balena-settings-storage

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Balena settings storage utilities.

Role

The intention of this module is to provide low level access to how balena persists settings in both the filesystem and the browser.

THIS MODULE IS LOW LEVEL AND IS NOT MEANT TO BE USED BY END USERS DIRECTLY.

Unless you know what you're doing, use the balena SDK instead.

Installation

Install balena-settings-storage by running:

$ npm install --save balena-settings-storage

Documentation

• storage
  • .getStorage(options) ⇒ storage
    • ~set(name, value) ⇒ Promise
    • ~get(name) ⇒ [ 'Promise' ].<*>
    • ~has(name) ⇒ [ 'Promise' ].<Boolean>
    • ~remove(name) ⇒ Promise
    • ~clear() ⇒ Promise

storage.getStorage(options) ⇒ storage

Kind: static method of storage
Summary: Get an instance of storage module
Access: public

| Param | Type | Description | | --- | --- | --- | | options | Object | options | | [options.dataDirectory] | String | False | the directory to use for storage in Node.js or false to create an isolated in memory instance. Values other than false are ignored in the browser. |

Example

// with es6 imports
import { getStorage } from 'balena-settings-storage';
// or with node require
const { getStorage } = require('balena-settings-storage');

const storage = getStorage({
	dataDirectory: '/opt/cache/balena'
});

• .getStorage(options) ⇒ storage
  • ~set(name, value) ⇒ Promise
  • ~get(name) ⇒ [ 'Promise' ].<*>
  • ~has(name) ⇒ [ 'Promise' ].<Boolean>
  • ~remove(name) ⇒ Promise
  • ~clear() ⇒ Promise

getStorage~set(name, value) ⇒ Promise

Kind: inner method of getStorage
Summary: Set a value
Access: public

| Param | Type | Description | | --- | --- | --- | | name | String | name | | value | * | value |

Example

storage.set('token', '1234')

getStorage~get(name) ⇒ [ 'Promise' ].<*>

Kind: inner method of getStorage
Summary: Get a value
Returns: [ 'Promise' ].<*> - value or undefined
Access: public

| Param | Type | Description | | --- | --- | --- | | name | String | name |

Example

storage.get('token').then((token) => {
	console.log(token)
});

getStorage~has(name) ⇒ [ 'Promise' ].<Boolean>

Kind: inner method of getStorage
Summary: Check if the value exists
Returns: [ 'Promise' ].<Boolean> - has value
Access: public

| Param | Type | Description | | --- | --- | --- | | name | String | name |

Example

storage.has('token').then((hasToken) => {
	if (hasToken) {
		console.log('Yes')
	} else {
		console.log('No')
});

getStorage~remove(name) ⇒ Promise

Kind: inner method of getStorage
Summary: Remove a value
Access: public

| Param | Type | Description | | --- | --- | --- | | name | String | name |

Example

storage.remove('token')

getStorage~clear() ⇒ Promise

Kind: inner method of getStorage
Summary: Remove all values
Access: public
Example

storage.clear()

Support

If you're having any problem, please raise an issue on GitHub and the balena team will be happy to help.

Tests

Run the test suite by doing:

$ npm test

Contribute

• Issue Tracker: github.com/balena-io-modules/balena-settings-storage/issues
• Source Code: github.com/balena-io-modules/balena-settings-storage

Before submitting a PR, please make sure that you include tests, and that coffeelint runs without any warning:

$ npm run lint

License

The project is licensed under the Apache 2.0 license.