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      1 /*
      2  * libjingle
      3  * Copyright 2011, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/xmpp/pubsubclient.h"
     29 
     30 #include <string>
     31 #include <vector>
     32 
     33 #include "talk/xmpp/constants.h"
     34 #include "talk/xmpp/jid.h"
     35 #include "talk/xmpp/pubsubtasks.h"
     36 
     37 namespace buzz {
     38 
     39 void PubSubClient::RequestItems() {
     40   PubSubRequestTask* request_task =
     41       new PubSubRequestTask(parent_, pubsubjid_, node_);
     42   request_task->SignalResult.connect(this, &PubSubClient::OnRequestResult);
     43   request_task->SignalError.connect(this, &PubSubClient::OnRequestError);
     44 
     45   PubSubReceiveTask* receive_task =
     46       new PubSubReceiveTask(parent_, pubsubjid_, node_);
     47   receive_task->SignalUpdate.connect(this, &PubSubClient::OnReceiveUpdate);
     48 
     49   receive_task->Start();
     50   request_task->Start();
     51 }
     52 
     53 void PubSubClient::PublishItem(
     54     const std::string& itemid, XmlElement* payload, std::string* task_id_out) {
     55   std::vector<XmlElement*> children;
     56   children.push_back(payload);
     57   PublishItem(itemid, children, task_id_out);
     58 }
     59 
     60 void PubSubClient::PublishItem(
     61     const std::string& itemid, const std::vector<XmlElement*>& children,
     62     std::string* task_id_out) {
     63   PubSubPublishTask* publish_task =
     64       new PubSubPublishTask(parent_, pubsubjid_, node_, itemid, children);
     65   publish_task->SignalError.connect(this, &PubSubClient::OnPublishError);
     66   publish_task->SignalResult.connect(this, &PubSubClient::OnPublishResult);
     67   publish_task->Start();
     68   if (task_id_out) {
     69     *task_id_out = publish_task->task_id();
     70   }
     71 }
     72 
     73 void PubSubClient::RetractItem(
     74     const std::string& itemid, std::string* task_id_out) {
     75   PubSubRetractTask* retract_task =
     76       new PubSubRetractTask(parent_, pubsubjid_, node_, itemid);
     77   retract_task->SignalError.connect(this, &PubSubClient::OnRetractError);
     78   retract_task->SignalResult.connect(this, &PubSubClient::OnRetractResult);
     79   retract_task->Start();
     80   if (task_id_out) {
     81     *task_id_out = retract_task->task_id();
     82   }
     83 }
     84 
     85 void PubSubClient::OnRequestResult(PubSubRequestTask* task,
     86                                    const std::vector<PubSubItem>& items) {
     87   SignalItems(this, items);
     88 }
     89 
     90 void PubSubClient::OnRequestError(IqTask* task,
     91                                   const XmlElement* stanza) {
     92   SignalRequestError(this, stanza);
     93 }
     94 
     95 void PubSubClient::OnReceiveUpdate(PubSubReceiveTask* task,
     96                                    const std::vector<PubSubItem>& items) {
     97   SignalItems(this, items);
     98 }
     99 
    100 const XmlElement* GetItemFromStanza(const XmlElement* stanza) {
    101   if (stanza != NULL) {
    102     const XmlElement* pubsub = stanza->FirstNamed(QN_PUBSUB);
    103     if (pubsub != NULL) {
    104       const XmlElement* publish = pubsub->FirstNamed(QN_PUBSUB_PUBLISH);
    105       if (publish != NULL) {
    106         return publish->FirstNamed(QN_PUBSUB_ITEM);
    107       }
    108     }
    109   }
    110   return NULL;
    111 }
    112 
    113 void PubSubClient::OnPublishResult(PubSubPublishTask* task) {
    114   const XmlElement* item = GetItemFromStanza(task->stanza());
    115   SignalPublishResult(this, task->task_id(), item);
    116 }
    117 
    118 void PubSubClient::OnPublishError(IqTask* task,
    119                                   const XmlElement* error_stanza) {
    120   PubSubPublishTask* publish_task =
    121       static_cast<PubSubPublishTask*>(task);
    122   const XmlElement* item = GetItemFromStanza(publish_task->stanza());
    123   SignalPublishError(this, publish_task->task_id(), item, error_stanza);
    124 }
    125 
    126 void PubSubClient::OnRetractResult(PubSubRetractTask* task) {
    127   SignalRetractResult(this, task->task_id());
    128 }
    129 
    130 void PubSubClient::OnRetractError(IqTask* task,
    131                                   const XmlElement* stanza) {
    132   PubSubRetractTask* retract_task =
    133       static_cast<PubSubRetractTask*>(task);
    134   SignalRetractError(this, retract_task->task_id(), stanza);
    135 }
    136 
    137 
    138 const std::string PubSubClient::GetPublisherNickFromPubSubItem(
    139     const XmlElement* item_elem) {
    140   if (item_elem == NULL) {
    141     return "";
    142   }
    143 
    144   return Jid(item_elem->Attr(QN_ATTR_PUBLISHER)).resource();
    145 }
    146 }  // namespace buzz
    147