lib/lib.php

   1 <?php
   2
   3 function fail($sError, $sUserError = false)
   4 {
   5     if (!$sUserError) $sUserError = $sError;
   6     error_log('ERROR: '.$sError);
   7     echo $sUserError."\n";
   8     exit(-1);
   9 }
  10
  11
  12 function getProcessorCount()
  13 {
  14     $sCPU = file_get_contents('/proc/cpuinfo');
  15     preg_match_all('#processor\s+: [0-9]+#', $sCPU, $aMatches);
  16     return count($aMatches[0]);
  17 }
  18
  19
  20 function getTotalMemoryMB()
  21 {
  22     $sCPU = file_get_contents('/proc/meminfo');
  23     preg_match('#MemTotal: +([0-9]+) kB#', $sCPU, $aMatches);
  24     return (int)($aMatches[1]/1024);
  25 }
  26
  27
  28 function getCacheMemoryMB()
  29 {
  30     $sCPU = file_get_contents('/proc/meminfo');
  31     preg_match('#Cached: +([0-9]+) kB#', $sCPU, $aMatches);
  32     return (int)($aMatches[1]/1024);
  33 }
  34
  35 function getDatabaseDate(&$oDB)
  36 {
  37     // Find the newest node in the DB
  38     $iLastOSMID = $oDB->getOne("select max(osm_id) from place where osm_type = 'N'");
  39     // Lookup the timestamp that node was created
  40     $sLastNodeURL = 'https://www.openstreetmap.org/api/0.6/node/'.$iLastOSMID.'/1';
  41     $sLastNodeXML = file_get_contents($sLastNodeURL);
  42
  43     if ($sLastNodeXML === false) {
  44         return false;
  45     }
  46
  47     preg_match('#timestamp="(([0-9]{4})-([0-9]{2})-([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})Z)"#', $sLastNodeXML, $aLastNodeDate);
  48
  49     return $aLastNodeDate[1];
  50 }
  51
  52
  53 function byImportance($a, $b)
  54 {
  55     if ($a['importance'] != $b['importance'])
  56         return ($a['importance'] > $b['importance']?-1:1);
  57
  58     return ($a['foundorder'] < $b['foundorder']?-1:1);
  59 }
  60
  61
  62 function javascript_renderData($xVal, $iOptions = 0)
  63 {
  64     $iOptions |= JSON_UNESCAPED_UNICODE;
  65     if (isset($_GET['pretty']) && in_array(strtolower($_GET['pretty']), array('1', 'true'))) {
  66         $iOptions |= JSON_PRETTY_PRINT;
  67     }
  68
  69     $jsonout = json_encode($xVal, $iOptions);
  70
  71     if (!isset($_GET['json_callback'])) {
  72         header('Content-Type: application/json; charset=UTF-8');
  73         echo $jsonout;
  74     } else {
  75         if (preg_match('/^[$_\p{L}][$_\p{L}\p{Nd}.[\]]*$/u', $_GET['json_callback'])) {
  76             header('Content-Type: application/javascript; charset=UTF-8');
  77             echo $_GET['json_callback'].'('.$jsonout.')';
  78         } else {
  79             header('HTTP/1.0 400 Bad Request');
  80         }
  81     }
  82 }
  83
  84 function addQuotes($s)
  85 {
  86     return "'".$s."'";
  87 }
  88
  89 function parseLatLon($sQuery)
  90 {
  91     $sFound    = null;
  92     $fQueryLat = null;
  93     $fQueryLon = null;
  94
  95     if (preg_match('/\\s*([NS])[ ]+([0-9]+[0-9.]*)[° ]+([0-9.]+)?[′\']*[, ]+([EW])[ ]+([0-9]+)[° ]+([0-9]+[0-9.]*)[′\']*\\s*/', $sQuery, $aData)) {
  96         /*               1         2                   3                    4         5            6
  97          * degrees decimal minutes
