1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 | <?php function getTrip($tripID) { global $conn; $query = "Select * from trips join routes on trips.route_id = routes.route_id where trip_id = :tripID LIMIT 1"; debug($query, "database"); $query = $conn->prepare($query); $query->bindParam(":tripID", $tripID); $query->execute(); if (!$query) { databaseError($conn->errorInfo()); return Array(); } return $query->fetch(PDO::FETCH_ASSOC); } function getTripShape($tripID) { global $conn; $query = "SELECT ST_AsKML(ST_MakeLine(geometry(a.position))) as the_route FROM (SELECT position, stop_sequence, trips.trip_id FROM stop_times join trips on trips.trip_id = stop_times.trip_id join stops on stops.stop_id = stop_times.stop_id WHERE trips.trip_id = :tripID ORDER BY stop_sequence) as a group by a.trip_id"; debug($query, "database"); $query = $conn->prepare($query); $query->bindParam(":tripID", $tripID); $query->execute(); if (!$query) { databaseError($conn->errorInfo()); return Array(); } return $query->fetchColumn(0); } function getTimeInterpolatedTrip($tripID, $range = "") { global $conn; $query = "SELECT stop_times.trip_id,arrival_time,stop_times.stop_id,stop_lat,stop_lon,stop_name,stop_code, stop_sequence,service_id,trips.route_id,route_short_name,route_long_name FROM stop_times join trips on trips.trip_id = stop_times.trip_id join routes on trips.route_id = routes.route_id join stops on stops.stop_id = stop_times.stop_id WHERE trips.trip_id = :tripID $range ORDER BY stop_sequence"; debug($query, "database"); $query = $conn->prepare($query); $query->bindParam(":tripID", $tripID); $query->execute(); if (!$query) { databaseError($conn->errorInfo()); return Array(); } $stopTimes = $query->fetchAll(); $cur_timepoint = Array(); $next_timepoint = Array(); $distance_between_timepoints = 0.0; $distance_traveled_between_timepoints = 0.0; $rv = Array(); foreach ($stopTimes as $i => $stopTime) { if ($stopTime['arrival_time'] != "") { // is timepoint $cur_timepoint = $stopTime; $distance_between_timepoints = 0.0; $distance_traveled_between_timepoints = 0.0; if ($i + 1 < sizeof($stopTimes)) { $k = $i + 1; $distance_between_timepoints+= distance($stopTimes[$k - 1]["stop_lat"], $stopTimes[$k - 1]["stop_lon"], $stopTimes[$k]["stop_lat"], $stopTimes[$k]["stop_lon"]); while ($stopTimes[$k]["arrival_time"] == "" && $k + 1 < sizeof($stopTimes)) { $k+= 1; //echo "k".$k; $distance_between_timepoints+= distance($stopTimes[$k - 1]["stop_lat"], $stopTimes[$k - 1]["stop_lon"], $stopTimes[$k]["stop_lat"], $stopTimes[$k]["stop_lon"]); } $next_timepoint = $stopTimes[$k]; $rv[] = $stopTime; } } else { // is untimed point //echo "i".$i; $distance_traveled_between_timepoints+= distance($stopTimes[$i - 1]["stop_lat"], $stopTimes[$i - 1]["stop_lon"], $stopTimes[$i]["stop_lat"], $stopTimes[$i]["stop_lon"]); //echo "$distance_traveled_between_timepoints / $distance_between_timepoints<br>"; $distance_percent = $distance_traveled_between_timepoints / $distance_between_timepoints; if ($next_timepoint["arrival_time"] != "") { $total_time = strtotime($next_timepoint["arrival_time"]) - strtotime($cur_timepoint["arrival_time"]); //echo strtotime($next_timepoint["arrival_time"])." - ".strtotime($cur_timepoint["arrival_time"])."<br>"; $time_estimate = ($distance_percent * $total_time) + strtotime($cur_timepoint["arrival_time"]); $stopTime["arrival_time"] = date("H:i:s", $time_estimate); } else { $stopTime["arrival_time"] = $cur_timepoint["arrival_time"]; } $rv[] = $stopTime; //var_dump($rv); } } return $rv; } function getTripPreviousTimePoint($tripID, $stop_sequence) { global $conn; $query = " SELECT trip_id,stop_id, stop_sequence FROM stop_times WHERE trip_id = :tripID and stop_sequence < :stop_sequence and stop_times.arrival_time IS NOT NULL ORDER BY stop_sequence DESC LIMIT 1"; debug($query, "database"); $query = $conn->prepare($query); $query->bindParam(":tripID", $tripID); $query->bindParam(":stop_sequence", $stop_sequence); $query->execute(); if (!