Updated logging

Author: colemancda

Sources/JavaScriptKit/JS Types/JSBluetooth.swift

@@ -16,7 +16,7 @@ public final class JSBluetooth: JSType {
 
     // MARK: - Initialization
 
-    public init(_ jsObject: JSObjectRef) {
+    public init?(_ jsObject: JSObjectRef) {
         self.jsObject = jsObject
     }
 
@@ -42,7 +42,7 @@ public final class JSBluetooth: JSType {
         // .then(function(bluetoothDevice) { ... })
 
         guard let function = jsObject.requestDevice.function
-            else { fatalError("Invalid function \(jsObject.requestDevice)") }
+            else { fatalError("Invalid function \(#function)") }
 
         // FIXME: Improve, support all options
         let options = JSObject()
@@ -56,3 +56,8 @@ public final class JSBluetooth: JSType {
         return promise
     }
 }
+
+internal extension JSBluetooth {
+    
+    static let classObject = JSObjectRef.global.Bluetooth.function!
+}

Sources/JavaScriptKit/JS Types/JSBluetoothDevice.swift

@@ -14,7 +14,7 @@ public final class JSBluetoothDevice: JSType {
 
     // MARK: - Initialization
 
-    public init(_ jsObject: JSObjectRef) {
+    public init?(_ jsObject: JSObjectRef) {
         self.jsObject = jsObject
     }
 
@@ -24,7 +24,9 @@ public final class JSBluetoothDevice: JSType {
     public lazy var id: String = self.jsObject.get("id").string!
 
     /// A string that provices a human-readable name for the device.
-    public lazy var name: String? = self.jsObject.name.string
+    public var name: String? {
+        return self.jsObject.name.string
+    }
 
     /// Interface of the Web Bluetooth API represents a GATT Server on a remote device.
     public lazy var gatt = self.jsObject.gatt.object.flatMap({ JSBluetoothRemoteGATTServer($0) })!

Sources/JavaScriptKit/JS Types/JSBoolean.swift

@@ -23,6 +23,23 @@ public final class JSBoolean: JSType {
     }
 }
 
+// MARK: - RawRepresentable
+
+extension JSBoolean: RawRepresentable {
+        
+    public convenience init(rawValue: Bool) {
+        self.init(rawValue)
+    }
+    
+    public var rawValue: Bool {
+        guard let function = jsObject.valueOf.function
+            else { fatalError("Invalid function \(#function)") }
+        return function.apply(this: jsObject).boolean ?? false
+    }
+}
+
+// MARK: - Constants
+
 internal extension JSBoolean {
 
     static let classObject = JSObjectRef.global.Boolean.function!

Sources/JavaScriptKit/JS Types/JSConsole.swift

@@ -53,6 +53,13 @@ public final class JSConsole: JSType {
     public static func assert(_ condition: @autoclosure () -> (Bool), _ arguments: JSValueConvertible...) {
         assertFunction.dynamicallyCall(withArguments: [condition()] + arguments.map(print))
     }
+    
+    /**
+     The `console.assert()` method writes an error message to the console if the assertion is false. If the assertion is true, nothing happens.
+     */
+    public static func assert(_ condition: @autoclosure () -> (JSBoolean), _ arguments: JSValueConvertible...) {
+        assert(condition().rawValue, arguments)
+    }
 }
 
 internal extension JSConsole {

Sources/JavaScriptKit/Utilities.swift

@@ -0,0 +1,26 @@
+//
+//  Utilities.swift
+//  
+//
+//  Created by Alsey Coleman Miller on 6/4/20.
+//
+
+/// Unconditionally prints a given message and stops execution.
+internal func fatalError(_ message: @autoclosure () -> String = "", file: StaticString = #file, line: UInt = #line) -> Never {
+    let message = message()
+    JSConsole.error("Fatal error: \(message)")
+    Swift.fatalError(message, file: file, line: line)
+}
+
+/// Performs a traditional C-style assert with an optional message.
+internal func assert(_ condition: @autoclosure () -> Bool, _ message: @autoclosure () -> String = "", file: StaticString = #file, line: UInt = #line) {
+    let condition = condition()
+    let message = message()
+    JSConsole.assert(condition, "Assertion failure: \(message)")
+    Swift.assert(condition, message, file: file, line: line)
+}
+
+/// Performs a traditional C-style assert with an optional message.
+internal func assert(_ condition: @autoclosure () -> JSBoolean, _ message: @autoclosure () -> String = "", file: StaticString = #file, line: UInt = #line) {
+    assert(condition().rawValue, message(), file: file, line: line)
+}