From 4aaada7cb7e4440d2a6a79ad70b955cda33be0d7 Mon Sep 17 00:00:00 2001
From: ekzyis <ekzyis@ekzyis.com>
Date: Thu, 9 Nov 2023 03:02:03 +0100
Subject: [PATCH] Add invoice view

---
 server/router/handler/invoice.go |  18 +++++-
 vue/src/components/Invoice.vue   | 108 +++++++++++++++++++++++++++++++
 vue/src/index.css                |   4 ++
 vue/src/main.js                  |   4 ++
 vue/src/views/InvoiceView.vue    |  19 ++++++
 5 files changed, 152 insertions(+), 1 deletion(-)
 create mode 100644 vue/src/components/Invoice.vue
 create mode 100644 vue/src/views/InvoiceView.vue

diff --git a/server/router/handler/invoice.go b/server/router/handler/invoice.go
index 4a21cf6..acc8ffd 100644
--- a/server/router/handler/invoice.go
+++ b/server/router/handler/invoice.go
@@ -18,6 +18,7 @@ func HandleInvoiceStatus(sc context.ServerContext) echo.HandlerFunc {
 			invoiceId string
 			invoice   db.Invoice
 			u         db.User
+			qr        string
 			err       error
 		)
 		invoiceId = c.Param("id")
@@ -29,8 +30,23 @@ func HandleInvoiceStatus(sc context.ServerContext) echo.HandlerFunc {
 		if u = c.Get("session").(db.User); invoice.Pubkey != u.Pubkey {
 			return echo.NewHTTPError(http.StatusUnauthorized)
 		}
+		if qr, err = lib.ToQR(invoice.PaymentRequest); err != nil {
+			return err
+		}
 		invoice.Preimage = ""
-		return c.JSON(http.StatusOK, invoice)
+		data := map[string]any{
+			"Id":             invoice.Id,
+			"Msats":          invoice.Msats,
+			"MsatsReceived":  invoice.MsatsReceived,
+			"Hash":           invoice.Hash,
+			"PaymentRequest": invoice.PaymentRequest,
+			"CreatedAt":      invoice.CreatedAt,
+			"ExpiresAt":      invoice.ExpiresAt,
+			"ConfirmedAt":    invoice.ConfirmedAt,
+			"HeldSince":      invoice.HeldSince,
+			"Qr":             qr,
+		}
+		return c.JSON(http.StatusOK, data)
 	}
 }
 
