Add Todoist to the list of supported providers

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Userinfo.cs

@@ -74,6 +74,10 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                     // are based on GraphQL, which requires using POST:
                     ProviderTypes.Meetup or ProviderTypes.SubscribeStar => HttpMethod.Post,
 
+                    // The userinfo endpoints exposed by these providers
+                    // use custom protocols that require using POST:
+                    ProviderTypes.Todoist => HttpMethod.Post,
+
                     _ => request.Method
                 };
 
@@ -396,8 +400,8 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                     ProviderTypes.ExactOnline => new(context.Response["d"]?["results"]?[0]?.GetNamedParameters() ??
                         throw new InvalidOperationException(SR.FormatID0334("d/results/0"))),
 
-                    // Fitbit returns a nested "user" object.
-                    ProviderTypes.Fitbit => new(context.Response["user"]?.GetNamedParameters() ??
+                    // Fitbit and Todoist return a nested "user" object.
+                    ProviderTypes.Fitbit or ProviderTypes.Todoist => new(context.Response["user"]?.GetNamedParameters() ??
                         throw new InvalidOperationException(SR.FormatID0334("user"))),
 
                     // Harvest returns a nested "user" object and a collection of "accounts".

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs

@@ -962,6 +962,13 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                 context.UserinfoRequest["query"] = $"{{ user {{ {string.Join(", ", settings.UserFields)} }} }}";
             }
 
+            // Todoist requires sending "sync_token" and "resource_types" parameters.
+            else if (context.Registration.ProviderType is ProviderTypes.Todoist)
+            {
+                context.UserinfoRequest["sync_token"] = "*";
+                context.UserinfoRequest["resource_types"] = "[\"user\"]";
+            }
+
             // Trakt allows retrieving additional user details via the "extended" parameter.
             else if (context.Registration.ProviderType is ProviderTypes.Trakt)
             {
@@ -1194,7 +1201,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                 // requires a special capability to access this node, that may not be present:
                 ProviderTypes.Notion => (string?) context.UserinfoResponse?["bot"]?["owner"]?["user"]?["name"],
 
-                // Patreon doesn't return a username and require using the complete user name as the username:
+                // Patreon doesn't return a username and requires using the complete user name as the username:
                 ProviderTypes.Patreon => (string?) context.UserinfoResponse?["attributes"]?["full_name"],
 
                 // ServiceChannel returns the username as a custom "UserName" node:
@@ -1212,7 +1219,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                          context.UserinfoResponse?.HasParameter("lastName")  is true
                     => $"{(string?) context.UserinfoResponse?["firstName"]} {(string?) context.UserinfoResponse?["lastName"]}",
 
-                // These providers return return the username as a custom "display_name" node:
+                // These providers return the username as a custom "display_name" node:
                 ProviderTypes.Spotify or ProviderTypes.StackExchange or ProviderTypes.Zoom
                     => (string?) context.UserinfoResponse?["display_name"],
 
@@ -1222,6 +1229,9 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                 // Streamlabs returns the username as a custom "streamlabs/display_name" node:
                 ProviderTypes.Streamlabs => (string?) context.UserinfoResponse?["streamlabs"]?["display_name"],
 
+                // Todoist returns the username as a custom "full_name" node:
+                ProviderTypes.Todoist => (string?) context.UserinfoResponse?["full_name"],
+
                 // Trovo returns the username as a custom "userName" node:
                 ProviderTypes.Trovo => (string?) context.UserinfoResponse?["userName"],
 
@@ -1251,7 +1261,8 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                 ProviderTypes.Kroger        or ProviderTypes.Lichess    or ProviderTypes.Mastodon    or
                 ProviderTypes.Meetup        or ProviderTypes.Nextcloud  or ProviderTypes.Patreon     or
                 ProviderTypes.Reddit        or ProviderTypes.Smartsheet or ProviderTypes.Spotify     or
-                ProviderTypes.SubscribeStar or ProviderTypes.Twitter    or ProviderTypes.Zoom
+                ProviderTypes.SubscribeStar or ProviderTypes.Todoist    or ProviderTypes.Twitter     or
+                ProviderTypes.Zoom
                     => (string?) context.UserinfoResponse?["id"],
 
                 // Bitbucket returns the user identifier as a custom "uuid" node:
@@ -1478,8 +1489,8 @@ public static partial class OpenIddictClientWebIntegrationHandlers
             {
                 // The following providers are known to use comma-separated scopes instead of
                 // the standard format (that requires using a space as the scope separator):
-                ProviderTypes.Deezer  or ProviderTypes.Disqus or
-                ProviderTypes.Shopify or ProviderTypes.Strava
+                ProviderTypes.Deezer or ProviderTypes.Disqus or ProviderTypes.Shopify or
+                ProviderTypes.Strava or ProviderTypes.Todoist
                     => string.Join(",", context.Scopes),
 
                 // The following providers are known to use plus-separated scopes instead of

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml

@@ -1562,6 +1562,29 @@
     </Environment>
   </Provider>
 
+  <!--
+                                          ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
+                                          █▄▄ ▄▄██ ▄▄▄ ██ ▄▄▀██ ▄▄▄ █▄ ▄██ ▄▄▄ █▄▄ ▄▄██
+                                          ███ ████ ███ ██ ██ ██ ███ ██ ███▄▄▄▀▀███ ████
+                                          ███ ████ ▀▀▀ ██ ▀▀ ██ ▀▀▀ █▀ ▀██ ▀▀▀ ███ ████
+                                          ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
+  -->
+
+  <Provider Name="Todoist" Id="f1036d1d-63f1-41bc-9ec9-df26cd264837"
+            Documentation="https://developer.todoist.com/guides/#authorization">
+    <Environment Issuer="https://todoist.com/">
+      <Configuration AuthorizationEndpoint="https://todoist.com/oauth/authorize"
+                     TokenEndpoint="https://todoist.com/oauth/access_token"
+                     UserinfoEndpoint="https://api.todoist.com/sync/v9/sync" />
+
+      <!--
+        Note: Todoist requires sending the "data:read" scope to be able to use the userinfo endpoint.
+      -->
+
+      <Scope Name="data:read" Default="true" Required="true" />
+    </Environment>
+  </Provider>
+
   <!--
                                                 ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
                                                 █▄▄ ▄▄██ ▄▄▀█ ▄▄▀██ █▀▄█▄▄ ▄▄██