removing unneeded code, cleanup some todo items (#1)

Sources/XcodeProject/Archiving/PBXPListArchiver.swift

@@ -9,7 +9,7 @@
 import Foundation
 
 public protocol StreamWritable: class {
-	func write(_ string: String)
+	func write(_ string: String) throws
 }
 
 public class ConsoleStreamWriter: StreamWritable {
@@ -80,41 +80,17 @@ struct Format {
 	var indentation: Indentation = Indentation()
 }
 
-struct PBXObjectType: Hashable, CustomStringConvertible {
-	let type: PBXObject.Type
-
-	init(type: PBXObject.Type) {
-		self.type = type
-	}
-
-	static func ==(lhs: PBXObjectType, rhs: PBXObjectType) -> Bool {
-		return lhs.type == rhs.type
-	}
-
-	var hashValue: Int {
-		return String(describing: type).hashValue
-	}
-
-	var description: String {
-		return String(describing: type)
-	}
-}
-
 struct ObjectMap {
-	let objectMap: [PBXObjectType: [PBXObject]]
+	let objectMap: [String: [PBXObject]]
 
 	init(project: PBXProject) {
-		var buckets: [PBXObjectType: [PBXObject]] = [:]
+		var buckets: [String: [PBXObject]] = [:]
 
 		let visitor = ObjectVisitor()
 		visitor.visit(object: project)
 
-		visitor.types.forEach {
-			buckets[$0] = []
-		}
-
 		visitor.allObjects.forEach { object in
-			buckets[PBXObjectType(type: type(of: object))]!.append(object)
+			buckets[String(describing: type(of: object)), default: []].append(object)
 		}
 
 		self.objectMap = buckets
@@ -134,23 +110,23 @@ public final class PBXPListArchiver {
 		archiveDictionary[ProjectFile.RootKey.rootObject] = projectFile.project.plistID
 	}
 
-	public func write(stream: StreamWritable) {
+	public func write(stream: StreamWritable) throws {
 		var format = Format()
 
-		stream.write("// !$*UTF8*$!\(format.endOfLine)")
-		stream.write("{\(format.endOfLine)")
+		try stream.write("// !$*UTF8*$!\(format.endOfLine)")
+		try stream.write("{\(format.endOfLine)")
 		format.indentation.increase()
-		archiveDictionary.sorted { (obj1, obj2) in
+		try archiveDictionary.sorted { (obj1, obj2) in
 			return obj1.key < obj2.key
 		}.forEach { (key, value) in
 			guard let value = value else { return }
-			stream.write("\(format.indentation)\(key) = ")
-			stream.write(value.plistRepresentation(format: format))
-			stream.write(";\(format.endOfLine)")
+			try stream.write("\(format.indentation)\(key) = ")
+			try stream.write(value.plistRepresentation(format: format))
+			try stream.write(";\(format.endOfLine)")
 		}
 		format.indentation.decrease()
 
-		stream.write("}\(format.endOfLine)")
+		try stream.write("}\(format.endOfLine)")
 	}
 }
 
@@ -168,21 +144,13 @@ final class ObjectVisitor {
 		object.visit(self)
 	}
 
-	var types: [PBXObjectType] {
-		return Array(Set(objectMap.map { PBXObjectType(type: type(of: $0.value)) }))
-	}
-
 	var allObjects: [PBXObject] {
 		return objects()
 	}
 
 	func objects<T: PBXObject>() -> [T] {
 		return objectMap.flatMap { return $0.value as? T }
 	}
-
-	var keys: Set<PBXObject.ID> {
-		return Set(objectMap.keys)
-	}
 }
 
 extension PBXObject {

Sources/XcodeProject/Archiving/PListArchivable.swift

@@ -24,15 +24,15 @@ extension ObjectMap: PListArchivable {
 		func plist(objects: [PBXObject], format: Format) -> String {
 			var str = ""
 			objects.sorted { (obj1, obj2) -> Bool in
-				obj1.globalID.rawValue < obj2.globalID.rawValue
+				obj1.globalID < obj2.globalID
 			}.forEach {
 				str += $0.plistRepresentation(format: format)
 			}
 			return str
 		}
 		var str = "{\n"
 		objectMap.sorted { (obj1, obj2) -> Bool in
-			return obj1.key.description < obj2.key.description
+			return obj1.key < obj2.key
 		}.forEach { (key, value) in
 			str += "\n/* Begin \(key) section */\n"
 			var format = format

Sources/XcodeProject/Objects+Extensions/PBXGroup+FolderSync.swift

@@ -11,7 +11,7 @@ import Foundation
 public extension PBXGroup {
 	@discardableResult
 	func add(file: URL, createGroupsRecursively: Bool = true) -> PBXFileReference? {
-		guard let url = url else { return nil } // TODO: return an absolute reference? or maybe a project one?
+		guard let url = url else { return nil }
 		var matchingComponentsCount = 0
 		var filePathComponents = file.pathComponents
 		for components in zip(url.pathComponents, filePathComponents) {

Sources/XcodeProject/Objects+Extensions/PBXProject+Helpers.swift

@@ -8,7 +8,11 @@
 
 public extension PBXProject {
 	func generateGlobalId() -> PBXObject.ID {
-		return PBXObject.ID() // TODO: PBXProject should keep track of its already used ID's and prevent duplicates
+		var objectId = PBXObject.ID()
+		while objects[objectId] != nil {
+			objectId = PBXObject.ID()
+		}
+		return objectId
 	}
 }
 public extension PBXProject {

Sources/XcodeProject/Objects+Extensions/PBXReference+Extensions.swift

@@ -12,7 +12,7 @@ public extension PBXReference {
 	var url: URL? {
 		guard let sourceTree = sourceTree else { return nil }
 		guard let project = parentProject else { return nil }
-		let filePath = path ?? "" // TODO: this is probably not quite right
+		let filePath = path ?? ""
 		switch sourceTree {
 		case .absolute:
 			return URL(fileURLWithPath: filePath)

Sources/XcodeProject/Objects/PBXObject+ID.swift

@@ -124,6 +124,12 @@ extension PBXObject.ID: Hashable {
 	}
 }
 
+extension PBXObject.ID: Comparable {
+	public static func <(lhs: PBXObject.ID, rhs: PBXObject.ID) -> Bool {
+		return lhs.rawValue < rhs.rawValue
+	}
+}
+
 extension PropertyList {
 	var globalID: PBXObject.ID? {
 		return PBXObject.ID(rawValue: self.string)

Sources/XcodeProject/ProjectFile.swift

@@ -81,14 +81,14 @@ public final class ProjectFile {
 		}
 	}
 
-	public func currentFileWrapper() -> FileWrapper {
+	public func currentFileWrapper() throws -> FileWrapper {
 		let currentFileWrapper = fileWrapper
 
 		let oldPbxproj = currentFileWrapper.fileWrappers!["project.pbxproj"]!
 
 		let dataStream = DataStreamWriter()
 		let archiver = PBXPListArchiver(projectFile: self)
-		archiver.write(stream: dataStream)
+		try archiver.write(stream: dataStream)
 		let newPbxproj = FileWrapper(regularFileWithContents: dataStream.data)
 		newPbxproj.preferredFilename = "project.pbxproj"
 
@@ -113,7 +113,7 @@ extension ProjectFile {
 
 		let dataStream = DataStreamWriter()
 		let archiver = PBXPListArchiver(projectFile: self)
-		archiver.write(stream: dataStream)
+		try archiver.write(stream: dataStream)
 		let newPbxproj = FileWrapper(regularFileWithContents: dataStream.data)
 		newPbxproj.preferredFilename = "project.pbxproj"