borrow and return Ressource -- need to test

services/borrowRessource.ts

@@ -0,0 +1,24 @@
+import { Ressources } from "@/class/class";
+import { db } from "@/firebase_config";
+import { doc, runTransaction, increment, arrayUnion } from "firebase/firestore";
+
+export async function borrowRessource(chantierId: string, ressource: Ressources, quantity: number) {
+    const chantierRef = doc(db, "chantier", chantierId);
+    const ressourceRef = doc(db, "ressources", ressource.id.toString());
+    await runTransaction(db, async (transaction) => {
+        const resSnap = await transaction.get(ressourceRef);
+        if (!resSnap.exists()) throw new Error("Ressource not found");
+
+        const available = resSnap.data().available_quantity;
+        if (available < quantity) throw new Error("Not enough quantity available");
+
+        transaction.update(ressourceRef, {
+            available_quantity: increment(-quantity),
+        });
+
+        const borrowed: Ressources = { ...ressource, quantity };
+        transaction.update(chantierRef, {
+            vehicules: arrayUnion(borrowed),
+        });
+    });
+}

services/returnRessource.ts

@@ -0,0 +1,21 @@
+import { Ressources } from "@/class/class";
+import { db } from "@/firebase_config";
+import { arrayRemove, doc, increment, runTransaction } from "firebase/firestore";
+
+export async function returnRessource(chantierId: string, ressource: Ressources) {
+    const chantierRef = doc(db, "chantier", chantierId);
+    const ressourceRef = doc(db, "ressources", ressource.id.toString());
+
+    await runTransaction(db, async (transaction) => {
+        const resSnap = await transaction.get(ressourceRef);
+        if (!resSnap.exists()) throw new Error("Ressource not found");
+
+        transaction.update(ressourceRef, {
+            available_quantity: increment(ressource.quantity),
+        });
+
+        transaction.update(chantierRef, {
+            vehicules: arrayRemove(ressource),
+        });
+    });
+}