Swift Package Manager support

Sources/Logging/CoreStoreLogger.swift

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+//
+//  CoreStoreLogger.swift
+//  CoreStore
+//
+//  Copyright © 2015 John Rommel Estropia
+//
+//  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
+
+
+// MARK: - LogLevel
+
+/**
+ The `LogLevel` indicates the severity of a log message.
+ */
+public enum LogLevel {
+    
+    case Trace
+    case Notice
+    case Warning
+    case Fatal
+}
+
+
+// MARK: - CoreStoreLogger
+
+/**
+ Custom loggers should implement the `CoreStoreLogger` protocol and pass its instance to `CoreStore.logger`. Calls to `log(...)`, `handleError(...)`, and `assert(...)` are not tied to a specific queue/thread, so it is the implementer's job to handle thread-safety.
+ */
+public protocol CoreStoreLogger {
+    
+    /**
+     Handles log messages sent by the `CoreStore` framework.
+     
+     :level: the severity of the log message
+     :message: the log message
+     :fileName: the source file name
+     :lineNumber: the source line number
+     :functionName: the source function name
+     */
+    func log(level level: LogLevel, message: String, fileName: StaticString, lineNumber: Int, functionName: StaticString)
+    
+    /**
+     Handles errors sent by the `CoreStore` framework.
+     
+     :error: the error
+     :message: the error message
+     :fileName: the source file name
+     :lineNumber: the source line number
+     :functionName: the source function name
+     */
+    func handleError(error error: NSError, message: String, fileName: StaticString, lineNumber: Int, functionName: StaticString)
+    
+    /**
+     Handles assertions made throughout the `CoreStore` framework.
+     
+     :condition: the assertion condition
+     :message: the assertion message
+     :fileName: the source file name
+     :lineNumber: the source line number
+     :functionName: the source function name
+     */
+    func assert(@autoclosure condition: () -> Bool, message: String, fileName: StaticString, lineNumber: Int, functionName: StaticString)
+}
+
+
+// MARK: - Utilities
+
+internal func typeName<T>(value: T) -> String {
+    
+    return "'\(String(reflecting: value.dynamicType))'"
+}
+
+internal func typeName<T>(value: T.Type) -> String {
+    
+    return "'\(value)'"
+}
+
+internal func typeName(value: AnyClass) -> String {
+    
+    return "'\(value)'"
+}
+
+internal func typeName(name: String?) -> String {
+    
+    return "<\(name ?? "unknown")>"
+}