  98          * N 40 26.767, W 79 58.933
  99          * N 40°26.767′, W 79°58.933′
 100          */
 101         $sFound    = $aData[0];
 102         $fQueryLat = ($aData[1]=='N'?1:-1) * ($aData[2] + $aData[3]/60);
 103         $fQueryLon = ($aData[4]=='E'?1:-1) * ($aData[5] + $aData[6]/60);
 104     } elseif (preg_match('/\\s*([0-9]+)[° ]+([0-9]+[0-9.]*)?[′\']*[ ]+([NS])[, ]+([0-9]+)[° ]+([0-9]+[0-9.]*)?[′\' ]+([EW])\\s*/', $sQuery, $aData)) {
 105         /*                     1            2                         3          4            5                      6
 106          * degrees decimal minutes
 107          * 40 26.767 N, 79 58.933 W
 108          * 40° 26.767′ N 79° 58.933′ W
 109          */
 110         $sFound    = $aData[0];
 111         $fQueryLat = ($aData[3]=='N'?1:-1) * ($aData[1] + $aData[2]/60);
 112         $fQueryLon = ($aData[6]=='E'?1:-1) * ($aData[4] + $aData[5]/60);
 113     } elseif (preg_match('/\\s*([NS])[ ]([0-9]+)[° ]+([0-9]+)[′\' ]+([0-9]+)[″"]*[, ]+([EW])[ ]([0-9]+)[° ]+([0-9]+)[′\' ]+([0-9]+)[″"]*\\s*/', $sQuery, $aData)) {
 114         /*                     1        2            3              4                 5        6            7              8
 115          * degrees decimal seconds
 116          * N 40 26 46 W 79 58 56
 117          * N 40° 26′ 46″, W 79° 58′ 56″
 118          */
 119         $sFound    = $aData[0];
 120         $fQueryLat = ($aData[1]=='N'?1:-1) * ($aData[2] + $aData[3]/60 + $aData[4]/3600);
 121         $fQueryLon = ($aData[5]=='E'?1:-1) * ($aData[6] + $aData[7]/60 + $aData[8]/3600);
 122     } elseif (preg_match('/\\s*([0-9]+)[° ]+([0-9]+)[′\' ]+([0-9]+[0-9.]*)[″" ]+([NS])[, ]+([0-9]+)[° ]+([0-9]+)[′\' ]+([0-9]+[0-9.]*)[″" ]+([EW])\\s*/', $sQuery, $aData)) {
 123         /*                     1            2              3                    4          5            6              7                     8
 124          * degrees decimal seconds
 125          * 40 26 46 N 79 58 56 W
 126          * 40° 26′ 46″ N, 79° 58′ 56″ W
 127          * 40° 26′ 46.78″ N, 79° 58′ 56.89″ W
 128          */
 129         $sFound    = $aData[0];
 130         $fQueryLat = ($aData[4]=='N'?1:-1) * ($aData[1] + $aData[2]/60 + $aData[3]/3600);
 131         $fQueryLon = ($aData[8]=='E'?1:-1) * ($aData[5] + $aData[6]/60 + $aData[7]/3600);
 132     } elseif (preg_match('/\\s*([NS])[ ]([0-9]+[0-9]*\\.[0-9]+)[°]*[, ]+([EW])[ ]([0-9]+[0-9]*\\.[0-9]+)[°]*\\s*/', $sQuery, $aData)) {
 133         /*                     1        2                               3        4
 134          * degrees decimal
 135          * N 40.446° W 79.982°
 136          */
 137         $sFound    = $aData[0];
 138         $fQueryLat = ($aData[1]=='N'?1:-1) * ($aData[2]);
 139         $fQueryLon = ($aData[3]=='E'?1:-1) * ($aData[4]);
 140     } elseif (preg_match('/\\s*([0-9]+[0-9]*\\.[0-9]+)[° ]+([NS])[, ]+([0-9]+[0-9]*\\.[0-9]+)[° ]+([EW])\\s*/', $sQuery, $aData)) {
 141         /*                     1                           2          3                           4
 142          * degrees decimal
 143          * 40.446° N 79.982° W
 144          */
