Open video chat links in the videochat form (#169)

The link parser only knew the voicechat key, so videochat links, which
the API now exports for group video chats (including Copy Invite Link
on macOS), opened the group without joining the chat. A livestream key
with a value was ignored as well.

Treat videochat and livestream like voicechat in t.me and tg://resolve
links, with and without a value, like iOS, and cover them in
LinkParsingTests.

Author: null00x

packages/TelegramLinks/Sources/TelegramLinks/LinkParsing.swift

@@ -57,6 +57,7 @@ private let keyURLSet = "set";
 private let keyURLText = "text";
 private let keyURLStart = "start";
 private let keyURLVoiceChat = "voicechat";
+private let keyURLVideoChat = "videochat";
 private let keyURLStartattach = "startattach";
 private let keyURLAttach = "attach";
 private let keyURLStartGroup = "startgroup";
@@ -455,7 +456,7 @@ public func parseInAppLink(_ url: NSString, options: InAppLinkParsingOptions = I
                                 return .inviteBotToGroup(link: urlString, username: username, action: .start(parameter: value, behavior: .automatic), rights: rights, isChannel: key == keyURLStartChannel)
                             }
                             break loop;
-                        case keyURLVoiceChat:
+                        case keyURLVoiceChat, keyURLVideoChat, keyURLLivestream:
                             action = .joinVoiceChat(value)
                             break loop;
                         case keyURLAttach:
@@ -471,7 +472,7 @@ public func parseInAppLink(_ url: NSString, options: InAppLinkParsingOptions = I
                             break
                         }
                     }
-                    if vars.isEmpty && userAndVariables[1] == keyURLVoiceChat {
+                    if vars.isEmpty && [keyURLVoiceChat, keyURLVideoChat, keyURLLivestream].contains(userAndVariables[1]) {
                         action = .joinVoiceChat(nil)
                     }
                 }
@@ -735,7 +736,7 @@ public func parseInAppLink(_ url: NSString, options: InAppLinkParsingOptions = I
                                     let rights = vars[keyURLAdmin]
                                     return .inviteBotToGroup(link: urlString, username: username, action: .start(parameter: value, behavior: .none), rights: rights, isChannel: key == keyURLStartChannel)
                                 }
-                            case keyURLVoiceChat:
+                            case keyURLVoiceChat, keyURLVideoChat, keyURLLivestream:
                                 action = .joinVoiceChat(value)
                                 break loop
                             case keyURLAttach:
@@ -771,7 +772,7 @@ public func parseInAppLink(_ url: NSString, options: InAppLinkParsingOptions = I
                         }
                         if action == nil && emptyVars.contains(keyURLStartapp) {
                             action = .makeWebview(appname: "", command: nil)
-                        } else if action == nil && emptyVars.contains(keyURLVoiceChat) {
+                        } else if action == nil && (emptyVars.contains(keyURLVoiceChat) || emptyVars.contains(keyURLVideoChat) || emptyVars.contains(keyURLLivestream)) {
                             action = .joinVoiceChat(nil)
                         } else if action == nil, vars[keyURLStartattach] != nil || vars[keyURLAttach] != nil {
                             let choose = vars[keyURLChoose]?.split(separator: "+").compactMap { String($0) }

packages/TelegramLinks/Tests/TelegramLinksTests/LinkParsingTests.swift

@@ -147,6 +147,12 @@ final class LinkParsingTests: XCTestCase {
         assertPeer("tg://resolve?domain=alice&text=hello%20world", username: "alice", action: .inputText(text: "hello world", behavior: .automatic))
         assertPeer("tg://resolve?domain=alice&voicechat", username: "alice", action: .joinVoiceChat(nil))
         assertPeer("tg://resolve?domain=alice&voicechat=abc", username: "alice", action: .joinVoiceChat("abc"))
+        assertPeer("tg://resolve?domain=alice&videochat", username: "alice", action: .joinVoiceChat(nil))
+        assertPeer("tg://resolve?domain=alice&videochat=abc", username: "alice", action: .joinVoiceChat("abc"))
+        assertPeer("tg://resolve?domain=alice&livestream=abc", username: "alice", action: .joinVoiceChat("abc"))
+        assertPeer("https://t.me/alice?videochat", username: "alice", action: .joinVoiceChat(nil))
+        assertPeer("https://t.me/alice?videochat=abc", username: "alice", action: .joinVoiceChat("abc"))
+        assertPeer("https://t.me/alice?voicechat", username: "alice", action: .joinVoiceChat(nil))
         assertPeer("tg://resolve?domain=alice&startapp", username: "alice", action: .makeWebview(appname: "", command: nil))
         assertPeer("tg://resolve?domain=alice&attach=bot&choose=users+groups", username: "alice", action: .attachBot("bot", nil, ["bot"]))
         assertPeer("tg://resolve?domain=alice&direct", username: "alice", action: .direct)