maksarsanjeev
50 lines
2.3 KiB
Swift
50 lines
2.3 KiB
Swift
import Foundation
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// MARK: - Shared diagnostic log helpers
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/// Escapes ASCII control characters so log lines can't inject terminal sequences.
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func escapedForLog(_ s: String) -> String {
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s.unicodeScalars.map { sc -> String in
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let v = sc.value
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return (v < 0x20 || v == 0x7F) ? "\\u\(String(format: "%04X", v))" : String(sc)
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}.joined()
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}
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/// Appends one timestamped line to `~/Library/Logs/NotchBuddy/<fileName>`.
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/// - Log directory is created at mode 0700.
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/// - Log file is set to mode 0600 on first creation and after each rotation.
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/// - File is rotated (truncated) when it reaches 1 MB.
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func appendAppLog(_ fileName: String, _ message: String,
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timestampFormat: String = "yyyy-MM-dd HH:mm:ss") {
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let fm = FileManager.default
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let logsDir = fm.urls(for: .libraryDirectory, in: .userDomainMask)[0]
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.appendingPathComponent("Logs/NotchBuddy")
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try? fm.createDirectory(at: logsDir, withIntermediateDirectories: true)
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try? fm.setAttributes([.posixPermissions: 0o700 as NSNumber], ofItemAtPath: logsDir.path)
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let logFile = logsDir.appendingPathComponent(fileName)
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let f = DateFormatter(); f.dateFormat = timestampFormat
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let line = "\(f.string(from: Date())) \(escapedForLog(message))\n"
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guard let data = line.data(using: .utf8) else { return }
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let maxLogBytes = 1_048_576 // 1 MB
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if fm.fileExists(atPath: logFile.path) {
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// Rotate when the file reaches the limit
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let size = (try? fm.attributesOfItem(atPath: logFile.path)[.size] as? Int) ?? 0
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if size >= maxLogBytes {
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try? fm.removeItem(at: logFile)
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try? data.write(to: logFile, options: .atomic)
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try? fm.setAttributes([.posixPermissions: 0o600 as NSNumber], ofItemAtPath: logFile.path)
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return
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}
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if let handle = try? FileHandle(forWritingTo: logFile) {
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handle.seekToEndOfFile()
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handle.write(data)
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try? handle.close()
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}
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// Ensure permissions even on existing files (idempotent)
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try? fm.setAttributes([.posixPermissions: 0o600 as NSNumber], ofItemAtPath: logFile.path)
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} else {
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try? data.write(to: logFile, options: .atomic)
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try? fm.setAttributes([.posixPermissions: 0o600 as NSNumber], ofItemAtPath: logFile.path)
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}
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}
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