text: /**
   * Pattern matcher plugin
   *
   * Adds the ability to HTTP & HTTPS pollers to test the response body against a pattern
   *
   * Installation
   * ------------
   * This plugin is enabled by default. To disable it, remove its entry 
   * from the `plugins` key of the configuration:
   *
   *   // in config/production.yaml
   *   plugins:
   *     # - ./plugins/patternMatcher
   *
   * Usage
   * -----
   * Add a pattern to http checks in the dashboard UI.
   * Patterns are regexp, for instance '/hello/i'.
   *
   * When Uptime polls a check with a pattern, it tests the pattern against the 
   * response body. If the pattern is not found, the check is considered failed.
   */
  var fs   = require('fs');
  var ejs  = require('ejs');
  
  var matchPattern = '^/(.*?)/(g?i?m?y?)$';
  var template = fs.readFileSync(__dirname + '/views/_detailsEdit.ejs', 'utf8');
  
  exports.initWebApp = function(options) {
  
    var dashboard = options.dashboard;
  
  	dashboard.on('populateFromDirtyCheck', function(checkDocument, dirtyCheck, type) {
  		if (type !== 'http' && type !== 'https') return;
      var match = dirtyCheck.match;
      if (match) {
        if (match.indexOf('/') !== 0) {
          match = '/' + match + '/';
        }
        var matchParts = match.match(new RegExp(matchPattern));
        try {
          // check that the regexp doesn't crash
          new RegExp(matchParts[1], matchParts[2]);
        } catch (e) {
          throw new Error('Malformed regular expression ' + dirtyCheck.match);
        }
      }
      checkDocument.setPollerParam('match', match);
  	});
  
    dashboard.on('checkEdit', function(type, check, partial) {
      if (type !== 'http' && type !== 'https') return;
      partial.push(ejs.render(template, { check: check }));
    });
  
  };
  
  exports.initMonitor = function(options) {
  
    options.monitor.on('pollerPolled', function(check, time, res, details) {
      if (check.type !== 'http' && check.type !== 'https') return;
      var pattern = check.pollerParams && check.pollerParams.match;
      if (!pattern) return;
      var matchParts = pattern.match(new RegExp(matchPattern));
      var regexp;
      try {
        // check that the regexp doesn't crash (should only happen if the data was altered in the database)
        regexp = new RegExp(matchParts[1], matchParts[2]);
      } catch (e) {
        throw new Error('Malformed pattern in check configuration: ' + pattern);
      }
      if (!res.body.match(regexp)) {
        throw new Error('Response body does not match pattern ' + pattern);
      }
      return;
    });
  
  };
  