Use enum to represent activity parameters during the signing process

docs/openapi.yaml

@@ -168,11 +168,10 @@ paths:
               schema:
                 type: object
                 properties:
-                  internal_activity_id:
-                    description: Internal activity ID.
-                    type: string
-                    format: uuid
-                  activity:
+                  params:
+                    description: Activity parameters
+                    $ref: '#/components/schemas/ActivityParameters'
+                  message:
                     description: Canonical representation of activity.
                     type: string
                     example: '{"type":"Update"}'
@@ -184,10 +183,9 @@ paths:
             schema:
               type: object
               properties:
-                internal_activity_id:
-                  description: Internal activity ID.
-                  type: string
-                  format: uuid
+                params:
+                  description: Activity parameters
+                  $ref: '#/components/schemas/ActivityParameters'
                 signer:
                   description: Signer's identifier (DID)
                   type: string
@@ -1178,6 +1176,14 @@ components:
                 note:
                   description: Profile bio.
                   type: string
+    ActivityParameters:
+      type: object
+      properties:
+        type:
+          description: Activity type
+          type: string
+          enum:
+            - update
     Attachment:
       type: object
       properties:

src/mastodon_api/accounts/types.rs

@@ -262,15 +262,21 @@ impl AccountUpdateData {
     }
 }
 
+#[derive(Serialize, Deserialize)]
+#[serde(tag = "type", rename_all = "kebab-case")]
+pub enum ActivityParams {
+    Update { internal_activity_id: Uuid },
+}
+
 #[derive(Serialize)]
-pub struct UnsignedUpdate {
-    pub internal_activity_id: Uuid,
-    pub activity: String, // canonical representation
+pub struct UnsignedActivity {
+    pub params: ActivityParams,
+    pub message: String, // canonical representation
 }
 
 #[derive(Deserialize)]
-pub struct SignedUpdate {
-    pub internal_activity_id: Uuid,
+pub struct SignedActivity {
+    pub params: ActivityParams,
     pub signer: String,
     pub signature: String,
 }

src/mastodon_api/accounts/views.rs

@@ -88,6 +88,7 @@ use super::types::{
     Account,
     AccountCreateData,
     AccountUpdateData,
+    ActivityParams,
     ApiSubscription,
     FollowData,
     FollowListQueryParams,
@@ -97,9 +98,9 @@ use super::types::{
     RelationshipQueryParams,
     SearchAcctQueryParams,
     SearchDidQueryParams,
-    SignedUpdate,
+    SignedActivity,
     StatusListQueryParams,
-    UnsignedUpdate,
+    UnsignedActivity,
 };
 
 #[post("")]
@@ -246,9 +247,9 @@ async fn get_unsigned_update(
     ).map_err(|_| HttpError::InternalError)?;
     let canonical_json = canonicalize_object(&activity)
         .map_err(|_| HttpError::InternalError)?;
-    let data = UnsignedUpdate {
-        internal_activity_id,
-        activity: canonical_json,
+    let data = UnsignedActivity {
+        params: ActivityParams::Update { internal_activity_id },
+        message: canonical_json,
     };
     Ok(HttpResponse::Ok().json(data))
 }
@@ -258,7 +259,7 @@ async fn send_signed_update(
     auth: BearerAuth,
     config: web::Data<Config>,
     db_pool: web::Data<Pool>,
-    data: web::Json<SignedUpdate>,
+    data: web::Json<SignedActivity>,
 ) -> Result<HttpResponse, HttpError> {
     let db_client = &mut **get_database_client(&db_pool).await?;
     let current_user = get_current_user(db_client, auth.token()).await?;
@@ -267,11 +268,12 @@ async fn send_signed_update(
     if !current_user.profile.identity_proofs.any(&signer) {
         return Err(ValidationError("unknown signer").into());
     };
+    let ActivityParams::Update { internal_activity_id } = data.params;
     let mut outgoing_activity = prepare_signed_update_person(
         db_client,
         &config.instance(),
         &current_user,
-        data.internal_activity_id,
+        internal_activity_id,
     ).await.map_err(|_| HttpError::InternalError)?;
     let canonical_json = canonicalize_object(&outgoing_activity.activity)
         .map_err(|_| HttpError::InternalError)?;