Initial commit: Hw packages

odoo-bringout-oca-ocb-hw_drivers/hw_drivers/iot_handlers/interfaces/PrinterInterface_L.py

@@ -0,0 +1,69 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from cups import Connection as cups_connection
+from re import sub
+from threading import Lock
+
+from odoo.addons.hw_drivers.interface import Interface
+
+conn = cups_connection()
+PPDs = conn.getPPDs()
+cups_lock = Lock()  # We can only make one call to Cups at a time
+
+class PrinterInterface(Interface):
+    _loop_delay = 120
+    connection_type = 'printer'
+    printer_devices = {}
+
+    def get_devices(self):
+        discovered_devices = {}
+        with cups_lock:
+            printers = conn.getPrinters()
+            devices = conn.getDevices()
+            for printer_name, printer in printers.items():
+                path = printer.get('device-uri', False)
+                if printer_name != self.get_identifier(path):
+                    printer.update({'supported': True}) # these printers are automatically supported
+                    device_class = 'network'
+                    if 'usb' in printer.get('device-uri'):
+                        device_class = 'direct'
+                    printer.update({'device-class': device_class})
+                    printer.update({'device-make-and-model': printer_name}) # give name setted in Cups
+                    printer.update({'device-id': ''})
+                    devices.update({printer_name: printer})
+        for path, device in devices.items():
+            identifier = self.get_identifier(path)
+            device.update({'identifier': identifier})
+            device.update({'url': path})
+            device.update({'disconnect_counter': 0})
+            discovered_devices.update({identifier: device})
+        self.printer_devices.update(discovered_devices)
+        # Deal with devices which are on the list but were not found during this call of "get_devices"
+        # If they aren't detected 3 times consecutively, remove them from the list of available devices
+        for device in list(self.printer_devices):
+            if not discovered_devices.get(device):
+                disconnect_counter = self.printer_devices.get(device).get('disconnect_counter')
+                if disconnect_counter >= 2:
+                    self.printer_devices.pop(device, None)
+                else:
+                    self.printer_devices[device].update({'disconnect_counter': disconnect_counter + 1})
+        return dict(self.printer_devices)
+
+    def get_identifier(self, path):
+        """
+        Necessary because the path is not always a valid Cups identifier,
+        as it may contain characters typically found in URLs or paths.
+
+          - Removes characters: ':', '/', '.', '\', and space.
+          - Removes the exact strings: "uuid=" and "serial=".
+
+        Example 1:
+            Input: "ipp://printers/printer1:1234/abcd"
+            Output: "ippprintersprinter11234abcd"
+
+        Example 2:
+            Input: "uuid=1234-5678-90ab-cdef"
+            Output: "1234-5678-90ab-cdef
+        """
+        return sub(r'[:\/\.\\ ]|(uuid=)|(serial=)', '', path)