diff --git a/vue/src/components/Invoice.vue b/vue/src/components/Invoice.vue
new file mode 100644
index 0000000..8dd485d
--- /dev/null
+++ b/vue/src/components/Invoice.vue
@@ -0,0 +1,108 @@
+<template>
+  <div class="flex flex-col">
+    <router-link v-if="success" :to="callbackUrl" class="label success font-mono">
+      <div>Paid</div>
+      <small>Redirecting in {{ redirectTimeout }} ...</small>
+    </router-link>
+    <div class="font-mono my-3">
+      Payment Required
+    </div>
+    <div v-if="error" class="label error font-mono">
+      <div>Error</div>
+      <small>{{ error }}</small>
+    </div>
+    <div v-if="invoice">
+      <figure class="flex flex-col m-auto">
+        <a class="m-auto" :href="'lightning:' + invoice.PaymentRequest">
+          <img :src="'data:image/png;base64,' + invoice.Qr" />
+        </a>
+        <figcaption class="flex flex-row my-3 font-mono text-xs">
+          <span class="w-[80%] text-ellipsis overflow-hidden">{{ invoice.PaymentRequest }}</span>
+          <button @click.prevent="copy">{{ label }}</button>
+        </figcaption>
+      </figure>
+      <div class="grid text-muted text-xs">
+        <span class="mx-3 my-1">payment hash</span><span class="text-ellipsis overflow-hidden font-mono me-3 my-1">
+          {{ invoice.Hash }}
+        </span>
+        <span class="mx-3 my-1">created at</span><span class="text-ellipsis overflow-hidden font-mono me-3 my-1">
+          {{ invoice.CreatedAt }}
+        </span>
+        <span class="mx-3 my-1">expires at</span><span class="text-ellipsis overflow-hidden font-mono me-3 my-1">
+          {{ invoice.ExpiresAt }}
+        </span>
+        <span class="mx-3 my-1">msats</span><span class="text-ellipsis overflow-hidden font-mono me-3 my-1">
+          {{ invoice.Msats }}
+        </span>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { ref } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
+
+const router = useRouter()
+const route = useRoute()
+// TODO validate callback url
+const callbackUrl = route.params.callbackUrl ?? '/'
+
+const INVOICE_POLL = 2000
+const poll = async () => {
+  const url = window.origin + '/api/invoice/' + route.params.id
+  const res = await fetch(url)
+  const body = await res.json()
+  if (body.ConfirmedAt) {
+    success.value = true
+    clearInterval(interval)
+    setInterval(() => {
+      if (--redirectTimeout.value === 0) {
+        router.push(callbackUrl)
+      }
+    }, 1000)
+  }
+}
+const interval = setInterval(poll, INVOICE_POLL)
+
+const invoice = ref(null)
+const redirectTimeout = ref(3)
+const success = ref(null)
+const error = ref(null)
+const label = ref('copy')
+let copyTimeout = null
+
+const copy = () => {
+  navigator.clipboard?.writeText(invoice.value.PaymentRequest)
+  label.value = 'copied'
+  if (copyTimeout) clearTimeout(copyTimeout)
+  copyTimeout = setTimeout(() => { label.value = 'copy' }, 1500)
+}
+
+await (async () => {
+  const url = window.origin + '/api/invoice/' + route.params.id
+  const res = await fetch(url)
+  const body = await res.json()
+  invoice.value = body
+})()
+</script>
+
+<style scoped>
+img {
+  width: 256px;
+  height: auto;
+}
+
+figcaption {
+  margin: 0.75em auto;
+  width: 256px;
+}
+
+.label {
+  margin: 1em auto;
+}
+
+div.grid {
+  grid-template-columns: auto auto;
+}
+</style>
diff --git a/vue/src/index.css b/vue/src/index.css
index 84fde86..2ef490e 100644
--- a/vue/src/index.css
+++ b/vue/src/index.css
@@ -59,4 +59,8 @@ a.selected {
 
 .error:hover {
   background-color: #ff7386;
+}
+
+.text-muted {
+  opacity: 0.5
 }
\ No newline at end of file
diff --git a/vue/src/main.js b/vue/src/main.js
index 1b7fdbb..225d414 100644
--- a/vue/src/main.js
+++ b/vue/src/main.js
@@ -9,6 +9,7 @@ import MarketsView from '@/views/MarketsView'
 import LoginView from '@/views/LoginView'
 import UserView from '@/views/UserView'
 import MarketView from '@/views/MarketView'
+import InvoiceView from '@/views/InvoiceView'
 
 const routes = [
   {
@@ -22,6 +23,9 @@ const routes = [
   },
   {
     path: '/market/:id', component: MarketView
+  },
+  {
+    path: '/invoice/:id', component: InvoiceView
   }
 ]
 const router = VueRouter.createRouter({
diff --git a/vue/src/views/InvoiceView.vue b/vue/src/views/InvoiceView.vue
new file mode 100644
index 0000000..ce6d2df
--- /dev/null
+++ b/vue/src/views/InvoiceView.vue
@@ -0,0 +1,19 @@
+<template>
+  <!-- eslint-disable -->
+  <div class="my-3">
+    <pre>
+ _  _    ___ ____  
+| || |  / _ \___ \ 
+| || |_| | | |__) |
+|__   _| |_| / __/ 
+   |_|  \___/_____|</pre>
+  </div>
+  <!-- eslint-enable -->
+  <Suspense>
+    <Invoice />
+  </Suspense>
+</template>
+
+<script setup>
+import Invoice from '@/components/Invoice'
+</script>