Fix #203

Model/Applications/InvidiousAPI.swift

@@ -215,6 +215,10 @@ final class InvidiousAPI: Service, ObservableObject, VideosAPI {
         nil
     }
 
+    func channelByUsername(_: String) -> Resource? {
+        nil
+    }
+
     func channelVideos(_ id: String) -> Resource {
         resource(baseURL: account.url, path: basePathAppending("channels/\(id)/latest"))
     }

Model/Applications/PipedAPI.swift

@@ -44,6 +44,10 @@ final class PipedAPI: Service, ObservableObject, VideosAPI {
             self.extractChannel(from: content.json)
         }
 
+        configureTransformer(pathPattern("user/*")) { (content: Entity<JSON>) -> Channel? in
+            self.extractChannel(from: content.json)
+        }
+
         configureTransformer(pathPattern("playlists/*")) { (content: Entity<JSON>) -> ChannelPlaylist? in
             self.extractChannelPlaylist(from: content.json)
         }
@@ -133,6 +137,10 @@ final class PipedAPI: Service, ObservableObject, VideosAPI {
         resource(baseURL: account.url, path: "c/\(name)")
     }
 
+    func channelByUsername(_ username: String) -> Resource? {
+        resource(baseURL: account.url, path: "user/\(username)")
+    }
+
     func channelVideos(_ id: String) -> Resource {
         channel(id)
     }

Model/Applications/VideosAPI.swift

@@ -8,6 +8,7 @@ protocol VideosAPI {
 
     func channel(_ id: String) -> Resource
     func channelByName(_ name: String) -> Resource?
+    func channelByUsername(_ username: String) -> Resource?
     func channelVideos(_ id: String) -> Resource
     func trending(country: Country, category: TrendingCategory?) -> Resource
     func search(_ query: SearchQuery, page: String?) -> Resource

Shared Tests/URLParserTests.swift

@@ -16,6 +16,11 @@ final class URLParserTests: XCTestCase {
         "c/ABCDE": "ABCDE"
     ]
 
+    private static let users: [String: String] = [
+        "https://m.youtube.com/user/ARD": "ARD",
+        "m.youtube.com/user/ARD": "ARD"
+    ]
+
     private static let channelsByID: [String: String] = [
         "https://piped.kavin.rocks/channel/UCbcxFkd6B9xUU54InHv4Tig": "UCbcxFkd6B9xUU54InHv4Tig",
         "youtube.com/channel/UCbcxFkd6B9xUU54InHv4Tig": "UCbcxFkd6B9xUU54InHv4Tig",
@@ -68,6 +73,16 @@ final class URLParserTests: XCTestCase {
         }
     }
 
+    func testUsersParsing() throws {
+        Self.users.forEach { url, user in
+            let parser = URLParser(url: URL(string: url)!)
+            XCTAssertEqual(parser.destination, .channel)
+            XCTAssertNil(parser.channelID)
+            XCTAssertNil(parser.channelName)
+            XCTAssertEqual(parser.username, user)
+        }
+    }
+
     func testPlaylistsParsing() throws {
         Self.playlists.forEach { url, id in
             let parser = URLParser(url: URL(string: url)!)

Shared/OpenURLHandler.swift

@@ -180,6 +180,10 @@ struct OpenURLHandler {
             return accounts.api.channel(id)
         }
 
+        if let resource = resourceForUsernameUrl(parser) {
+            return resource
+        }
+
         guard let name = parser.channelName else {
             return nil
         }
@@ -195,6 +199,20 @@ struct OpenURLHandler {
         return nil
     }
 
+    private func resourceForUsernameUrl(_ parser: URLParser) -> Resource? {
+        guard let username = parser.username else { return nil }
+
+        if accounts.app.supportsOpeningChannelsByName {
+            return accounts.api.channelByUsername(username)
+        }
+
+        if let instance = InstancesModel.all.first(where: { $0.app.supportsOpeningChannelsByName }) {
+            return instance.anonymous.channelByUsername(username)
+        }
+
+        return nil
+    }
+
     private func handleSearchUrlOpen(_ parser: URLParser) {
         #if os(macOS)
             if alertIfNoMainWindowOpen() { return }

Shared/URLParser.swift

@@ -4,7 +4,7 @@ import Foundation
 struct URLParser {
     static let prefixes: [Destination: [String]] = [
         .playlist: ["/playlist", "playlist"],
-        .channel: ["/c", "c", "/channel", "channel"],
+        .channel: ["/c", "c", "/channel", "channel", "/user", "user"],
         .search: ["/results", "search"]
     ]
 
@@ -13,6 +13,21 @@ struct URLParser {
         case favorites, subscriptions, popular, trending
     }
 
+    var url: URL
+
+    init(url: URL) {
+        self.url = url
+        let urlString = url.absoluteString
+        let scheme = urlComponents?.scheme
+        if scheme == nil,
+           urlString.contains("youtube.com"),
+           let url = URL(string: "https://\(urlString)"
+           )
+        {
+            self.url = url
+        }
+    }
+
     var destination: Destination? {
         if hasAnyOfPrefixes(path, ["favorites"]) { return .favorites }
         if hasAnyOfPrefixes(path, ["subscriptions"]) { return .subscriptions }
@@ -34,8 +49,6 @@ struct URLParser {
         return .video
     }
 
-    var url: URL
-
     var videoID: String? {
         if host == "youtu.be", !path.isEmpty {
             return String(path.suffix(from: path.index(path.startIndex, offsetBy: 1)))
@@ -85,6 +98,12 @@ struct URLParser {
         return removePrefixes(path, Self.prefixes[.channel]!.map { [$0, "/"].joined() })
     }
 
+    var username: String? {
+        guard hasAnyOfPrefixes(path, ["user/", "/user/"]) else { return nil }
+
+        return removePrefixes(path, ["user/", "/user/"])
+    }
+
     private var host: String {
         urlComponents?.host ?? ""
     }