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diff --git a/sleekxmpp/plugins/xep_0323/device.py b/sleekxmpp/plugins/xep_0323/device.py
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-"""
- SleekXMPP: The Sleek XMPP Library
- Implementation of xeps for Internet of Things
- http://wiki.xmpp.org/web/Tech_pages/IoT_systems
- Copyright (C) 2013 Sustainable Innovation, Joachim.lindborg@sust.se, bjorn.westrom@consoden.se
- This file is part of SleekXMPP.
-
- See the file LICENSE for copying permission.
-"""
-
-import datetime
-import logging
-
-class Device(object):
- """
- Example implementation of a device readout object.
- Is registered in the XEP_0323.register_node call
- The device object may be any custom implementation to support
- specific devices, but it must implement the functions:
- has_field
- request_fields
- """
-
- def __init__(self, nodeId, fields={}):
- self.nodeId = nodeId
- self.fields = fields # see fields described below
- # {'type':'numeric',
- # 'name':'myname',
- # 'value': 42,
- # 'unit':'Z'}];
- self.timestamp_data = {}
- self.momentary_data = {}
- self.momentary_timestamp = ""
- logging.debug("Device object started nodeId %s",nodeId)
-
- def has_field(self, field):
- """
- Returns true if the supplied field name exists in this device.
-
- Arguments:
- field -- The field name
- """
- if field in self.fields.keys():
- return True;
- return False;
-
- def refresh(self, fields):
- """
- override method to do the refresh work
- refresh values from hardware or other
- """
- pass
-
-
- def request_fields(self, fields, flags, session, callback):
- """
- Starts a data readout. Verifies the requested fields,
- refreshes the data (if needed) and calls the callback
- with requested data.
-
-
- Arguments:
- fields -- List of field names to readout
- flags -- [optional] data classifier flags for the field, e.g. momentary
- Formatted as a dictionary like { "flag name": "flag value" ... }
- session -- Session id, only used in the callback as identifier
- callback -- Callback function to call when data is available.
-
- The callback function must support the following arguments:
-
- session -- Session id, as supplied in the request_fields call
- nodeId -- Identifier for this device
- result -- The current result status of the readout. Valid values are:
- "error" - Readout failed.
- "fields" - Contains readout data.
- "done" - Indicates that the readout is complete. May contain
- readout data.
- timestamp_block -- [optional] Only applies when result != "error"
- The readout data. Structured as a dictionary:
- {
- timestamp: timestamp for this datablock,
- fields: list of field dictionary (one per readout field).
- readout field dictionary format:
- {
- type: The field type (numeric, boolean, dateTime, timeSpan, string, enum)
- name: The field name
- value: The field value
- unit: The unit of the field. Only applies to type numeric.
- dataType: The datatype of the field. Only applies to type enum.
- flags: [optional] data classifier flags for the field, e.g. momentary
- Formatted as a dictionary like { "flag name": "flag value" ... }
- }
- }
- error_msg -- [optional] Only applies when result == "error".
- Error details when a request failed.
-
- """
- logging.debug("request_fields called looking for fields %s",fields)
- if len(fields) > 0:
- # Check availiability
- for f in fields:
- if f not in self.fields.keys():
- self._send_reject(session, callback)
- return False;
- else:
- # Request all fields
- fields = self.fields.keys();
-
-
- # Refresh data from device
- # ...
