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<?php /* vim: set expandtab sw=4 ts=4 sts=4: */ /** * Handles actions related to GIS GEOMETRYCOLLECTION objects * * @package PhpMyAdmin-GIS */ declare(strict_types=1); namespace PhpMyAdmin\Gis; use TCPDF; /** * Handles actions related to GIS GEOMETRYCOLLECTION objects * * @package PhpMyAdmin-GIS */ class GisGeometryCollection extends GisGeometry { // Hold the singleton instance of the class private static $_instance; /** * A private constructor; prevents direct creation of object. * * @access private */ private function __construct() { } /** * Returns the singleton. * * @return GisGeometryCollection the singleton * @access public */ public static function singleton() { if (! isset(self::$_instance)) { self::$_instance = new GisGeometryCollection(); } return self::$_instance; } /** * Scales each row. * * @param string $spatial spatial data of a row * * @return array array containing the min, max values for x and y coordinates * @access public */ public function scaleRow($spatial) { $min_max = []; // Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')' $goem_col = mb_substr( $spatial, 19, mb_strlen($spatial) - 20 ); // Split the geometry collection object to get its constituents. $sub_parts = $this->_explodeGeomCol($goem_col); foreach ($sub_parts as $sub_part) { $type_pos = mb_strpos($sub_part, '('); if ($type_pos === false) { continue; } $type = mb_substr($sub_part, 0, $type_pos); $gis_obj = GisFactory::factory($type); if (! $gis_obj) { continue; } $scale_data = $gis_obj->scaleRow($sub_part); // Update minimum/maximum values for x and y coordinates. $c_maxX = (float) $scale_data['maxX']; if (! isset($min_max['maxX']) || $c_maxX > $min_max['maxX']) { $min_max['maxX'] = $c_maxX; } $c_minX = (float) $scale_data['minX']; if (! isset($min_max['minX']) || $c_minX < $min_max['minX']) { $min_max['minX'] = $c_minX; } $c_maxY = (float) $scale_data['maxY']; if (! isset($min_max['maxY']) || $c_maxY > $min_max['maxY']) { $min_max['maxY'] = $c_maxY; } $c_minY = (float) $scale_data['minY']; if (! isset($min_max['minY']) || $c_minY < $min_max['minY']) { $min_max['minY'] = $c_minY; } } return $min_max; } /** * Adds to the PNG image object, the data related to a row in the GIS dataset. * * @param string $spatial GIS POLYGON object * @param string|null $label Label for the GIS POLYGON object * @param string $color Color for the GIS POLYGON object * @param array $scale_data Array containing data related to scaling * @param resource $image Image object * * @return resource the modified image object * @access public */ public function prepareRowAsPng($spatial, ?string $label, $color, array $scale_data, $image) { // Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')' $goem_col = mb_substr( $spatial, 19, mb_strlen($spatial) - 20 ); // Split the geometry collection object to get its constituents. $sub_parts = $this->_explodeGeomCol($goem_col); foreach ($sub_parts as $sub_part) { $type_pos = mb_strpos($sub_part, '('); if ($type_pos === false) { continue; } $type = mb_substr($sub_part, 0, $type_pos); $gis_obj = GisFactory::factory($type); if (! $gis_obj) { continue; } $image = $gis_obj->prepareRowAsPng( $sub_part, $label, $color, $scale_data, $image ); } return $image; } /** * Adds to the TCPDF instance, the data related to a row in the GIS dataset. * * @param string $spatial GIS GEOMETRYCOLLECTION object * @param string|null $label label for the GIS GEOMETRYCOLLECTION object * @param string $color color for the GIS GEOMETRYCOLLECTION object * @param array $scale_data array containing data related to scaling * @param TCPDF $pdf TCPDF instance * * @return TCPDF the modified TCPDF instance * @access public */ public function prepareRowAsPdf($spatial, ?string $label, $color, array $scale_data, $pdf) { // Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')' $goem_col = mb_substr( $spatial, 19, mb_strlen($spatial) - 20 ); // Split the geometry collection object to get its constituents. $sub_parts = $this->_explodeGeomCol($goem_col); foreach ($sub_parts as $sub_part) { $type_pos = mb_strpos($sub_part, '('); if ($type_pos === false) { continue; } $type = mb_substr($sub_part, 