101 lines
3.0 KiB
JavaScript
101 lines
3.0 KiB
JavaScript
// Copyright IBM Corp. 2013,2016. All Rights Reserved.
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// Node module: loopback-datasource-juggler
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// This file is licensed under the MIT License.
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// License text available at https://opensource.org/licenses/MIT
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var deprecated = require('depd')('loopback-datasource-juggler');
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/*!
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* Module exports
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*/
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module.exports = Hookable;
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/*
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* Hooks object.
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* @class Hookable
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*/
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function Hookable() {
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}
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/**
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* List of hooks available
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*/
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Hookable.afterInitialize = null;
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Hookable.beforeValidate = null;
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Hookable.afterValidate = null;
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Hookable.beforeSave = null;
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Hookable.afterSave = null;
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Hookable.beforeCreate = null;
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Hookable.afterCreate = null;
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Hookable.beforeUpdate = null;
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Hookable.afterUpdate = null;
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Hookable.beforeDestroy = null;
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Hookable.afterDestroy = null;
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// TODO: Evaluate https://github.com/bnoguchi/hooks-js/
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Hookable.prototype.trigger = function trigger(actionName, work, data, callback) {
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var capitalizedName = capitalize(actionName);
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var beforeHook = this.constructor['before' + capitalizedName]
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|| this.constructor['pre' + capitalizedName];
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var afterHook = this.constructor['after' + capitalizedName]
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|| this.constructor['post' + capitalizedName];
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if (actionName === 'validate') {
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beforeHook = beforeHook || this.constructor.beforeValidation;
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afterHook = afterHook || this.constructor.afterValidation;
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}
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var inst = this;
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if (actionName !== 'initialize') {
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if (beforeHook)
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deprecateHook(inst.constructor, ['before', 'pre'], capitalizedName);
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if (afterHook)
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deprecateHook(inst.constructor, ['after', 'post'], capitalizedName);
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}
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// we only call "before" hook when we have actual action (work) to perform
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if (work) {
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if (beforeHook) {
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// before hook should be called on instance with two parameters: next and data
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beforeHook.call(inst, function() {
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// Check arguments to next(err, result)
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if (arguments.length) {
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return callback && callback.apply(null, arguments);
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}
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// No err & result is present, proceed with the real work
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// actual action also have one param: callback
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work.call(inst, next);
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}, data);
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} else {
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work.call(inst, next);
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}
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} else {
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next();
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}
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function next(done) {
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if (afterHook) {
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afterHook.call(inst, done);
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} else if (done) {
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done.call(this);
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}
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}
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};
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function capitalize(string) {
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return string.charAt(0).toUpperCase() + string.slice(1);
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}
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function deprecateHook(ctor, prefixes, capitalizedName) {
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var candidateNames = prefixes.map(function(p) { return p + capitalizedName; });
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if (capitalizedName === 'Validate')
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candidateNames.push(prefixes[0] + 'Validation');
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var hookName = candidateNames.filter(function(hook) { return !!ctor[hook]; })[0];
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if (!hookName) return; // just to be sure, this should never happen
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if (ctor.modelName) hookName = ctor.modelName + '.' + hookName;
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deprecated('Model hook "' + hookName + '" is deprecated, ' +
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'use Operation hooks instead. ' +
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'http://docs.strongloop.com/display/LB/Operation+hooks');
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}
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