issue-51-telegram work in progress

dsmr_parser/objects.py

@@ -23,12 +23,17 @@ class Telegram(object):
     def __init__(self):
         self._telegram_data = defaultdict(list)
         self._mbus_channel_devices = {}
+        self._item_names = []
 
     def add(self, obis_reference, dsmr_object):
         self._telegram_data[obis_reference].append(dsmr_object)
 
         # Update name mapping used to get value by attribute. Example: telegram.P1_MESSAGE_HEADER
-        setattr(self, obis_name_mapping.EN[obis_reference], dsmr_object)
+        # Also keep track of the added names internally
+        obis_name = obis_name_mapping.EN[obis_reference]
+        setattr(self, obis_name, dsmr_object)
+        if obis_name not in self._item_names:  # TODO solve issue with repeating obis references
+            self._item_names.append(obis_name)
 
         # Group Mbus related values into a MbusDevice object.
         # TODO MaxDemandParser (BELGIUM_MAXIMUM_DEMAND_13_MONTHS) returns a list
@@ -63,26 +68,26 @@ class Telegram(object):
 
     def __getitem__(self, obis_reference):
         """
-        Get value by key. Example: telegram[obis_references.P1_MESSAGE_HEADER]
+        Deprecated method to get obis_reference by key. Exists for backwards compatibility
 
-        For Mbus devices like gas and water meters, it's better to use get_mbus_devices and get_mbus_device_by_channel.
+        Example: telegram[obis_references.P1_MESSAGE_HEADER]
-        This key approach will only fetch the first found value and therefor might not be accurate.
         """
         try:
+            # TODO use _telegram_data here or else TelegramParserFluviusTest.test_parse breaks
             return self._telegram_data[obis_reference][0]
+            # obis_name = obis_name_mapping.EN[obis_reference]
+            # return getattr(self, obis_name)
         except IndexError:
             # The index error is an internal detail. The KeyError is expected as a user.
             raise KeyError
 
     def __len__(self):
-        return len(self._telegram_data)
+        return len(self._item_names)
 
     def __iter__(self):
-        for obis_reference, values in self._telegram_data.items():
+        for attr in self._item_names:
-            reverse_obis_name = obis_name_mapping.EN[obis_reference]
+            value = getattr(self, attr)
-            value = values[0]  # TODO might be considered legacy behavior?
+            yield attr, value
-
-            yield reverse_obis_name, value
 
     def __str__(self):
         output = ""
@@ -91,7 +96,13 @@ class Telegram(object):
         return output
 
     def to_json(self):
-        return json.dumps(dict([[attr, json.loads(value.to_json())] for attr, value in self]))
+        telegram_data = {obis_name: json.loads(value.to_json()) for obis_name, value in self}
+        telegram_data['MBUS_DEVICES'] = [
+            json.loads(mbus_device.to_json())
+            for mbus_device in self._mbus_channel_devices.values()
+        ]
+
+        return json.dumps(telegram_data)
 
 
 class DSMRObject(object):
@@ -319,10 +330,31 @@ class MbusDevice:
 
     def __init__(self, channel_id):
         self.channel_id = channel_id
-        self._telegram_data = {}
+        self._item_names = []
 
     def add(self, obis_reference, dsmr_object):
-        self._telegram_data[obis_reference] = dsmr_object
+        # Update name mapping used to get value by attribute. Example: telegram.P1_MESSAGE_HEADER
+        # Also keep track of the added names internally
+        obis_name = obis_name_mapping.EN[obis_reference]
+        setattr(self, obis_name, dsmr_object)
+        self._item_names.append(obis_name)
 
-        # Update name mapping used to get value by attribute. Example: device.HOURLY_GAS_METER_READING
+    def __len__(self):
-        setattr(self, obis_name_mapping.EN[obis_reference], dsmr_object)
+        return len(self._item_names)
+
+    def __iter__(self):
+        for attr in self._item_names:
+            value = getattr(self, attr)
+            yield attr, value
+
+    def __str__(self):
+        output = ""
+        for attr, value in self:
+            output += "{}: \t {}\n".format(attr, str(value))
+        return output
+
+    def to_json(self):
+        data = {obis_name: json.loads(value.to_json()) for obis_name, value in self}
+        data['CHANNEL_ID'] = self.channel_id
+
+        return json.dumps(data)

