Improve channel content type picker

Model/Channel.swift

@@ -4,7 +4,7 @@ import Foundation
 import SwiftyJSON
 
 struct Channel: Identifiable, Hashable {
-    enum ContentType: String, Identifiable {
+    enum ContentType: String, Identifiable, CaseIterable {
         case videos
         case playlists
         case livestreams
@@ -15,6 +15,15 @@ struct Channel: Identifiable, Hashable {
             rawValue
         }
 
+        var description: String {
+            switch self {
+            case .livestreams:
+                return "Live Streams".localized()
+            default:
+                return rawValue.capitalized.localized()
+            }
+        }
+
         var contentItemType: ContentItem.ContentType {
             switch self {
             case .videos:
@@ -29,6 +38,21 @@ struct Channel: Identifiable, Hashable {
                 return .channel
             }
         }
+
+        var systemImage: String {
+            switch self {
+            case .videos:
+                return "video"
+            case .playlists:
+                return "list.and.film"
+            case .livestreams:
+                return "dot.radiowaves.left.and.right"
+            case .shorts:
+                return "1.square"
+            case .channels:
+                return "person.3"
+            }
+        }
     }
 
     struct Tab: Identifiable, Hashable {
@@ -80,4 +104,9 @@ struct Channel: Identifiable, Hashable {
     var contentItem: ContentItem {
         ContentItem(channel: self)
     }
+
+    func hasData(for contentType: ContentType) -> Bool {
+        guard contentType != .videos, contentType != .playlists else { return true }
+        return tabs.contains(where: { $0.contentType == contentType })
+    }
 }