[regional] ability to send gst reminders to all parties

erpnext/templates/pages/regional/india/update-gstin.html

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+{% extends "templates/web.html" %}
+
+{% block title %}Update GSTIN{% endblock %}
+
+{% block header %}<h2>Update GSTIN</h2>{% endblock %}
+
+{% block page_content %}
+<h3>{{ party.name }}</h3>
+{% if invalid_gstin %}
+	<p class='alert alert-danger' style='max-width: 300px;'>
+		Invalid GSTIN
+	</p>
+	<p>
+		<a href="?party={{ party.name }}">Edit Again</a>
+	</p>
+{% elif updated %}
+	<p class='alert alert-success' style='max-width: 300px;'>
+		<i class='octicon octicon-check'></i> GSTIN Updated
+	</p>
+	<p>
+		<a href="?party={{ party.name }}">Edit Again</a>
+	</p>
+{% else %}
+	<p class='text-muted'>Please update your GSTIN for us to issue correct tax invoice</p>
+	<form method='GET' action='/regional/india/update-gstin.html'>
+		<input type='hidden' value='{{ party.name }}' name='party'>
+		{% for address in party.__onload.addr_list %}
+		<div class='bordered' style='max-width: 300px; margin-bottom: 15px;'>
+			{{ address.display }}
+			<p><input type='text' class='form-control'
+				value='{{ address.gstin }}' name='{{ address.name }}' placeholder='GSTIN'></p>
+		</div>
+		{% endfor %}
+		<p><input type='submit' class='btn btn-primary' value='Update'></p>
+	</form>
+{% endif %}
+{% endblock %}

erpnext/templates/pages/regional/india/update_gstin.py

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+import frappe
+from frappe import _
+
+def get_context(context):
+	context.no_cache = 1
+	party = frappe.form_dict.party
+
+	try:
+		update_gstin(context)
+	except frappe.ValidationError:
+		context.invalid_gstin = 1
+
+	party_type = 'Customer'
+	party = frappe.db.get_value('Customer', party)
+
+	if not party:
+		party_type = 'Supplier'
+		party = frappe.db.get_value('Supplier', party)
+
+	if not party:
+		frappe.throw(_("Not Found"), frappe.DoesNotExistError)
+
+	context.party = frappe.get_doc(party_type, party)
+	context.party.onload()
+
+
+def update_gstin(context):
+	dirty = False
+	for key, value in frappe.form_dict.items():
+		if key != 'party':
+			address_name = frappe.get_value('Address', key)
+			if address_name:
+				address = frappe.get_doc('Address', address_name)
+				address.gstin = value
+				address.save(ignore_permissions=True)
+				dirty = True
+
+	if dirty:
+		frappe.db.commit()
+		context.updated = True