network_event_log_summary.js

// Copyright 2020 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 for processing network_event_log messages.
 */

let networkEventLogSummary = {};

/**
 * Objects holding regexs and handlers for log subsections
 * @type {Object}
 */
networkEventLogSummary.taggedLines = {
  'error': {
    re: /(ERROR )(.*$)/,
    handler: function(result) {
      return 'error';
    }
  },
  'user': {
    re: /(USER )(.*$)/,
    handler: function(result) {
      return 'user';
    }
  },
};

/**
 * @param {Array<string>} logLines
 * @param {LogSummary} logSummary
 * @return {Array<Object>} Returns an Array of Objects with text and anchor
 *     labels if the log was processed, null if |logLines| is invalid.
 */
networkEventLogSummary.processLogLines = function(logLines, logSummary) {
  const logType = 'eventLog';
  let logStart = -1;
  let logText = [];

  for (var i = 0; i < logLines.length; i++) {
    // do we have a start time?
    const time = logLines[i].match(logHelper.TIME_FORMAT);
    if (time == null) {
      console.log('logline: ', logLines[i]);
      console.log('not a valid time...  continue');
      continue;
    }
    logHelper.getOffsetMS(time);
    const timeCheck = Date.parse(time[0]);
    if (logStart == -1 && time !== null) {
      logStart = time[0];
      logSummary.logStartTime = timeCheck;
      logSummary.prevLogLineTime = logSummary.logStartTime;
    }
    if (timeCheck < logSummary.logEndTime) {
      console.log('warning: log time has rolled back, check timezone');
    } else {
      logSummary.logEndTime = timeCheck;
      logSummary.prevLogLineTime = timeCheck;
    }
    console.log('log_line: ' + logLines[i]);
    var tempLogText = {text: logLines[i],
                       tag: null,
                       type: 'basic',
                       file: logType,
                       ts: timeCheck};
    for (var taggedLine in networkEventLogSummary.taggedLines) {
      var result =
          logLines[i].match(networkEventLogSummary.taggedLines[taggedLine].re);
      if (result !== null) {
        tempLogText.type =
            networkEventLogSummary.taggedLines[taggedLine].handler(result);
        tempLogText.tag = time[0];
        break;
      }
    }

    logText.push(tempLogText);
  }

  console.log('this is the end of our log...');

  return logText;
};