N-FIN-5: add entity delete server action

src/lib/actions/entityDelete.ts

@@ -0,0 +1,62 @@
+import { ActionResponse } from '@/lib/types/ActionResponse';
+import { prismaClient } from '@/prisma';
+import { getUser } from '@/auth';
+import { URL_SIGN_IN } from '@/lib/constants';
+
+export default async function entityDelete(id: number): Promise<ActionResponse> {
+    'use server';
+
+    // check that id is a number
+    if (!id || isNaN(id)) {
+        return {
+            type: 'error',
+            message: 'Invalid entity ID',
+        };
+    }
+
+    // check that user is logged in
+    const user = await getUser();
+    if (!user) {
+        return {
+            type: 'error',
+            message: 'You must be logged in to delete an entity.',
+            redirect: URL_SIGN_IN,
+        };
+    }
+
+    // check that entity is associated with user
+    const entity = await prismaClient.entity.findFirst({
+        where: {
+            id: id,
+            userId: user.id,
+        },
+    });
+    if (!entity) {
+        return {
+            type: 'error',
+            message: 'Entity not found',
+        };
+    }
+
+    // delete entity
+    try {
+        await prismaClient.entity.delete({
+                where: {
+                    id: entity.id,
+                    userId: user.id,
+                },
+            },
+        );
+    } catch (e) {
+        return {
+            type: 'error',
+            message: 'Failed deleting entity',
+        };
+    }
+
+    // return success
+    return {
+        type: 'success',
+        message: `${entity.type} '${entity.name}' deleted`,
+    };
+}