A datastore to easily and consistently store unique objects in an array.

You can also specify placeholders for displaying shimmers while awaiting data from an API call.

• Install
• Usage
• Example
• Tests
• Contributing

Install

npm install --save array-datastore

Usage

• constructor.instance(configObject) Create a new instance of the store with an optional configuration object.

• addUniqueObject() Add an unique object to the store. Objects are unique by their id field, so ensure your objects have that.

• addUniqueObjects() Add an array unique objects to the store.

• prependUniqueObject() Add an unique object to front of the store.

• prependUniqueObjects() Add an array unique objects to front of the store.

• setBeforeAddProcessor(callbackFunction) Set a function that will be called before any time an object is added to the store.

• hasObjectById() Check if the store has an object by its id.

• replaceObject() Replace an existing object or add to the store.

• deleteObjectById() Delete an object from the store by its id.

• reset() Delete all objects from the store.

• getObjects() Get all the objects in the store.

• getObjectIds() Get all the object ids in the store.

• getObjectById() Get an object from the store by its id.

• getObjectAtIndex() Get an object from the store at a specific index.

• getObjectByPredicate()Get the first object matching the provided filter predicate.

• getObjectIndexById() Get the index of an object by its id.

• hasPlaceholders() Checks if the store has placeholder objects.

• clearPlaceholders() Remove the placeholder objects from the store.

• sections Get the sections of the datastore. As you add values to the datastore, they are also added to a sectionedList. Note that this sectionedList can only be added to and no items will ever be removed from it; this may change in the future. See sectioned-list library for details.

See the tests (tests/dataStore_test.js) to see how these methods are used.

config object

When creating the store, you can specify an optional configuration object.

placeholders: number|Array<Object>

You can specify a number of placeholders or an array of placeholder objects that will populate the store until you add your first actual object or you call the #clearPlaceholders() method.

sectionSizes: Array

See sectioned-list library.

Example

Tests

We use mocha and chai. Run npm test

Contributing

Feel free to open a pull request!