Split roster.py into a directory.

1 files changed, 448 insertions, 0 deletions

diff --git a/sleekxmpp/roster/item.py b/sleekxmpp/roster/item.py
new file mode 100644
index 00000000..eb115a4a
--- /dev/null
+++ b/sleekxmpp/roster/item.py
@@ -0,0 +1,448 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2010  Nathanael C. Fritz
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+
+class RosterItem(object):
+
+    """
+    A RosterItem is a single entry in a roster node, and tracks
+    the subscription state and user annotations of a single JID.
+
+    Roster items may use an external datastore to persist roster data
+    across sessions. Client applications will not need to use this
+    functionality, but is intended for components that do not have their
+    roster persisted automatically by the XMPP server.
+
+    Roster items provide many methods for handling incoming presence
+    stanzas that ensure that response stanzas are sent according to
+    RFC 3921.
+
+    The external datastore is accessed through a provided interface
+    object which is stored in self.db. The interface object MUST
+    provide two methods: load and save, both of which are responsible
+    for working with a single roster item. A private dictionary,
+    self._db_state, is used to store any metadata needed by the
+    interface, such as the row ID of a roster item, etc.
+
+    Interface for self.db.load:
+        load(owner_jid, jid, db_state):
+          owner_jid  -- The JID that owns the roster.
+          jid        -- The JID of the roster item.
+          db_state   -- A dictionary containing any data saved
+                        by the interface object after a save()
+                        call. Will typically have the equivalent
+                        of a 'row_id' value.
+
+    Interface for self.db.save:
+        save(owner_jid, jid, item_state, db_state):
+          owner_jid  -- The JID that owns the roster.
+          jid        -- The JID of the roster item.
+          item_state -- A dictionary containing the fields:
+                        'from', 'to', 'pending_in', 'pending_out',
+                        'whitelisted', 'subscription', 'name',
+                        and 'groups'.
+          db_state   -- A dictionary provided for persisting
+                        datastore specific information. Typically,
+                        a value equivalent to 'row_id' will be
+                        stored here.
+
+    State Fields:
+        from         -- Indicates if a subscription of type 'from'
+                        has been authorized.
+        to           -- Indicates if a subscription of type 'to' has
+                        been authorized.
+        pending_in   -- Indicates if a subscription request has been
+                        received from this JID and it has not been
+                        authorized yet.
+        pending_out  -- Indicates if a subscription request has been sent
+                        to this JID and it has not been accepted yet.
+        subscription -- Returns one of: 'to', 'from', 'both', or 'none'
+                        based on the states of from, to, pending_in,
+                        and pending_out. Assignment to this value does
+                        not affect the states of the other values.
+        whitelisted  -- Indicates if a subscription request from this
+                        JID should be automatically accepted.
+        name         -- A user supplied alias for the JID.
+        groups       -- A list of group names for the JID.
+
+    Attributes:
+        xmpp        -- The main SleekXMPP instance.
+        owner       -- The JID that owns the roster.
+        jid         -- The JID for the roster item.
+        db          -- Optional datastore interface object.
+        last_status -- The last presence sent to this JID.
+        resources   -- A dictionary of online resources for this JID.
+                       Will contain the fields 'show', 'status',
+                       and 'priority'.
+
+    Methods:
+        load                -- Retrieve the roster item from an
+                               external datastore, if one was provided.
+        save                -- Save the roster item to an external
+                               datastore, if one was provided.
+        remove              -- Remove a subscription to the JID and revoke
+                               its whitelisted status.
+        subscribe           -- Subscribe to the JID.
+        authorize           -- Accept a subscription from the JID.
+        unauthorize         -- Deny a subscription from the JID.
+        unsubscribe         -- Unsubscribe from the JID.
+        send_presence       -- Send a directed presence to the JID.
+        send_last_presence  -- Resend the last sent presence.
+        handle_available    -- Update the JID's resource information.
+        handle_unavailable  -- Update the JID's resource information.
