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| 1 | +using System.Text; |
| 2 | + |
| 3 | +using Azure.Core; |
| 4 | +using Azure.Monitor.Query; |
| 5 | +using Azure.Monitor.Query.Models; |
| 6 | + |
| 7 | +namespace XtremeIdiots.Portal.Web.Services; |
| 8 | + |
| 9 | +public class AgentTelemetryService( |
| 10 | + LogsQueryClient logsQueryClient, |
| 11 | + IConfiguration configuration, |
| 12 | + ILogger<AgentTelemetryService> logger) : IAgentTelemetryService |
| 13 | +{ |
| 14 | + private const int AgentActiveThresholdMinutes = 5; |
| 15 | + |
| 16 | + public async Task<AgentServerStatus> GetServerStatusAsync(Guid serverId, CancellationToken ct = default) |
| 17 | + { |
| 18 | + var resourceId = GetAppInsightsResourceId(); |
| 19 | + var serverIdStr = serverId.ToString(); |
| 20 | + |
| 21 | + var summaryQuery = new StringBuilder(); |
| 22 | + summaryQuery.Append("customEvents"); |
| 23 | + summaryQuery.Append(" | where timestamp > ago(24h)"); |
| 24 | + summaryQuery.Append($" | where tostring(customDimensions.ServerId) == '{EscapeKql(serverIdStr)}'"); |
| 25 | + summaryQuery.Append(" | summarize lastEvent=max(timestamp),"); |
| 26 | + summaryQuery.Append(" totalEvents=countif(timestamp > ago(1h)),"); |
| 27 | + summaryQuery.Append(" playerConnects=countif(name == 'PlayerConnected' and timestamp > ago(1h)),"); |
| 28 | + summaryQuery.Append(" chatMessages=countif(name == 'ChatMessagePersisted' and timestamp > ago(1h)),"); |
| 29 | + summaryQuery.Append(" bansDetected=countif(name == 'BanImported'),"); |
| 30 | + summaryQuery.Append(" moderationTriggers=countif(name == 'ChatModerationTriggered')"); |
| 31 | + |
| 32 | + var mapQuery = new StringBuilder(); |
| 33 | + mapQuery.Append("customEvents"); |
| 34 | + mapQuery.Append(" | where timestamp > ago(24h)"); |
| 35 | + mapQuery.Append($" | where tostring(customDimensions.ServerId) == '{EscapeKql(serverIdStr)}'"); |
| 36 | + mapQuery.Append(" | where name == 'MapChange'"); |
| 37 | + mapQuery.Append(" | top 1 by timestamp desc"); |
| 38 | + mapQuery.Append(" | project timestamp, mapName=tostring(customDimensions.MapName)"); |
| 39 | + |
| 40 | + var summaryTask = ExecuteQueryAsync(resourceId, summaryQuery.ToString(), TimeSpan.FromHours(24), ct); |
| 41 | + var mapTask = ExecuteQueryAsync(resourceId, mapQuery.ToString(), TimeSpan.FromHours(24), ct); |
| 42 | + |
| 43 | + await Task.WhenAll(summaryTask, mapTask).ConfigureAwait(false); |
| 44 | + |
| 45 | + var summaryResponse = await summaryTask.ConfigureAwait(false); |
| 46 | + var mapResponse = await mapTask.ConfigureAwait(false); |
| 47 | + |
| 48 | + var status = new AgentServerStatus(); |
| 49 | + |
| 50 | + if (summaryResponse.Table.Rows.Count > 0) |
| 51 | + { |
| 52 | + var row = summaryResponse.Table.Rows[0]; |
| 53 | + var columns = summaryResponse.Table.Columns; |
| 54 | + |
| 55 | + var lastEvent = GetDateTimeValue(row, columns, "lastEvent"); |
| 56 | + var totalEvents = GetIntValue(row, columns, "totalEvents"); |
| 57 | + var playerConnects = GetIntValue(row, columns, "playerConnects"); |
| 58 | + var chatMessages = GetIntValue(row, columns, "chatMessages"); |