test/objects/test_mbusdevice.py

@@ -0,0 +1,50 @@
+from decimal import Decimal
+
+import json
+import unittest
+
+from dsmr_parser import telegram_specifications, obis_references
+from dsmr_parser.objects import MbusDevice
+
+
+class MbusDeviceTest(unittest.TestCase):
+
+    def setUp(self):
+        v5_objects = telegram_specifications.V5['objects']
+
+        device_type_parser = v5_objects[obis_references.DEVICE_TYPE]
+        device_type = device_type_parser.parse('0-2:24.1.0(003)\r\n')
+
+        equipment_parser = v5_objects[obis_references.EQUIPMENT_IDENTIFIER_GAS]
+        equipment = equipment_parser.parse('0-2:96.1.0(4730303339303031393336393930363139)\r\n')
+
+        gas_reading_parser = v5_objects[obis_references.HOURLY_GAS_METER_READING]
+        gas_reading = gas_reading_parser.parse('0-2:24.2.1(200426223001S)(00246.138*m3)\r\n')
+
+        mbus_device = MbusDevice(channel_id=1)
+        mbus_device.add(obis_references.DEVICE_TYPE, device_type)
+        mbus_device.add(obis_references.EQUIPMENT_IDENTIFIER_GAS, equipment)
+        mbus_device.add(obis_references.HOURLY_GAS_METER_READING, gas_reading)
+
+        self.mbus_device = mbus_device
+
+    def test_attributes(self):
+        self.assertEqual(self.mbus_device.DEVICE_TYPE.value, 3)
+        self.assertEqual(self.mbus_device.DEVICE_TYPE.unit, None)
+
+        self.assertEqual(self.mbus_device.EQUIPMENT_IDENTIFIER_GAS.value,
+                         '4730303339303031393336393930363139')
+        self.assertEqual(self.mbus_device.EQUIPMENT_IDENTIFIER_GAS.unit, None)
+
+        self.assertEqual(self.mbus_device.HOURLY_GAS_METER_READING.value, Decimal('246.138'))
+        self.assertEqual(self.mbus_device.HOURLY_GAS_METER_READING.unit, 'm3')
+
+    def test_to_json(self):
+        self.assertEqual(
+            json.loads(self.mbus_device.to_json()),
+            {
+                'CHANNEL_ID': 1,
+                'DEVICE_TYPE': {'value': 3, 'unit': None},
+                'EQUIPMENT_IDENTIFIER_GAS': {'value': '4730303339303031393336393930363139', 'unit': None},
+                'HOURLY_GAS_METER_READING': {'datetime': '2020-04-26T22:30:01+02:00', 'value': 246.138, 'unit': 'm3'}}
+        )

test/objects/test_telegram.py

@@ -1,3 +1,4 @@
+import json
 import unittest
 import datetime
 import pytz
@@ -324,17 +325,17 @@ class TelegramTest(unittest.TestCase):
         parser = TelegramParser(telegram_specifications.V5)
         telegram = parser.parse(TELEGRAM_V5_TWO_MBUS)
 
-        self.assertEqual(len(telegram), 35)
+        self.assertEqual(len(telegram._item_names), 35)
 
     def test_iter(self):
         parser = TelegramParser(telegram_specifications.V5)
         telegram = parser.parse(TELEGRAM_V5)
 
-        for obis_reference, dsmr_object in telegram:
+        for obis_name, dsmr_object in telegram:
             break
 
-        # Verify that the iterator works for at least on evalue
+        # Verify that the iterator works for at least one value
-        self.assertEqual(obis_reference, obis_name_mapping.EN[obis_references.P1_MESSAGE_HEADER])
+        self.assertEqual(obis_name, obis_name_mapping.EN[obis_references.P1_MESSAGE_HEADER])
         self.assertEqual(dsmr_object.value, '50')
 