+        handle_subscribe    -- Handle a subscription request.
+        handle_subscribed   -- Handle a notice that a subscription request
+                               was authorized by the JID.
+        handle_unsubscribe  -- Handle an unsubscribe request.
+        handle_unsubscribed -- Handle a notice that a subscription was
+                               removed by the JID.
+        handle_probe        -- Handle a presence probe query.
+    """
+
+    def __init__(self, xmpp, jid, owner=None,
+                 state=None, db=None):
+        """
+        Create a new roster item.
+
+        Arguments:
+            xmpp  -- The main SleekXMPP instance.
+            jid   -- The item's JID.
+            owner -- The roster owner's JID. Defaults
+                     so self.xmpp.boundjid.bare.
+            state -- A dictionary of initial state values.
+            db    -- An optional interface to an external datastore.
+        """
+        self.xmpp = xmpp
+        self.jid = jid
+        self.owner = owner or self.xmpp.boundjid.bare
+        self.last_status = None
+        self.resources = {}
+        self.db = db
+        self._state = state or {
+                'from': False,
+                'to': False,
+                'pending_in': False,
+                'pending_out': False,
+                'whitelisted': False,
+                'subscription': 'none',
+                'name': '',
+                'groups': []}
+        self._db_state = {}
+        self.load()
+
+    def set_backend(self, db=None):
+        """
+        Set the datastore interface object for the roster item.
+
+        Arguments:
+            db -- The new datastore interface.
+        """
+        self.db = db
+        self.load()
+
+    def load(self):
+        """
+        Load the item's state information from an external datastore,
+        if one has been provided.
+        """
+        if self.db:
+            item = self.db.load(self.owner, self.jid,
+                                       self._db_state)
+            if item:
+                self['name'] = item['name']
+                self['groups'] = item['groups']
+                self['from'] = item['from']
+                self['to'] = item['to']
+                self['whitelisted'] = item['whitelisted']
+                self['pending_out'] = item['pending_out']
+                self['pending_in'] = item['pending_in']
+                self['subscription'] = self._subscription()
+            return self._state
+        return None
+
+    def save(self):
+        """
+        Save the item's state information to an external datastore,
+        if one has been provided.
+        """
+        if self.db:
+            self.db.save(self.owner, self.jid,
+                         self._state, self._db_state)
+
+    def __getitem__(self, key):
+        """Return a state field's value."""
+        if key in self._state:
+            if key == 'subscription':
+                return self._subscription()
+            return self._state[key]
+        else:
+            raise KeyError
+
+    def __setitem__(self, key, value):
+        """
+        Set the value of a state field.
+
+        For boolean states, the values True, 'true', '1', 'on',
+        and 'yes' are accepted as True; all others are False.
+
+        Arguments:
+            key   -- The state field to modify.
+            value -- The new value of the state field.
+        """
+        if key in self._state:
+            if key in ['name', 'subscription', 'groups']:
+                self._state[key] = value
+            else:
+                value = str(value).lower()
+                self._state[key] = value in ('true', '1', 'on', 'yes')
+        else:
+            raise KeyError
+
+    def _subscription(self):
+        """Return the proper subscription type based on current state."""
+        if self['to'] and self['from']:
+            return 'both'
+        elif self['from']:
+            return 'from'
+        elif self['to']:
+            return 'to'
+        else:
+            return 'none'
+
+    def remove(self):
+        """
+        Remove a JID's whitelisted status and unsubscribe if a
+        subscription exists.
+        """
+        if self['to']:
+            p = self.xmpp.Presence()
+            p['to'] = self.jid
+            p['type'] = ['unsubscribe']
+            if self.xmpp.is_component:
+                p['from'] = self.owner
+            p.send()
+            self['to'] = False
+        self['whitelisted'] = False
+        self.save()
+
+    def subscribe(self):
+        """Send a subscription request to the JID."""
