From 86945aa05757e212431f62ca45d1fd22c78049ca Mon Sep 17 00:00:00 2001
From: silverpill <silverpill@firemail.cc>
Date: Mon, 5 Sep 2022 15:57:09 +0000
Subject: [PATCH] Create payment page for Monero subscriptions

---
 src/api/search.ts                       |  17 +-
 src/api/subscriptions-common.ts         |  24 ++
 src/api/subscriptions-monero.ts         |  40 +++
 src/api/users.ts                        |  19 ++
 src/components/SubscriptionEthereum.vue |  25 +-
 src/components/SubscriptionMonero.vue   | 332 ++++++++++++++++++++++++
 src/views/SubscriptionPage.vue          |   9 +
 7 files changed, 444 insertions(+), 22 deletions(-)
 create mode 100644 src/components/SubscriptionMonero.vue

diff --git a/src/api/search.ts b/src/api/search.ts
index 30f98c9..ead8870 100644
--- a/src/api/search.ts
+++ b/src/api/search.ts
@@ -27,7 +27,22 @@ export async function getSearchResults(
   return data
 }
 
-export async function searchProfileByEthereumAddress(
+export async function searchProfilesByAcct(
+  acct: string,
+): Promise<Profile[]> {
+  const url = `${BACKEND_URL}/api/v1/accounts/search`
+  const response = await http(url, {
+    method: "GET",
+    queryParams: { q: acct },
+  })
+  const data = await response.json()
+  if (response.status !== 200) {
+    throw new Error(data.message)
+  }
+  return data
+}
+
+export async function searchProfilesByEthereumAddress(
   walletAddress: string,
 ): Promise<Profile[]> {
   const url = `${BACKEND_URL}/api/v1/accounts/search_did`
diff --git a/src/api/subscriptions-common.ts b/src/api/subscriptions-common.ts
index d044cb5..bc7eb50 100644
--- a/src/api/subscriptions-common.ts
+++ b/src/api/subscriptions-common.ts
@@ -22,3 +22,27 @@ export async function getSubscriptionOptions(
     return data
   }
 }
+
+export interface SubscriptionDetails {
+  id: number,
+  expires_at: string,
+}
+
+export async function getSubscription(
+  senderId: string,
+  recipientId: string,
+): Promise<SubscriptionDetails | null> {
+  const url = `${BACKEND_URL}/api/v1/subscriptions/find`
+  const response = await http(url, {
+    method: "GET",
+    queryParams: { sender_id: senderId, recipient_id: recipientId },
+  })
+  const data = await response.json()
+  if (response.status === 200) {
+    return data
+  } else if (response.status === 404) {
+    return null
+  } else {
+    throw new Error(data.message)
+  }
+}
diff --git a/src/api/subscriptions-monero.ts b/src/api/subscriptions-monero.ts
index 09e9115..10438ea 100644
--- a/src/api/subscriptions-monero.ts
+++ b/src/api/subscriptions-monero.ts
@@ -37,3 +37,43 @@ export async function enableMoneroSubscriptions(
     return data
   }
 }
+
+export interface Invoice {
+  id: string,
+  sender_id: string,
+  recipient_id: string,
+  payment_address: string,
+  status: string,
+}
+
+export async function createInvoice(
+  senderId: string,
+  recipientId: string,
+): Promise<Invoice> {
+  const url = `${BACKEND_URL}/api/v1/subscriptions/invoices`
+  const response = await http(url, {
+    method: "POST",
+    json: { sender_id: senderId, recipient_id: recipientId },
+  })
+  const data = await response.json()
+  if (response.status !== 200) {
+    throw new Error(data.message)
+  } else {
+    return data
+  }
+}
+
+export async function getInvoice(
+  invoiceId: string,
+): Promise<Invoice> {
+  const url = `${BACKEND_URL}/api/v1/subscriptions/invoices/${invoiceId}`
+  const response = await http(url, {
+    method: "GET",
+  })
+  const data = await response.json()
+  if (response.status !== 200) {
+    throw new Error(data.message)
+  } else {
+    return data
+  }
+}
diff --git a/src/api/users.ts b/src/api/users.ts
index aa7f506..fedad8c 100644
--- a/src/api/users.ts
+++ b/src/api/users.ts
@@ -40,6 +40,25 @@ export interface Profile {
   statuses_count: number;
 }
 
