[ADD] send_invoice_by_email: automated action to send invoice by email

send_invoice_by_email/__init__.py

@@ -0,0 +1 @@
+from . import models

send_invoice_by_email/__manifest__.py

@@ -0,0 +1,15 @@
+{
+    'name': 'Send Invoice By Email',
+    'version': '1.0',
+    'summary': 'automated action to send invoice by email',
+    'author': 'chirag Gami(chga)',
+    'category': 'Invoice',
+    'depends': ['base', 'account'],
+    'license': 'LGPL-3',
+    'data': [
+        'views/res_config_settings_views.xml',
+        'views/ir_cron_send_email.xml',
+    ],
+    'installable': True,
+    'application': True,
+}

send_invoice_by_email/models/__init__.py

@@ -0,0 +1,2 @@
+from . import res_config_settings
+from . import account_move

send_invoice_by_email/models/account_move.py

@@ -0,0 +1,33 @@
+from odoo import models, fields
+from datetime import timedelta
+
+
+# Extend account.move class to add cron method and custom email send methods
+class AccountMove(models.Model):
+    _inherit = 'account.move'
+
+    # custom email send method
+    def action_send_invoice_email_custom(self):
+        for invoice in self:
+            template = self.env.ref('account.email_template_edi_invoice', raise_if_not_found=False)
+            if template:
+                template.send_mail(invoice.id, force_send=True)
+
+    # To check which invoice will sent today, call by ir.cron
+    def cron_send_invoice_emails(self):
+        param = self.env['ir.config_parameter'].sudo()
+        days = param.get_param('send_invoice_by_email.send_email_days')
+
+        if not days:
+            return
+
+        days = int(days)
+        target_date = fields.Date.today() - timedelta(days=days)
+
+        invoices = self.search([
+            ('invoice_date', '=', target_date),
+            ('state', '=', 'posted'),
+        ])
+
+        for invoice in invoices:
+            invoice.action_send_invoice_email_custom()

send_invoice_by_email/models/res_config_settings.py

@@ -0,0 +1,8 @@
+from odoo import fields, models
+
+
+class ResConfigSettings(models.TransientModel):
+    ''' Add field send_email_days in res.config.settings model to store Days to sand invoice email '''
+    _inherit = 'res.config.settings'
+
+    send_email_days = fields.Integer(string="Send invoice by email", config_parameter='send_invoice_by_email.send_email_days')

send_invoice_by_email/views/ir_cron_send_email.xml

@@ -0,0 +1,12 @@
+<!-- Create cron to trigger cron_send_invoice_emails mehod everyday -->
+<odoo>
+    <record id="ir_cron_send_invoice_emails_after_days" model="ir.cron">
+        <field name="name">Send Invoice Emails After given Days</field>
+        <field name="model_id" ref="account.model_account_move"/>
+        <field name="state">code</field>
+        <field name="code">model.cron_send_invoice_emails()</field>
+        <field name="interval_number">1</field>
+        <field name="interval_type">days</field>
+        <field name="active">True</field>
+    </record>
+</odoo>

send_invoice_by_email/views/res_config_settings_views.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="res_config_settings_view_form_add_days" model="ir.ui.view">
+        <field name="name">res.config.settings.view.form.add.days</field>
+        <field name="model">res.config.settings</field>
+        <field name="priority" eval="40"/>
+        <field name="inherit_id" ref="account.res_config_settings_view_form"/>
+        <field name="arch" type="xml">
+            <xpath expr="//block[@id='invoicing_settings']" position="inside">
+                <setting id="get_days_to_send_invoice_email" help="Duration in days after the date of invoice">
+                    <field name="send_email_days"/>
+                    <span> Days</span>
+                </setting>
+            </xpath>
+        </field>
+    </record>
+</odoo>