shipping label in PDF format

Author: jans23

delivery_ups_oca/__manifest__.py

@@ -19,6 +19,9 @@
         "delivery_state",
         "stock_picking_declared_value",
     ],
+    "external_dependencies": {
+        "python": ["Pillow"],
+    },
     "data": [
         "security/ir.model.access.csv",
         "data/product_packaging_data.xml",

delivery_ups_oca/models/delivery_carrier.py

@@ -6,6 +6,9 @@
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
 
 import base64
+import io
+import PIL.PdfImagePlugin
+from PIL import Image
 
 from odoo import _, fields, models
 from odoo.exceptions import UserError
@@ -23,7 +26,7 @@ class DeliveryCarrier(models.Model):
         },
     )
     ups_file_format = fields.Selection(
-        selection=[("GIF", "GIF"), ("ZPL", "ZPL"), ("EPL", "EPL"), ("SPL", "SPL")],
+        selection=[("PDF", "PDF"), ("GIF", "GIF"), ("ZPL", "ZPL"), ("EPL", "EPL"), ("SPL", "SPL")],
         default="GIF",
         string="File format",
     )
@@ -158,6 +161,20 @@ def ups_create_shipping(self, picking):
     def ups_send_shipping(self, pickings):
         return [self.ups_create_shipping(p) for p in pickings]
 
+    def _convert_gif_to_pdf(self, gif_data):
+        """Convert GIF image data to PDF format with proper 6x4" page size
+        :param gif_data: base64 encoded GIF data
+        :returns: base64 encoded PDF data
+        """
+        # Decode base64 GIF data
+        img_decoded = base64.b64decode(gif_data)
+        image_string = io.BytesIO(img_decoded)
+        im = Image.open(image_string)
+        label_result = io.BytesIO()
+        # Set resolution to 236 DPI (standard for 6x4" UPS labels)
+        im.save(label_result, 'PDF', resolution=236.0)
+        return base64.b64encode(label_result.getvalue()).decode('utf-8')
+
     def _prepare_ups_label_attachment(self, picking, values):
         return {
             "name": values["name"],
@@ -171,17 +188,25 @@ def _create_ups_label(self, picking, labels):
         val_list = []
         for label in labels:
             format_code = label["format_code"].upper()
+            label_data = label["datas"]
+            file_extension = format_code
+            
+            # Convert GIF to PDF only when PDF format is explicitly selected
+            if self.ups_file_format == "PDF" and format_code == "GIF":
+                label_data = self._convert_gif_to_pdf(label_data)
+                file_extension = "PDF"
+            
             attachment_name = "%s-%s.%s" % (
                 label["tracking_ref"],
-                format_code,
-                format_code,
+                self.ups_file_format if self.ups_file_format == "PDF" else format_code,
+                file_extension.lower(),
             )
             val_list.append(
                 self._prepare_ups_label_attachment(
                     picking,
                     {
                         "name": attachment_name,
-                        "datas": label["datas"],
+                        "datas": label_data,
                     },
                 )
             )

delivery_ups_oca/models/ups_request.py

@@ -267,9 +267,11 @@ def _partner_to_shipping_data(self, partner, **kwargs):
         return result
 
     def _label_data(self):
-        res = {"LabelImageFormat": {"Code": self.file_format}}
+        # When PDF is selected, request GIF from UPS API since UPS doesn't support PDF natively
+        api_format = "GIF" if self.file_format == "PDF" else self.file_format
+        res = {"LabelImageFormat": {"Code": api_format}}
         # According to documentation, we need to specify sizes in some formats
-        if self.file_format != "GIF":
+        if api_format != "GIF":
             res["LabelStockSize"] = {"Height": "6", "Width": "4"}
         return res