data_channel 1.0.1

data_channel: ^1.0.1 copied to clipboard

Introduction #

Data Channel for Dart and Flutter.

data_channel (DC) is a simple dart utility for exception handling and data routing. It is not a very ideal solution to handle exceptions using try and catch at every function call, use data_channel instead. data_channel will take care of routing errors and data out of a method.

Installation #

Go to https://pub.dev/packages/data_channel#-installing-tab- for the latest version of data_channel

Example #

Return error or data from getSomeLoginData method

import 'package:data_channel/data_channel.dart';

Future<DC<Exception, LoginModel>> getSomeLoginData() async {
    try {
      return DC.data(
        someData,
      );
    } on Exception {
      return DC.error(
        CacheException(),
      );
    }
 }

Check for errors

void doSomething() async {
    final value = await getSomeLoginData();

    if (value.hasError) {
      // do something
    } else if (value.hasData) {
      // do something
    }
 }

DC forward Avoid redundant error checks. Easily convert an incoming data model to another one and forward it to the callee. DC.forward will return the error in case it encounters with one else data will be returned.

Future<DC<Exception, UserModel>> checkSomethingAndReturn() {
    final loginData = await getSomeLoginData();

    return DC.forward(
      loginData,
      UserModel(id: loginData.data?.tokenId),
    );
  }

DC pick

  final appData = await getSomeLoginData();
  appData.pick(
    onError: (error) {
      if (error is CacheException) {
        alerts.setException(context, error);
      }
    },
    onData: (data) {
      value1 = data;
    },
    onNoData: () {
      value1 = getDefaultValue();
    },
  );

  // or

  appData.pick(
    onError: (error) {
      if (error is CacheException) {
        alerts.setException(context, error);
      }
    },
    onNoError: (data) {
      if (data != null) {
        value1 = data;

        return;
      }

      value1 = getDefaultValue();
    },
  );

Buy me a coffee #

Help me keep the app FREE and open for all. Paypal me: paypal.me/ganeshrvel

Contacts #

Please feel free to contact me at [email protected]

About #

• Author: Ganesh Rathinavel
• License: MIT
• Package URL: https://pub.dev/packages/scaff
• Repo URL: https://github.com/ganeshrvel/pub-scaff
• Contacts: [email protected]

License #

scaff | Scaffold Generator for Dart and Flutter. MIT License.

Copyright © 2018-Present Ganesh Rathinavel