112 lines
3.1 KiB
JavaScript
112 lines
3.1 KiB
JavaScript
(function() {
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'use strict';
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window.utils = window.utils || {};
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var registeredSetupListeners = {};
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var activeInstances = {};
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/**
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* setup function to initiate a util (utilName) on a scope (sope) with options (options).
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*
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* Utils need to be defined as property of `window.utils` and need to accept a scope and (optionally) options.
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* Example: `window.utils.autoSubmit = function(scope, options) { ... };`
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*/
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window.utils.setup = function(utilName, scope, options) {
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if (!utilName || !scope) {
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return;
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}
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options = options || {};
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var utilInstance;
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// i18n
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if (window.I18N) {
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options.i18n = window.I18N;
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}
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if (activeInstances[utilName]) {
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var instanceWithSameScope = activeInstances[utilName]
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.filter(function(instance) { return !!instance; })
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.find(function(instance) {
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return instance.scope === scope;
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});
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var isAlreadySetup = !!instanceWithSameScope;
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if (isAlreadySetup) {
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console.warn('Trying to setup a JS utility that\'s already been set up', { utility: utilName, scope, options });
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}
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}
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function setup() {
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var listener = function(event) {
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if (event.detail.targetUtil !== utilName) {
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return false;
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}
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if (options.setupFunction) {
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utilInstance = options.setupFunction(scope, options);
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} else {
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var util = window.utils[utilName];
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if (!util) {
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throw new Error('"' + utilName + '" is not a known js util');
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}
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utilInstance = util(scope, options);
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}
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if (utilInstance) {
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if (activeInstances[utilName] && Array.isArray(activeInstances[utilName])) {
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activeInstances[utilName].push(utilInstance);
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} else {
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activeInstances[utilName] = [ utilInstance ];
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}
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}
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};
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if (registeredSetupListeners[utilName] && Array.isArray(registeredSetupListeners[utilName])) {
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window.utils.teardown(utilName);
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}
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if (!registeredSetupListeners[utilName] || Array.isArray(registeredSetupListeners[utilName])) {
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registeredSetupListeners[utilName] = [];
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}
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registeredSetupListeners[utilName].push(listener);
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document.addEventListener('setup', listener);
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document.dispatchEvent(new CustomEvent('setup', {
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detail: { targetUtil: utilName, module: 'none' },
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bubbles: true,
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cancelable: true,
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}));
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}
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setup();
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return utilInstance;
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};
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window.utils.teardown = function(utilName, destroy) {
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if (registeredSetupListeners[utilName]) {
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registeredSetupListeners[utilName]
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.filter(function(listener) { return !!listener })
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.forEach(function(listener) {
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document.removeEventListener('setup', listener);
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});
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delete registeredSetupListeners[utilName];
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}
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if (destroy === true && activeInstances[utilName]) {
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activeInstances[utilName]
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.filter(function(instance) { return !!instance })
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.forEach(function(instance) {
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instance.destroy();
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});
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delete activeInstances[utilName];
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}
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}
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})();
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