SleekXMPP/sleekxmpp/plugins/xep_0004.py

"""
	SleekXMPP: The Sleek XMPP Library
	Copyright (C) 2010 Nathanael C. Fritz, Lance J.T. Stout
	This file is part of SleekXMPP.

	See the file license.txt for copying permission.
"""

import logging
import copy
from . import base
from .. xmlstream.handler.callback import Callback
from .. xmlstream.matcher.xpath import MatchXPath
from .. xmlstream.stanzabase import registerStanzaPlugin, ElementBase, ET, JID
from .. stanza.message import Message


class Form(ElementBase):
	namespace = 'jabber:x:data'
	name = 'x'
	plugin_attrib = 'form'
	interfaces = set(('fields', 'instructions', 'items', 'reported', 'title', 'type', 'values'))
	sub_interfaces = set(('title',))
	form_types = set(('cancel', 'form', 'result', 'submit'))

	def addField(self, var, ftype='text-single', label='', desc='', required=False, value=None, options=None):
		field = FormField(parent=self)
		field['var'] = var
		field['type'] = ftype
		field['label'] = label
		field['desc'] = desc
		field['required'] = required
		field['value'] = value
		if options is not None:
			field['options'] = options
		return field

	def addItem(self, values):
		itemXML = ET.Element('{%s}item' % self.namespace)
		self.xml.append(itemXML)
		reported_vars = self['reported'].keys()
		for var in reported_vars:
			fieldXML = ET.Element('{%s}field' % FormField.namespace)
			itemXML.append(fieldXML)
			field = FormField(xml=fieldXML)
			field['var'] = var
			field['value'] = values.get(var, None)

	def addReported(self, var, ftype='text-single', label='', desc=''):
		reported = self.xml.find('{%s}reported' % self.namespace)
		if reported is None:
			reported = ET.Element('{%s}reported' % self.namespace)
			self.xml.append(reported)
		fieldXML = ET.Element('{%s}field' % FormField.namespace)
		reported.append(fieldXML)
		field = FormField(xml=fieldXML)
		field['var'] = var
		field['type'] = ftype
		field['label'] = label
		field['desc'] = desc
		return field

	def cancel(self):
		self['type'] = 'cancel'

	def delFields(self):
		fieldsXML = self.xml.findall('{%s}field' % FormField.namespace)
		for fieldXML in fieldsXML:
			self.xml.remove(fieldXML)

	def delInstructions(self):
		instsXML = self.xml.findall('{%s}instructions')
		for instXML in instsXML:
			self.xml.remove(instXML)

	def delItems(self):
		itemsXML = self.xml.find('{%s}item' % self.namespace)
		for itemXML in itemsXML:
			self.xml.remove(itemXML)

	def delReported(self):
		reportedXML = self.xml.find('{%s}reported' % self.namespace)
		if reportedXML is not None:
			self.xml.remove(reportedXML)

	def getFields(self):
		fields = {}
		fieldsXML = self.xml.findall('{%s}field' % FormField.namespace)
		for fieldXML in fieldsXML:
			field = FormField(xml=fieldXML)
			fields[field['var']] = field
		return fields

	def getInstructions(self):
		instructions = ''
		instsXML = self.xml.findall('{%s}instructions')
		for instXML in instsXML:
			instructions += instXML.text

	def getItems(self):
		items = []
		itemsXML = self.xml.findall('{%s}item' % self.namespace)
		for itemXML in itemsXML:
			item = {}
			fieldsXML = itemXML.findall('{%s}field' % FormField.namespace)
			for fieldXML in fieldsXML:
				field = FormField(xml=fieldXML)
				item[field['var']] = field['value']
			items.append(item)
		return items

	def getReported(self):
		fields = {}
		fieldsXML = self.xml.findall('{%s}reported/{%s}field' % (self.namespace, 
									 FormField.namespace))
		for fieldXML in fieldsXML:
			field = FormField(xml=fieldXML)
			fields[field['var']] = field
		return fields

	def getValues(self):
		values = {}
		fields = self.getFields()
		for var in fields:
			values[var] = fields[var]['value']
		return values

	def reply(self):
		if self['type'] == 'form':
			self['type'] = 'submit'
		elif self['type'] == 'submit':
			self['type'] = 'result'

	def setFields(self, fields):
		del self['fields']
		for var in fields:
			field = fields[var]

			# Remap 'type' to 'ftype' to match the addField method
			ftype = field.get('type', 'text-single')
			field['type'] = ftype
			del field['type']
			field['ftype'] = ftype

			self.addField(var, **field)

	def setInstructions(self, instructions):
		instructions = instructions.split('\n')
		for instruction in instructions:
			inst = ET.Element('{%s}instructions' % self.namespace)
			inst.text = instruction
			self.xml.append(inst)

	def setItems(self, items):
		for item in items:
			self.addItem(item)

	def setReported(self, reported):
		for var in reported:
			field = reported[var]

