Add creating new group chats

src/graphql.rs

@@ -581,6 +581,30 @@ impl Mutation {
 
         Ok(chat_uuid.to_simple().to_string().into())
     }
+
+    async fn newGroupChat(context: &Context, user: ID, password_hash: String, title: String, description: Option<String>, with: Vec<ID>) -> FieldResult<ID> {
+        let user = id_to_uuid(&user)?.to_simple();
+        user_authentication(&context.db, &user, &password_hash).await?;
+        let mut chat_partners = BTreeSet::new();
+        for u in with {
+            let u = id_to_uuid(&u)?.to_simple();
+            user_exists(&context.db, &u).await?;
+            chat_partners.insert(u);
+        }
+        chat_partners.insert(user);
+
+        let group_chat_uuid = Uuid::new_v4();
+        sqlx::query(format!(
+            r#"INSERT INTO chat_index VALUES ("{}", 1, "{}", {}, "{}")"#,
+            group_chat_uuid.to_simple(),
+            title,
+            description.map(|d| format!(r#""{}""#, d)).unwrap_or("NULL".to_string()),
+            format_array_for_sql(chat_partners)
+        ).as_str()).execute(&context.db).await?;
+        crate::sqlite::create_chat(&context.db, &group_chat_uuid).await?;
+
+        Ok(group_chat_uuid.to_simple().to_string().into())
+    }
 }
 
 pub type Schema<'root_node> = RootNode<'root_node, Query, Mutation, EmptySubscription<Context>>;