livestream: notifications and comments.

lnbits/extensions/livestream/lnurl.py

@@ -26,7 +26,10 @@ async def lnurl_response(ls_id):
         metadata=await track.lnurlpay_metadata,
     )
 
-    return jsonify(resp.dict())
+    params = resp.dict()
+    params["commentAllowed"] = 300
+
+    return jsonify(params)
 
 
 @livestream_ext.route("/lnurl/cb/<track_id>", methods=["GET"])
@@ -54,6 +57,12 @@ async def lnurl_callback(track_id):
             ),
         )
 
+    comment = request.args.get("comment")
+    if len(comment or "") > 300:
+        return jsonify(
+            LnurlErrorResponse(reason=f"Got a comment with {len(comment)} characters, but can only accept 300").dict()
+        )
+
     ls = await get_livestream_by_track(track_id)
 
     payment_hash, payment_request = await create_invoice(
@@ -61,9 +70,13 @@ async def lnurl_callback(track_id):
         amount=int(amount_received / 1000),
         memo=await track.description(),
         description_hash=hashlib.sha256((await track.lnurlpay_metadata).encode("utf-8")).digest(),
-        extra={"tag": "livestream", "track": track.id},
+        extra={"tag": "livestream", "track": track.id, "comment": comment},
     )
 
-    resp = LnurlPayActionResponse(pr=payment_request, success_action=track.success_action(payment_hash), routes=[],)
+    resp = LnurlPayActionResponse(
+        pr=payment_request,
+        success_action=track.success_action(payment_hash),
+        routes=[],
+    )
 
     return jsonify(resp.dict())

lnbits/extensions/livestream/static/js/index.js

@@ -7,6 +7,7 @@ new Vue({
   mixins: [windowMixin],
   data() {
     return {
+      cancelListener: () => {},
       selectedWallet: null,
       nextCurrentTrack: null,
       livestream: {
@@ -51,6 +52,7 @@ new Vue({
     changedWallet(wallet) {
       this.selectedWallet = wallet
       this.loadLivestream()
+      this.startPaymentNotifier()
     },
     loadLivestream() {
       LNbits.api
@@ -67,6 +69,30 @@ new Vue({
           LNbits.utils.notifyApiError(err)
         })
     },
+    startPaymentNotifier() {
+      this.cancelListener()
+
+      this.cancelListener = LNbits.events.onInvoicePaid(
+        this.selectedWallet,
+        payment => {
+          let satoshiAmount = Math.round(payment.amount / 1000)
+          let trackName = (
+            this.tracksMap[payment.extra.track] || {name: '[unknown]'}
+          ).name
+
+          this.$q.notify({
+            message: `Someone paid <b>${satoshiAmount} sat</b> for the track <em>${trackName}</em>.`,
+            caption: payment.extra.comment
+              ? `<em>"${payment.extra.comment}"</em>`
+              : undefined,
+            color: 'secondary',
+            html: true,
+            timeout: 0,
+            actions: [{label: 'Dismiss', color: 'white', handler: () => {}}]
+          })
+        }
+      )
+    },
     addTrack() {
       let {name, producer, price_sat, download_url} = this.trackDialog.data
 
@@ -171,5 +197,6 @@ new Vue({
   created() {
     this.selectedWallet = this.g.user.wallets[0]
     this.loadLivestream()
+    this.startPaymentNotifier()
   }
 })

lnbits/static/js/base.js

@@ -70,15 +70,37 @@ window.LNbits = {
   },
   events: {
     onInvoicePaid: function (wallet, cb) {
-      if (!this.pis) {
-        this.pis = new EventSource(
+      let listener = ev => {
+        cb(JSON.parse(ev.data))
+      }
+
+      this.listenersCount = this.listenersCount || {[wallet.inkey]: 0}
+      this.listenersCount[wallet.inkey]++
+
+      this.listeners = this.listeners || {}
+      if (!(wallet.inkey in this.listeners)) {
+        this.listeners[wallet.inkey] = new EventSource(
           '/api/v1/payments/sse?api-key=' + wallet.inkey
         )
       }
 
-      this.pis.addEventListener('payment-received', ev =>
-        cb(JSON.parse(ev.data))
+      this.listeners[wallet.inkey].addEventListener(
+        'payment-received',
+        listener
       )
+
+      return () => {
+        this.listeners[wallet.inkey].removeEventListener(
+          'payment-received',
+          listener
+        )
+        this.listenersCount[wallet.inkey]--
+
+        if (this.listenersCount[wallet.inkey] <= 0) {
+          this.listeners[wallet.inkey].close()
+          delete this.listeners[wallet.inkey]
+        }
+      }
     }
   },
   href: {