StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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119 lines
3.2 KiB
119 lines
3.2 KiB
4 years ago
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'use strict';
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var debug = require('debug')('base:engines');
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var utils = require('./utils');
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module.exports = function(options) {
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return function baseEngines(app) {
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if (!utils.isValid(app, 'base-engines', ['app', 'collection', 'views', 'list'])) {
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return;
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}
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if (typeof this._ === 'undefined') {
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utils.define(this, '_', {});
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}
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this.engines = this.engines || {};
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this._.engines = new utils.Engines(this.engines);
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this._.helpers = {
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async: {},
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sync: {}
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};
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/**
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* Register a view engine callback `fn` as `ext`. Calls `.setEngine`
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* and `.getEngine` internally.
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*
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* ```js
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* app.engine('hbs', require('engine-handlebars'));
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*
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* // using consolidate.js
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* var engine = require('consolidate');
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* app.engine('jade', engine.jade);
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* app.engine('swig', engine.swig);
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*
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* // get a registered engine
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* var swig = app.engine('swig');
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* ```
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* @name .engine
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* @param {String|Array} `exts` String or array of file extensions.
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* @param {Function|Object} `fn` or `settings`
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* @param {Object} `settings` Optionally pass engine options as the last argument.
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* @api public
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*/
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this.define('engine', function(exts, fn, settings) {
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if (arguments.length === 1 && typeof exts === 'string') {
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return this.getEngine(exts);
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}
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if (!Array.isArray(exts) && typeof exts !== 'string') {
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throw new TypeError('expected engine ext to be a string or array.');
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}
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if (settings === 'function') {
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return this.engine(exts, settings, fn);
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}
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utils.arrayify(exts).forEach(function(ext) {
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this.setEngine(ext, fn, settings);
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}.bind(this));
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return this;
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});
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/**
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* Register engine `ext` with the given render `fn` and/or `settings`.
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*
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* ```js
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* app.setEngine('hbs', require('engine-handlebars'), {
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* delims: ['<%', '%>']
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* });
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* ```
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* @name .setEngine
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* @param {String} `ext` The engine to set.
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* @api public
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*/
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this.define('setEngine', function(ext, fn, settings) {
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debug('registering engine "%s"', ext);
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settings = settings || {};
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ext = utils.formatExt(ext);
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if (settings.default === true) {
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this._.engines.defaultEngine = ext;
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}
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this._.engines.setEngine(ext, fn, settings);
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return this;
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});
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/**
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* Get registered engine `ext`.
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*
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* ```js
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* app.engine('hbs', require('engine-handlebars'));
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* var engine = app.getEngine('hbs');
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* ```
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* @name .getEngine
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* @param {String} `ext` The engine to get.
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* @api public
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*/
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this.define('getEngine', function(ext, fallback) {
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debug('getting engine "%s"', ext);
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if (!utils.isString(ext)) {
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ext = this.options['view engine']
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|| this.options.viewEngine
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|| this.options.engine;
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}
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if (utils.isString(ext)) {
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ext = utils.formatExt(ext);
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var engine = this._.engines.getEngine(ext);
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if (!engine && this.options.engine && fallback !== false) {
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return this.getEngine(this.options.engine, false);
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}
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return engine;
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}
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});
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return baseEngines;
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};
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};
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