+export function guest() {
+  return {
+    id: "",
+    username: "",
+    acct: "",
+    url: "",
+    display_name: "You",
+    note: null,
+    avatar: null,
+    header: null,
+    identity_proofs: [],
+    payment_options: [],
+    fields: [],
+    followers_count: 0,
+    following_count: 0,
+    statuses_count: 0,
+  }
+}
+
 export interface User extends Profile {
   source: Source;
 }
diff --git a/src/components/SubscriptionEthereum.vue b/src/components/SubscriptionEthereum.vue
index 2018211..78c1ffd 100644
--- a/src/components/SubscriptionEthereum.vue
+++ b/src/components/SubscriptionEthereum.vue
@@ -109,8 +109,8 @@ import { BigNumber, FixedNumber } from "ethers"
 import { onMounted, watch } from "vue"
 import { $, $$, $computed, $ref } from "vue/macros"
 
-import { searchProfileByEthereumAddress } from "@/api/search"
-import { Profile, ProfileWrapper } from "@/api/users"
+import { searchProfilesByEthereumAddress } from "@/api/search"
+import { guest, Profile, ProfileWrapper } from "@/api/users"
 import {
   cancelSubscription,
   getSubscriptionConfig,
@@ -132,29 +132,12 @@ const props = defineProps<{
   profile: Profile,
 }>()
 
