vue-configurations/ApplicationConfiguration.js

Plugin to inject application, company and user configurations into global Vue object.

const EventEmitter = require('events');

/**
 * The config.
 */
export class ApplicationConfiguration extends EventEmitter
{
    /**
     * Contructor.
     */
    constructor() 
    {
        super();
        this.configurations = {};
    }

    initialize(configurations)
    {
        for(let i in configurations)
        {
            _.set(this.configurations, i, configurations[i]);
        }
    }

    /**
     * Return current config object.
     */
    all() 
    {
        return this.configurations;
    }

    /**
     * Lookup for a config value by key.
     * key could be a dot notation string for descendant lookup.
     * @param {String} key
     * @param {any} def Default value
     */
    get(key, def = null) 
    {
        if(!this.has(key, this.configurations)) 
        {
            return def;
        }

        return key.split('.').reduce((v, k) => v && v[k], this.configurations);
    }

    set(key, value)
    {
        _.set(this.configurations, key, value);
        
        this.emit('set', key, value);
    }

    /**
     * Test if key is in obj.
     */
    has(key) 
    {
        try 
        {
            const found = this._lookUp(key, this.configurations);

            return (found !== undefined);
        } 
        catch(e) 
        {
            return false;
        }
    }

    /**
     * Performs a key lookup in obj.
     *
     * @param {string} key
     * @param {Object} obj
     */
    _lookUp(key, obj) 
    {
        return key.split('.').reduce((v, k) => v[k], obj);
    }
};

export default ApplicationConfiguration;