Change /api/v1/{status_id}/context response format to match Mastodon API

CHANGELOG.md

@@ -18,6 +18,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - Allow `instance_uri` configuration value to contain URI scheme.
 - Changed `Content-Security-Policy` header value in nginx config examples.
+- Changed `/api/v1/{status_id}/context` response format to match Mastodon API.
 
 ## [1.13.1] - 2023-02-09
 

docs/openapi.yaml

@@ -943,6 +943,31 @@ paths:
           description: Post does not belong to user
         404:
           description: Post not found
+  /api/v1/statuses/{status_id}/context:
+    get:
+      summary: View statuses above and below this status in the thread.
+      parameters:
+        - $ref: '#/components/parameters/status_id'
+      responses:
+        200:
+          description: Successful operation.
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  ancestors:
+                    description: Parents in the thread.
+                    type: array
+                    items:
+                      $ref: '#/components/schemas/Status'
+                  descendants:
+                    description: Parents in the thread.
+                    type: array
+                    items:
+                      $ref: '#/components/schemas/Status'
+        404:
+          description: Post not found
   /api/v1/statuses/{status_id}/thread:
     get:
       summary: Get thread that contains given post.

src/mastodon_api/statuses/types.rs

@@ -188,6 +188,12 @@ impl StatusPreview {
     }
 }
 
+#[derive(Serialize)]
+pub struct Context {
+    pub ancestors: Vec<Status>,
+    pub descendants: Vec<Status>,
+}
+
 #[derive(Deserialize)]
 pub struct TransactionData {
     pub transaction_id: String,

src/mastodon_api/statuses/views.rs

@@ -56,6 +56,7 @@ use super::helpers::{
     PostContent,
 };
 use super::types::{
+    Context,
     Status,
     StatusData,
     StatusPreview,
@@ -302,7 +303,22 @@ async fn get_context(
         maybe_current_user.as_ref(),
         posts,
     ).await?;
-    Ok(HttpResponse::Ok().json(statuses))
+    let mut ancestors = vec![];
+    let mut descendants = vec![];
+    let mut is_ancestor = true;
+    for status in statuses {
+        if is_ancestor {
+            if status.id == *status_id {
+                is_ancestor = false;
+                continue;
+            };
+            ancestors.push(status);
+        } else {
+            descendants.push(status);
+        };
+    };
+    let context = Context { ancestors, descendants };
+    Ok(HttpResponse::Ok().json(context))
 }
 
 #[get("/{status_id}/thread")]