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1 import copy |
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2 from zope.interface import implements |
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3 from twisted.internet import defer |
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4 from twisted.words.protocols.jabber import jid |
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5 import storage |
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6 |
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7 default_config = {"pubsub#persist_items": True, |
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8 "pubsub#deliver_payloads": True} |
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9 |
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10 class Storage: |
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11 |
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12 implements(storage.IStorage) |
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13 |
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14 def __init__(self): |
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15 self._nodes = {} |
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16 |
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17 def get_node(self, node_id): |
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18 try: |
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19 node = self._nodes[node_id] |
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20 except KeyError: |
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21 return defer.fail(storage.NodeNotFound()) |
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22 |
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23 return defer.succeed(node) |
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24 |
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25 def get_node_ids(self): |
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26 return defer.succeed(self._nodes.keys()) |
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27 |
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28 def create_node(self, node_id, owner, config = None, type='leaf'): |
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29 if node_id in self._nodes: |
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30 return defer.fail(storage.NodeExists()) |
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31 |
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32 if not config: |
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33 config = copy.copy(default_config) |
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34 |
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35 if type != 'leaf': |
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36 raise NotImplementedError |
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37 |
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38 node = LeafNode(node_id, owner, config) |
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39 self._nodes[node_id] = node |
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40 |
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41 return defer.succeed(None) |
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42 |
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43 def delete_node(self, node_id): |
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44 try: |
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45 del self._nodes[node_id] |
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46 except KeyError: |
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47 return defer.fail(storage.NodeNotFound()) |
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48 |
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49 return defer.succeed(None) |
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50 |
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51 def get_affiliations(self, entity): |
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52 entity = entity.userhost() |
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53 return defer.succeed([(node.id, node._affiliations[entity]) |
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54 for name, node in self._nodes.iteritems() |
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55 if entity in node._affiliations]) |
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56 |
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57 def get_subscriptions(self, entity): |
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58 subscriptions = [] |
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59 for node in self._nodes.itervalues(): |
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60 for subscriber, subscription in node._subscriptions.iteritems(): |
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61 subscriber = jid.JID(subscriber) |
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62 if subscriber.userhostJID() == entity.userhostJID(): |
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63 subscriptions.append((node.id, subscriber, |
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64 subscription.state)) |
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65 |
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66 return defer.succeed(subscriptions) |
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67 |
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68 class Node: |
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69 |
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70 implements(storage.INode) |
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71 |
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72 def __init__(self, node_id, owner, config): |
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73 self.id = node_id |
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74 self._affiliations = {owner.userhost(): 'owner'} |
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75 self._subscriptions = {} |
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76 self._config = config |
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77 |
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78 def get_type(self): |
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79 return self.type |
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80 |
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81 def get_configuration(self): |
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82 return self._config |
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83 |
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84 def get_meta_data(self): |
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85 config = copy.copy(self._config) |
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86 config["pubsub#node_type"] = self.type |
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87 return config |
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88 |
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89 def set_configuration(self, options): |
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90 for option in options: |
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91 if option in self._config: |
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92 self._config[option] = options[option] |
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93 |
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94 return defer.succeed(None) |
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95 |
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96 def get_affiliation(self, entity): |
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97 return defer.succeed(self._affiliations.get(entity.full())) |
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98 |
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99 def add_subscription(self, subscriber, state): |
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100 try: |
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101 subscription = self._subscriptions[subscriber.full()] |
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102 except: |
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103 subscription = Subscription(state) |
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104 self._subscriptions[subscriber.full()] = subscription |
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105 |
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106 return defer.succeed({'node': self.id, |
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107 'jid': subscriber, |
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108 'subscription': subscription.state}) |
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109 |
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110 def remove_subscription(self, subscriber): |
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111 del self._subscriptions[subscriber.full()] |
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112 |
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113 return defer.succeed(None) |
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114 |
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115 def get_subscribers(self): |
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116 subscribers = [jid.JID(subscriber) for subscriber, subscription |
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117 in self._subscriptions.iteritems() |
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118 if subscription.state == 'subscribed'] |
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119 |
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120 return defer.succeed(subscribers) |
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121 |
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122 def is_subscribed(self, subscriber): |
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123 try: |
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124 subscription = self._subscriptions[subscriber.full()] |
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125 except KeyError: |
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126 return defer.succeed(False) |
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127 |
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128 return defer.succeed(subscription.state == 'subscribed') |
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129 |
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130 class LeafNode(Node): |
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131 |
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132 implements(storage.ILeafNode) |
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133 type = 'leaf' |
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134 |
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135 def __init__(self, node_id, owner, config): |
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136 Node.__init__(self, node_id, owner, config) |
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137 self._items = {} |
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138 self._itemlist = [] |
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139 |
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140 def store_items(self, items, publisher): |
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141 for data in items: |
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142 id = data["id"] |
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143 item = (data.toXml(), publisher) |
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144 if id in self._items: |
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145 self._itemlist.remove(self._items[id]) |
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146 self._items[id] = item |
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147 self._itemlist.append(item) |
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148 |
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149 return defer.succeed(None) |
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150 |
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151 def remove_items(self, item_ids): |
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152 deleted = [] |
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153 |
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154 for item_id in item_ids: |
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155 try: |
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156 item = self._items[item_id] |
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157 self._itemlist.remove(item) |
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158 del self._items[item_id] |
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159 deleted.append(item_id) |
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160 except KeyError: |
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161 pass |
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162 |
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163 return defer.succeed(deleted) |
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164 |
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165 def get_items(self, max_items=None): |
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166 if max_items: |
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167 list = self._itemlist[-max_items:] |
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168 else: |
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169 list = self._itemlist |
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170 return defer.succeed([item[0] for item in list]) |
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171 |
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172 def get_items_by_id(self, item_ids): |
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173 items = [] |
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174 for item_id in item_ids: |
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175 try: |
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176 item = self._items[item_id] |
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177 except KeyError: |
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178 pass |
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179 else: |
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180 items.append(item[0]) |
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181 return defer.succeed(items) |
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182 |
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183 def purge(self): |
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184 self._items = {} |
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185 self._itemlist = [] |
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186 |
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187 return defer.succeed(None) |
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188 |
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189 class Subscription: |
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190 |
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191 implements(storage.ISubscription) |
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192 |
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193 def __init__(self, state): |
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194 self.state = state |
