Add silent x-callback-url actions

User confirmation is required the first time a source app attempts to
run an action silently. Rejecting will always display the UI for the
given action (as if the silent parameter had been false).

Tusker.xcodeproj/project.pbxproj

@@ -95,6 +95,7 @@
 		D6757A7C2157E01900721E32 /* XCBManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6757A7B2157E01900721E32 /* XCBManager.swift */; };
 		D6757A7E2157E02600721E32 /* XCallbackURL.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6757A7D2157E02600721E32 /* XCallbackURL.swift */; };
 		D6757A822157E8FA00721E32 /* XCBSession.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6757A812157E8FA00721E32 /* XCBSession.swift */; };
+		D679C09F215850EF00DA27FE /* XCBActions.swift in Sources */ = {isa = PBXBuildFile; fileRef = D679C09E215850EF00DA27FE /* XCBActions.swift */; };
 		D6BED170212663DA00F02DA0 /* SwiftSoup.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = D6BED16E212663DA00F02DA0 /* SwiftSoup.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		D6BED174212667E900F02DA0 /* StatusTableViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6BED173212667E900F02DA0 /* StatusTableViewCell.swift */; };
 		D6C94D852139DFD800CB5196 /* LargeImage.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = D6C94D842139DFD800CB5196 /* LargeImage.storyboard */; };
@@ -253,6 +254,7 @@
 		D6757A7B2157E01900721E32 /* XCBManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = XCBManager.swift; sourceTree = "<group>"; };
 		D6757A7D2157E02600721E32 /* XCallbackURL.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = XCallbackURL.swift; sourceTree = "<group>"; };
 		D6757A812157E8FA00721E32 /* XCBSession.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = XCBSession.swift; sourceTree = "<group>"; };
+		D679C09E215850EF00DA27FE /* XCBActions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = XCBActions.swift; sourceTree = "<group>"; };
 		D6BED16E212663DA00F02DA0 /* SwiftSoup.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = SwiftSoup.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		D6BED173212667E900F02DA0 /* StatusTableViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StatusTableViewCell.swift; sourceTree = "<group>"; };
 		D6C94D842139DFD800CB5196 /* LargeImage.storyboard */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; path = LargeImage.storyboard; sourceTree = "<group>"; };
@@ -578,6 +580,7 @@
 				D6757A7B2157E01900721E32 /* XCBManager.swift */,
 				D6757A812157E8FA00721E32 /* XCBSession.swift */,
 				D6757A7D2157E02600721E32 /* XCallbackURL.swift */,
+				D679C09E215850EF00DA27FE /* XCBActions.swift */,
 			);
 			path = XCallbackURL;
 			sourceTree = "<group>";
@@ -951,6 +954,7 @@
 				D6333B772138D94E00CE884A /* ComposeMediaView.swift in Sources */,
 				04ED00B121481ED800567C53 /* SteppedProgressView.swift in Sources */,
 				D663626421360D2300C9CBA2 /* AvatarStyle.swift in Sources */,
+				D679C09F215850EF00DA27FE /* XCBActions.swift in Sources */,
 				D6538945214D6D7500E3CEFC /* TableViewSwipeActionProvider.swift in Sources */,
 				D6BED174212667E900F02DA0 /* StatusTableViewCell.swift in Sources */,
 				D64D0AAD2128D88B005A6F37 /* LocalData.swift in Sources */,

Tusker/Preferences/Preferences.swift

@@ -39,4 +39,12 @@ class Preferences: Codable {
     
     var defaultPostVisibility = Status.Visibility.public
     
+    var silentActions: [String: Permission] = [:]
+    
+}
+
+extension Preferences {
+    enum Permission: String, Codable {
+        case undecided, accepted, rejected
+    }
 }

Tusker/Screens/Compose/ComposeViewController.swift

@@ -254,7 +254,7 @@ class ComposeViewController: UIViewController {
                     self.performSegue(withIdentifier: "postComplete", sender: self)
                     
                     self.xcbSession?.complete(with: .success, additionalData: [
-                        "statusURL": status.url!.absoluteString,
+                        "statusURL": status.url?.absoluteString,
                         "statusURI": status.uri
                         ])
                 }

