 87 | + var messageResponse = await flutterFeathersjs.create( |
| 88 | + serviceName: "message", |
| 89 | + data: {"title": "Using FlutterFeathersjs is easy", "content": "Yes very easy" , "author" :"5f7h43f0462f4348970cd32e"}); |
| 90 | +
|
| 91 | + // print(messageResponse); => feathers's get data format |
| 92 | + } on FeatherJsError catch (e) { |
| 93 | +
|
| 94 | + // When error is FeatherJsErrorType |
| 95 | + // if(e.type == FeatherJsErrorType.IS_SERVER_ERROR) |
| 96 | + // Check the error type as above and handle it |
| 97 | + } catch (er) { |
| 98 | + // Catch unknown error |
| 99 | +
|
| 100 | + } |
| 101 | +``` |
| 102 | + |
| 103 | +## update |
| 104 | + |
| 105 | +Completely replace a single resource with the `_id = objectId` |
| 106 | + |
| 107 | +```dart |
| 108 | +
|
| 109 | + try { |
| 110 | +
|
| 111 | + var messageResponse = await flutterFeathersjs.update( |
| 112 | + objectId: "5f7h43f0462f4t48970cd32e", |
| 113 | + serviceName: "message", |
| 114 | + data: {"title": "Using FlutterFeathersjs is easy", "content": "Yes very easy" , "author" :"5f7h43f0462f4348970cd32e"}); |
| 115 | +
|
| 116 | + // print(messageResponse); => feathers's get data format |
| 117 | + } on FeatherJsError catch (e) { |
| 118 | +
|
| 119 | + // When error is FeatherJsErrorType |
| 120 | + // if(e.type == FeatherJsErrorType.IS_SERVER_ERROR) |
| 121 | + // Check the error type as above and handle it |
| 122 | + } catch (er) { |
| 123 | + // Catch unknown error |
| 124 | +
|
| 125 | + } |
| 126 | +``` |
| 127 | + |
| 128 | +## patch |
| 129 | + |
| 130 | +Completely replace a single resource with the `_id = objectId` |
| 131 | + |
| 132 | +```dart |
| 133 | + try { |
| 134 | +
|
| 135 | + var messageResponse = await flutterFeathersjs.patch( |
| 136 | + objectId: "5f7h43f0462f4t48970cd32e", |
| 137 | + serviceName: "message", |
| 138 | + data: {"title": "Using FlutterFeathersjs is easy", "content": "Yes very easy" , "author" :"5f7h43f0462f4348970cd32e"}); |
| 139 | + // print(messageResponse); => feathers's get data format |
| 140 | + } on FeatherJsError catch (e) { |
| 141 | +
|
| 142 | + // When error is FeatherJsErrorType |
| 143 | + // if(e.type == FeatherJsErrorType.IS_SERVER_ERROR) |
| 144 | + // Check the error type as above and handle it |
| 145 | + } catch (er) { |
| 146 | + // Catch unknown error |
| 147 | +
|
| 148 | + } |
| 149 | +``` |
| 150 | + |
| 151 | +## remove |
| 152 | + |
| 153 | +Remove a single resource with `_id = objectId`: |
| 154 | + |
| 155 | +```dart |
| 156 | +try { |
| 157 | + var messageResponse = await flutterFeathersjs.remove(serviceName: "message", objectId: "5f7643f0462f4348970cd32e"); |
| 158 | +
|
| 159 | + // print(messageResponse); => feathers's remove data format |
| 160 | + } on FeatherJsError catch (e) { |
| 161 | +
|
| 162 | + // When error is FeatherJsErrorType |
| 163 | + // if(e.type == FeatherJsErrorType.IS_SERVER_ERROR) |
| 164 | + // Check the error type as above and handle it |
| 165 | + } catch (er) { |
| 166 | + // Catch unknown error |
| 167 | +
|
| 168 | + } |
| 169 | +``` |
| 170 | + |
| 171 | +## listen :zzz: |
| 172 | + |
| 173 | +For realtime event listening, keep in mind these informations: |
| 174 | + |
| 175 | +0. `On updated | patched | created | removed` event are all supported; |
| 176 | +1. You need a [StreamSubscription](https://api.flutter.dev/flutter/dart-async/StreamSubscription-class.html) |
| 177 | +2. You need a state manangment plugin like [flutter_bloc](https://pub.dev/packages/flutter_bloc) |
| 178 | + |
| 179 | +Now assume that we want to listen to `On created` on `message` service in realtime |
| 180 | + |
| 181 | +Add an event in your `message_event.dart`: |
