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using System.Diagnostics;
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namespace LDClient.detection {
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public class InfoFetcher {
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private const string UndefinedSerialNumber = "number";
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private readonly string _f32RemExecutable;
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private readonly string[] _f32RemArguments;
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private readonly int _f32SuccessExitCode;
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private readonly int _f32WaitTimeoutMs;
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private readonly uint _maxAttempts;
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private readonly uint _waitPeriodMs;
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private readonly string _infoFilePath;
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public string HeadSerialNumber { get; private set; } = UndefinedSerialNumber;
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public string BodySerialNumber { get; private set; } = UndefinedSerialNumber;
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public InfoFetcher(uint maxAttempts, uint waitPeriodMs, string infoFilePath, string f32RemExecutable, string[] f32RemArguments, int f32SuccessExitCode, int f32WaitTimeoutMs) {
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_maxAttempts = maxAttempts;
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_waitPeriodMs = waitPeriodMs;
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_infoFilePath = infoFilePath;
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_f32RemExecutable = f32RemExecutable;
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_f32RemArguments = f32RemArguments;
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_f32SuccessExitCode = f32SuccessExitCode;
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_f32WaitTimeoutMs = f32WaitTimeoutMs;
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}
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public async Task<bool> FetchDataAsync() {
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Program.DefaultLogger.Info("Fetching data from the debugger.");
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var success = SendRetrieveInfoCommands(_f32RemExecutable, _f32RemArguments, _f32SuccessExitCode, _f32WaitTimeoutMs);
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if (!success) {
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Program.DefaultLogger.Error("Failed to fetch data from the debugger.");
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return false;
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}
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for (var i = 0; i < _maxAttempts; i++) {
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Program.DefaultLogger.Info($"{i}. attempt to parse the info file.");
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if (RetrieveDebuggerInfo(_infoFilePath)) {
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Program.DefaultLogger.Info($"Info file has been parsed successfully.");
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return true;
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}
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await Task.Delay((int)_waitPeriodMs);
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}
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Program.DefaultLogger.Error("Failed to parse the into file. It may have not been created.");
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return false;
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}
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private bool RetrieveDebuggerInfo(string filePath) {
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try {
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var fileContent = File.ReadAllLines(filePath).Aggregate("", (current, line) => $"{current}{line}\n");
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var (headSerialNumber, bodySerialNumber) = DebuggerInfoParser.Parse(fileContent);
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HeadSerialNumber = headSerialNumber;
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BodySerialNumber = bodySerialNumber;
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File.Delete(filePath);
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} catch (Exception exception) {
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Program.DefaultLogger.Error($"Failed to retrieve debugger info. File {filePath} may not exist or it does not have the right format. {exception.Message}");
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return false;
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}
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return true;
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}
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private static bool SendRetrieveInfoCommands(string executableFile, IReadOnlyList<string>? arguments, int successExitCode, int waitTimeoutMs) {
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if (arguments == null) {
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Program.DefaultLogger.Error($"Failed to run {executableFile} - no parameters were given");
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return false;
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}
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foreach (var argument in arguments) {
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var t32RemProcess = new Process();
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t32RemProcess.StartInfo.FileName = executableFile;
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t32RemProcess.StartInfo.Arguments = argument;
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try {
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t32RemProcess.Start();
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t32RemProcess.WaitForExit(waitTimeoutMs);
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if (t32RemProcess.ExitCode != successExitCode) {
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return false;
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}
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} catch (Exception exception) {
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Program.DefaultLogger.Error($"Failed to run {executableFile} {argument}. {exception.Message}");
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return false;
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}
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}
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return true;
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}
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}
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}
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