-const guest: Profile = {
-  id: "",
-  username: "",
-  acct: "",
-  url: "",
-  display_name: "You",
-  note: null,
-  avatar: null,
-  header: null,
-  identity_proofs: [],
-  payment_options: [],
-  fields: [],
-  followers_count: 0,
-  following_count: 0,
-  statuses_count: 0,
-}
-
 const { currentUser } = $(useCurrentUser())
 const { instance } = $(useInstanceInfo())
 const { connectWallet: connectEthereumWallet } = useWallet()
 const recipient = new ProfileWrapper(props.profile)
 const recipientEthereumAddress = recipient.getVerifiedEthereumAddress()
-let sender = $ref<ProfileWrapper>(new ProfileWrapper(currentUser || guest))
+let sender = $ref<ProfileWrapper>(new ProfileWrapper(currentUser || guest()))
 let { walletAddress, walletError, getSigner } = $(useWallet())
 let subscriptionsEnabled = $ref<boolean | null>(null)
 let subscriptionConfig = $ref<SubscriptionConfig | null>(null)
@@ -217,7 +200,7 @@ async function checkSubscription() {
     return
   }
   // Update sender info
-  const profiles = await searchProfileByEthereumAddress(walletAddress)
+  const profiles = await searchProfilesByEthereumAddress(walletAddress)
   if (profiles.length === 1) {
     sender = new ProfileWrapper(profiles[0])
   } else {
diff --git a/src/components/SubscriptionMonero.vue b/src/components/SubscriptionMonero.vue
new file mode 100644
index 0000000..6bfdd9a
--- /dev/null
+++ b/src/components/SubscriptionMonero.vue
@@ -0,0 +1,332 @@
+<template>
+  <div class="subscription">
+    <div class="participants">
+      <component
+        class="profile-card"
+        :is="sender.id ? 'router-link' : 'div'"
+        :to="{ name: 'profile', params: { profileId: sender.id } }"
+      >
+        <avatar :profile="sender"></avatar>
+        <div class="display-name">{{ sender.getDisplayName() }}</div>
+      </component>
+      <div class="separator">
+        <img :src="require('@/assets/feather/arrow-right.svg')">
+      </div>
+      <router-link class="profile-card" :to="{ name: 'profile', params: { profileId: recipient.id }}">
+        <avatar :profile="recipient"></avatar>
+        <div class="display-name">{{ recipient.getDisplayName() }}</div>
+      </router-link>
+    </div>
+    <form class="sender" v-if="sender.id === ''">
+      <input
+        type="text"
+        v-model="senderAcct"
+        placeholder="Enter your fediverse address (user@example.org)"
+      >
+      <button
+        type="submit"
+        class="btn"
+        @click.prevent="identifySender()"
+      >
+        Find profile
+      </button>
+    </form>
+    <div class="info" v-if="subscriptionOption !== null && sender.id !== ''">
+      <template v-if="subscriptionPrice">
+        <div class="price">
+          {{ subscriptionPrice }} XMR
+          <span class="price-subtext">per month</span>
+        </div>
+        <div class="status">
+          <template v-if="!isSubscribed()">
+            You are not subscribed yet
+          </template>
+          <template v-else>
+            <div>
+              Subscription expires
+              {{ formatDate(subscriptionDetails.expires_at) }}
+            </div>
+          </template>
+        </div>
+      </template>
+      <template v-else>
+        Subscription is not available.
+      </template>
+    </div>
+    <form class="payment" v-if="canSubscribe()">
+      <div class="duration">
+        <label for="duration">Duration</label>
+        <input type="number" id="duration" v-model="paymentDuration" min="1">
+        <span>months</span>
+      </div>
+      <div class="payment-amount">
+        <label>Amount</label>
+        <div>{{ getPaymentAmount() }} XMR</div>
+      </div>
+      <button
+        type="submit"
+        class="btn primary"
+        :disabled="!canPay()"
+        @click.prevent="onCreateInvoice()"
+      >
+        <template v-if="!isSubscribed()">
+          Pay
+        </template>
+        <template v-else>Extend</template>
+      </button>
+    </form>
+    <div class="invoice" v-if="invoice">
+      <div>Please send {{ getPaymentAmount() }} XMR to this address:</div>
+      <div class="payment-address">{{ invoice.payment_address }}</div>
+      <div class="invoice-status">
+        <template v-if="invoice.status === 'open'">Waiting for payment</template>
+        <template v-else-if="invoice.status === 'paid'">Waiting for confirmation</template>
+      </div>
+      <button class="btn" @click.prevent="checkInvoice()">Check payment</button>
+    </div>
+    <loader v-if="isLoading"></loader>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { onMounted } from "vue"
+import { $, $ref } from "vue/macros"
+import { DateTime } from "luxon"
+
+import { searchProfilesByAcct } from "@/api/search"
+import { getSubscription, SubscriptionDetails } from "@/api/subscriptions-common"
+import {
+  createInvoice,
+  getInvoice,
+  getPricePerMonth,
+  Invoice,
+} from "@/api/subscriptions-monero"
+import { guest, Profile, ProfilePaymentOption, ProfileWrapper } from "@/api/users"
+import Avatar from "@/components/Avatar.vue"
+import Loader from "@/components/Loader.vue"
+import { useCurrentUser } from "@/store/user"
+import { formatDate } from "@/utils/dates"
+
+/* eslint-disable-next-line no-undef */
+const props = defineProps<{
+  profile: Profile,
+}>()
+
+const { currentUser } = $(useCurrentUser())
+const recipient = new ProfileWrapper(props.profile)
+const senderAcct = $ref("")
+let sender = $ref<ProfileWrapper>(new ProfileWrapper(currentUser || guest()))