+        p = self.xmpp.Presence()
+        p['to'] = self.jid
+        p['type'] = 'subscribe'
+        if self.xmpp.is_component:
+            p['from'] = self.owner
+        self['pending_out'] = True
+        self.save()
+        p.send()
+
+    def authorize(self):
+        """Authorize a received subscription request from the JID."""
+        self['from'] = True
+        self['pending_in'] = False
+        self.save()
+        self._subscribed()
+        self.send_last_presence()
+
+    def unauthorize(self):
+        """Deny a received subscription request from the JID."""
+        self['from'] = False
+        self['pending_in'] = False
+        self.save()
+        self._unsubscribed()
+        p = self.xmpp.Presence()
+        p['to'] = self.jid
+        p['type'] = 'unavailable'
+        if self.xmpp.is_component:
+            p['from'] = self.owner
+        p.send()
+
+    def _subscribed(self):
+        """Handle acknowledging a subscription."""
+        p = self.xmpp.Presence()
+        p['to'] = self.jid
+        p['type'] = 'subscribed'
+        if self.xmpp.is_component:
+            p['from'] = self.owner
+        p.send()
+
+    def unsubscribe(self):
+        """Unsubscribe from the JID."""
+        p = self.xmpp.Presence()
+        p['to'] = self.jid
+        p['type'] = 'unsubscribe'
+        if self.xmpp.is_component:
+            p['from'] = self.owner
+        self.save()
+        p.send()
+
+    def _unsubscribed(self):
+        """Handle acknowledging an unsubscribe request."""
+        p = self.xmpp.Presence()
+        p['to'] = self.jid
+        p['type'] = 'unsubscribed'
+        if self.xmpp.is_component:
+            p['from'] = self.owner
+        p.send()
+
+    def send_presence(self, ptype='available', status=None):
+        p = self.xmpp.Presence()
+        p['to'] = self.jid
+        p['type'] = ptype
+        p['status'] = status
+        if self.xmpp.is_component:
+            p['from'] = self.owner
+        self.last_status = p
+        p.send()
+
+    def send_last_presence(self):
+        if self.last_status is None:
+            self.send_presence()
+        else:
+            self.last_status.send()
+
+    def handle_available(self, presence):
+        resource = presence['from'].resource
+        data = {'status': presence['status'],
+                'show': presence['show'],
+                'priority': presence['priority']}
+        if not self.resources:
+            self.xmpp.event('got_online', presence)
+        if resource not in self.resources:
+            self.resources[resource] = {}
+        self.resources[resource].update(data)
+
+    def handle_unavailable(self, presence):
+        resource = presence['from'].resource
+        if not self.resources:
+            return
+        if resource in self.resources:
+            del self.resources[resource]
+        if not self.resources:
+            self.xmpp.event('got_offline', presence)
+
+    def handle_subscribe(self, presence):
+        """
+        +------------------------------------------------------------------+
+        |  EXISTING STATE          |  DELIVER?  |  NEW STATE               |
+        +------------------------------------------------------------------+
+        |  "None"                  |  yes       |  "None + Pending In"     |
+        |  "None + Pending Out"    |  yes       |  "None + Pending Out/In" |
+        |  "None + Pending In"     |  no        |  no state change         |
+        |  "None + Pending Out/In" |  no        |  no state change         |
+        |  "To"                    |  yes       |  "To + Pending In"       |
+        |  "To + Pending In"       |  no        |  no state change         |
+        |  "From"                  |  no *      |  no state change         |
+        |  "From + Pending Out"    |  no *      |  no state change         |
+        |  "Both"                  |  no *      |  no state change         |
+        +------------------------------------------------------------------+
+        """
+        if self.xmpp.is_component:
+            if not self['from'] and not self['pending_in']:
+                self['pending_in'] = True
+                self.xmpp.event('roster_subscription_request', presence)
+            elif self['from']:
+                self._subscribed()
+            self.save()
+        else:
+            #server shouldn't send an invalid subscription request
+            self.xmpp.event('roster_subscription_request', presence)
+
+    def handle_subscribed(self, presence):
+        """
+        +------------------------------------------------------------------+
+        |  EXISTING STATE          |  DELIVER?  |  NEW STATE               |
