139 lines
4.9 KiB
C++
139 lines
4.9 KiB
C++
/*
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Copyright (c) 2013, Project OSRM, Dennis Luxen, others
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef NEAREST_PLUGIN_H
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#define NEAREST_PLUGIN_H
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#include "BasePlugin.h"
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#include "../DataStructures/PhantomNodes.h"
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#include "../Util/StringUtil.h"
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#include <unordered_map>
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/*
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* This Plugin locates the nearest point on a street in the road network for a given coordinate.
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*/
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template <class DataFacadeT> class NearestPlugin : public BasePlugin
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{
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public:
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explicit NearestPlugin(DataFacadeT *facade) : facade(facade), descriptor_string("nearest")
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{
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descriptor_table.emplace("", 0); // default descriptor
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descriptor_table.emplace("json", 1);
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}
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const std::string GetDescriptor() const { return descriptor_string; }
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void HandleRequest(const RouteParameters &routeParameters, http::Reply &reply)
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{
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// check number of parameters
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if (routeParameters.coordinates.empty())
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{
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reply = http::Reply::StockReply(http::Reply::badRequest);
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return;
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}
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if (!routeParameters.coordinates.front().isValid())
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{
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reply = http::Reply::StockReply(http::Reply::badRequest);
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return;
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}
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PhantomNode result;
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facade->FindPhantomNodeForCoordinate(
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routeParameters.coordinates.front(), result, routeParameters.zoomLevel);
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// json
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if (!routeParameters.jsonpParameter.empty())
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{
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reply.content.push_back(routeParameters.jsonpParameter);
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reply.content.push_back("(");
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}
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reply.status = http::Reply::ok;
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reply.content.push_back("{\"status\":");
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if (SPECIAL_NODEID != result.forward_node_id)
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{
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reply.content.push_back("0,");
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}
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else
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{
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reply.content.push_back("207,");
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}
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reply.content.push_back("\"mapped_coordinate\":[");
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std::string temp_string;
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if (SPECIAL_NODEID != result.forward_node_id)
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{
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FixedPointCoordinate::convertInternalLatLonToString(result.location.lat, temp_string);
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reply.content.push_back(temp_string);
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FixedPointCoordinate::convertInternalLatLonToString(result.location.lon, temp_string);
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reply.content.push_back(",");
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reply.content.push_back(temp_string);
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}
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reply.content.push_back("],\"name\":\"");
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if (SPECIAL_NODEID != result.forward_node_id)
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{
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facade->GetName(result.name_id, temp_string);
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reply.content.push_back(temp_string);
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}
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reply.content.push_back("\"}");
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reply.headers.resize(3);
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if (!routeParameters.jsonpParameter.empty())
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{
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reply.content.push_back(")");
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reply.headers[1].name = "Content-Type";
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reply.headers[1].value = "text/javascript";
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reply.headers[2].name = "Content-Disposition";
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reply.headers[2].value = "attachment; filename=\"location.js\"";
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}
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else
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{
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reply.headers[1].name = "Content-Type";
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reply.headers[1].value = "application/x-javascript";
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reply.headers[2].name = "Content-Disposition";
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reply.headers[2].value = "attachment; filename=\"location.json\"";
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}
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reply.headers[0].name = "Content-Length";
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unsigned content_length = 0;
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for (const std::string &snippet : reply.content)
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{
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content_length += snippet.length();
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}
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intToString(content_length, temp_string);
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reply.headers[0].value = temp_string;
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}
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private:
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DataFacadeT *facade;
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std::unordered_map<std::string, unsigned> descriptor_table;
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std::string descriptor_string;
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};
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#endif /* NEAREST_PLUGIN_H */
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