Add Invidious comments support

Model/Applications/InvidiousAPI.swift

@@ -157,6 +157,15 @@ final class InvidiousAPI: Service, ObservableObject, VideosAPI {
         configureTransformer(pathPattern("videos/*"), requestMethods: [.get]) { (content: Entity<JSON>) -> Video in
             self.extractVideo(from: content.json)
         }
+
+        configureTransformer(pathPattern("comments/*")) { (content: Entity<JSON>) -> CommentsPage in
+            let details = content.json.dictionaryValue
+            let comments = details["comments"]?.arrayValue.compactMap { self.extractComment(from: $0) } ?? []
+            let nextPage = details["continuation"]?.string
+            let disabled = !details["error"].isNil
+
+            return CommentsPage(comments: comments, nextPage: nextPage, disabled: disabled)
+        }
     }
 
     private func pathPattern(_ path: String) -> String {
@@ -337,7 +346,12 @@ final class InvidiousAPI: Service, ObservableObject, VideosAPI {
             .withParam("q", query.lowercased())
     }
 
-    func comments(_: Video.ID, page _: String?) -> Resource? { nil }
+    func comments(_ id: Video.ID, page: String?) -> Resource? {
+        let resource = resource(baseURL: account.url, path: basePathAppending("comments/\(id)"))
+        guard let page = page else { return resource }
+
+        return resource.withParam("continuation", page)
+    }
 
     private func searchQuery(_ query: String) -> String {
         var searchQuery = query
@@ -533,4 +547,23 @@ final class InvidiousAPI: Service, ObservableObject, VideosAPI {
             videos: content["videos"].arrayValue.map { extractVideo(from: $0) }
         )
     }
+
+    private func extractComment(from content: JSON) -> Comment? {
+        let details = content.dictionaryValue
+        let author = details["author"]?.string ?? ""
+        let channelId = details["authorId"]?.string ?? UUID().uuidString
+        let authorAvatarURL = details["authorThumbnails"]?.arrayValue.last?.dictionaryValue["url"]?.string ?? ""
+        return Comment(
+            id: UUID().uuidString,
+            author: author,
+            authorAvatarURL: authorAvatarURL,
+            time: details["publishedText"]?.string ?? "",
+            pinned: false,
+            hearted: false,
+            likeCount: details["likeCount"]?.int ?? 0,
+            text: details["content"]?.string ?? "",
+            repliesPage: details["replies"]?.dictionaryValue["continuation"]?.string,
+            channel: Channel(id: channelId, name: author)
+        )
+    }
 }

Model/Applications/VideosApp.swift

@@ -51,10 +51,6 @@ enum VideosApp: String, CaseIterable {
         self == .piped
     }
 
-    var supportsComments: Bool {
-        self == .piped
-    }
-
     var searchUsesIndexedPages: Bool {
         self == .invidious
     }

Model/CommentsModel.swift

@@ -17,38 +17,16 @@ final class CommentsModel: ObservableObject {
 
     var player: PlayerModel!
 
-    static var instance: Instance? {
-        InstancesModel.find(Defaults[.commentsInstanceID])
+    var instance: Instance? {
+        player.accounts.current?.instance
     }
 
-    var api: VideosAPI? {
-        Self.instance.isNil ? nil : PipedAPI(account: Self.instance!.anonymousAccount)
-    }
-
-    static var enabled: Bool {
-        !instance.isNil
-    }
-
-    #if !os(tvOS)
-        static var placement: CommentsPlacement {
-            Defaults[.commentsPlacement]
-        }
-    #endif
-
     var nextPageAvailable: Bool {
         !(nextPage?.isEmpty ?? true)
     }
 
     func load(page: String? = nil) {
-        guard Self.enabled, !loaded else {
-            return
-        }
-
-        guard !Self.instance.isNil,
-              let video = player.currentVideo
-        else {
-            return
-        }
+        guard let video = player.currentVideo else { return }
 
         if !firstPage && !nextPageAvailable {
             return
@@ -56,7 +34,7 @@ final class CommentsModel: ObservableObject {
 
         firstPage = page.isNil || page!.isEmpty
 
-        api?.comments(video.videoID, page: page)?
+        player.accounts.api.comments(video.videoID, page: page)?
             .load()
             .onSuccess { [weak self] response in
                 if let page: CommentsPage = response.typedContent() {
@@ -65,6 +43,9 @@ final class CommentsModel: ObservableObject {
                     self?.disabled = page.disabled
                 }
             }
+            .onFailure { [weak self] requestError in
+                self?.disabled = !requestError.json.dictionaryValue["error"].isNil
+            }
             .onCompletion { [weak self] _ in
                 self?.loaded = true
             }
@@ -94,7 +75,7 @@ final class CommentsModel: ObservableObject {
         repliesPageID = page
         repliesLoaded = false
 
-        api?.comments(player.currentVideo!.videoID, page: page)?
+        player.accounts.api.comments(player.currentVideo!.videoID, page: page)?
             .load()
             .onSuccess { [weak self] response in
                 if let page: CommentsPage = response.typedContent() {