Learn TypeScript 3 by Building Web Applications

Implementing the getMediaCollectionIdentifiersList method

This method will simply return an array containing all the keys in the store. This will come in handy later when we work on the UI, in order to allow us to load the existing collections.

The following is the relevant code:

getMediaCollectionIdentifiersList(): Promise<string[]> { 
    return new Promise<string[]>((resolve, reject) => { 
        console.log("Retrieving the list of media collection         identifiers"); 
        this._store.keys().then(keys => { 
            console.log(`Retrieved the of media collection             identifiers:             ${keys}`); 
            resolve(keys); 
        }) 
        .catch(err => { 
            console.error(`Failed to retrieve the list of media             collection identifiers. Error: ${err}`); 
            reject(err); 
        }) 
    }); 
} 

This is, of course, very similar ...