monthly money

functions/src/project.js

@@ -4,6 +4,15 @@ const { refList } = require("../index");
 const { getSunoTimestamps } = require("./lyrics");
 const { deleteFolder } = require("../helpers/firebase");
 
+const firestore = admin.firestore();
+
+const buildMonthKey = (timestamp) => {
+  const date = timestamp.toDate();
+  const year = date.getUTCFullYear();
+  const month = String(date.getUTCMonth() + 1).padStart(2, "0");
+  return `${year}-${month}`;
+};
+
 exports.onProjectUpdate = onDocumentWritten(
   "projects/{projectId}",
   async (projectSnap) => {
@@ -53,3 +62,69 @@ exports.onProjectUpdate = onDocumentWritten(
     }
   }
 );
+
+exports.onProjectViewsIncrement = onDocumentWritten(
+  "projects/{projectId}",
+  async (projectSnap) => {
+    try {
+      const { projectId } = projectSnap.params;
+      const beforeData = projectSnap?.data?.before?.data() || null;
+      const afterData = projectSnap?.data?.after?.data() || null;
+
+      if (!afterData) return null;
+
+      const beforeViews =
+        typeof beforeData?.views === "number" && Number.isFinite(beforeData.views)
+          ? beforeData.views
+          : 0;
+      const afterViews =
+        typeof afterData?.views === "number" && Number.isFinite(afterData.views)
+          ? afterData.views
+          : 0;
+      const delta = afterViews - beforeViews;
+
+      if (delta <= 0) return null;
+
+      const userId =
+        typeof afterData?.userId === "string" && afterData.userId.trim().length
+          ? afterData.userId.trim()
+          : null;
+      const now = admin.firestore.Timestamp.now();
+      const monthKey = buildMonthKey(now);
+
+      const statsDocRef = firestore
+        .collection("projectStreamStats")
+        .doc(projectId)
+        .collection("monthly")
+        .doc(monthKey);
+
+      await firestore.runTransaction(async (transaction) => {
+        const statsSnapshot = await transaction.get(statsDocRef);
+        const updatePayload = {
+          projectId,
+          userId,
+          monthKey,
+          updatedAt: now,
+          lastStreamAt: now,
+          lastDelta: delta,
+          streams: admin.firestore.FieldValue.increment(delta),
+        };
+
+        const hasFirstStream =
+          statsSnapshot.exists && statsSnapshot.data()?.firstStreamAt;
+        if (!hasFirstStream) {
+          updatePayload.firstStreamAt = now;
+        }
+
+        transaction.set(statsDocRef, updatePayload, { merge: true });
+      });
+
+      return null;
+    } catch (error) {
+      console.log("onProjectViewsIncrement error", {
+        message: error?.message || String(error || ""),
+      });
+      return null;
+    }
+  }
+);