+        +------------------------------------------------------------------+
+        |  "None"                  |  no        |  no state change         |
+        |  "None + Pending Out"    |  yes       |  "To"                    |
+        |  "None + Pending In"     |  no        |  no state change         |
+        |  "None + Pending Out/In" |  yes       |  "To + Pending In"       |
+        |  "To"                    |  no        |  no state change         |
+        |  "To + Pending In"       |  no        |  no state change         |
+        |  "From"                  |  no        |  no state change         |
+        |  "From + Pending Out"    |  yes       |  "Both"                  |
+        |  "Both"                  |  no        |  no state change         |
+        +------------------------------------------------------------------+
+        """
+        if self.xmpp.is_component:
+            if not self['to'] and self['pending_out']:
+                self['pending_out'] = False
+                self['to'] = True
+                self.xmpp.event('roster_subscription_authorized', presence)
+            self.save()
+        else:
+            self.xmpp.event('roster_subscription_authorized', presence)
+
+    def handle_unsubscribe(self, presence):
+        """
+        +------------------------------------------------------------------+
+        |  EXISTING STATE          |  DELIVER?  |  NEW STATE               |
+        +------------------------------------------------------------------+
+        |  "None"                  |  no        |  no state change         |
+        |  "None + Pending Out"    |  no        |  no state change         |
+        |  "None + Pending In"     |  yes *     |  "None"                  |
+        |  "None + Pending Out/In" |  yes *     |  "None + Pending Out"    |
+        |  "To"                    |  no        |  no state change         |
+        |  "To + Pending In"       |  yes *     |  "To"                    |
+        |  "From"                  |  yes *     |  "None"                  |
+        |  "From + Pending Out"    |  yes *     |  "None + Pending Out     |
+        |  "Both"                  |  yes *     |  "To"                    |
+        +------------------------------------------------------------------+
+        """
+        if self.xmpp.is_component:
+            if not self['from']  and self['pending_in']:
+                self['pending_in'] = False
+                self._unsubscribed()
+            elif self['from']:
+                self['from'] = False
+                self._unsubscribed()
+                self.xmpp.event('roster_subscription_remove', presence)
+            self.save()
+        else:
+            self.xmpp.event('roster_subscription_remove', presence)
+
+    def handle_unsubscribed(self, presence):
+        """
+        +------------------------------------------------------------------+
+        |  EXISTING STATE          |  DELIVER?  |  NEW STATE               |
+        +------------------------------------------------------------------+
+        |  "None"                  |  no        |  no state change         |
+        |  "None + Pending Out"    |  yes       |  "None"                  |
+        |  "None + Pending In"     |  no        |  no state change         |
+        |  "None + Pending Out/In" |  yes       |  "None + Pending In"     |
+        |  "To"                    |  yes       |  "None"                  |
+        |  "To + Pending In"       |  yes       |  "None + Pending In"     |
+        |  "From"                  |  no        |  no state change         |
+        |  "From + Pending Out"    |  yes       |  "From"                  |
+        |  "Both"                  |  yes       |  "From"                  |
+        +------------------------------------------------------------------
+        """
+        if self.xmpp.is_component:
+            if not self['to'] and self['pending_out']:
+                self['pending_out'] = False
+            elif self['to'] and not self['pending_out']:
+                self['to'] = False
+                self.xmpp.event('roster_subscription_removed', presence)
+            self.save()
+        else:
+            self.xmpp.event('roster_subscription_removed', presence)
+
+    def handle_probe(self, presence):
+        if self['to']:
+            self.send_last_presence()
+        if self['pending_out']:
+            self.subscribe()
+        if not self['to']:
+            self._unsubscribed()
+
+    def reset(self):
+        """
+        Forgot current resource presence information as part of
+        a roster reset request.
+        """
+        self.resources = {}