import Foundation
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enum Diagnostics {
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private static let enabledKey = "diagnosticLoggingEnabled"
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private static let queue = DispatchQueue(label: "com.taglauncher.app.diagnostics")
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static var logURL: URL {
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AppIdentity.applicationSupportDirectory
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.appendingPathComponent("TagLauncher-diagnostics.log")
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}
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static func log(_ event: String, _ fields: [String: CustomStringConvertible?] = [:]) {
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guard UserDefaults.standard.bool(forKey: enabledKey) else { return }
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let timestamp = ISO8601DateFormatter().string(from: Date())
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let suffix = fields
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.sorted { $0.key < $1.key }
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.map { key, value in "\(key)=\(value?.description ?? "nil")" }
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.joined(separator: " ")
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let line = suffix.isEmpty
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? "\(timestamp) \(event)\n"
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: "\(timestamp) \(event) \(suffix)\n"
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queue.async {
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do {
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try FileManager.default.createDirectory(
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at: AppIdentity.applicationSupportDirectory,
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withIntermediateDirectories: true
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)
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if !FileManager.default.fileExists(atPath: logURL.path) {
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FileManager.default.createFile(atPath: logURL.path, contents: nil)
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}
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let handle = try FileHandle(forWritingTo: logURL)
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defer { try? handle.close() }
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try handle.seekToEnd()
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if let data = line.data(using: .utf8) {
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try handle.write(contentsOf: data)
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}
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} catch {
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fputs("[TagLauncher] Diagnostics log failed: \(error)\n", stderr)
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}
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}
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}
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}
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