$query) { databaseError($conn->errorInfo()); return Array(); } return $query->fetch(PDO::FETCH_ASSOC); } function getTripNextTimePoint($tripID, $stop_sequence) { global $conn; $query = " SELECT trip_id,stop_id, stop_sequence FROM stop_times WHERE trip_id = :tripID and stop_sequence > :stop_sequence and stop_times.arrival_time IS NOT NULL ORDER BY stop_sequence LIMIT 1"; debug($query, "database"); $query = $conn->prepare($query); $query->bindParam(":tripID", $tripID); $query->bindParam(":stop_sequence", $stop_sequence); $query->execute(); if (!$query) { databaseError($conn->errorInfo()); return Array(); } return $query->fetch(PDO::FETCH_ASSOC); } function getTimeInterpolatedTripAtStop($tripID, $stop_sequence) { global $conn; // limit interpolation to between nearest actual points. $prevTimePoint = getTripPreviousTimePoint($tripID, $stop_sequence); $nextTimePoint = getTripNextTimePoint($tripID, $stop_sequence); $range = "AND stop_sequence >= '{$prevTimePoint['stop_sequence']}' AND stop_sequence <= '{$nextTimePoint['stop_sequence']}'"; foreach (getTimeInterpolatedTrip($tripID, $range) as $tripStop) { if ($tripStop['stop_sequence'] == $stop_sequence) return $tripStop; } return Array(); } function getTripStartTime($tripID) { global $conn; $query = "Select * from stop_times where trip_id = :tripID AND arrival_time IS NOT NULL AND stop_sequence = '1'"; debug($query, "database"); $query = $conn->prepare($query); $query->bindParam(":tripID", $tripID); $query->execute(); if (!$query) { databaseError($conn->errorInfo()); return Array(); } $r = $query->fetch(PDO::FETCH_ASSOC); return $r['arrival_time']; } function getActiveTrips($time) { global $conn; if ($time == "") $time = current_time(); $query = "Select distinct stop_times.trip_id, start_times.arrival_time as start_time, end_times.arrival_time as end_time from stop_times, (SELECT trip_id,arrival_time from stop_times WHERE stop_times.arrival_time IS NOT NULL AND stop_sequence = '1') as start_times, (SELECT trip_id,max(arrival_time) as arrival_time from stop_times WHERE stop_times.arrival_time IS NOT NULL group by trip_id) as end_times WHERE start_times.trip_id = end_times.trip_id AND stop_times.trip_id = end_times.trip_id AND :time > start_times.arrival_time AND :time < end_times.arrival_time"; debug($query, "database"); $query = $conn->prepare($query); $query->bindParam(":time", $time); $query->execute(); if (!$query) { databaseError($conn->errorInfo()); return Array(); } return $query->fetchAll(); } function viaPoints($tripID, $stop_sequence = "") { global $conn; $query = "SELECT stops.stop_id, stop_name, arrival_time FROM stop_times join stops on stops.stop_id = stop_times.stop_id WHERE stop_times.trip_id = :tripID " . ($stop_sequence != "" ? " AND stop_sequence > :stop_sequence " : "") . "AND substr(stop_code,1,2) != 'Wj' ORDER BY stop_sequence"; debug($query, "database"); $query = $conn->prepare($query); if ($stop_sequence != "") $query->bindParam(":stop_sequence", $stop_sequence); $query->bindParam(":tripID", $tripID); $query->execute(); if (!$query) { databaseError($conn->errorInfo()); return Array(); } return $query->fetchAll(); } function viaPointNames($tripid, $stop_sequence = "") { $viaPointNames = Array(); foreach (viaPoints($tripid, $stop_sequence) as $point) { $viaPointNames[] = $point['stop_name']; } if (sizeof($viaPointNames) > 0) { return r_implode(", ", $viaPointNames); } else { return ""; } } ?> |