feat(label): Add print_labels for multiple labels

inventree_phomemo/phomemo_label.py

@@ -1,7 +1,5 @@
-# translation
+# django
-from django.utils.translation import gettext_lazy as _
+from django.http import JsonResponse
-from django.core.validators import MinValueValidator
-from django.core.validators import MaxValueValidator
 
 # printer support
 import socket
@@ -14,6 +12,7 @@ from InvenTree.models import InvenTreeBarcodeMixin
 # InvenTree plugin libs
 from plugin import InvenTreePlugin
 from plugin.mixins import LabelPrintingMixin, SettingsMixin, BarcodeMixin
+from label.models import LabelTemplate
 
 from inventree_phomemo.version import PHOMEMO_PLUGIN_VERSION
 
@@ -38,12 +37,7 @@ class PhomemoLabelPlugin(LabelPrintingMixin, BarcodeMixin, SettingsMixin, InvenT
         },
     }
 
-    def print_label(self, **kwargs):
+    def get_fields(self, **kwargs):
-
-        # Read settings
-        ip_address = self.get_setting('IP_ADDRESS')
-        port = int(self.get_setting('PORT'))
-        
         object_to_print = kwargs['label_instance'].object_to_print
 
         match kwargs['label_instance'].SUBDIR:
@@ -72,9 +66,52 @@ class PhomemoLabelPlugin(LabelPrintingMixin, BarcodeMixin, SettingsMixin, InvenT
             'category': tpart.category.name if hasattr(tpart, 'category') else None,
             'category_path': tpart.category.pathstring if hasattr(tpart, 'category') else None,
             'barcode': barcode,
-            'type': kwargs['label_instance'].SUBDIR
+            'type': kwargs['label_instance'].SUBDIR,
+            'width': kwargs['width'],
+            'height': kwargs['height']
         }
 
+        return fields
+
+    def print_labels(self, label: LabelTemplate, items: list, request, **kwargs):
+        outputs = []
+
+        # Get label content for every label
+        for item in items:
+            label.object_to_print = item
+            outputs.append(self.get_fields(label, request, **kwargs))
+
+        # Read settings
+        ip_address = self.get_setting('IP_ADDRESS')
+        port = int(self.get_setting('PORT'))
+
+        # Dump to json
+        data = json.dumps(outputs)
+
+        # Send the label to the printer
+        try:
+            print_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+            print_socket.settimeout(5)
+            print_socket.connect((ip_address, port))
+            print_socket.sendall(bytes(data,encoding="utf-8"))
+            print_socket.close()
+        except Exception as error:
+            raise ConnectionError('Error connecting to printer server: ' + str(error))
+        
+        return JsonResponse({
+            'success': True,
+            'message': f'{len(items)} labels printed',
+        })
+
+    def print_label(self, **kwargs):
+        # Read settings
+        ip_address = self.get_setting('IP_ADDRESS')
+        port = int(self.get_setting('PORT'))
+        
+        # Get label content
+        fields = self.get_fields(self, kwargs)
+
+        # Dump to json
         data = json.dumps(fields)
 
         # Send the label to the printer