annotate idavoll/generic_backend.py @ 111:30c580286d27

Add documentation.
author Ralph Meijer <ralphm@ik.nu>
date Fri, 08 Apr 2005 16:30:26 +0000
parents d252d793f0ed
children 7d83fe9bdb65
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107
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1 import sha
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2 import time
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3 from twisted.words.protocols.jabber import jid
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4 from twisted.application import service
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5 from twisted.xish import utility
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6 from twisted.internet import defer
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7 from zope.interface import implements
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8 import backend
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9
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10 def _get_affiliation(node, entity):
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11 d = node.get_affiliation(entity)
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12 d.addCallback(lambda affiliation: (node, affiliation))
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13 return d
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14
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15 class BackendService(service.MultiService, utility.EventDispatcher):
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16
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17 implements(backend.IBackendService)
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18
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19 options = {"pubsub#persist_items":
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20 {"type": "boolean",
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21 "label": "Persist items to storage"},
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22 "pubsub#deliver_payloads":
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23 {"type": "boolean",
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24 "label": "Deliver payloads with event notifications"},
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25 }
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26
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27 default_config = {"pubsub#persist_items": True,
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28 "pubsub#deliver_payloads": True,
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29 }
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30
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31 def __init__(self, storage):
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32 service.MultiService.__init__(self)
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33 utility.EventDispatcher.__init__(self)
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34 self.storage = storage
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35
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36 def supports_publisher_affiliation(self):
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37 return True
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38
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39 def supports_outcast_affiliation(self):
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40 return True
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41
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42 def supports_persistent_items(self):
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43 return True
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44
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45 def get_node_type(self, node_id):
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46 d = self.storage.get_node(node_id)
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47 d.addCallback(lambda node: node.get_type())
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48 return d
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49
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50 def get_nodes(self):
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51 return self.storage.get_node_ids()
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52
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53 def get_node_meta_data(self, node_id):
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54 d = self.storage.get_node(node_id)
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55 d.addCallback(lambda node: node.get_meta_data())
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56 d.addCallback(self._make_meta_data)
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57 return d
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58
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59 def _make_meta_data(self, meta_data):
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60 options = []
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61 for key, value in meta_data.iteritems():
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62 if self.options.has_key(key):
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63 option = {"var": key}
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64 option.update(self.options[key])
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65 option["value"] = value
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66 options.append(option)
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67
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68 return options
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69
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70 class PublishService(service.Service):
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71
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72 implements(backend.IPublishService)
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73
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74 def publish(self, node_id, items, requestor):
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75 d = self.parent.storage.get_node(node_id)
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76 d.addCallback(_get_affiliation, requestor)
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77 d.addCallback(self._do_publish, items, requestor)
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78 return d
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79
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80 def _do_publish(self, result, items, requestor):
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81 node, affiliation = result
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82 configuration = node.get_configuration()
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83 persist_items = configuration["pubsub#persist_items"]
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84 deliver_payloads = configuration["pubsub#deliver_payloads"]
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85
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86 if affiliation not in ['owner', 'publisher']:
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87 raise backend.NotAuthorized
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88
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89 if items and not persist_items and not deliver_payloads:
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90 raise backend.NoPayloadAllowed
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91 elif not items and (persist_items or deliver_payloads):
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92 raise backend.PayloadExpected
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93
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94 if persist_items or deliver_payloads:
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95 for item in items:
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96 if not item.getAttribute("id"):
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97 item["id"] = sha.new(str(time.time()) +
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98 requestor.full()).hexdigest()
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99
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100 if persist_items:
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101 d = node.store_items(items, requestor)
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102 else:
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103 d = defer.succeed(None)
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104
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105 d.addCallback(self._do_notify, node.id, items, deliver_payloads)
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106
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107 def _do_notify(self, result, node_id, items, deliver_payloads):
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108 if items and not deliver_payloads:
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109 for item in items:
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110 item.children = []
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111
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112 self.parent.dispatch({ 'items': items, 'node_id': node_id },
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113 '//event/pubsub/notify')
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114
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115 class NotificationService(service.Service):
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116
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117 implements(backend.INotificationService)
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118
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119 def get_notification_list(self, node_id, items):
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120 d = self.parent.storage.get_node(node_id)
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121 d.addCallback(lambda node: node.get_subscribers())
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122 d.addCallback(self._magic_filter, node_id, items)
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123 return d
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124
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125 def _magic_filter(self, subscribers, node_id, items):
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126 list = []
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127 for subscriber in subscribers:
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128 list.append((subscriber, items))
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129 return list
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130
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131 def register_notifier(self, observerfn, *args, **kwargs):
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132 self.parent.addObserver('//event/pubsub/notify', observerfn,
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133 *args, **kwargs)
