Tusker/Tusker/Logging.swift

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//
// Logging.swift
// Tusker
//
// Created by Shadowfacts on 10/10/22.
// Copyright © 2022 Shadowfacts. All rights reserved.
//
import Foundation
import OSLog
struct Logging {
private init() {}
static let general = Logger(subsystem: Bundle.main.bundleIdentifier!, category: "General")
static let generalSignposter = OSSignposter(logger: general)
static func getLogData() -> Data? {
do {
let store = try OSLogStore(scope: .currentProcessIdentifier)
// do the filtering ourself, passing position/predicate into getEntries is far slower (priority inversion, I think)
let entries = try store.getEntries()
var data = Data()
let subsystem = Bundle.main.bundleIdentifier!
for entry in entries {
guard let entry = entry as? OSLogEntryLog,
entry.subsystem == subsystem else {
continue
}
data.append(contentsOf: entry.date.formatted(.iso8601).utf8)
data.append(32) // ' '
data.append(91) // '['
data.append(contentsOf: entry.category.utf8)
data.append(93) // ']'
data.append(32) // ' '
data.append(contentsOf: entry.composedMessage.utf8)
data.append(10) // '\n'
}
return data
} catch {
return nil
}
}
static func writeDataForCrash() {
guard let data = getLogData(),
let cacheDir = try? FileManager.default.url(for: .cachesDirectory, in: .userDomainMask, appropriateFor: nil, create: true) else {
return
}
let timestamp = ISO8601DateFormatter().string(from: Date())
let url = cacheDir.appendingPathComponent("Tusker-\(timestamp).log", isDirectory: false)
do {
try data.write(to: url)
UserDefaults.standard.set(url, forKey: "lastCrashLog")
} catch {
// if we can't write the data, oh well, we just won't have logs
}
}
static func logURLForLastCrash() -> URL? {
return UserDefaults.standard.url(forKey: "lastCrashLog")
}
}