[IMP] supplier_portal: added supplier portal

-Introduced a new route allowing suppliers to upload invoices
 in PDF and XML format.
-Added a webpage with a company selection dropdown, displaying companies
 linked to the user.
-Successfully uploaded documents will generate a new draft vendor bill
 in the backend.

Author: siha-odoo

supplier_portal/__init__.py

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+from . import controllers

supplier_portal/__manifest__.py

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+{
+    "name": "Supplier Portal",
+    "version": "1.0",
+    "author": "Harsh Siddhapara siha",
+    "depends": ["account", "website"],
+    "data": [
+        "views/supplier_portal_template.xml",
+        "views/supplier_portal_website_menu.xml",
+    ],
+    "installable": True,
+    "license": "LGPL-3",
+}

supplier_portal/controllers/__init__.py

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+from . import supplier_portal

supplier_portal/controllers/supplier_portal.py

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+import base64
+from odoo import http
+from odoo.http import request
+from odoo.exceptions import ValidationError
+
+
+class SupplierPortal(http.Controller):
+    @http.route("/supplier/upload", type="http", auth="user", website=True)
+    def supplier_portal_upload_document(self):
+        return request.render("supplier_portal.supplier_portal_upload_template")
+
+    @http.route("/supplier/portal/submit", type="http", auth="user", website=True)
+    def supplier_portal_submit_document(self, **kwargs):
+        """Handles supplier document upload by creating a vendor bill (`account.move`) and attaching uploaded PDF and XML files."""
+        
+        bills = (
+            request.env["account.move"]
+            .sudo().create(
+                {
+                    "partner_id": request.env.user.partner_id.id,
+                    "move_type": "in_invoice",
+                    "company_id": int(kwargs.get("company")),
+                }
+            )
+        )
+        attachments = []
+        uploaded_files = request.httprequest.files.getlist("upload_file")
+        for file in uploaded_files:
+            file_name = file.filename
+            file_extension = file_name.split(".")[-1].lower()
+            if file_extension not in ["pdf", "xml"]:
+                raise ValidationError("Invalid file type. Please upload only PDF or XML files.")
+            mimetype = "application/pdf" if file_extension == "pdf" else "application/xml"
+            attachment = request.env["ir.attachment"].sudo().create(
+                {
+                    "res_id": bills.id,
+                    "res_model": "account.move",
+                    "name": file.filename or "Uploaded PDF",
+                    "datas": base64.b64encode(file.read()),
+                    "mimetype": mimetype,
+                    "type": "binary",
+                }
+            )
+            attachments.append(attachment)
+        
+        return request.render("supplier_portal.after_submit_message_template",
+            {"success_message": f"{len(attachments)} files uploaded successfully."})
+           
+        

supplier_portal/views/supplier_portal_template.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <template id="supplier_portal_upload_template">
+        <t t-call="website.layout">
+            <div class="container mt-5">
+                <h2 class="text-center text-primary mb-4">Upload Supplier Documents</h2>
+                <form action="/supplier/portal/submit" method="post" enctype="multipart/form-data" class="shadow p-4 bg-white rounded">
+                    <input type="hidden" name="csrf_token" t-att-value="request.csrf_token()"/>
+                    <!-- Company Selection -->
+                    <div class="mb-3">
+                        <label class="form-label fw-bold">Select Company</label>
+                        <select id="company" name="company" class="form-select" required="true">
+                            <t t-foreach="request.env.user.company_ids" t-as="company">
+                                <option t-att-value="company.id">
+                                    <t t-esc="company.name"/>
+                                </option>
+                            </t>
+                        </select>
+                    </div>
+                    <!-- Upload file with .pdf or .xml extension -->
+                    <div class="mb-3">
+                        <label class="form-label fw-bold">Upload PDF File</label>
+                        <input type="file" name="upload_file" class="form-control" multiple="multiple" accept=".pdf,.xml"/>
+                    </div>
+                    <div class="text-center">
+                        <button type="submit" class="btn btn-primary px-4">Submit</button>
+                    </div>
+                </form>
+            </div>
+        </t>
+    </template>
+    <template id="after_submit_message_template">
+        <t t-call="website.layout">
+            <div class="container mt-5">
+                <t t-if="success_message">
+                    <div class="alert alert-success text-center" role="alert">
+                        <t t-esc="success_message" />
+                    </div>
+                </t>
+            </div>
+        </t>
+    </template>
+</odoo>

supplier_portal/views/supplier_portal_website_menu.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="menu_supplier_portal" model="website.menu">
+        <field name="name">Upload Document</field>
+        <field name="url">/supplier/upload/</field>
+        <field name="parent_id" ref="website.main_menu"/>
+        <field name="sequence">10</field>
+        <field name="group_ids" eval="[(6, 0, [ref('base.group_portal')])]"/>
+    </record>
+
+</odoo>