| 59 | + var bansDetected = GetIntValue(row, columns, "bansDetected"); |
| 60 | + var moderationTriggers = GetIntValue(row, columns, "moderationTriggers"); |
| 61 | + |
| 62 | + var isActive = lastEvent.HasValue && |
| 63 | + (DateTime.UtcNow - lastEvent.Value).TotalMinutes <= AgentActiveThresholdMinutes; |
| 64 | + |
| 65 | + status = status with |
| 66 | + { |
| 67 | + LastEventReceived = lastEvent, |
| 68 | + EventsLastHour = totalEvents, |
| 69 | + PlayersConnectedLastHour = playerConnects, |
| 70 | + ChatMessagesLastHour = chatMessages, |
| 71 | + BansDetectedLast24h = bansDetected, |
| 72 | + ModerationTriggersLast24h = moderationTriggers, |
| 73 | + IsAgentActive = isActive |
| 74 | + }; |
| 75 | + } |
| 76 | + |
| 77 | + if (mapResponse.Table.Rows.Count > 0) |
| 78 | + { |
| 79 | + var row = mapResponse.Table.Rows[0]; |
| 80 | + var columns = mapResponse.Table.Columns; |
| 81 | + |
| 82 | + status = status with |
| 83 | + { |
| 84 | + LastMapChange = GetDateTimeValue(row, columns, "timestamp"), |
| 85 | + LastMapName = GetStringValue(row, columns, "mapName") |
| 86 | + }; |
| 87 | + } |
| 88 | + |
| 89 | + return status; |
| 90 | + } |
| 91 | + |
| 92 | + public async Task<IReadOnlyList<AgentServerSummary>> GetAllServersStatusAsync(CancellationToken ct = default) |
| 93 | + { |
| 94 | + var resourceId = GetAppInsightsResourceId(); |
| 95 | + |
| 96 | + var query = new StringBuilder(); |
| 97 | + query.Append("customEvents"); |
| 98 | + query.Append(" | where timestamp > ago(1h)"); |
| 99 | + query.Append(" | extend serverId = tostring(customDimensions.ServerId)"); |
| 100 | + query.Append(" | where isnotempty(serverId)"); |
| 101 | + query.Append(" | summarize lastEvent=max(timestamp), eventCount=count(),"); |
| 102 | + query.Append(" playerConnects=countif(name == 'PlayerConnected'),"); |
| 103 | + query.Append(" lastMap=take_any(tostring(customDimensions.MapName))"); |
| 104 | + query.Append(" by serverId"); |
| 105 | + query.Append(" | order by lastEvent desc"); |
| 106 | + |
| 107 | + var response = await ExecuteQueryAsync(resourceId, query.ToString(), TimeSpan.FromHours(1), ct).ConfigureAwait(false); |
| 108 | + |
| 109 | + var results = new List<AgentServerSummary>(); |
| 110 | + |
| 111 | + foreach (var row in response.Table.Rows) |
| 112 | + { |
| 113 | + var columns = response.Table.Columns; |
| 114 | + var serverIdStr = GetStringValue(row, columns, "serverId"); |
| 115 | + |
| 116 | + if (!Guid.TryParse(serverIdStr, out var serverId)) |
| 117 | + continue; |
| 118 | + |
| 119 | + var lastEvent = GetDateTimeValue(row, columns, "lastEvent"); |
| 120 | + var isActive = lastEvent.HasValue && |
| 121 | + (DateTime.UtcNow - lastEvent.Value).TotalMinutes <= AgentActiveThresholdMinutes; |
| 122 | + |
| 123 | + results.Add(new AgentServerSummary |
| 124 | + { |
| 125 | + ServerId = serverId, |
| 126 | + LastEventReceived = lastEvent, |
| 127 | + EventsLastHour = GetIntValue(row, columns, "eventCount"), |
| 128 | + PlayerCount = GetIntValue(row, columns, "playerConnects"), |
| 129 | + CurrentMap = GetStringValue(row, columns, "lastMap"), |
| 130 | + IsAgentActive = isActive |
| 131 | + }); |
