Logger for Swift

Logger.swift

//
//  Logger.swift
//
// The MIT License (MIT)
// 
// Copyright (c) 2014 dictav
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

import Foundation

enum Logger: Printable{
    case Debug,Info,Warning,Error,Fatal
    var description: String {
        switch self {
        case .Debug:   return "Debug"
        case .Info:    return "Info"
        case .Warning: return "Warning"
        case .Error:   return "Error"
        case .Fatal:   return "Fatal"
        }
    }
    
    static var logger: String -> () = println
    
    static var dateFormatter: NSDateFormatter = {
        let f = NSDateFormatter()
        f.dateFormat = "yyyy-mm-dd HH:MM:ss.SSS z"
        return f
        }()
    
    private static func _log(m: String, lv: Logger, f: String, fn: String, l: Int) -> String{
        let date = Logger.dateFormatter.stringFromDate(NSDate())
        let text = "\(fn.lastPathComponent):L\(l):\(f) \n → [\(date)] \(lv.description)> \(m)"
        return text
    }
    
    static func debug(message: String, f: String = __FUNCTION__, fn: String = __FILE__, l: Int = __LINE__) {
        #if DEBUG
            logger(_log(message, lv: Logger.Debug, f:f, fn:fn, l:l))
        #endif
    }
    
    static func info(message: String, f: String = __FUNCTION__, fn: String = __FILE__, l: Int = __LINE__) {
        logger(_log(message, lv: Logger.Info, f:f, fn:fn, l:l))
    }
    
    static func warning(message: String, f: String = __FUNCTION__, fn: String = __FILE__, l: Int = __LINE__) {
        logger(_log(message, lv: Logger.Warning, f:f, fn:fn, l:l))
    }
    
    static func error(message: String, f: String = __FUNCTION__, fn: String = __FILE__, l: Int = __LINE__) {
        logger(_log(message, lv: Logger.Error, f:f, fn:fn, l:l))
    }
    
    static func fatal(message: String, f: String = __FUNCTION__, fn: String = __FILE__, l: Int = __LINE__) {
        logger(_log(message, lv: Logger.Fatal, f:f, fn:fn, l:l))
        abort()
    }
    
}