Skip to content

Instantly share code, notes, and snippets.

@gavrilaf

gavrilaf/log2.swift

Created November 29, 2020 16:12
Show Gist options

  • Select an option

    Learn more about clone URLs
  • Save gavrilaf/325fa8d605026066cd6eee7fc656bc12 to your computer and use it in GitHub Desktop.

Select an option

Learn more about clone URLs
Save gavrilaf/325fa8d605026066cd6eee7fc656bc12 to your computer and use it in GitHub Desktop.
Download ZIP

Revisions

  1. gavrilaf created this gist Nov 29, 2020.
    80 changes: 80 additions & 0 deletions log2.swift
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,80 @@
    import Foundation
    import os.log

    // MARK:-
    protocol LogHandler {
    func debug(_ msg: String, _ params: [String: Any])
    func info(_ msg: String, _ params: [String: Any])
    func error(_ msg: String, _ params: [String: Any])
    func fatal(_ msg: String, _ params: [String: Any])
    }

    // MARK:-
    struct Log {

    enum P {
    static let err = "error"
    static let fn = "fn"
    static let task = "task"
    static let latency = "latency"
    }

    static func error(_ msg: String, _ err: Error, _ params: [String: Any] = [:], _ fn: String = #function) {
    let newParams = [P.err: err, P.fn: fn].merging(params) { (p, _) in p }
    handler.error(msg, newParams)
    }

    static func debug(_ msg: String, _ params: [String: Any]) {
    handler.debug(msg, params)
    }

    static func info(_ msg: String, _ params: [String: Any]) {
    handler.info(msg, params)
    }

    static func fatal(_ msg: String, _ params: [String: Any]) {
    handler.fatal(msg, params)
    }

    // MARK: -

    static let app = Bundle.main.bundleIdentifier!

    static var handler = DefaultLogHandler(OSLog(subsystem: app, category: "app"))
    }

    // MARK:-
    final class DefaultLogHandler: LogHandler {
    init(_ log: OSLog) {
    self.log = log
    }

    func debug(_ msg: String, _ params: [String: Any]) {
    let s = format(msg: msg, with: params)
    os_log("%@", log: log, type: .debug, s)
    }

    func info(_ msg: String, _ params: [String: Any]) {
    let s = format(msg: msg, with: params)
    os_log("%@", log: log, type: .info, s)
    }

    func error(_ msg: String, _ params: [String: Any]) {
    let s = format(msg: msg, with: params)
    os_log("%@", log: log, type: .error, s)
    }

    func fatal(_ msg: String, _ params: [String: Any]) {
    let s = format(msg: msg, with: params)
    os_log("fatal: %@", log: log, type: .error, s)
    fatalError(s)
    }

    // MARK:-

    private func format(msg: String, with params: [String: Any]) -> String {
    return params.isEmpty ? msg : "\(msg); \(params)"
    }

    private let log: OSLog
    }