Rework Swift logging.

SignalServiceKit/src/Util/OWSLogger.h

@@ -7,7 +7,6 @@ NS_ASSUME_NONNULL_BEGIN
 /**
  * A minimal DDLog wrapper for swift.
  */
-NS_SWIFT_NAME(Logger)
 @interface OWSLogger : NSObject
 
 + (void)verbose:(NSString *)logString;

SignalServiceKit/src/Util/OWSLogger.swift

@@ -0,0 +1,67 @@
+//
+//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
+//
+
+import Foundation
+
+// Once we're on Swift4.2 we can mark this as inlineable
+// @inlinable
+public func owsFormatLogMessage(_ logString: String,
+                    file: String = #file,
+                    function: String = #function,
+                    line: Int = #line) -> String {
+    let filename = (file as NSString).lastPathComponent
+    // We format the filename & line number in a format compatible
+    // with XCode's "Open Quickly..." feature.
+    return "[\(filename):\(line) \(function)]: \(logString)"
+}
+
+/**
+ * A minimal DDLog wrapper for swift.
+ */
+open class Logger: NSObject {
+
+    open class func verbose(_ logString: String,
+                            file: String = #file,
+                            function: String = #function,
+                            line: Int = #line) {
+        let message = owsFormatLogMessage(logString, file: file, function: function, line: line)
+        OWSLogger.verbose(message)
+    }
+
+    open class func debug(_ logString: String,
+                          file: String = #file,
+                          function: String = #function,
+                          line: Int = #line) {
+        let message = owsFormatLogMessage(logString, file: file, function: function, line: line)
+        OWSLogger.debug(message)
+    }
+
+    open class func info(_ logString: String,
+                         file: String = #file,
+                         function: String = #function,
+                         line: Int = #line) {
+        let message = owsFormatLogMessage(logString, file: file, function: function, line: line)
+        OWSLogger.info(message)
+    }
+
+    open class func warn(_ logString: String,
+                         file: String = #file,
+                         function: String = #function,
+                         line: Int = #line) {
+        let message = owsFormatLogMessage(logString, file: file, function: function, line: line)
+        OWSLogger.warn(message)
+    }
+
+    open class func error(_ logString: String,
+                          file: String = #file,
+                          function: String = #function,
+                          line: Int = #line) {
+        let message = owsFormatLogMessage(logString, file: file, function: function, line: line)
+        OWSLogger.error(message)
+    }
+
+    open class func flush() {
+        OWSLogger.flush()
+    }
+}