WIP message-delivery-method-web-push

services/message-delivery-method-web-push/src/server.ts

@@ -0,0 +1,81 @@
+import webpush from "web-push";
+
+import { CouchDBChangesStream } from "couchdb-changes-stream";
+import { qrDb, messagesDbUrl } from "./dbs";
+import { setupVapidDetails } from "./setupVapidDetails";
+import type { MessageDocument } from "@hereconnect/types";
+import { ServiceSeqTracker } from "./serviceSeqTracker";
+
+const serviceSeqTracker = new ServiceSeqTracker();
+
+const start = async () => {
+  await setupVapidDetails();
+  const since = await serviceSeqTracker.getSince();
+
+  const changesStream = new CouchDBChangesStream<MessageDocument>(
+    messagesDbUrl,
+    {
+      since,
+      feed: "continuous",
+      include_docs: true,
+      heartbeat: 1000,
+      filter: "_selector",
+      selector: {
+        type: "message",
+      },
+    },
+  );
+
+  // Gracefully handle SIGINT
+  process.on("SIGINT", async () => {
+    changesStream.stop();
+    process.stdout.write("\n");
+    process.exit(2);
+  });
+
+  console.info("Service started from sequence", since);
+
+  for await (const change of changesStream) {
+    const { seq, doc } = change;
+
+    if (!doc) {
+      console.error("Change missing document:", change);
+      continue;
+    }
+
+    serviceSeqTracker.checkNextSeq(seq);
+
+    try {
+      if (doc.from === "guest") {
+        const qrDoc = await qrDb.get(`qr:${doc.qr_code_uri}`);
+        if (qrDoc.messageDeliveryMethod !== "webPush") {
+          console.log(`Skip !webPush`);
+          continue;
+        }
+
+        console.log("FROM GUEST");
+        console.log(qrDoc.user_uuid);
+        console.log(qrDoc.browser_uuid);
+      } else if (doc.from === "owner") {
+        console.log("FROM OWNER");
+      } else {
+        continue;
+      }
+
+      console.log(
+        `Processed change: ${JSON.stringify({ _id: change.id, ref: doc._rev, seq: change.seq })}`,
+      );
+    } catch (error) {
+      console.error(
+        `Failed processing: ${JSON.stringify(error)} change: ${JSON.stringify({ id: doc._id, rev: doc._rev, seq: seq })}`,
+      );
+    } finally {
+      await serviceSeqTracker.saveSeq(seq);
+    }
+  }
+};
+
+start().catch((error) => {
+  console.error("error", error);
+  process.exit(1);
+});