Add prefill for donation amount, currency and editor

metabrainz/payments/views.py

@@ -1,10 +1,13 @@
 from __future__ import division
+
+from decimal import Decimal, InvalidOperation
+
 from flask import Blueprint, request, render_template, url_for, redirect, current_app, jsonify
 from flask_babel import gettext
 from flask_login import current_user
 from werkzeug.datastructures import MultiDict
 
-from metabrainz.payments import SUPPORTED_CURRENCIES
+from metabrainz.payments import SUPPORTED_CURRENCIES, Currency
 from metabrainz.model.payment import Payment
 from metabrainz.payments.forms import DonationForm, PaymentForm
 from metabrainz import flash
@@ -22,8 +25,33 @@
 def donate():
     """Regular donation page."""
     form = DonationForm()
-    if current_user is not None and not current_user.is_anonymous:
-        form.editor.data = current_user.musicbrainz_id
+
+    if editor := request.args.get('editor'):
+        form.editor.data = editor
+    else:
+        if current_user is not None and not current_user.is_anonymous:
+            form.editor.data = current_user.musicbrainz_id
+
+    amount = None
+    if _amount := request.args.get('amount'):
+        try:
+            value = Decimal(_amount)
+            if value >= 0:
+                amount = value
+        except (ValueError, TypeError, InvalidOperation):
+            pass
+
+    if amount is None:
+        amount = Decimal(50)
+    form.amount.data = amount
+
+    _currency =  request.args.get('currency', 'usd')
+    if _currency.lower() == 'eur':
+        currency = 'eur'
+    else:
+        currency = 'usd'
+    form.currency.data = currency
+
     return render_template('payments/donate.html', form=form)
 
 

metabrainz/templates/payments/donate.html

@@ -39,7 +39,7 @@ <h1 class="page-title">{{ _('Make a Donation') }}</h1>
           <label for="input-amount" class="col-sm-offset-2 col-sm-3 control-label">{{ _('Amount') }}</label>
           <div class="col-sm-4">
             <div id="input-amount-fg">
-              {{ form.amount(id="input-amount", class="form-control", value="50.00") | safe }}
+              {{ form.amount(id="input-amount", class="form-control") | safe }}
               <div id="currency-selector" class="btn-group" data-toggle="buttons">
                 {% for subfield in form.currency %}
                   <label class="btn btn-primary {{ 'active' if subfield.checked }}">