From 8df8dfdb752b5e1018e9d313106e3bcc602a40c6 Mon Sep 17 00:00:00 2001
From: Maurice Parker <mo@vincode.io>
Date: Sun, 19 Jan 2020 16:44:13 -0700
Subject: [PATCH] Update the Feeds list when a Feed's unread count gets above
 zero and the read filter is on.  Issue #1550

---
 iOS/SceneCoordinator.swift | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/iOS/SceneCoordinator.swift b/iOS/SceneCoordinator.swift
index 0ef3d0e61..00f936ebe 100644
--- a/iOS/SceneCoordinator.swift
+++ b/iOS/SceneCoordinator.swift
@@ -290,6 +290,7 @@ class SceneCoordinator: NSObject, UndoableCommandRunner, UnreadCountProvider {
 		}
 		
 		NotificationCenter.default.addObserver(self, selector: #selector(unreadCountDidInitialize(_:)), name: .UnreadCountDidInitialize, object: nil)
+		NotificationCenter.default.addObserver(self, selector: #selector(unreadCountDidChange(_:)), name: .UnreadCountDidChange, object: nil)
 		NotificationCenter.default.addObserver(self, selector: #selector(statusesDidChange(_:)), name: .StatusesDidChange, object: nil)
 		NotificationCenter.default.addObserver(self, selector: #selector(containerChildrenDidChange(_:)), name: .ChildrenDidChange, object: nil)
 		NotificationCenter.default.addObserver(self, selector: #selector(batchUpdateDidPerform(_:)), name: .BatchUpdateDidPerform, object: nil)
@@ -429,6 +430,24 @@ class SceneCoordinator: NSObject, UndoableCommandRunner, UnreadCountProvider {
 		treeControllerDelegate.resetFilterExceptions()
 	}
 
+	@objc func unreadCountDidChange(_ note: Notification) {
+		// If we are filtering reads, the new unread count is greater than 1, and the feed isn't shown then continue
+		guard let feed = note.object as? Feed, isReadFeedsFiltered, feed.unreadCount > 0, !shadowTableContains(feed) else {
+			return
+		}
+
+		for section in shadowTable {
+			for node in section {
+				if let feed = node.representedObject as? Feed, let feedID = feed.feedID {
+					treeControllerDelegate.addFilterException(feedID)
+				}
+			}
+		}
+		
+		rebuildBackingStores()
+		treeControllerDelegate.resetFilterExceptions()
+	}
+
 	@objc func statusesDidChange(_ note: Notification) {
 		updateUnreadCount()
 	}
@@ -1211,6 +1230,17 @@ private extension SceneCoordinator {
 			
 		}
 	}
+	
+	func shadowTableContains(_ feed: Feed) -> Bool {
+		for section in shadowTable {
+			for node in section {
+				if let nodeFeed = node.representedObject as? Feed, nodeFeed.feedID == feed.feedID {
+					return true
+				}
+			}
+		}
+		return false
+	}
 
 	func nodeFor(_ indexPath: IndexPath) -> Node? {
 		guard indexPath.section < shadowTable.count && indexPath.row < shadowTable[indexPath.section].count else {