Add feed/group user activities

Reader/Info.plist

@@ -6,6 +6,8 @@
 	<array>
 		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.read-unread</string>
 		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.read-all</string>
+		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.read-feed</string>
+		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.read-group</string>
 		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.preferences</string>
 		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.add-account</string>
 		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.activate-account</string>

Reader/SceneDelegate.swift

@@ -122,6 +122,24 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
             split.selectHomeItem(.unread)
         case NSUserActivity.readAllType:
             split.selectHomeItem(.all)
+        case NSUserActivity.readFeedType:
+            guard let feedID = activity.feedID() else {
+                break
+            }
+            let req = Feed.fetchRequest()
+            req.predicate = NSPredicate(format: "id = %@", feedID)
+            if let feed = try? fervorController.persistentContainer.viewContext.fetch(req).first {
+                split.selectHomeItem(.feed(feed))
+            }
+        case NSUserActivity.readGroupType:
+            guard let groupID = activity.groupID() else {
+                break
+            }
+            let req = Group.fetchRequest()
+            req.predicate = NSPredicate(format: "id = %@", groupID)
+            if let group = try? fervorController.persistentContainer.viewContext.fetch(req).first {
+                split.selectHomeItem(.group(group))
+            }
         default:
             break
         }

Reader/Screens/Home/HomeViewController.swift

@@ -208,9 +208,9 @@ class HomeViewController: UIViewController {
         case .unread:
             vc.userActivity = .readUnread(account: fervorController.account!)
         case .group(let group):
-            break
+            vc.userActivity = .readGroup(group, account: fervorController.account!)
         case .feed(let feed):
-            break
+            vc.userActivity = .readFeed(feed, account: fervorController.account!)
         }
         return vc
     }

Reader/UserActivities.swift

@@ -14,6 +14,8 @@ extension NSUserActivity {
     static let activateAccountType = "net.shadowfacts.Reader.activity.activate-account"
     static let readUnreadType = "net.shadowfacts.Reader.activity.read-unread"
     static let readAllType = "net.shadowfacts.Reader.activity.read-all"
+    static let readFeedType = "net.shadowfacts.Reader.activity.read-feed"
+    static let readGroupType = "net.shadowfacts.Reader.activity.read-group"
     
     func accountID() -> Data? {
         let types = [
@@ -29,6 +31,22 @@ extension NSUserActivity {
         }
     }
     
+    func feedID() -> String? {
+        if activityType == NSUserActivity.readFeedType {
+            return userInfo?["feedID"] as? String
+        } else {
+            return nil
+        }
+    }
+    
+    func groupID() -> String? {
+        if activityType == NSUserActivity.readGroupType {
+            return userInfo?["groupID"] as? String
+        } else {
+            return nil
+        }
+    }
+
     static func preferences() -> NSUserActivity {
         return NSUserActivity(activityType: preferencesType)
     }
@@ -69,4 +87,30 @@ extension NSUserActivity {
         return activity
     }
     
+    static func readFeed(_ feed: Feed, account: LocalData.Account) -> NSUserActivity {
+        let activity = NSUserActivity(activityType: readFeedType)
+        activity.isEligibleForHandoff = true
+        activity.isEligibleForPrediction = true
+        activity.title = "Show articles from \(feed.title!)"
+        activity.userInfo = [
+            "accountID": account.id,
+            "feedID": feed.id!
+        ]
+        activity.targetContentIdentifier = account.id.base64EncodedString()
+        return activity
+    }
+    
+    static func readGroup(_ group: Group, account: LocalData.Account) -> NSUserActivity {
+        let activity = NSUserActivity(activityType: readGroupType)
+        activity.isEligibleForHandoff = true
+        activity.isEligibleForPrediction = true
+        activity.title = "Show articles from \(group.title)"
+        activity.userInfo = [
+            "accountID": account.id,
+            "groupID": group.id!
+        ]
+        activity.targetContentIdentifier = account.id.base64EncodedString()
+        return activity
+    }
+    
 }