index.js
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var _ = require("lodash");
/**
* @constructor
*/
var EasyExtender = function (plugins, hooks) {
this.plugins = {};
this.pluginOptions = {};
this.returnValues = {};
this.hooks = hooks;
this.defaultPlugins = plugins;
return this;
};
/**
* @returns {EasyExtender}
*/
EasyExtender.prototype.init = function () {
if (this.defaultPlugins) {
var required = Object.keys(this.defaultPlugins);
required.forEach(function (name) {
if (_.isUndefined(this.plugins[name])) {
this.plugins[name] = this.defaultPlugins[name];
}
}, this);
}
return this;
};
/**
* Call the '.plugin()' method of all registered plugins
*/
EasyExtender.prototype.initUserPlugins = function () {
var args = _.toArray(arguments);
var userPlugins = _.difference(Object.keys(this.plugins), Object.keys(this.defaultPlugins));
if (userPlugins.length) {
userPlugins.forEach(function (plugin) {
var pluginOptions = {};
if (this.pluginOptions) {
pluginOptions = this.pluginOptions[plugin];
}
this.returnValues[plugin].push({
value: this.get(plugin).apply(null, [pluginOptions].concat(args))
});
if (!_.isUndefined(pluginOptions) && !_.isUndefined(pluginOptions.enabled)) {
if (pluginOptions.enabled) {
this.enablePlugin(plugin);
} else {
this.disablePlugin(plugin);
}
} else {
this.enablePlugin(plugin);
}
}, this);
}
};
/**
* Wrap a module in East Extender pattern
* @param module
* @param localName
*/
EasyExtender.prototype.wrap = function (module, localName) {
this.registerPlugin({
"plugin:name": localName,
"plugin": function () {
return module;
}
});
};
/**
* @param {String} name
* @returns {Function|Boolean}
*/
EasyExtender.prototype.get = function (name) {
if (!_.isUndefined(this.plugins[name])) {
return this.plugins[name].plugin || false;
}
return false;
};
/**
* @param {Object} module
* @param {Object} [opts]
* @param {Function} [cb]
*/
EasyExtender.prototype.registerPlugin = function (module, opts, cb) {
var pluginOptions;
if (!_.isFunction(module.plugin)) {
return _.isFunction(cb) ? cb("Module must implement a .plugin() method") : false;
}
if (!cb && opts) {
if (_.isFunction(opts)) {
cb = opts;
} else {
pluginOptions = opts;
}
}
var name = _.isUndefined(module["plugin:name"]) ? _.uniqueId() : module["plugin:name"];
this.pluginOptions[name] = pluginOptions;
this.returnValues[name] = [];
this.plugins[name] = module;
if (_.isFunction(cb)) {
cb(null);
}
this.disablePlugin(name);
return this;
};
/**
*
* @param name
*/
EasyExtender.prototype.getPlugin = function (module) {
if (_.isString(module)) {
module = this.plugins[module];
}
if (!module) {
return false;
}
return module;
};
/**
*
* @param name
*/
EasyExtender.prototype.disablePlugin = function (module) {
module = this.getPlugin(module);
module._enabled = false;
return module;
};
/**
* @param name
*/
EasyExtender.prototype.enablePlugin = function (module) {
module = this.getPlugin(module);
module._enabled = true;
return module;
};
/**
* @param name
* @returns {*}
*/
EasyExtender.prototype.hook = function (name) {
// Get any extra args
var args = Array.prototype.slice.call(arguments, 1);
// build a list of hook funcs
var funcs = [];
_.each(this.plugins, function (plugin) {
if (plugin.hooks) {
if (!_.isUndefined(plugin.hooks[name])) {
funcs.push(plugin.hooks[name]);
}
}
});
return this.hooks[name].apply(this, [funcs].concat(args));
};
/**
* @param name
* @returns {*}
*/
EasyExtender.prototype.getReturnValues = function (name) {
return this.returnValues[name] || [];
};
module.exports = EasyExtender;