Comments (fixes #4)

Model/CommentsModel.swift

@@ -0,0 +1,79 @@
+import Defaults
+import Foundation
+import SwiftyJSON
+
+final class CommentsModel: ObservableObject {
+    @Published var all = [Comment]()
+    @Published var replies = [Comment]()
+
+    @Published var nextPage: String?
+    @Published var firstPage = true
+
+    @Published var loaded = false
+
+    var accounts: AccountsModel!
+    var player: PlayerModel!
+
+    static var enabled: Bool {
+        !Defaults[.commentsInstanceID].isNil
+    }
+
+    var nextPageAvailable: Bool {
+        !(nextPage?.isEmpty ?? true)
+    }
+
+    func load(page: String? = nil) {
+        guard Self.enabled else {
+            return
+        }
+
+        loaded = false
+        clear()
+
+        guard let instance = InstancesModel.find(Defaults[.commentsInstanceID]),
+              !player.currentVideo.isNil
+        else {
+            return
+        }
+
+        firstPage = page.isNil || page!.isEmpty
+
+        PipedAPI(account: instance.anonymousAccount).comments(player.currentVideo!.videoID, page: page)?
+            .load()
+            .onSuccess { [weak self] response in
+                if let page: CommentsPage = response.typedContent() {
+                    self?.all = page.comments
+                    self?.nextPage = page.nextPage
+                }
+            }
+            .onCompletion { [weak self] _ in
+                self?.loaded = true
+            }
+    }
+
+    func loadNextPage() {
+        load(page: nextPage)
+    }
+
+    func loadReplies(page: String) {
+        guard !player.currentVideo.isNil else {
+            return
+        }
+
+        replies = []
+
+        accounts.api.comments(player.currentVideo!.videoID, page: page)?.load().onSuccess { response in
+            if let page: CommentsPage = response.typedContent() {
+                self.replies = page.comments
+            }
+        }
+    }
+
+    func clear() {
+        all = []
+        replies = []
+        firstPage = true
+        nextPage = nil
+        loaded = false
+    }
+}