56 lines
2 KiB
Swift
56 lines
2 KiB
Swift
//
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// Copyright 2023 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import CocoaLumberjack
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import Foundation
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final class LogFormatter: NSObject, DDLogFormatter {
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func format(message logMessage: DDLogMessage) -> String? {
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return Self.formatLogMessage(logMessage, modifiedMessage: nil)
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}
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static func formatLogMessage(_ logMessage: DDLogMessage, modifiedMessage: String?) -> String {
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let timestamp = dateFormatter.string(from: logMessage.timestamp)
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let level = Self.formattedLevel(for: logMessage.flag)
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let location = Self.formattedLocation(logMessage: logMessage)
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let message = modifiedMessage ?? logMessage.message
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return "\(timestamp) \(level) \(location)\(message)"
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}
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private static let dateFormatter: DateFormatter = {
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// Copied from DDLogFileFormatterDefault.
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let formatter = DateFormatter()
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formatter.formatterBehavior = .behavior10_4
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formatter.locale = Locale(identifier: "en_US_POSIX")
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formatter.timeZone = TimeZone(secondsFromGMT: 0)
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formatter.dateFormat = "yyyy/MM/dd HH:mm:ss:SSS"
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return formatter
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}()
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private static func formattedLevel(for flag: DDLogFlag) -> String {
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if flag.contains(.error) { return "❤️" }
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if flag.contains(.warning) { return "🧡" }
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if flag.contains(.info) { return "💛" }
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if flag.contains(.debug) { return "💚" }
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if flag.contains(.verbose) { return "💙" }
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return "💜"
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}
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private static func formattedLocation(logMessage: DDLogMessage) -> String {
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// We format the filename & line number in a format compatible
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// with Xcode's "Open Quickly..." feature.
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let file = logMessage.file
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let line = logMessage.line
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let function = logMessage.function ?? ""
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let spacer = function.isEmpty ? "" : " "
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if file.isEmpty, line == 0, function.isEmpty {
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return ""
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}
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return "[\(file):\(line)\(spacer)\(function)]: "
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}
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}
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