 145         $sFound    = $aData[0];
 146         $fQueryLat = ($aData[2]=='N'?1:-1) * ($aData[1]);
 147         $fQueryLon = ($aData[4]=='E'?1:-1) * ($aData[3]);
 148     } elseif (preg_match('/(\\s*\\[|^\\s*|\\s*)(-?[0-9]+[0-9]*\\.[0-9]+)[, ]+(-?[0-9]+[0-9]*\\.[0-9]+)(\\]\\s*|\\s*$|\\s*)/', $sQuery, $aData)) {
 149         /*                 1                   2                             3                        4
 150          * degrees decimal
 151          * 12.34, 56.78
 152          * 12.34 56.78
 153          * [12.456,-78.90]
 154          */
 155         $sFound    = $aData[0];
 156         $fQueryLat = $aData[2];
 157         $fQueryLon = $aData[3];
 158     } else {
 159         return false;
 160     }
 161
 162     return array($sFound, $fQueryLat, $fQueryLon);
 163 }
 164
 165
 166 function geometryText2Points($geometry_as_text, $fRadius)
 167 {
 168     $aPolyPoints = null;
 169     if (preg_match('#POLYGON\\(\\(([- 0-9.,]+)#', $geometry_as_text, $aMatch)) {
 170         //
 171         preg_match_all('/(-?[0-9.]+) (-?[0-9.]+)/', $aMatch[1], $aPolyPoints, PREG_SET_ORDER);
 172         //
 173     } elseif (preg_match('#LINESTRING\\(([- 0-9.,]+)#', $geometry_as_text, $aMatch)) {
 174         //
 175         preg_match_all('/(-?[0-9.]+) (-?[0-9.]+)/', $aMatch[1], $aPolyPoints, PREG_SET_ORDER);
 176         //
 177     } elseif (preg_match('#MULTIPOLYGON\\(\\(\\(([- 0-9.,]+)#', $geometry_as_text, $aMatch)) {
 178         //
 179         preg_match_all('/(-?[0-9.]+) (-?[0-9.]+)/', $aMatch[1], $aPolyPoints, PREG_SET_ORDER);
 180         //
 181     } elseif (preg_match('#POINT\\((-?[0-9.]+) (-?[0-9.]+)\\)#', $geometry_as_text, $aMatch)) {
 182         //
 183         $aPolyPoints = createPointsAroundCenter($aMatch[1], $aMatch[2], $fRadius);
 184         //
 185     }
 186
 187     if (isset($aPolyPoints)) {
 188         $aResultPoints = array();
 189         foreach ($aPolyPoints as $aPoint) {
 190             $aResultPoints[] = array($aPoint[1], $aPoint[2]);
 191         }
 192         return $aResultPoints;
 193     }
 194
 195     return;
 196 }
 197
 198 function createPointsAroundCenter($fLon, $fLat, $fRadius)
 199 {
 200     $iSteps = max(8, min(100, ($fRadius * 40000)^2));
 201     $fStepSize = (2*pi())/$iSteps;
 202     $aPolyPoints = array();
 203     for ($f = 0; $f < 2*pi(); $f += $fStepSize) {
 204         $aPolyPoints[] = array('', $fLon+($fRadius*sin($f)), $fLat+($fRadius*cos($f)) );
 205     }
 206     return $aPolyPoints;
 207 }
 208
 209 function closestHouseNumber($aRow)
 210 {
 211     $fHouse = $aRow['startnumber']
 212                 + ($aRow['endnumber'] - $aRow['startnumber']) * $aRow['fraction'];
 213
 214     switch ($aRow['interpolationtype']) {
 215         case 'odd':
 216             $iHn = (int)($fHouse/2) * 2 + 1;
 217             break;
 218         case 'even':
 219             $iHn = (int)(round($fHouse/2)) * 2;
 220             break;
 221         default:
 222             $iHn = (int)(round($fHouse));
 223             break;
 224     }
 225
 226     return max(min($aRow['endnumber'], $iHn), $aRow['startnumber']);
 227 }