Make further progress on sending to MarsEdit and Micro.blog.

Commands/SendToCommand.swift

@@ -8,10 +8,12 @@
 
 import Cocoa
 
+// Unlike UndoableCommand commands, you instantiate one of each of these and reuse them.
+
 protocol SendToCommand {
 
-	func canSendObject(_ object: Any?) -> Bool
+	func canSendObject(_ object: Any?, selectedText: String?) -> Bool
-	func sendObject(_ object: Any?)
+	func sendObject(_ object: Any?, selectedText: String?)
 }
 
 extension SendToCommand {

Commands/SendToMarsEditCommand.swift

@@ -10,12 +10,12 @@ import Foundation
 
 final class SendToMarsEditCommand: SendToCommand {
 
-	func canSendObject(_ object: Any?) -> Bool {
+	func canSendObject(_ object: Any?, selectedText: String?) -> Bool {
 
 		return false
 	}
 
-	func sendObject(_ object: Any?) {
+	func sendObject(_ object: Any?, selectedText: String?) {
 
 	}
 }

Commands/SendToMicroBlogCommand.swift

@@ -7,6 +7,7 @@
 //
 
 import Cocoa
+import Data
 
 // Not undoable.
 
@@ -21,16 +22,53 @@ final class SendToMicroBlogCommand: SendToCommand {
 		NotificationCenter.default.addObserver(self, selector: #selector(appDidBecomeActive(_:)), name: NSApplication.didBecomeActiveNotification, object: nil)
 	}
 
-	func canSendObject(_ object: Any?) -> Bool {
+	func canSendObject(_ object: Any?, selectedText: String?) -> Bool {
 
-		if !appExists {
+		guard appExists else {
 			return false
 		}
+		guard let article = object as? Article else {
+			return false
+		}
+		guard let _ = article.preferredLink else {
 			return false
 		}
 
-	func sendObject(_ object: Any?) {
+		return true
+	}
 	
+	func sendObject(_ object: Any?, selectedText: String?) {
+
+		guard canSendObject(object, selectedText: selectedText) else {
+			return
+		}
+		guard let article = object as? Article else {
+			return
+		}
+
+		// TODO: get text from contentHTML or contentText if no title and no selectedText.
+		var s = ""
+		if let selectedText = selectedText {
+			s += selectedText
+			if let link = article.preferredLink {
+				s += "\n\n\(link)"
+			}
+		}
+		else if let title = article.title {
+			s += title
+			if let link = article.preferredLink {
+				s = "[" + s + "](" + link + ")"
+			}
+		}
+
+		guard let encodedString = s.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) else {
+			return
+		}
+		guard let url = URL(string: "microblog://post?text=" + encodedString) else {
+			return
+		}
+
+		let _ = try? NSWorkspace.shared.open(url, options: [], configuration: [:])
 	}
 
 	@objc func appDidBecomeActive(_ note: Notification) {