Tusker/XCallbackURL/XCBActions.swift

@@ -0,0 +1,73 @@
+//
+//  XCBActions.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 9/23/18.
+//  Copyright © 2018 Shadowfacts. All rights reserved.
+//
+
+import UIKit
+
+struct XCBActions {
+    // MARK: - Posts
+    
+    static func postStatus(_ url: XCallbackURL) -> Bool {
+        let session = XCBManager.createSession(type: .postStatus, url: url)
+        
+        let mentioning = url.arguments["mentioning"]
+        let text = url.arguments["text"]
+        
+        func postStatusSilently() {
+            var status = ""
+            if let mentioning = mentioning { status += mentioning }
+            if let text = text { status += text }
+            let request = MastodonController.shared.client.createStatus(text: status)
+            MastodonController.shared.client.run(request) { response in
+                if case let .success(status, _) = response {
+                    session.complete(with: .success, additionalData: [
+                        "statusURL": status.url?.absoluteString,
+                        "statusURI": status.uri
+                        ])
+                } else if case let .failure(error) = response {
+                    session.complete(with: .error, additionalData: [
+                        "error": error.localizedDescription
+                        ])
+                }
+            }
+        }
+        
+        func showComposeStatus() {
+            let vc = ComposeViewController.create(for: session, mentioning: mentioning, text: text)
+            UIApplication.shared.keyWindow!.rootViewController!.present(vc, animated: true)
+        }
+        
+        let silent = Bool(url.arguments["silent"] ?? "false") ?? false
+        if silent {
+            if let source = url.source {
+                let permission = Preferences.shared.silentActions[source] ?? .undecided
+                switch permission {
+                case .accepted:
+                    postStatusSilently()
+                case .rejected:
+                    showComposeStatus()
+                case .undecided:
+                    let alert = UIAlertController(title: "\(source) wants to perform actions silently", message: "Accepting will allow \(source) to perform actions without your confirmation, rejecting will always prompt for confirmation.", preferredStyle: .alert)
+                    alert.addAction(UIAlertAction(title: "Accept", style: .default, handler: { (_) in
+                        Preferences.shared.silentActions[source] = .accepted
+                        postStatusSilently()
+                    }))
+                    alert.addAction(UIAlertAction(title: "Reject", style: .default, handler: { (_) in
+                        Preferences.shared.silentActions[source] = .rejected
+                        showComposeStatus()
+                    }))
+                    UIApplication.shared.keyWindow!.rootViewController!.present(alert, animated: true)
+                }
+            } else {
+                session.complete(with: .error, additionalData: ["error": "Cannot perform silent action without source app, x-source parameter must be specified"])
+            }
+        } else {
+            showComposeStatus()
+        }
+        return true
+    }
+}

Tusker/XCallbackURL/XCBManager.swift

@@ -11,7 +11,7 @@ import UIKit
 class XCBManager {
     
     static var specs: [XCallbackURLSpec] = [
-        XCallbackURLSpec(path: "/postStatus", arguments: ["mentioning": true, "text": true], handle: postStatus)
+        XCallbackURLSpec(path: "/postStatus", arguments: ["mentioning": true, "text": true, "silent": true], handle: XCBActions.postStatus)
     ]
     
     static var currentSession: XCBSession?
@@ -25,30 +25,10 @@ class XCBManager {
         return false
     }
     
-    static func didComplete(session type: XCBSessionType, result: XCBSessionResult) {
+    static func createSession(type: XCBSessionType, url: XCallbackURL) -> XCBSession {
-        if let currentSession = currentSession,
-            currentSession.type == type {
-            currentSession.complete(with: result)
-            self.currentSession = nil
-        }
-    }
-    
-    private static func createSession(type: XCBSessionType, url: XCallbackURL) -> XCBSession {
         let session = XCBSession(type: type, success: url.success, error: url.error, cancel: url.cancel)
         currentSession = session
         return session
     }
     
-    static func postStatus(_ url: XCallbackURL) -> Bool {
-        let mentioning = url.arguments["mentioning"]
-        let text = url.arguments["text"]
-        if let window = UIApplication.shared.keyWindow {
-            let session = createSession(type: .postStatus, url: url)
-            let vc = ComposeViewController.create(for: session, mentioning: mentioning, text: text)
-            window.rootViewController?.present(vc, animated: true)
-            return true
-        }
-        return false
-    }
-    
 }

Tusker/XCallbackURL/XCBSession.swift

@@ -24,13 +24,16 @@ class XCBSession {
     func complete(with result: XCBSessionResult, additionalData: [String: String?]? = nil) {
         let url = result == .success ? success : result == .error ? error : cancel
         if var url = url {
+            XCBManager.currentSession = nil
             if let additionalData = additionalData {
                 var components = URLComponents(url: url, resolvingAgainstBaseURL: true)!
                 components.queryItems = components.queryItems ?? []
                 components.queryItems!.append(contentsOf: additionalData.map(URLQueryItem.init))
                 url = components.url!
             }
-            UIApplication.shared.open(url, options: [:])
+            DispatchQueue.main.async {
+                UIApplication.shared.open(url, options: [:])
+            }
         }
     }
 }

Tusker/XCallbackURL/XCallbackURL.swift

@@ -25,6 +25,7 @@ struct XCallbackURLSpec {
 struct XCallbackURL {
     let path: String
     let arguments: [String: String]
+    let source: String?
     let success: URL?
     let error: URL?
     let cancel: URL?
@@ -37,6 +38,7 @@ struct XCallbackURL {
                 result[el.key] = value
             }
         })
+        source = queryItems.first(where: { $0.name == "x-source" }).flatMap { $0.value }
         success = queryItems.first(where: { $0.name == "x-success" }).flatMap { $0.value }.flatMap { URL(string: $0) }
         error = queryItems.first(where: { $0.name == "x-error" }).flatMap { $0.value }.flatMap { URL(string: $0) }
         cancel = queryItems.first(where: { $0.name == "x-cancel" }).flatMap { $0.value }.flatMap { URL(string: $0) }