feat(label): Switch to JSON

inventree_phomemo/phomemo_label.py

@@ -6,6 +6,7 @@ from django.core.validators import MaxValueValidator
 # printer supportt
 import socket
 import io
+import json
 
 # InvenTree plugin libs
 from plugin import InvenTreePlugin
@@ -32,12 +33,6 @@ class PhomemoLabelPlugin(LabelPrintingMixin, SettingsMixin, InvenTreePlugin):
             'description': _('Port of phomemo print server'),
             'default': '9100',
         },
-        'THRESHOLD': {
-            'name': _('Threshold'),
-            'description': _('Threshold for B/W conversion (0-255)'),
-            'validator': [int, MinValueValidator(0), MaxValueValidator(255)],
-            'default': 200,
-        },
     }
 
     def print_label(self, **kwargs):
@@ -45,28 +40,14 @@ class PhomemoLabelPlugin(LabelPrintingMixin, SettingsMixin, InvenTreePlugin):
         # Read settings
         ip_address = self.get_setting('IP_ADDRESS')
         port = int(self.get_setting('PORT'))
-        threshold = self.get_setting('THRESHOLD')
+        label_data = kwargs['label_instance']
-        label_image = kwargs['png_file']
-
-        # Extract width (x) and height (y) information.
-        width = kwargs['width']
-        height = kwargs['height']
-
-        # convert image to B/W
-        fn = lambda x: 255 if x > threshold else 0
-        label_image = label_image.convert('L').point(fn, mode='1')
-
-        ##### Convert to phomemo
-        img_byte_arr = io.BytesIO()
-        label_image.save(img_byte_arr, format='PNG')
-        img_byte_arr = img_byte_arr.getvalue()
 
         # 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.send(img_byte_arr)
+            json.dump(label_data, print_socket)
             print_socket.close()
         except Exception as error:
             raise ConnectionError('Error connecting to printer server: ' + str(error))

inventree_phomemo/server.py

@@ -11,7 +11,7 @@ s.listen(1)
 while True:
     conn, addr = s.accept()
     print(addr)
-    printer = open('test.png', 'wb')
+    printer = open('test.json', 'w')
     while True:
         data = conn.recv(91000)
         print('data received')