+let subscriptionOption = $ref<ProfilePaymentOption | null>(null)
+let subscriptionPrice = $ref<number | null>(null)
+let subscriptionDetails = $ref<SubscriptionDetails | null>(null)
+const paymentDuration = $ref<number>(1)
+let invoice = $ref<Invoice | null>(null)
+
+let isLoading = $ref(false)
+
+onMounted(async () => {
+  subscriptionOption = recipient.payment_options.find((option) => {
+    return option.type === "monero-subscription" && option.price !== undefined
+  }) || null
+  if (subscriptionOption?.price) {
+    subscriptionPrice = getPricePerMonth(subscriptionOption.price)
+    if (sender.id !== "") {
+      subscriptionDetails = await getSubscription(sender.id, recipient.id)
+    }
+  }
+})
+
+async function identifySender() {
+  if (!senderAcct) {
+    return
+  }
+  isLoading = true
+  const profiles = await searchProfilesByAcct(senderAcct)
+  const profile = profiles[0]
+  if (profile && profile.id !== recipient.id) {
+    sender = new ProfileWrapper(profile)
+  }
+  isLoading = false
+}
+
+function isSubscribed(): boolean {
+  if (subscriptionDetails === null) {
+    return false
+  }
+  const expiresAt = DateTime.fromISO(subscriptionDetails.expires_at)
+  return DateTime.now() < expiresAt
+}
+
+function canSubscribe(): boolean {
+  return sender.id !== "" && subscriptionPrice !== null && invoice === null
+}
+
+function getPaymentAmount(): number {
+  if (!subscriptionPrice) {
+    return 0
+  }
+  const amount = subscriptionPrice * paymentDuration
+  return amount
+}
+
+function canPay(): boolean {
+  return getPaymentAmount() > 0
+}
+
+async function onCreateInvoice() {
+  isLoading = true
+  invoice = await createInvoice(
+    sender.id,
+    recipient.id,
+  )
+  isLoading = false
+}
+
+async function checkInvoice() {
+  if (!invoice) {
+    return
+  }
+  isLoading = true
+  invoice = await getInvoice(invoice.id)
+  if (invoice.status === "forwarded") {
+    subscriptionDetails = await getSubscription(sender.id, recipient.id)
+    invoice = null
+  }
+  isLoading = false
+}
+</script>
+
+<style scoped lang="scss">
+@import "../styles/layout";
+@import "../styles/mixins";
+@import "../styles/theme";
+
+.subscription {
+  display: flex;
+  flex-direction: column;
+  gap: $block-outer-padding;
+  text-align: center;
+}
+
+.participants {
+  $avatar-size: 60px;
+
+  align-items: center;
+  display: flex;
+  gap: $block-inner-padding;
+
+  .profile-card {
+    background-color: $block-background-color;
+    border-radius: $block-border-radius;
+    display: flex;
+    flex-basis: 50%;
+    flex-direction: column;
+    gap: $block-inner-padding / 2;
+    min-width: 0;
+    padding: $block-inner-padding;
+  }
+
+  .separator img {
+    height: $icon-size;
+    min-width: $icon-size;
+    object-fit: contain;
+    width: $icon-size;
+  }
+
+  .avatar {
+    height: $avatar-size;
+    margin: 0 auto;
+    width: $avatar-size;
+  }
+
+  .display-name {
+    font-size: 16px;
+  }
+
+  .wallet-address {
+    font-family: monospace;
+    overflow: hidden;
+    text-align: center;
+    text-overflow: ellipsis;
+  }
+}
+
+.sender {
+  align-items: center;
+  display: flex;
+  flex-direction: column;
+  gap: $block-inner-padding;
+}
+
+.info {
+  background-color: $block-background-color;
+  border-radius: $block-border-radius;
+  display: flex;
+  flex-direction: column;
+  gap: $block-inner-padding / 2;
+  padding: $block-inner-padding;
+
+  .price {
+    font-size: 16px;
+    font-weight: bold;
+  }
+
+  .price-subtext {
+    font-size: $text-font-size;
+  }
+
+  .status {
+    color: $secondary-text-color;
+  }
+}
+
+.payment {
+  align-items: center;
+  display: flex;
+  flex-direction: column;
+  gap: $block-inner-padding;
+
+  .duration,
+  .payment-amount {
+    align-items: center;
+    display: flex;
+    gap: $input-padding;
+    justify-content: center;
+  }
+
+  .duration {
+    font-size: 16px;
+
+    label {
+      font-weight: bold;
+    }
+
+    input {
+      width: 100px;
+    }
+  }
+
+  .payment-amount {
+    font-size: 16px;
+    font-weight: bold;
+  }
+}
+
+.invoice {
+  align-items: center;
+  display: flex;
+  flex-direction: column;
+  gap: $block-inner-padding;
+
+  .payment-address {
+    font-family: monospace;
+    max-width: 100%;
+    user-select: all;
+    word-wrap: break-word;
+  }
+}
+
+.loader {
+  margin: 0 auto;
+}
+</style>
diff --git a/src/views/SubscriptionPage.vue b/src/views/SubscriptionPage.vue
index 038e9cf..470be10 100644
--- a/src/views/SubscriptionPage.vue
+++ b/src/views/SubscriptionPage.vue
@@ -3,6 +3,7 @@
     <template #content>
       <h1>Subscription</h1>
       <subscription-ethereum v-if="isEthereum()" :profile="profile"></subscription-ethereum>
+      <subscription-monero v-if="isMonero()" :profile="profile"></subscription-monero>
     </template>
   </sidebar-layout>
 </template>
@@ -15,6 +16,7 @@ import { useRoute } from "vue-router"
 import { getProfile, Profile } from "@/api/users"
 import SidebarLayout from "@/components/SidebarLayout.vue"
 import SubscriptionEthereum from "@/components/SubscriptionEthereum.vue"
+import SubscriptionMonero from "@/components/SubscriptionMonero.vue"
 import { useCurrentUser } from "@/store/user"
 import { useInstanceInfo } from "@/store/instance"
 
@@ -46,4 +48,11 @@ function isEthereum(): boolean {
   }
   return blockchain.chain_id.startsWith("eip155")
 }
+
+function isMonero(): boolean {
+  if (!blockchain) {
+    return false
+  }
+  return blockchain.chain_id.startsWith("monero")
+}
 </script>