| 132 | + } |
| 133 | + |
| 134 | + return results; |
| 135 | + } |
| 136 | + |
| 137 | + private async Task<LogsQueryResult> ExecuteQueryAsync( |
| 138 | + string resourceId, string query, TimeSpan timeRange, CancellationToken ct) |
| 139 | + { |
| 140 | + logger.LogDebug("Executing KQL query against App Insights: {Query}", query); |
| 141 | + |
| 142 | + var response = await logsQueryClient.QueryResourceAsync( |
| 143 | + new ResourceIdentifier(resourceId), |
| 144 | + query, |
| 145 | + new QueryTimeRange(timeRange), |
| 146 | + cancellationToken: ct).ConfigureAwait(false); |
| 147 | + |
| 148 | + return response.Value; |
| 149 | + } |
| 150 | + |
| 151 | + private string GetAppInsightsResourceId() |
| 152 | + { |
| 153 | + var resourceId = configuration["ApplicationInsights:ResourceId"]; |
| 154 | + |
| 155 | + if (string.IsNullOrWhiteSpace(resourceId)) |
| 156 | + { |
| 157 | + logger.LogError("ApplicationInsights:ResourceId is not configured"); |
| 158 | + throw new InvalidOperationException( |
| 159 | + "ApplicationInsights:ResourceId must be configured with the full Azure resource ID"); |
| 160 | + } |
| 161 | + |
| 162 | + return resourceId; |
| 163 | + } |
| 164 | + |
| 165 | + private static DateTime? GetDateTimeValue(LogsTableRow row, IReadOnlyList<LogsTableColumn> columns, string columnName) |
| 166 | + { |
| 167 | + var index = FindColumnIndex(columns, columnName); |
| 168 | + if (index < 0) return null; |
| 169 | + |
| 170 | + var value = row[index]; |
| 171 | + if (value is DateTimeOffset dto) return dto.UtcDateTime; |
| 172 | + if (value is DateTime dt) return dt; |
| 173 | + if (DateTime.TryParse(value?.ToString(), out var parsed)) return parsed; |
| 174 | + return null; |
| 175 | + } |
| 176 | + |
| 177 | + private static int GetIntValue(LogsTableRow row, IReadOnlyList<LogsTableColumn> columns, string columnName) |
| 178 | + { |
| 179 | + var index = FindColumnIndex(columns, columnName); |
| 180 | + if (index < 0) return 0; |
| 181 | + |
| 182 | + var value = row[index]; |
| 183 | + if (value is int i) return i; |
| 184 | + if (value is long l) return (int)l; |
| 185 | + if (int.TryParse(value?.ToString(), out var parsed)) return parsed; |
| 186 | + return 0; |
| 187 | + } |
| 188 | + |
| 189 | + private static string? GetStringValue(LogsTableRow row, IReadOnlyList<LogsTableColumn> columns, string columnName) |
| 190 | + { |
| 191 | + var index = FindColumnIndex(columns, columnName); |
| 192 | + if (index < 0) return null; |
| 193 | + return row[index]?.ToString(); |
| 194 | + } |
| 195 | + |
| 196 | + private static int FindColumnIndex(IReadOnlyList<LogsTableColumn> columns, string columnName) |
| 197 | + { |
| 198 | + for (var i = 0; i < columns.Count; i++) |
| 199 | + { |
| 200 | + if (columns[i].Name.Equals(columnName, StringComparison.OrdinalIgnoreCase)) |
| 201 | + return i; |
| 202 | + } |
| 203 | + |
| 204 | + return -1; |
| 205 | + } |
| 206 | + |
| 207 | + private static string EscapeKql(string value) |
| 208 | + { |
| 209 | + return value.Replace("\\", "\\\\").Replace("'", "\\'"); |
| 210 | + } |
| 211 | +} |
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