     def test_get_mbus_devices(self):
@@ -378,3 +379,68 @@ class TelegramTest(unittest.TestCase):
         # Because of a bug related to incorrect use of defaultdict,
         # test again for unwanted side effects
         self.assertEqual(telegram.get_mbus_devices(), [])
+
+    def test_to_json(self):
+        parser = TelegramParser(telegram_specifications.V5)
+        telegram = parser.parse(TELEGRAM_V5)
+        json_data = json.loads(telegram.to_json())
+
+        self.assertEqual(
+            json_data,
+            {'CURRENT_ELECTRICITY_DELIVERY': {'unit': 'kW', 'value': 0.0},
+             'CURRENT_ELECTRICITY_USAGE': {'unit': 'kW', 'value': 0.244},
+             'DEVICE_TYPE': {'unit': None, 'value': 3},
+             'ELECTRICITY_ACTIVE_TARIFF': {'unit': None, 'value': '0002'},
+             'ELECTRICITY_DELIVERED_TARIFF_1': {'unit': 'kWh', 'value': 2.444},
+             'ELECTRICITY_DELIVERED_TARIFF_2': {'unit': 'kWh', 'value': 0.0},
+             'ELECTRICITY_USED_TARIFF_1': {'unit': 'kWh', 'value': 4.426},
+             'ELECTRICITY_USED_TARIFF_2': {'unit': 'kWh', 'value': 2.399},
+             'EQUIPMENT_IDENTIFIER': {'unit': None,
+                                      'value': '4B384547303034303436333935353037'},
+             'EQUIPMENT_IDENTIFIER_GAS': {'unit': None, 'value': None},
+             'HOURLY_GAS_METER_READING': {'datetime': '2017-01-02T16:10:05+01:00',
+                                          'unit': 'm3',
+                                          'value': 0.107},
+             'INSTANTANEOUS_ACTIVE_POWER_L1_NEGATIVE': {'unit': 'kW', 'value': 0.0},
+             'INSTANTANEOUS_ACTIVE_POWER_L1_POSITIVE': {'unit': 'kW', 'value': 0.07},
+             'INSTANTANEOUS_ACTIVE_POWER_L2_NEGATIVE': {'unit': 'kW', 'value': 0.0},
+             'INSTANTANEOUS_ACTIVE_POWER_L2_POSITIVE': {'unit': 'kW', 'value': 0.032},
+             'INSTANTANEOUS_ACTIVE_POWER_L3_NEGATIVE': {'unit': 'kW', 'value': 0.0},
+             'INSTANTANEOUS_ACTIVE_POWER_L3_POSITIVE': {'unit': 'kW', 'value': 0.142},
+             'INSTANTANEOUS_CURRENT_L1': {'unit': 'A', 'value': 0.48},
+             'INSTANTANEOUS_CURRENT_L2': {'unit': 'A', 'value': 0.44},
+             'INSTANTANEOUS_CURRENT_L3': {'unit': 'A', 'value': 0.86},
+             'INSTANTANEOUS_VOLTAGE_L1': {'unit': 'V', 'value': 230.0},
+             'INSTANTANEOUS_VOLTAGE_L2': {'unit': 'V', 'value': 230.0},
+             'INSTANTANEOUS_VOLTAGE_L3': {'unit': 'V', 'value': 229.0},
+             'LONG_POWER_FAILURE_COUNT': {'unit': None, 'value': 0},
+             'MBUS_DEVICES': [{'CHANNEL_ID': 1,
+                               'DEVICE_TYPE': {'unit': None, 'value': 3},
+                               'EQUIPMENT_IDENTIFIER_GAS': {'unit': None,
+                                                            'value': '3232323241424344313233343536373839'},
+                               'HOURLY_GAS_METER_READING': {'datetime': '2017-01-02T16:10:05+01:00',
+                                                            'unit': 'm3',
+                                                            'value': 0.107}},
+                              {'CHANNEL_ID': 2,
+                               'DEVICE_TYPE': {'unit': None, 'value': 3},
+                               'EQUIPMENT_IDENTIFIER_GAS': {'unit': None, 'value': None}}],
+             'P1_MESSAGE_HEADER': {'unit': None, 'value': '50'},
+             'P1_MESSAGE_TIMESTAMP': {'unit': None, 'value': '2017-01-02T19:20:02+01:00'},
+             'POWER_EVENT_FAILURE_LOG': {'buffer': [],
+                                         'buffer_length': 0,
+                                         'buffer_type': '0-0:96.7.19'},
+             'SHORT_POWER_FAILURE_COUNT': {'unit': None, 'value': 13},
+             'TEXT_MESSAGE': {'unit': None, 'value': None},
+             'VOLTAGE_SAG_L1_COUNT': {'unit': None, 'value': 0},
+             'VOLTAGE_SAG_L2_COUNT': {'unit': None, 'value': 0},
+             'VOLTAGE_SAG_L3_COUNT': {'unit': None, 'value': 0},
+             'VOLTAGE_SWELL_L1_COUNT': {'unit': None, 'value': 0},
+             'VOLTAGE_SWELL_L2_COUNT': {'unit': None, 'value': 0},
+             'VOLTAGE_SWELL_L3_COUNT': {'unit': None, 'value': 0}}
+        )
+
+    def test_getitem(self):
+        parser = TelegramParser(telegram_specifications.V5)
+        telegram = parser.parse(TELEGRAM_V5)
+
+        self.assertEqual(telegram[obis_references.P1_MESSAGE_HEADER].value, '50')