Add listing private chats

src/graphql.rs

@@ -376,6 +376,12 @@ impl Default for RestrictionPolicy {
     }
 }
 
+#[derive(Clone, Debug, PartialEq, Eq, GraphQLObject, Type)]
+pub struct Chat {
+    id: ID,
+    users: Vec<ID>,
+}
+
 #[derive(Clone, Copy, Debug)]
 pub struct Query;
 
@@ -461,6 +467,24 @@ impl Query {
             },
         })
     }
+
+    async fn chats(context: &Context, user: ID, password_hash: String) -> FieldResult<Vec<Chat>> {
+        let user = id_to_uuid(&user)?.to_simple();
+        user_authentication(&context.db, &user, &password_hash).await?;
+
+        let mut chats = Vec::new();
+        for chat in sqlx::query(format!(
+            r#"SELECT id, users FROM chat_index WHERE is_group_chat = 0 AND users LIKE "%{}%""#,
+            user,
+        ).as_str()).fetch_all(&context.db).await? {
+            chats.push(Chat {
+                id: ID::from(chat.try_get::<String, _>("id")?),
+                users: from_sql_formatted_array(chat.try_get("users")?, "users")?.map(|u: String| u.into()).collect(),
+            });
+        }
+
+        Ok(chats)
+    }
 }
 
 #[derive(Clone, Copy, Debug)]