Mercurial > servermonitor

annotate ServerMonitor/Objects/CheckResult.cs @ 29:f6235dc0a8ec

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Add ability to play a sound on check failure.
author Brad Greco <brad@bgreco.net>
date Fri, 14 Jun 2019 21:01:55 -0400
parents 68d7834dc28e
children
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1 using ServerMonitorApp.Properties;
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2 using System;
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3
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4 namespace ServerMonitorApp
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5 {
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6 /// <summary>
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7 /// The result of an executed check.
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8 /// Contains data about the check's last execution including status, time, and log message.
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9 /// </summary>
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10 public class CheckResult
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11 {
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12 // The date format to use in log files.
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13 private const string dateFormat = "yyyy-MM-dd HH:mm:ss.fff";
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15 /// <summary>The originating check of this check result.</summary>
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16 public Check Check { get; private set; }
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17
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18 /// <summary>The result status of the check execution.</summary>
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19 public CheckStatus CheckStatus { get; private set; }
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20
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21 /// <summary>The message generated by the check execution.</summary>
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22 public string Message { get; set; }
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24 /// <summary>The time the check execution began.</summary>
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25 public DateTime StartTime { get; set; }
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26
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27 /// <summary>The time the check execution ended.</summary>
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28 public DateTime EndTime { get; set; }
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29
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30 /// <summary>Whether the check execution resulted in success or failure.</summary>
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31 public bool Failed => CheckStatus.In(CheckStatus.Error, CheckStatus.Warning, CheckStatus.Information);
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32
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33 /// <summary>Action to perform when the check fails.</summary>
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34 public FailAction FailAction
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35 {
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36 get
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37 {
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38 // Use the global preferences for each status to determine the action to take.
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39 switch (CheckStatus)
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40 {
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41 case CheckStatus.Error: return Settings.Default.ErrorAction;
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42 case CheckStatus.Warning: return Settings.Default.WarningAction;
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43 case CheckStatus.Information: return Settings.Default.InformationAction;
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44 // On success (or any other status), do nothing.
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45 default: return FailAction.None;
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46 }
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47 }
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48 }
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49
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50 /// <summary>Sound to play when the check fails.</summary>
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51 /// <remarks>
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52 /// Returns null if no sound should be played.
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53 /// Returns string.Empty if the Windows default error sound should be played.
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54 /// Otherwise, returns the path to the custom sound file that should be played.
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55 /// </remarks>
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56 public string FailSound
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57 {
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58 get
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59 {
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60 string setting = null;
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61 // Use the global preferences for each status to determine the action to take.
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62 switch (CheckStatus)
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63 {
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64 case CheckStatus.Error: setting = Settings.Default.ErrorSound; break;
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65 case CheckStatus.Warning: setting = Settings.Default.WarningSound; break;
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66 case CheckStatus.Information: setting = Settings.Default.InformationSound; break;
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67 // On success (or any other status), do nothing.
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68 }
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69 if (int.TryParse(setting, out int index)) {
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70 return index == 0 ? null : string.Empty;
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71 }
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72 return setting;
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73 }
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74 }
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75
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76 /// <summary>CheckResult constructor.</summary>
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77 /// <param name="check">The originating check of this check result.</param>
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78 /// <param name="status">The result status of the check execution.</param>
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79 /// <param name="message">The message generated by the check execution.</param>
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80 public CheckResult(Check check, CheckStatus status, string message)
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81 {
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82 Check = check;
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83 CheckStatus = status;
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84 Message = message;
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85 }
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86
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87 /// <summary>Generates a string representation of the check result that can be logged.</summary>
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88 /// <returns>A string representation of the check result that can be logged.</returns>
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89 /// <remarks>
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90 /// The log string is in the format:
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91 /// [Check ID] [Start time] [End time] [Check status] [Check output]
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92 ///
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93 /// The check ID is left-padded with zeros to simplify log parsing and filtering by check ID.
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94 /// Dates are formatted according to the dateFormat defined in this class.
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95 /// Newlines in check output are escaped so the log string contains no literal newline characters.
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96 /// </remarks>
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97 public string ToLogString()
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98 {
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99 return string.Format("{0:00000} {1} {2} {3} {4}",
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100 Check.Id,
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101 StartTime.ToString(dateFormat),
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102 EndTime.ToString(dateFormat),
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103 CheckStatus,
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104 Message.ConvertNewlines().Replace("\n", "\\n"));
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105 }
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106
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107 /// <summary>Parses a log string to create a check result object.</summary>
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108 /// <param name="check">The originating check for the check result.</param>
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109 /// <param name="logString">The log string to parse.</param>
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110 /// <returns>A check result object.</returns>
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111 public static CheckResult FromLogString(Check check, string logString)
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112 {
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113 // The check ID, start time, and end time are fixed in length, so no pattern matching is needed.
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114 DateTime startTime = DateTime.Parse(logString.Substring(6, 23));
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115 DateTime endTime = DateTime.Parse(logString.Substring(30, 23));
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116 // The check status is not fixed in length, but will not contain any spaces.
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117 // So, the first space following the beginning of the checks status will
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118 // mark the start of the result message.
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119 int messageStartPos = logString.IndexOf(' ', 54);
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120 // Now we know the length of the status token, so we can extract and parse it.
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121 Enum.TryParse(logString.Substring(54, messageStartPos - 54), out CheckStatus status);
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122 // Put it all together.
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123 return new CheckResult(check, status, logString.Substring(messageStartPos + 1)) { StartTime = startTime, EndTime = endTime };
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124 }
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125 }
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126 }