236 lines
11 KiB
C++
236 lines
11 KiB
C++
/*
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open source routing machine
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Copyright (C) Dennis Luxen, others 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU AFFERO General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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or see http://www.gnu.org/licenses/agpl.txt.
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*/
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#ifndef JSON_DESCRIPTOR_H_
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#define JSON_DESCRIPTOR_H_
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#include <algorithm>
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#include "BaseDescriptor.h"
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#include "DescriptionFactory.h"
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#include "../Algorithms/ObjectToBase64.h"
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#include "../DataStructures/SegmentInformation.h"
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#include "../DataStructures/TurnInstructions.h"
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#include "../Util/Azimuth.h"
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#include "../Util/StringUtil.h"
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template<class SearchEngineT>
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class JSONDescriptor : public BaseDescriptor<SearchEngineT>{
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private:
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_DescriptorConfig config;
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DescriptionFactory descriptionFactory;
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_Coordinate current;
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unsigned numberOfEnteredRestrictedAreas;
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struct {
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int startIndex;
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int nameID;
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int leaveAtExit;
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} roundAbout;
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public:
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JSONDescriptor() : numberOfEnteredRestrictedAreas(0) {}
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void SetConfig(const _DescriptorConfig & c) { config = c; }
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void Run(http::Reply & reply, RawRouteData &rawRoute, PhantomNodes &phantomNodes, SearchEngineT &sEngine, const unsigned durationOfTrip) {
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WriteHeaderToOutput(reply.content);
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if(durationOfTrip != INT_MAX) {
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descriptionFactory.SetStartSegment(phantomNodes.startPhantom);
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reply.content += "0,"
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"\"status_message\": \"Found route between points\",";
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//Get all the coordinates for the computed route
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BOOST_FOREACH(_PathData & pathData, rawRoute.computedRouted) {
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sEngine.GetCoordinatesForNodeID(pathData.node, current);
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descriptionFactory.AppendSegment(current, pathData );
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}
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descriptionFactory.SetEndSegment(phantomNodes.targetPhantom);
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} else {
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//We do not need to do much, if there is no route ;-)
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reply.content += "207,"
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"\"status_message\": \"Cannot find route between points\",";
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}
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descriptionFactory.Run(sEngine, config.z, durationOfTrip);
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reply.content += "\"route_geometry\": ";
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if(config.geometry) {
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descriptionFactory.AppendEncodedPolylineString(reply.content, config.encodeGeometry);
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} else {
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reply.content += "[]";
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}
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reply.content += ","
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"\"route_instructions\": [";
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if(config.instructions) {
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//Segment information has following format:
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//["instruction","streetname",length,position,time,"length","earth_direction",azimuth]
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//Example: ["Turn left","High Street",200,4,10,"200m","NE",22.5]
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//See also: http://developers.cloudmade.com/wiki/navengine/JSON_format
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unsigned prefixSumOfNecessarySegments = 0;
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roundAbout.leaveAtExit = 0;
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roundAbout.nameID = 0;
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std::string tmpDist, tmpLength, tmpDuration, tmpBearing, tmpInstruction;
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//Fetch data from Factory and generate a string from it.
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BOOST_FOREACH(const SegmentInformation & segment, descriptionFactory.pathDescription) {
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short currentInstruction = segment.turnInstruction & TurnInstructions.InverseAccessRestrictionFlag;
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numberOfEnteredRestrictedAreas += (currentInstruction != segment.turnInstruction);
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if(TurnInstructions.TurnIsNecessary( currentInstruction) ) {
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if(TurnInstructions.EnterRoundAbout == currentInstruction) {
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roundAbout.nameID = segment.nameID;
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roundAbout.startIndex = prefixSumOfNecessarySegments;
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} else {
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if(0 != prefixSumOfNecessarySegments){
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reply.content += ",";
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}
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reply.content += "[\"";
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if(TurnInstructions.LeaveRoundAbout == currentInstruction) {
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intToString(TurnInstructions.EnterRoundAbout, tmpInstruction);
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reply.content += tmpInstruction;
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reply.content += "-";
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intToString(roundAbout.leaveAtExit+1, tmpInstruction);
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reply.content += tmpInstruction;
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roundAbout.leaveAtExit = 0;
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} else {
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intToString(currentInstruction, tmpInstruction);
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reply.content += tmpInstruction;
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}
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reply.content += "\",\"";
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reply.content += sEngine.GetEscapedNameForNameID(segment.nameID);
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reply.content += "\",";
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intToString(segment.length, tmpDist);
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reply.content += tmpDist;
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reply.content += ",";
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intToString(prefixSumOfNecessarySegments, tmpLength);
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reply.content += tmpLength;
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reply.content += ",";
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intToString(segment.duration, tmpDuration);
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reply.content += tmpDuration;
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reply.content += ",\"";
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intToString(segment.length, tmpLength);
