text: /**
   *    Copyright (C) 2008-2014 MongoDB Inc.
   *
   *    This program is free software: you can redistribute it and/or  modify
   *    it under the terms of the GNU Affero General Public License, version 3,
   *    as published by the Free Software Foundation.
   *
   *    This program is distributed in the hope that it will be useful,
   *    but WITHOUT ANY WARRANTY; without even the implied warranty of
   *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *    GNU Affero General Public License for more details.
   *
   *    You should have received a copy of the GNU Affero General Public License
   *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
   *
   *    As a special exception, the copyright holders give permission to link the
   *    code of portions of this program with the OpenSSL library under certain
   *    conditions as described in each individual source file and distribute
   *    linked combinations including the program with the OpenSSL library. You
   *    must comply with the GNU Affero General Public License in all respects for
   *    all of the code used other than as permitted herein. If you modify file(s)
   *    with this exception, you may extend this exception to your version of the
   *    file(s), but you are not obligated to do so. If you do not wish to do so,
   *    delete this exception statement from your version. If you delete this
   *    exception statement from all source files in the program, then also delete
   *    it in the license file.
   */
  
  #include "mongo/platform/basic.h"
  
  #include <vector>
  
  #include "mongo/db/auth/action_set.h"
  #include "mongo/db/auth/action_type.h"
  #include "mongo/db/auth/privilege.h"
  #include "mongo/db/catalog/collection.h"
  #include "mongo/db/catalog/database.h"
  #include "mongo/db/commands.h"
  #include "mongo/db/curop.h"
  #include "mongo/db/db_raii.h"
  #include "mongo/db/index/haystack_access_method.h"
  #include "mongo/db/index/index_access_method.h"
  #include "mongo/db/index/index_descriptor.h"
  #include "mongo/db/index_names.h"
  #include "mongo/db/jsobj.h"
  #include "mongo/db/namespace_string.h"
  #include "mongo/db/query/find_common.h"
  
  /**
   * Examines all documents in a given radius of a given point.
   * Returns all documents that match a given search restriction.
   * See http://dochub.mongodb.org/core/haystackindexes
   *
   * Use when you want to look for restaurants within 25 miles with a certain name.
   * Don't use when you want to find the closest open restaurants.
   */
  namespace mongo {
  
  using std::string;
  using std::vector;
  
  class GeoHaystackSearchCommand : public ErrmsgCommandDeprecated {
  public:
      GeoHaystackSearchCommand() : ErrmsgCommandDeprecated("geoSearch") {}
  
      virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
          return false;
      }
  
      bool slaveOk() const {
          return true;
      }
  
      bool slaveOverrideOk() const {
          return true;
      }
  
      bool supportsReadConcern(const std::string& dbName, const BSONObj& cmdObj) const final {
          return true;
      }
  
      ReadWriteType getReadWriteType() const {
          return ReadWriteType::kRead;
      }
  
      std::size_t reserveBytesForReply() const override {
          return FindCommon::kInitReplyBufferSize;
      }
  
      virtual void addRequiredPrivileges(const std::string& dbname,
                                         const BSONObj& cmdObj,
                                         std::vector<Privilege>* out) {
          ActionSet actions;
          actions.addAction(ActionType::find);
          out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
      }
  
      bool errmsgRun(OperationContext* opCtx,
                     const string& dbname,
                     const BSONObj& cmdObj,
                     string& errmsg,
                     BSONObjBuilder& result) {
          const NamespaceString nss = parseNsCollectionRequired(dbname, cmdObj);
  
          AutoGetCollectionForReadCommand ctx(opCtx, nss);
  
          Collection* collection = ctx.getCollection();
          if (!collection) {
              errmsg = "can't find ns";
              return false;
          }
  
          vector<IndexDescriptor*> idxs;
          collection->getIndexCatalog()->findIndexByType(opCtx, IndexNames::GEO_HAYSTACK, idxs);
          if (idxs.size() == 0) {
              errmsg = "no geoSearch index";
              return false;
          }
          if (idxs.size() > 1) {
              errmsg = "more than 1 geosearch index";
              return false;
          }
  
          BSONElement nearElt = cmdObj["near"];
          BSONElement maxDistance = cmdObj["maxDistance"];
          BSONElement search = cmdObj["search"];
  
          uassert(13318, "near needs to be an array", nearElt.isABSONObj());
          uassert(13319, "maxDistance needs a number", maxDistance.isNumber());
          uassert(13320, "search needs to be an object", search.type() == Object);
  
          unsigned limit = 50;
          if (cmdObj["limit"].isNumber())
              limit = static_cast<unsigned>(cmdObj["limit"].numberInt());
  
          IndexDescriptor* desc = idxs[0];
          HaystackAccessMethod* ham =
              static_cast<HaystackAccessMethod*>(collection->getIndexCatalog()->getIndex(desc));
          ham->searchCommand(opCtx,
                             collection,
                             nearElt.Obj(),
                             maxDistance.numberDouble(),
                             search.Obj(),
                             &result,
                             limit);
          return 1;
      }
  } nameSearchCommand;
  
  }  // namespace mongo
  