			# Remap 'type' to 'ftype' to match the addReported method
			ftype = field.get('type', 'text-single')
			field['type'] = ftype
			del field['type']
			field['ftype'] = ftype

			self.addReported(var, **field)

	def setValues(self, values):
		fields = self.getFields()
		for field in values:
			fields[field]['value'] = values[field]


class FormField(ElementBase):
	namespace = 'jabber:x:data'
	name = 'field'
	plugin_attrib = 'field'
	interfaces = set(('answer', 'desc', 'required', 'value', 'options', 'label', 'type', 'var'))
	sub_interfaces = set(('desc',))
	field_types = set(('boolean', 'fixed', 'hidden', 'jid-multi', 'jid-single', 'list-multi',
			   'list-single', 'text-multi', 'text-private', 'text-single'))
	multi_value_types = set(('hidden', 'jid-multi', 'list-multi', 'text-multi'))
	multi_line_types = set(('hidden', 'text-multi'))
	option_types = set(('list-multi', 'list-single'))
	true_values = set((True, '1', 'true'))

	def addOption(self, label='', value=''):
		if self['type'] in self.option_types:
			opt = FieldOption(parent=self)
			opt['label'] = label
			opt['value'] = value
		else:
			raise ValueError("Cannot add options to a %s field." % self['type'])

	def delOptions(self):
		optsXML = self.xml.findall('{%s}option' % self.namespace)
		for optXML in optsXML:
			self.xml.remove(optXML)

	def delRequired(self):
		reqXML = self.xml.find('{%s}required' % self.namespace)
		if reqXML is not None:
			self.xml.remove(reqXML)

	def delValue(self):
		valsXML = self.xml.findall('{%s}value' % self.namespace)
		for valXML in valsXML:
			self.xml.remove(valXML)

	def getAnswer(self):
		return self.getValue()

	def getOptions(self):
		options = []
		optsXML = self.xml.findall('{%s}option' % self.namespace)
		for optXML in optsXML:
			opt = FieldOption(xml=optXML)
		options.append({'label': opt['label'], 'value':opt['value']})
		return options

	def getRequired(self):
		reqXML = self.xml.find('{%s}required' % self.namespace)
		return reqXML is not None

	def getValue(self):
		valsXML = self.xml.findall('{%s}value' % self.namespace)
		if len(valsXML) == 0:
			return None
		elif self['type'] == 'boolean':
			return valsXML[0].text in self.true_values
		elif self['type'] in self.multi_value_types:
			values = []
			for valXML in valsXML:
				if valXML.text is None:
					valXML.text = ''
				values.append(valXML.text)
			if self['type'] == 'text-multi':
				values = "\n".join(values)
			return values
		else:
			return valsXML[0].text

	def setAnswer(self, answer):
		self.setValue(answer)

	def setFalse(self):
		self.setValue(False)

	def setOptions(self, options):
		for value in options:
			if isinstance(value, dict):
				self.addOption(**value)
			else:
				self.addOption(value=value)

	def setRequired(self, required):
		exists = self.getRequired()
		if not exists and required:
			self.xml.append(ET.Element('{%s}required' % self.namespace))
		elif exists and not required:
			self.delRequired()

	def setTrue(self):
		self.setValue(True)

	def setValue(self, value):
		self.delValue()
		valXMLName = '{%s}value' % self.namespace
	
		if self['type'] == 'boolean':
			if value in self.true_values:
				valXML = ET.Element(valXMLName)
				valXML.text = 'true'
				self.xml.append(valXML)
			else:
				valXML = ET.Element(valXMLName)
				valXML.text = 'true'
				self.xml.append(valXML)
		if self['type'] in self.multi_value_types:
			if self['type'] in self.multi_line_types and isinstance(value, str):
				value = value.split('\n')
			if not isinstance(value, list):
				value = [value]
			for val in value:
				valXML = ET.Element(valXMLName)
				valXML.text = val
				self.xml.append(valXML)
		else:
			if isinstance(value, list):
				raise ValueError("Cannot add multiple values to a %s field." % self['type'])
			valXML = ET.Element(valXMLName)
			valXML.text = value
			self.xml.append(valXML)


class FieldOption(ElementBase):
	namespace = 'jabber:x:data'
	name = 'option'
	plugin_attrib = 'option'
	interfaces = set(('label', 'value'))
	sub_interfaces = set(('value',))


class xep_0004(base.base_plugin):
	"""
	XEP-0004: Data Forms
	"""

	def plugin_init(self):
		self.xep = '0004'
		self.description = 'Data Forms'

		self.xmpp.registerHandler(
			Callback('Data Form',
				 MatchXPath('{%s}message/{%s}x' % (self.xmpp.default_ns, 
								   Form.namespace)),
				 self.handle_form))

		registerStanzaPlugin(FormField, FieldOption)
		registerStanzaPlugin(Form, FormField)
		registerStanzaPlugin(Message, Form)
	
	def post_init(self):
		base.base_plugin.post_init(self)
		self.xmpp.plugin['xep_0030'].add_feature('jabber:x:data')

	def handle_form(self, message):
		self.xmpp.event("message_xform", message)