syslog_summary.js

// Copyright 2015 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
'use strict';

/**
 * @fileoverview Class to hold methods for processing syslog messages.
 */

var syslogSummary = {};

/**
 * RegExp for kernel info logging lines.
 * @type {RegExp}
 */
syslogSummary.KERNEL_INFO = / kernel: \[/;

/**
 * This method processes each log line in the supplied String array.  Each log
 * line is checked to see if matches one of the regular expressions from the
 * logHelper.  Each flagged log line is then processed.
 *
 * @param {String[]} logLines String array for lines in a log.
 * @return {Object[]} Returns an Object[] of text and anchor labels if the log
 * was processed, null if the log is not a recognized format.
 */
syslogSummary.processLogLines = function(logLines) {
  var logText = [];
  var time;
  for (var i = 0; i < logLines.length; i++) {
    time = null;
    time = logLines[i].match(logHelper.TIME_FORMAT);
    if (time == null) {
      continue;
    }
    var timeCheck = Date.parse(time[0]);
    var tempLogText = {text: logLines[i],
                       tag: time[0],
                       type: 'basic',
                       file: 'syslog',
                       ts: timeCheck};
    tempLogText.tag = null;
    logText.push(tempLogText);
  }
  return logText;
};

/**
 * This method processes each log line in the supplied String array to determine
 * if the log is a syslog.
 *
 * @param {String[]} logLines String array for lines in a log.
 * @return {boolean} Returns true is the log is a syslog, false otherwise.
 */
syslogSummary.syslogTypeCheck = function(logLines) {
  for (var i = 0; i < logLines.length; i++) {
    if (syslogSummary.KERNEL_INFO.test(logLines[i])) {
        return true;
    }
  }
  return false;
};