Migrate /unraid to Helix. (#4030)

Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/providers/twitch/api/Helix.cpp

@@ -1535,6 +1535,79 @@ void Helix::startRaid(
         .execute();
 }
 
+void Helix::cancelRaid(
+    QString broadcasterID, ResultCallback<> successCallback,
+    FailureCallback<HelixCancelRaidError, QString> failureCallback)
+{
+    using Error = HelixCancelRaidError;
+
+    QUrlQuery urlQuery;
+
+    urlQuery.addQueryItem("broadcaster_id", broadcasterID);
+
+    this->makeRequest("raids", urlQuery)
+        .type(NetworkRequestType::Delete)
+        .onSuccess([successCallback, failureCallback](auto result) -> Outcome {
+            if (result.status() != 204)
+            {
+                qCWarning(chatterinoTwitch)
+                    << "Success result for canceling the raid was"
+                    << result.status() << "but we only expected it to be 204";
+            }
+
+            successCallback();
+            return Success;
+        })
+        .onError([failureCallback](auto result) {
+            auto obj = result.parseJson();
+            auto message = obj.value("message").toString();
+
+            switch (result.status())
+            {
+                case 401: {
+                    if (message.startsWith("Missing scope",
+                                           Qt::CaseInsensitive))
+                    {
+                        failureCallback(Error::UserMissingScope, message);
+                    }
+                    else if (message.compare(
+                                 "The ID in broadcaster_id must match the user "
+                                 "ID "
+                                 "found in the request's OAuth token.",
+                                 Qt::CaseInsensitive) == 0)
+                    {
+                        // Must be the broadcaster.
+                        failureCallback(Error::UserNotAuthorized, message);
+                    }
+                    else
+                    {
+                        failureCallback(Error::Forwarded, message);
+                    }
+                }
+                break;
+
+                case 404: {
+                    failureCallback(Error::NoRaidPending, message);
+                }
+                break;
+
+                case 429: {
+                    failureCallback(Error::Ratelimited, message);
+                }
+                break;
+
+                default: {
+                    qCDebug(chatterinoTwitch)
+                        << "Unhandled error while canceling the raid:"
+                        << result.status() << result.getData() << obj;
+                    failureCallback(Error::Unknown, message);
+                }
+                break;
+            }
+        })
+        .execute();
+}  // cancelRaid
+
 void Helix::updateEmoteMode(
     QString broadcasterID, QString moderatorID, bool emoteMode,
     ResultCallback<HelixChatSettings> successCallback,