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134
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135 class SubscriptionService(service.Service):
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136
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137 implements(backend.ISubscriptionService)
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138
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139 def subscribe(self, node_id, subscriber, requestor):
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140 subscriber_entity = subscriber.userhostJID()
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141 if subscriber_entity != requestor:
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142 return defer.fail(backend.NotAuthorized)
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143
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144 d = self.parent.storage.get_node(node_id)
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145 d.addCallback(_get_affiliation, subscriber_entity)
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146 d.addCallback(self._do_subscribe, subscriber)
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147 return d
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148
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149 def _do_subscribe(self, result, subscriber):
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150 node, affiliation = result
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151
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152 if affiliation == 'outcast':
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153 raise backend.NotAuthorized
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154
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155 d = node.add_subscription(subscriber, 'subscribed')
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156 d.addCallback(self._return_subscription, affiliation)
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157 return d
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158
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159 def _return_subscription(self, result, affiliation):
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160 result['affiliation'] = affiliation
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161 return result
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162
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163 def unsubscribe(self, node_id, subscriber, requestor):
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164 if subscriber.userhostJID() != requestor:
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165 raise backend.NotAuthorized
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166
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167 d = self.parent.storage.get_node(node_id)
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168 d.addCallback(lambda node: node.remove_subscription(subscriber))
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169 return d
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170
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171 class NodeCreationService(service.Service):
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172
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173 implements(backend.INodeCreationService)
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174
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175 def supports_instant_nodes(self):
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
176 return True
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
177
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
178 def create_node(self, node_id, requestor):
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
179 if not node_id:
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
180 node_id = 'generic/%s' % sha.new(str(time.time()) +
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
181 requestor.full()).hexdigest()
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
182
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
183 d = self.parent.storage.create_node(node_id, requestor)
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
184 d.addCallback(lambda _: node_id)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
185 return d
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
186
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
187 def get_node_configuration(self, node_id):
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
188 if node_id:
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
189 d = self.parent.storage.get_node(node_id)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
190 d.addCallback(lambda node: node.get_configuration())
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
191 else:
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
192 # XXX: this is disabled in pubsub.py
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
193 d = defer.succeed(self.parent.default_config)
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
194
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
195 d.addCallback(self._make_config)
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
196 return d
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
197
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
198 def _make_config(self, config):
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
199 options = []
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
200 for key, value in self.parent.options.iteritems():
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
201 option = {"var": key}
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
202 option.update(value)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
203 if config.has_key(key):
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
204 option["value"] = config[key]
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
205 options.append(option)
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
206
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
207 return options
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
208
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
209 def set_node_configuration(self, node_id, options, requestor):
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
210 for key, value in options.iteritems():
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
211 if not self.parent.options.has_key(key):
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
212 raise backend.InvalidConfigurationOption
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
213 if self.parent.options[key]["type"] == 'boolean':
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
214 try:
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
215 options[key] = bool(int(value))
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
216 except ValueError:
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
217 raise backend.InvalidConfigurationValue
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
218
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
219 d = self.parent.storage.get_node(node_id)
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
220 d.addCallback(_get_affiliation, requestor)
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
221 d.addCallback(self._do_set_node_configuration, options)
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
222 return d
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
223
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
224 def _do_set_node_configuration(self, result, options):
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Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
225 node, affiliation = result
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
226
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
227 if affiliation != 'owner':
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
228 raise backend.NotAuthorized
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
229
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
230 return node.set_configuration(options)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
231
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
232 class AffiliationsService(service.Service):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
233
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
234 implements(backend.IAffiliationsService)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
235
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
236 def get_affiliations(self, entity):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
237 d1 = self.parent.storage.get_affiliations(entity)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
238 d2 = self.parent.storage.get_subscriptions(entity)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
239 d = defer.DeferredList([d1, d2], fireOnOneErrback=1, consumeErrors=1)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
240 d.addErrback(lambda x: x.value[0])
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
241 d.addCallback(self._affiliations_result, entity)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
242 return d
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
243
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
244 def _affiliations_result(self, result, entity):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
245 affiliations = result[0][1]
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
246 subscriptions = result[1][1]
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
247
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
248 new_affiliations = {}
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
249
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
250 for node, affiliation in affiliations:
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
251 new_affiliations[(node, entity.full())] = {'node': node,
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
252 'jid': entity,
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
253 'affiliation': affiliation,
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
254 'subscription': None
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
255 }
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
256
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
257 for node, subscriber, subscription in subscriptions:
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
258 key = node, subscriber.full()
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
259 if new_affiliations.has_key(key):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
260 new_affiliations[key]['subscription'] = subscription
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
261 else:
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
262 new_affiliations[key] = {'node': node,
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
263 'jid': subscriber,
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
264 'affiliation': None,
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
265 'subscription': subscription}
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
266
