add user setting to select a default label printer (#4349) (#4362)

InvenTree/common/models.py

@@ -46,6 +46,7 @@ import InvenTree.ready
 import InvenTree.tasks
 import InvenTree.validators
 import order.validators
+from plugin import registry
 
 logger = logging.getLogger('inventree')
 
@@ -1628,6 +1629,15 @@ class InvenTreeSetting(BaseInvenTreeSetting):
             return False
 
 
+def label_printer_options():
+    """Build a list of available label printer options."""
+    printers = [('', _('No Printer (Export to PDF)'))]
+    label_printer_plugins = registry.with_mixin('labels')
+    if label_printer_plugins:
+        printers.extend([(p.slug, p.name + ' - ' + p.human_name) for p in label_printer_plugins])
+    return printers
+
+
 class InvenTreeUserSetting(BaseInvenTreeSetting):
     """An InvenTreeSetting object with a usercontext."""
 
@@ -1781,6 +1791,13 @@ class InvenTreeUserSetting(BaseInvenTreeSetting):
             'validator': bool,
         },
 
+        "LABEL_DEFAULT_PRINTER": {
+            'name': _('Default label printer'),
+            'description': _('Configure which label printer should be selected by default'),
+            'default': '',
+            'choices': label_printer_options
+        },
+
         "REPORT_INLINE": {
             'name': _('Inline report display'),
             'description': _('Display PDF reports in the browser, instead of downloading as a file'),