text: /*
  	MIT License http://www.opensource.org/licenses/mit-license.php
  	Author Tobias Koppers @sokra
  */
  "use strict";
  
  class IgnorePlugin {
  	constructor(resourceRegExp, contextRegExp) {
  		this.resourceRegExp = resourceRegExp;
  		this.contextRegExp = contextRegExp;
  
  		this.checkIgnore = this.checkIgnore.bind(this);
  	}
  
  	/*
  	 * Only returns true if a "resourceRegExp" exists
  	 * and the resource given matches the regexp.
  	 */
  	checkResource(resource) {
  		if (!this.resourceRegExp) {
  			return false;
  		}
  		return this.resourceRegExp.test(resource);
  	}
  
  	/*
  	 * Returns true if contextRegExp does not exist
  	 * or if context matches the given regexp.
  	 */
  	checkContext(context) {
  		if (!this.contextRegExp) {
  			return true;
  		}
  		return this.contextRegExp.test(context);
  	}
  
  	/*
  	 * Returns true if result should be ignored.
  	 * false if it shouldn't.
  	 *
  	 * Not that if "contextRegExp" is given, both the "resourceRegExp"
  	 * and "contextRegExp" have to match.
  	 */
  	checkResult(result) {
  		if (!result) {
  			return true;
  		}
  		return (
  			this.checkResource(result.request) && this.checkContext(result.context)
  		);
  	}
  
  	checkIgnore(result) {
  		// check if result is ignored
  		if (this.checkResult(result)) {
  			return null;
  		}
  		return result;
  	}
  
  	apply(compiler) {
  		compiler.hooks.normalModuleFactory.tap("IgnorePlugin", nmf => {
  			nmf.hooks.beforeResolve.tap("IgnorePlugin", this.checkIgnore);
  		});
  		compiler.hooks.contextModuleFactory.tap("IgnorePlugin", cmf => {
  			cmf.hooks.beforeResolve.tap("IgnorePlugin", this.checkIgnore);
  		});
  	}
  }
  
  module.exports = IgnorePlugin;
  