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
267 return new_affiliations.values()
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
268
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
269 class ItemRetrievalService(service.Service):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
270
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
271 implements(backend.IItemRetrievalService)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
272
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
273 def get_items(self, node_id, requestor, max_items=None, item_ids=[]):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
274 d = self.parent.storage.get_node(node_id)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
275 d.addCallback(self._is_subscribed, requestor)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
276 d.addCallback(self._do_get_items, max_items, item_ids)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
277 return d
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
278
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
279 def _is_subscribed(self, node, subscriber):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
280 d = node.is_subscribed(subscriber)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
281 d.addCallback(lambda subscribed: (node, subscribed))
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
282 return d
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
283
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
284 def _do_get_items(self, result, max_items, item_ids):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
285 node, subscribed = result
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
286
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
287 if not subscribed:
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
288 raise backend.NotAuthorized
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
289
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
290 if item_ids:
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
291 return node.get_items_by_id(item_ids)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
292 else:
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
293 return node.get_items(max_items)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
294
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
295 class RetractionService(service.Service):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
296
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
297 implements(backend.IRetractionService)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
298
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
299 def retract_item(self, node_id, item_ids, requestor):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
300 d = self.parent.storage.get_node(node_id)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
301 d.addCallback(_get_affiliation, requestor)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
302 d.addCallback(self._do_retract, item_ids)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
303 return d
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
304
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
305 def _do_retract(self, result, item_ids):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
306 node, affiliation = result
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
307 persist_items = node.get_configuration()["pubsub#persist_items"]
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
308
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
309 if affiliation not in ['owner', 'publisher']:
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
310 raise backend.NotAuthorized
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
311
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
312 if not persist_items:
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
313 raise backend.NodeNotPersistent
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
314
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
315 d = node.remove_items(item_ids)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
316 d.addCallback(self._do_notify_retraction, node.id)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
317 return d
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
318
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
319 def _do_notify_retraction(self, result, node_id):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
320 self.parent.dispatch({ 'item_ids': result, 'node_id': node_id },
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
321 '//event/pubsub/retract')
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
322
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
323 def purge_node(self, node_id, requestor):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
324 d = self.parent.storage.get_node(node_id)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
325 d.addCallback(_get_affiliation, requestor)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
326 d.addCallback(self._do_purge)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
327 return d
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
328
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
329 def _do_purge(self, result):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
330 node, affiliation = result
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
331 persist_items = node.get_configuration()["pubsub#persist_items"]
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
332
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
333 if affiliation != 'owner':
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
334 raise backend.NotAuthorized
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
335
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
336 if not persist_items:
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
337 raise backend.NodeNotPersistent
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
338
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
339 d = node.purge()
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
340 d.addCallback(self._do_notify_purge, node.id)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
341 return d
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
342
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
343 def _do_notify_purge(self, result, node_id):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
344 self.parent.dispatch(node_id, '//event/pubsub/purge')
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
345
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
346 class NodeDeletionService(service.Service):
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
347
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
348 implements(backend.INodeDeletionService)
d252d793f0ed Initial revision.
Ralph Meijer <ralphm@ik.nu>
parents:
diff changeset
349
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350 def __init__(self):
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351 self._callback_list = []
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352
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353 def register_pre_delete(self, pre_delete_fn):
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354 self._callback_list.append(pre_delete_fn)
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355
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356 def get_subscribers(self, node_id):
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357 d = self.parent.storage.get_node(node_id)
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358 d.addCallback(lambda node: node.get_subscribers())
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359 return d
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360
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361 def delete_node(self, node_id, requestor):
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362 d = self.parent.storage.get_node(node_id)
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363 d.addCallback(_get_affiliation, requestor)
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364 d.addCallback(self._do_pre_delete)
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365 return d
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366
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367 def _do_pre_delete(self, result):
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368 node, affiliation = result
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369
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370 if affiliation != 'owner':
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371 raise backend.NotAuthorized
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372
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373 d = defer.DeferredList([cb(node_id) for cb in self._callback_list],
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Ralph Meijer <ralphm@ik.nu>
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374 consumeErrors=1)
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Ralph Meijer <ralphm@ik.nu>
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375 d.addCallback(self._do_delete, node.id)
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Ralph Meijer <ralphm@ik.nu>
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376
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Ralph Meijer <ralphm@ik.nu>
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377 def _do_delete(self, result, node_id):
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Ralph Meijer <ralphm@ik.nu>
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378 dl = []
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Ralph Meijer <ralphm@ik.nu>
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379 for succeeded, r in result:
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380 if succeeded and r:
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381 dl.extend(r)
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382
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383 d = self.parent.storage.delete_node(node_id)
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Ralph Meijer <ralphm@ik.nu>
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384 d.addCallback(self._do_notify_delete, dl)
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Ralph Meijer <ralphm@ik.nu>
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385
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Ralph Meijer <ralphm@ik.nu>
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386 return d
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387
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Ralph Meijer <ralphm@ik.nu>
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388 def _do_notify_delete(self, result, dl):
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Ralph Meijer <ralphm@ik.nu>
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389 for d in dl:
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Ralph Meijer <ralphm@ik.nu>
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390 d.callback(None)