feat: Add Telegram chat ID to ShopModel for automatic invoice sending

chore: Update Dockerfile to install WeasyPrint dependencies

feat: Enhance ShopOrderModelAdmin with invoice download buttons

feat: Implement invoice generation for OrderModel and ShopOrderModel

feat: Send invoice to shop's Telegram chat upon ShopOrderModel creation

feat: Create Celery task to send shop order invoice via Telegram

feat: Add invoice download endpoints for OrderModel and ShopOrderModel

feat: Implement views for downloading order and shop order invoices

chore: Update requirements.txt to include necessary packages for PDF generation

feat: Create HTML templates for order and shop order invoices

backend/order/admin.py

@@ -12,6 +12,8 @@ from azbankgateways.models.banks import Bank
 from unfold.decorators import action
 from django.shortcuts import redirect
 from .permissons import ShopOrderAdminPermission
+from django.urls import reverse
+from django.utils.safestring import mark_safe
 
 class OrderItemModelInline(StackedInline):
     model = OrderItemModel
@@ -97,6 +99,22 @@ class ShopOrderItemInline(StackedInline):
 @admin.register(ShopOrderModel)
 class ShopOrderModelAdmin(ShopOrderAdminPermission, ModelAdmin):
     inlines = [ShopOrderItemInline]
+    list_display = ['id', 'shop', 'order', 'customer_name', 'status', 'is_paid', 'is_settled', 'download_invoice_button']
+    readonly_fields = ['download_invoice_link']
+
+    def download_invoice_button(self, obj):
+        if obj.pk:
+            url = reverse('download-shop-order-invoice', args=[obj.pk])
+            return mark_safe(f'<a class="button" href="{url}" target="_blank" style="background-color: #28a745; color: white; border-color: #28a745;">دانلود فاکتور</a>')
+        return '-'
+    download_invoice_button.short_description = 'فاکتور'
+    
+    def download_invoice_link(self, obj):
+        if obj.pk:
+            url = reverse('download-shop-order-invoice', args=[obj.pk])
+            return mark_safe(f'<a href="{url}" target="_blank" style="background-color: #28a745; color: white; padding: 10px 20px; text-decoration: none; border-radius: 5px; display: inline-block;">دانلود فاکتور PDF</a>')
+        return '-'
+    download_invoice_link.short_description = 'دانلود فاکتور'
 
 
     def get_queryset(self, request):
@@ -118,8 +136,8 @@ class OrderAdmin(ModelAdmin, ImportExportModelAdmin):
     search_fields = ['user__phone', 'user__first_name', 'user__last_name', 'user__email']
     list_filter = ['is_paid', 'status']
     actions_list = ['redirect_to_learn', 'udpate_bank_status']
-    list_display = ['order_id', 'user', 'is_paid', 'status', 'discount_code', 'address',]
-    readonly_fields = ('created_at', 'tax', 'final_price', 'cart_total', 'discount_amount', 'discount_code', 'user', 'address', 'is_paid')
+    list_display = ['order_id', 'user', 'is_paid', 'status', 'discount_code', 'address', 'download_invoice_button']
+    readonly_fields = ('created_at', 'tax', 'final_price', 'cart_total', 'discount_amount', 'discount_code', 'user', 'address', 'is_paid', 'download_invoice_link')
     compressed_fields = True
     warn_unsaved_form = True
     # exclude = ('bank_records',)
@@ -129,9 +147,24 @@ class OrderAdmin(ModelAdmin, ImportExportModelAdmin):
         }
     }
     inlines = [OrderItemModelInline, BankRecordInline]
+
     def order_id(self, obj):
         return f"سفارش {obj.pk + 1000}"
     order_id.short_description = "شماره سفارش"
+    
+    def download_invoice_button(self, obj):
+        if obj.pk:
+            url = reverse('download-order-invoice', args=[obj.pk])
+            return mark_safe(f'<a class="button" href="{url}" target="_blank" style="background-color: #28a745; color: white; border-color: #28a745;">دانلود فاکتور</a>')
+        return '-'
+    download_invoice_button.short_description = 'فاکتور'
+    
+    def download_invoice_link(self, obj):
+        if obj.pk:
+            url = reverse('download-order-invoice', args=[obj.pk])
+            return mark_safe(f'<a href="{url}" target="_blank" style="background-color: #28a745; color: white; padding: 10px 20px; text-decoration: none; border-radius: 5px; display: inline-block;">دانلود فاکتور PDF</a>')
+        return '-'
+    download_invoice_link.short_description = 'دانلود فاکتور'