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reply.content += tmpLength;
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reply.content += "m\",\"";
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reply.content += Azimuth::Get(segment.bearing);
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reply.content += "\",";
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doubleToStringWithTwoDigitsBehindComma(segment.bearing, tmpBearing);
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reply.content += tmpBearing;
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reply.content += "]";
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}
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} else if(TurnInstructions.StayOnRoundAbout == currentInstruction) {
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++roundAbout.leaveAtExit;
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}
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if(segment.necessary)
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++prefixSumOfNecessarySegments;
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}
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if(durationOfTrip != INT_MAX) {
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reply.content += ",[\"";
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intToString(TurnInstructions.ReachedYourDestination, tmpInstruction);
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reply.content += tmpInstruction;
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reply.content += "\",\"";
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reply.content += "\",";
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reply.content += "0";
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reply.content += ",";
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intToString(prefixSumOfNecessarySegments-1, tmpLength);
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reply.content += tmpLength;
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reply.content += ",";
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reply.content += "0";
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reply.content += ",\"";
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reply.content += "\",\"";
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reply.content += Azimuth::Get(0.0);
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reply.content += "\",";
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reply.content += "0.0";
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reply.content += "]";
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}
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} else {
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BOOST_FOREACH(const SegmentInformation & segment, descriptionFactory.pathDescription) {
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short currentInstruction = segment.turnInstruction & TurnInstructions.InverseAccessRestrictionFlag;
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numberOfEnteredRestrictedAreas += (currentInstruction != segment.turnInstruction);
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}
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}
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reply.content += "],";
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// INFO("Entered " << numberOfEnteredRestrictedAreas << " restricted areas");
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descriptionFactory.BuildRouteSummary(descriptionFactory.entireLength, durationOfTrip - ( numberOfEnteredRestrictedAreas*TurnInstructions.AccessRestrictionPenaly));
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reply.content += "\"route_summary\": {"
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"\"total_distance\":";
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reply.content += descriptionFactory.summary.lengthString;
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reply.content += ","
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"\"total_time\":";
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reply.content += descriptionFactory.summary.durationString;
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reply.content += ","
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"\"start_point\":\"";
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reply.content += sEngine.GetEscapedNameForNameID(descriptionFactory.summary.startName);
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reply.content += "\","
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"\"end_point\":\"";
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reply.content += sEngine.GetEscapedNameForNameID(descriptionFactory.summary.destName);
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reply.content += "\"";
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reply.content += "},";
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//list all viapoints so that the client may display it
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reply.content += "\"via_points\":[";
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std::string tmp;
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if(true == config.geometry) {
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for(unsigned i = 0; i < rawRoute.segmentEndCoordinates.size(); ++i) {
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reply.content += "[";
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if(rawRoute.segmentEndCoordinates[i].startPhantom.location.isSet())
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convertInternalReversedCoordinateToString(rawRoute.segmentEndCoordinates[i].startPhantom.location, tmp);
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else
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convertInternalReversedCoordinateToString(rawRoute.rawViaNodeCoordinates[i], tmp);
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reply.content += tmp;
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reply.content += "],";
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}
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reply.content += "[";
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if(rawRoute.segmentEndCoordinates.back().startPhantom.location.isSet())
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convertInternalReversedCoordinateToString(rawRoute.segmentEndCoordinates.back().targetPhantom.location, tmp);
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else
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convertInternalReversedCoordinateToString(rawRoute.rawViaNodeCoordinates.back(), tmp);
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reply.content += tmp;
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reply.content += "]";
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}
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reply.content += "],";
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reply.content += "\"hint_data\": {";
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reply.content += "\"checksum\":";
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intToString(rawRoute.checkSum, tmp);
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reply.content += tmp;
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reply.content += ", \"locations\": [";
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std::string hint;
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for(unsigned i = 0; i < rawRoute.segmentEndCoordinates.size(); ++i) {
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reply.content += "\"";
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EncodeObjectToBase64(rawRoute.segmentEndCoordinates[i].startPhantom, hint);
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reply.content += hint;
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reply.content += "\", ";
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}
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EncodeObjectToBase64(rawRoute.segmentEndCoordinates.back().targetPhantom, hint);
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reply.content += "\"";
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reply.content += hint;
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reply.content += "\"]";
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reply.content += "},";
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reply.content += "\"transactionId\": \"OSRM Routing Engine JSON Descriptor (v0.3)\"";
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reply.content += "}";
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}
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inline void WriteHeaderToOutput(std::string & output) {
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output += "{"
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"\"version\": 0.3,"
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"\"status\":";
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}
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};
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#endif /* JSON_DESCRIPTOR_H_ */
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