| 182 | + |
| 183 | +```dart |
| 184 | +
|
| 185 | +class FeatherCreatedMessageEvent extends MessageEvent { |
| 186 | + final Message message; |
| 187 | +
|
| 188 | + FeatherCreatedMessageEvent({@required this.message}); |
| 189 | +
|
| 190 | + @override |
| 191 | + List<Object> get props => [message]; |
| 192 | +} |
| 193 | +
|
| 194 | +``` |
| 195 | + |
| 196 | +Add a state in your `message_state.dart`: |
| 197 | + |
| 198 | +```dart |
| 199 | +class FeatherCreatedMessageState extends MessageState { |
| 200 | + final String message; |
| 201 | +
|
| 202 | + FeatherCreatedMessageState({@required this.message}); |
| 203 | +
|
| 204 | + @override |
| 205 | + List<Object> get props => [message]; |
| 206 | +} |
| 207 | +
|
| 208 | +``` |
| 209 | + |
| 210 | +Now listen the event and broadcast it to your widget in your `message_bloc.dart`: |
| 211 | + |
| 212 | +```dart |
| 213 | +
|
| 214 | +import 'dart:async'; |
| 215 | +import 'package:flutter_feathersjs/src/helper.dart'; |
| 216 | +
|
| 217 | +// Other required import |
| 218 | +
|
| 219 | +part 'message_event.dart'; |
| 220 | +part 'message_state.dart'; |
| 221 | +
|
| 222 | +class MessageBloc extends Bloc<MessageEvent, MessageState> { |
| 223 | +
|
| 224 | + // FlutterFeathersjs |
| 225 | + final FlutterFeathersjs flutterFeathersjs; |
| 226 | +
|
| 227 | + // StreamSubscription |
| 228 | + StreamSubscription streamSubscription; |
| 229 | +
|
| 230 | +
|
| 231 | + // MessageBloc constructor |
| 232 | + MessageBloc( |
| 233 | + {this.flutterFeathersjs}) |
| 234 | + : super(MessageInitial()) { |
| 235 | +
|
| 236 | + // Listen to realtime event |
| 237 | + streamSubscription = flutterFeathersjs |
| 238 | + .listen<Message>( |
| 239 | + serviceName: "message", |
| 240 | + fromJson: Message.fromMap) |
| 241 | + .listen( |
| 242 | +
|
| 243 | + // onData: |
| 244 | + (event) { |
| 245 | +
|
| 246 | + // event is FeathersJsEventData<Message> |
| 247 | + // What event is sent by feathers js ? |
| 248 | + if(event.type == FeathersJsEventType.created){ |
| 249 | + // Trigger flutter_bloc event |
| 250 | + add(FeatherCreatedMessageEvent(message: event)); |
| 251 | +
|
| 252 | + }else if(event.type == FeathersJsEventType.removed){ |
| 253 | + // |
| 254 | + } else if (event.type == FeathersJsEventType.patched){ |
| 255 | + // ... |
| 256 | + } |
| 257 | + |
| 258 | + }, |
| 259 | +
|
| 260 | +
|
| 261 | + // onError: |
| 262 | + (e) { |
| 263 | + // e is a FeatherJsError |
| 264 | + // You can check what error occured: e.type |
| 265 | + |
| 266 | + // Add the event to flutter_bloc |
| 267 | + add(MessageError(message: e.error)); |
| 268 | + }, |
| 269 | +
|
| 270 | + ); |
| 271 | + } |
| 272 | +
|
| 273 | + @override |
| 274 | + Stream<MessageState> mapEventToState( |
| 275 | + MessageEvent event, |
| 276 | + ) async* { |
| 277 | + try { |
| 278 | +
|
| 279 | + // Listen to flutter_bloc event which correspond to our case for realtime |
| 280 | + if (event is FeatherCreatedMessageEvent) { |
| 281 | + |
| 282 | + // Change the state to allow ui update |
| 283 | + yield FeatherCreatedMessageState(message: event.message); |
| 284 | + } |
| 285 | + } catch (e) { |
| 286 | + //yield MessageError(message: "Error"); |
| 287 | + } |
| 288 | + } |
| 289 | +
|
| 290 | + //This method should be called when a [Bloc] is no longer needed. |
| 291 | + // Just add it, nothing to customize except the streamSubscription var name |
| 292 | + @override |
| 293 | + Future<void> close() { |
| 294 | + streamSubscription.cancel(); |
| 295 | + return super.close(); |
| 296 | + } |
| 297 | +} |
| 298 | +
|
| 299 | +``` |
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