adds mac theme downloading

Mac/Scriptability/AppDelegate+Scriptability.swift

@@ -18,6 +18,7 @@
 
 import Foundation
 import Articles
+import Zip
 
 protocol AppDelegateAppleEvents {
     func installAppleEventHandlers()
@@ -44,6 +45,63 @@ extension AppDelegate : AppDelegateAppleEvents {
             return
         }
 
+		// Handle themes
+		if urlString.hasPrefix("netnewswire://theme") {
+			guard let comps = URLComponents(string: urlString),
+				  let queryItems = comps.queryItems,
+				  let themeURLString = queryItems.first(where: { $0.name == "url" })?.value else {
+					  return
+				  }
+			
+			if let themeURL = URL(string: themeURLString) {
+				let request = URLRequest(url: themeURL)
+				let task = URLSession.shared.downloadTask(with: request) { location, response, error in
+					var downloadDirectory = FileManager.default.urls(for: .downloadsDirectory, in: .userDomainMask).first!
+					try? FileManager.default.createDirectory(at: downloadDirectory, withIntermediateDirectories: true, attributes: nil)
+					let tmpFileName = UUID().uuidString + ".zip"
+					downloadDirectory.appendPathComponent("\(tmpFileName)")
+					
+					if location == nil {
+						return
+					}
+					
+					do {
+						try FileManager.default.moveItem(at: location!, to: downloadDirectory)
+					
+						var unzippedDir = downloadDirectory
+						unzippedDir = unzippedDir.deletingLastPathComponent()
+						unzippedDir.appendPathComponent("newtheme.nnwtheme")
+						
+						try Zip.unzipFile(downloadDirectory, destination: unzippedDir, overwrite: true, password: nil, progress: nil, fileOutputHandler: nil)
+						try FileManager.default.removeItem(at: downloadDirectory)
+						
+						let decoder = PropertyListDecoder()
+						let plistURL = URL(fileURLWithPath: unzippedDir.appendingPathComponent("Info.plist").path)
+						
+						let data = try Data(contentsOf: plistURL)
+						let plist = try decoder.decode(ArticleThemePlist.self, from: data)
+						
+						// rename
+						var renamedUnzippedDir = unzippedDir.deletingLastPathComponent()
+						renamedUnzippedDir.appendPathComponent(plist.name + ".nnwtheme")
+						if FileManager.default.fileExists(atPath: renamedUnzippedDir.path) {
+							try FileManager.default.removeItem(at: renamedUnzippedDir)
+						}
+						try FileManager.default.moveItem(at: unzippedDir, to: renamedUnzippedDir)
+						DispatchQueue.main.async {
+							self.importTheme(filename: renamedUnzippedDir.path)
+						}
+					} catch {
+						print(error)
+					}
+				}
+				task.resume()
+			}
+			return
+		
+		}
+		
+		
 		// Special case URL with specific scheme handler x-netnewswire-feed: intended to ensure we open
 		// it regardless of which news reader may be set as the default
 		let nnwScheme = "x-netnewswire-feed:"