added Feedback page, added braindump backend

hooks/firebase/useDeleteFeedback.ts

@@ -0,0 +1,45 @@
+import {useAuthContext} from "@/contexts/AuthContext";
+import {useMutation, useQueryClient} from "react-query";
+import firestore from "@react-native-firebase/firestore";
+
+export const useDeleteFeedback = () => {
+  const { user: currentUser } = useAuthContext();
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationKey: ["deleteFeedback"],
+    mutationFn: async (feedbackId: string) => {
+      try {
+        // Find the document with matching id field
+        const snapshot = await firestore()
+          .collection("Feedbacks")
+          .where("id", "==", feedbackId)
+          .get();
+
+        if (snapshot.empty) {
+          throw new Error("Feedback not found");
+        }
+
+        // Get the first matching document
+        const docId = snapshot.docs[0].id;
+
+        // Optional: Check if the current user is the creator
+        const feedbackData = snapshot.docs[0].data();
+        if (feedbackData.creatorId !== currentUser?.uid) {
+          throw new Error(
+            "Unauthorized: You can only delete your own feedback"
+          );
+        }
+
+        // Delete the document
+        await firestore().collection("Feedbacks").doc(docId).delete();
+      } catch (e) {
+        console.error("Error deleting feedback: ", e);
+        throw e; // Re-throw the error to be handled by the mutation
+      }
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries("feedbacks");
+    },
+  });
+};