loopback-datasource-juggler/lib/hooks.js

64 lines
1.8 KiB
JavaScript

/**
* Module exports
*/
exports.Hookable = Hookable;
/**
* Hooks mixins for ./model.js
*/
var Hookable = require('./model.js');
/**
* List of hooks available
*/
Hookable.afterInitialize = null;
Hookable.beforeValidate = null;
Hookable.afterValidate = null;
Hookable.beforeSave = null;
Hookable.afterSave = null;
Hookable.beforeCreate = null;
Hookable.afterCreate = null;
Hookable.beforeUpdate = null;
Hookable.afterUpdate = null;
Hookable.beforeDestroy = null;
Hookable.afterDestroy = null;
// TODO: Evaluate https://github.com/bnoguchi/hooks-js/
Hookable.prototype.trigger = function trigger(actionName, work, data) {
var capitalizedName = capitalize(actionName);
var beforeHook = this.constructor["before" + capitalizedName] || this.constructor["pre" + capitalizedName];
var afterHook = this.constructor["after" + capitalizedName] || this.constructor["post" + capitalizedName];
if (actionName === 'validate') {
beforeHook = beforeHook || this.constructor.beforeValidation;
afterHook = afterHook || this.constructor.afterValidation;
}
var inst = this;
// we only call "before" hook when we have actual action (work) to perform
if (work) {
if (beforeHook) {
// before hook should be called on instance with one param: callback
beforeHook.call(inst, function () {
// actual action also have one param: callback
work.call(inst, next);
}, data);
} else {
work.call(inst, next);
}
} else {
next();
}
function next(done) {
if (afterHook) {
afterHook.call(inst, done);
} else if (done) {
done.call(this);
}
}
};
function capitalize(string) {
return string.charAt(0).toUpperCase() + string.slice(1);
}