- logging.debug("about to refresh device fields %s",fields)
- self.refresh(fields)
-
- if "momentary" in flags and flags['momentary'] == "true" or \
- "all" in flags and flags['all'] == "true":
- ts_block = {};
- timestamp = "";
-
- if len(self.momentary_timestamp) > 0:
- timestamp = self.momentary_timestamp;
- else:
- timestamp = self._get_timestamp();
-
- field_block = [];
- for f in self.momentary_data:
- if f in fields:
- field_block.append({"name": f,
- "type": self.fields[f]["type"],
- "unit": self.fields[f]["unit"],
- "dataType": self.fields[f]["dataType"],
- "value": self.momentary_data[f]["value"],
- "flags": self.momentary_data[f]["flags"]});
- ts_block["timestamp"] = timestamp;
- ts_block["fields"] = field_block;
-
- callback(session, result="done", nodeId=self.nodeId, timestamp_block=ts_block);
- return
-
- from_flag = self._datetime_flag_parser(flags, 'from')
- to_flag = self._datetime_flag_parser(flags, 'to')
-
- for ts in sorted(self.timestamp_data.keys()):
- tsdt = datetime.datetime.strptime(ts, "%Y-%m-%dT%H:%M:%S")
- if not from_flag is None:
- if tsdt < from_flag:
- #print (str(tsdt) + " < " + str(from_flag))
- continue
- if not to_flag is None:
- if tsdt > to_flag:
- #print (str(tsdt) + " > " + str(to_flag))
- continue
-
- ts_block = {};
- field_block = [];
-
- for f in self.timestamp_data[ts]:
- if f in fields:
- field_block.append({"name": f,
- "type": self.fields[f]["type"],
- "unit": self.fields[f]["unit"],
- "dataType": self.fields[f]["dataType"],
- "value": self.timestamp_data[ts][f]["value"],
- "flags": self.timestamp_data[ts][f]["flags"]});
-
- ts_block["timestamp"] = ts;
- ts_block["fields"] = field_block;
- callback(session, result="fields", nodeId=self.nodeId, timestamp_block=ts_block);
- callback(session, result="done", nodeId=self.nodeId, timestamp_block=None);
-
- def _datetime_flag_parser(self, flags, flagname):
- if not flagname in flags:
- return None
-
- dt = None
- try:
- dt = datetime.datetime.strptime(flags[flagname], "%Y-%m-%dT%H:%M:%S")
- except ValueError:
- # Badly formatted datetime, ignore it
- pass
- return dt
-
-
- def _get_timestamp(self):
- """
- Generates a properly formatted timestamp of current time
- """
- return datetime.datetime.now().replace(microsecond=0).isoformat()
-
- def _send_reject(self, session, callback):
- """
- Sends a reject to the caller
-
- Arguments:
- session -- Session id, see definition in request_fields function
- callback -- Callback function, see definition in request_fields function
- """
- callback(session, result="error", nodeId=self.nodeId, timestamp_block=None, error_msg="Reject");
-
- def _add_field(self, name, typename, unit=None, dataType=None):
- """
- Adds a field to the device
-
- Arguments:
- name -- Name of the field
- typename -- Type of the field (numeric, boolean, dateTime, timeSpan, string, enum)
- unit -- [optional] only applies to "numeric". Unit for the field.
- dataType -- [optional] only applies to "enum". Datatype for the field.
- """
- self.fields[name] = {"type": typename, "unit": unit, "dataType": dataType};
-
- def _add_field_timestamp_data(self, name, timestamp, value, flags=None):
- """
- Adds timestamped data to a field
-
- Arguments:
- name -- Name of the field
- timestamp -- Timestamp for the data (string)
- value -- Field value at the timestamp
- flags -- [optional] data classifier flags for the field, e.g. momentary
- Formatted as a dictionary like { "flag name": "flag value" ... }
- """
- if not name in self.fields.keys():
- return False;
- if not timestamp in self.timestamp_data:
- self.timestamp_data[timestamp] = {};
-
- self.timestamp_data[timestamp][name] = {"value": value, "flags": flags};
- return True;
-
- def _add_field_momentary_data(self, name, value, flags=None):
- """
- Sets momentary data to a field
-
- Arguments:
- name -- Name of the field
- value -- Field value at the timestamp
- flags -- [optional] data classifier flags for the field, e.g. momentary
- Formatted as a dictionary like { "flag name": "flag value" ... }
- """
- if name not in self.fields:
- return False;
- if flags is None:
- flags = {};
-
- flags["momentary"] = "true"
- self.momentary_data[name] = {"value": value, "flags": flags};
- return True;
-
- def _set_momentary_timestamp(self, timestamp):
- """
- This function is only for unit testing to produce predictable results.
- """
- self.momentary_timestamp = timestamp;
-