Create extend_subscription page

app/dashboard/__init__.py

@@ -25,4 +25,5 @@ from .views import (
     contact_detail,
     setup_done,
     batch_import,
+    extend_subscription,
 )

app/dashboard/templates/dashboard/extend_subscription.html

@@ -0,0 +1,36 @@
+{% extends 'default.html' %}
+
+{% set active_page = "dashboard" %}
+
+{% block title %}
+  Extend Subscription
+{% endblock %}
+
+{% block default_content %}
+  <div class="card">
+    <div class="card-body">
+      <h1 class="h2">Extend Subscription</h1>
+
+      <p>
+        Your subscription is expired on {{ coinbase_subscription.end_at.format("YYYY-MM-DD") }}
+      </p>
+
+      <div>
+        <a class="buy-with-crypto" data-custom="{{ current_user.id }}"
+           href="{{ coinbase_url }}">
+          Extend for 1 yearly - $30
+        </a>
+        <script src="https://commerce.coinbase.com/v1/checkout.js?version=201807">
+        </script>
+      </div>
+
+      <div class="mt-2">
+        Your subscription will be extended when the payment is confirmed and we'll send you a confirmation email. <br>
+        Please note that it can take up to 1h for processing a cryptocurrency payment.
+      </div>
+
+    </div>
+  </div>
+
+
+{% endblock %}

app/dashboard/views/extend_subscription.py

@@ -0,0 +1,24 @@
+from flask import render_template, flash, redirect, url_for
+from flask_login import login_required, current_user
+
+from app.config import COINBASE_CHECKOUT_ID
+from app.dashboard.base import dashboard_bp
+from app.models import CoinbaseSubscription
+
+
+@dashboard_bp.route("/extend_subscription", methods=["GET", "POST"])
+@login_required
+def extend_subscription_route():
+    coinbase_subscription = CoinbaseSubscription.get_by(user_id=current_user.id)
+    # this page is only for user who has an active coinbase subscription
+    if not coinbase_subscription or not coinbase_subscription.is_active():
+        flash("Unknown error, redirect to home page", "error")
+        return redirect(url_for("dashboard.index"))
+
+    coinbase_url = "https://commerce.coinbase.com/checkout/" + COINBASE_CHECKOUT_ID
+
+    return render_template(
+        "dashboard/extend_subscription.html",
+        coinbase_subscription=coinbase_subscription,
+        coinbase_url=coinbase_url,
+    )