Yogu/site-manager

var EventEmitter = require('events').EventEmitter;
var SiteManager = require('./siteManager.js');

function Controller(dir) {
    EventEmitter.call(this);
    this.dir = dir;
    this.manager = new SiteManager(dir);
    this._initialLoad = this.manager.loadTask();
    this.manager.schedule(this._initialLoad);
    
    this.manager.on('siteAdded', function(newSite) {
        this._initTaskContextHandlers(newSite);
        this._initSiteHandlers(newSite);
    }.bind(this));
    
    this.manager.on('load', function() {
        this._siteMap = {};
        this.manager.sites.forEach(function(site) { this._siteMap[site.name] = site; }.bind(this));
        this.emit('manager:load', this.manager.sites);
    }.bind(this));
    
    this._initTaskContextHandlers(this.manager);
}

Controller.prototype = Object.create(EventEmitter.prototype);

Controller.prototype.getSites = function() {
    return this._initialLoad.catch(function(){}).then(function() {
        return this.manager.sites;
    }.bind(this));
};

Controller.prototype.getSite = function(siteName) {
    return this.getSites().then(function() {
        if (siteName in this._siteMap)
            return this._siteMap[siteName];
        throw new Error("There is no such site");
    }.bind(this));
};

Controller.prototype._initSiteHandlers = function(site) {
    site.on('load', function() {
        this.emit('site:load', site);
    }.bind(this));
    
    site.on('backup', function() {
        this.emit('site:backups', site);
    }.bind(this));
    
    site.on('restore', function() {
        this.emit('site:backups', site);
    }.bind(this));
};

Controller.prototype._initTaskContextHandlers = function(taskContext) {
    taskContext.on('schedule', function(task) {
        this.emit('task:schedule', task);
        
        task.on('log', function(message) {
            this.emit('task:log', task, message);
        }.bind(this));

        task.on('status', function() {
            this.emit('task:status', task);
        }.bind(this));
    }.bind(this));
};

Controller.prototype.reload = function() {
    this.manager.schedule(this.manager.loadTask());
};

module.exports = Controller;