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It allows you to store and retrieve data from a JSON file. It support manipulating nested keys with dot separated.

json_bridge.dart #

GitHub Repo stars pub package GitHub last commit JSONBridge workflow

A powerful, flexible and easy to use JSON file manager for Dart and flutter app.


Compatibility #

Sdk & Flutter version supported:

✅   SDK: >=2.14.0 <3.0.0
✅   Flutter: >=2.10.0

Platform supported:

Support Android iOS Linux macOS Windows
JSONBridge ✔️ ✔️ ✔️ ✔️ ✔️

Why should you give a try ? #

👉 It allows you to store and retrieve data from a JSON file.

👉 The JSON file is stored in the application document directory or a dir you provide.

👉 JSONBridge support manipulating nested keys with dot separated.

👉 Use JSONBridge to store user preferences, settings, data, etc.

👉 Use JSONBridge to build the next big and powerfull noSQL database for dart and flutter apps.

👉 Use JSONBridge to store any data in a JSON file within your application.

👉 Use JSONBridge to check if user is using your app for the first time.

👉 Use JSONBridge to track user activity and show him the last seen screen when he restart the app.

Usecases are endless, use your imagination.


Getting Started #

1. Add the dependency #

dependencies:
  # Please replace [latest_version] with the latest version.
  json_bridge: ^latest_version

2. Import the package #

import 'package:json_bridge/json_bridge.dart';

3. Initialize the package #


    // Omit dir to use your flutter application document directory
  JSONBridge jsonBridge = JSONBridge()..init(fileName: 'config', dir: 'test');

4. Use the package #

4.1. Write a map into the json file

Note that using the write method will overwrite the entire file.

If you want to add a key/value pair or new json object, consider using the set method

  jsonBridge.write({
    'name': 'John Doe',
    'age': 25,
    'address': {
      'street': 'Main Street',
      'city': 'New York',
      'country': 'USA'
    }
  });

The result will be:

{
  "name": "John Doe",
  "age": 25,
  "address": {
    "street": "Main Street",
    "city": "New York",
    "country": "USA"
  }
}

4.2. Clear all content of the json file and delete it

  jsonBridge.clear();

4.3. Read the entire content of the json file

  Map<String, dynamic> dataFromJsonBridge = jsonBridge.read();

Your dataFromJsonBridge variable will contain the entire content of the json file as a Map<String, dynamic> and should look like in map form:

{
  "name": "John Doe",
  "age": 25,
  "address": {
    "street": "Main Street",
    "city": "New York",
    "country": "USA"
  }
}

4.4. Add new JSON object

jsonBridge.set('preferences', {
    'dark': true,
    'receive_notification': false,
    'show_update_notification': true,
});

Your json file should now contain:

{
  "name": "John Doe",
  "age": 25,
  "address": {
    "street": "Main Street",
    "city": "New York",
    "country": "USA"
  },
  "preferences": {
    "dark": true,
    "receive_notification": false,
    "show_update_notification": true
  }
}

4.5. Update a nested key/value pair

Let's say, we want to update the dark mode preference to false

jsonBridge.set('preferences.dark', false);

Your json file should now contain:

{
  "name": "John Doe",
  "age": 25,
  "address": {
    "street": "Main Street",
    "city": "New York",
    "country": "USA"
  },
  "preferences": {
    "dark": false,
    "receive_notification": false,
    "show_update_notification": true
  }
}

4.6. Get a value

Everywhere you need to provide a key, you can use a dot separated string to access nested keys. If your key is not found, the method will return null.

If your key contains invalid character, an error will be thrown.

String name = jsonBridge.get('name');
// name = 'John Doe'

int age = jsonBridge.get('age');
// age = 25

String street = jsonBridge.get('address.street');
// street = 'Main Street'

String city = jsonBridge.get('address.city');
// city = 'New York'

String country = jsonBridge.get('address.country');
// country = 'USA'

bool dark = jsonBridge.get('preferences.dark');
// dark = false

bool receiveNotification = jsonBridge.get('preferences.receive_notification');
// receiveNotification = false

bool showUpdateNotification = jsonBridge.get('preferences.show_update_notification');
// showUpdateNotification = true

4.7. Delete a key

jsonBridge.delete('preferences.show_update_notification');

Your json file should now contain:

{
  "name": "John Doe",
  "age": 25,
  "address": {
    "street": "Main Street",
    "city": "New York",
    "country": "USA"
  },
  "preferences": {
    "dark": false,
    "receive_notification": false
  }
}

4.8. Check if a key exists

bool exists = jsonBridge.exists('preferences.dark');
// exists = true

bool exists = jsonBridge.exists('iKnowThisKeyDoesNotExist');
// exists = false

API #

Below, the full list of methods available in JSONBridge.

Once again, everywhere you see a key, you can use dot separated keys to access nested keys.

Method Name Description
void init({required String fileName, String? dir}) Init the bridge by creating the json file. Should be call before any other method
Map<String, dynamic> read() Reads the JSON file and returns a Map.
void write(Map<String, dynamic> data) Write a map into the json file. It override all previous content
void clear() Delete completly the json file
void set(String key, dynamic value) Add or update a key
void delete(String key) Delete a key from the json file
dynamic get(String key) Get a value from the json file
bool has(String key) Check if a key exists in the JSON file.

Support #

Please email to dah.kenangnon (at) gmail (dot) com if you have any questions or comments or business support.

Contributing #

Contributions are welcome and are greatly appreciated! Every little bit helps, and credit will always be given. Please see the contribution guidelines and code of conduct for more details.

Fire up now and enjoy! 🚀

This project is licensed under the BSD-3-Clause License - see the LICENSE file for details.

Maintained by Justin Dah-kenangnon with ❤️

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It allows you to store and retrieve data from a JSON file. It support manipulating nested keys with dot separated.

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API reference

License

BSD-3-Clause (LICENSE)

Dependencies

flutter, path_provider

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