Add support for tags

Author: kean

WordPress/Classes/ViewRelated/Reader/ReaderDiscoverHeaderView.swift

@@ -138,12 +138,17 @@ enum ReaderDiscoverTag: Hashable {
     /// Latest post from your selected tags.
     case latest
 
+    /// A quick access for your tags.
+    case tag(ReaderTagTopic)
+
     var localizedTitle: String {
         switch self {
         case .recommended:
             NSLocalizedString("reader.discover.header.tag.recommended", value: "Recommended", comment: "Header view tag (filter)")
         case .latest:
             NSLocalizedString("reader.discover.header.tag.latest", value: "Latest", comment: "Header view tag (filter)")
+        case .tag(let tag):
+            tag.title.localizedCapitalized
         }
     }
 }

WordPress/Classes/ViewRelated/Reader/ReaderDiscoverViewController.swift

@@ -7,6 +7,9 @@ class ReaderDiscoverViewController: UIViewController, ReaderDiscoverHeaderViewDe
     private var selectedTag: ReaderDiscoverTag = .recommended
     private let topic: ReaderAbstractTopic
     private var streamVC: ReaderStreamViewController?
+    private var viewContext: NSManagedObjectContext {
+        ContextManager.shared.mainContext
+    }
 
     init(topic: ReaderAbstractTopic) {
         wpAssert(ReaderHelpers.topicIsDiscover(topic))
@@ -32,11 +35,21 @@ class ReaderDiscoverViewController: UIViewController, ReaderDiscoverHeaderViewDe
     }
 
     private func setupHeaderView() {
-        headerView.configure(tags: [.recommended, .latest])
+        let tags = fetchTags().map(ReaderDiscoverTag.tag)
+
+        headerView.configure(tags: [.recommended, .latest] + tags)
         headerView.setSelectedTag(selectedTag)
         headerView.delegate = self
     }
 
+    private func fetchTags() -> [ReaderTagTopic] {
+        viewContext.allObjects(
+            ofType: ReaderTagTopic.self,
+            matching: ReaderSidebarTagsSection.predicate,
+            sortedBy: [NSSortDescriptor(key: "title", ascending: true)]
+        )
+    }
+
     // MARK: - Selected Stream
 
     private func configureStream(for tag: ReaderDiscoverTag) {
@@ -49,6 +62,8 @@ class ReaderDiscoverViewController: UIViewController, ReaderDiscoverHeaderViewDe
             ReaderDiscoverStreamViewController(topic: topic)
         case .latest:
             ReaderDiscoverStreamViewController(topic: topic, sorting: .date)
+        case .tag(let tag):
+            ReaderStreamViewController.controllerWithTopic(tag)
         }
     }