Add an endpoint to delete assignments

dbschema/default.esdl

@@ -104,6 +104,7 @@ module default {
 
 		multi updates: Change {
 			on target delete allow;
+			on source delete delete target;
 		};
 
 		multi completedBy: User {

dbschema/migrations/00016.edgeql

@@ -0,0 +1,9 @@
+CREATE MIGRATION m1k5kk6wjhcyjkqblwsla7tml2hbmfohxsdafccqr45wapyvwfwhva
+    ONTO m1hmgl6ihppy3vtahtblnbmpvhbrn7vtjhloj5f7f2e6qgwsn7eqgq
+{
+  ALTER TYPE default::Assignment {
+      ALTER LINK updates {
+          ON SOURCE DELETE DELETE TARGET;
+      };
+  };
+};

src/routes/assignments/delete.ts

@@ -0,0 +1,44 @@
+import e from "@edgedb";
+import { DATABASE_READ_FAILED, UNAUTHORIZED } from "constants/responses";
+import Elysia from "elysia";
+import { HttpStatusCode } from "elysia-http-status-code";
+import { client } from "index";
+import { auth } from "plugins/auth";
+import { promiseResult } from "utils/errors";
+import { responseBuilder } from "utils/response";
+
+export const deleteAssignment = new Elysia()
+	.use(HttpStatusCode())
+	.use(auth)
+	.delete("/:id", async ({ auth, set, httpStatus, params }) => {
+		if (!auth.isAuthorized) {
+			set.status = httpStatus.HTTP_401_UNAUTHORIZED;
+			return UNAUTHORIZED;
+		}
+
+		const query = e.delete(e.Assignment, (a) => ({
+			filter_single: e.op(
+				e.op(a.id, "=", e.cast(e.uuid, params.id)),
+				"and",
+				e.op(auth.username, "in", a.class.students.username),
+			),
+		}));
+		const result = await promiseResult(() => query.run(client));
+
+		if (result.isError) {
+			set.status = httpStatus.HTTP_500_INTERNAL_SERVER_ERROR;
+			return DATABASE_READ_FAILED;
+		}
+		if (!result.data) {
+			// Either the user isn't in the class and/or the homework doesn't exist
+			set.status = httpStatus.HTTP_404_NOT_FOUND;
+			return responseBuilder("error", {
+				error: "Homework not found in any of your classes",
+			});
+		}
+
+		return responseBuilder("success", {
+			message: "Successfully deleted assignment",
+			data: null,
+		});
+	});

src/routes/assignments/index.ts

@@ -1,7 +1,9 @@
 import Elysia from "elysia";
 import { createAssignment } from "./create";
+import { deleteAssignment } from "./delete";
 import { listAssignments } from "./list";
 
 export const assignmentsRouter = new Elysia({ prefix: "/assignments" })
 	.use(listAssignments)
-	.use(createAssignment);
+	.use(createAssignment)
+	.use(deleteAssignment);

src/routes/assignments/list.ts

@@ -169,6 +169,7 @@ export const listAssignments = new Elysia().use(HttpStatusCode()).get(
 				user: upd.user,
 				time: upd.time.getTime(),
 			})),
+			id: assignment.id,
 		}));
 
 		return responseBuilder("success", {