0, $type_pos); $gis_obj = GisFactory::factory($type); if (! $gis_obj) { continue; } $pdf = $gis_obj->prepareRowAsPdf( $sub_part, $label, $color, $scale_data, $pdf ); } return $pdf; } /** * Prepares and returns the code related to a row in the GIS dataset as SVG. * * @param string $spatial GIS GEOMETRYCOLLECTION object * @param string $label label for the GIS GEOMETRYCOLLECTION object * @param string $color color for the GIS GEOMETRYCOLLECTION object * @param array $scale_data array containing data related to scaling * * @return string the code related to a row in the GIS dataset * @access public */ public function prepareRowAsSvg($spatial, $label, $color, array $scale_data) { $row = ''; // Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')' $goem_col = mb_substr( $spatial, 19, mb_strlen($spatial) - 20 ); // Split the geometry collection object to get its constituents. $sub_parts = $this->_explodeGeomCol($goem_col); foreach ($sub_parts as $sub_part) { $type_pos = mb_strpos($sub_part, '('); if ($type_pos === false) { continue; } $type = mb_substr($sub_part, 0, $type_pos); $gis_obj = GisFactory::factory($type); if (! $gis_obj) { continue; } $row .= $gis_obj->prepareRowAsSvg( $sub_part, $label, $color, $scale_data ); } return $row; } /** * Prepares JavaScript related to a row in the GIS dataset * to visualize it with OpenLayers. * * @param string $spatial GIS GEOMETRYCOLLECTION object * @param int $srid spatial reference ID * @param string $label label for the GIS GEOMETRYCOLLECTION object * @param string $color color for the GIS GEOMETRYCOLLECTION object * @param array $scale_data array containing data related to scaling * * @return string JavaScript related to a row in the GIS dataset * @access public */ public function prepareRowAsOl($spatial, $srid, $label, $color, array $scale_data) { $row = ''; // Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')' $goem_col = mb_substr( $spatial, 19, mb_strlen($spatial) - 20 ); // Split the geometry collection object to get its constituents. $sub_parts = $this->_explodeGeomCol($goem_col); foreach ($sub_parts as $sub_part) { $type_pos = mb_strpos($sub_part, '('); if ($type_pos === false) { continue; } $type = mb_substr($sub_part, 0, $type_pos); $gis_obj = GisFactory::factory($type); if (! $gis_obj) { continue; } $row .= $gis_obj->prepareRowAsOl( $sub_part, $srid, $label, $color, $scale_data ); } return $row; } /** * Splits the GEOMETRYCOLLECTION object and get its constituents. * * @param string $geom_col geometry collection string * * @return array the constituents of the geometry collection object * @access private */ private function _explodeGeomCol($geom_col) { $sub_parts = []; $br_count = 0; $start = 0; $count = 0; foreach (str_split($geom_col) as $char) { if ($char == '(') { $br_count++; } elseif ($char == ')') { $br_count--; if ($br_count == 0) { $sub_parts[] = mb_substr( $geom_col, $start, $count + 1 - $start ); $start = $count + 2; } } $count++; } return $sub_parts; } /** * Generates the WKT with the set of parameters passed by the GIS editor. * * @param array $gis_data GIS data * @param int $index index into the parameter object * @param string $empty value for empty points * * @return string WKT with the set of parameters passed by the GIS editor * @access public */ public function generateWkt(array $gis_data, $index, $empty = '') { $geom_count = isset($gis_data['GEOMETRYCOLLECTION']['geom_count']) ? $gis_data['GEOMETRYCOLLECTION']['geom_count'] : 1; $wkt = 'GEOMETRYCOLLECTION('; for ($i = 0; $i < $geom_count; $i++) { if (isset($gis_data[$i]['gis_type'])) { $type = $gis_data[$i]['gis_type']; $gis_obj = GisFactory::factory($type); if (! $gis_obj) { continue; } $wkt .= $gis_obj->generateWkt($gis_data, $i, $empty) . ','; } } if (isset($gis_data[0]['gis_type'])) { $wkt = mb_substr( $wkt, 0, mb_strlen($wkt) - 1 ); } $wkt .= ')'; return $wkt; } /** * Generates parameters for the GIS data editor from the value of the GIS column. * * @param string $value of the GIS column * * @return array parameters for the GIS editor from the value of the GIS column * @access public */ public function generateParams($value) { $params = []; $data = GisGeometry::generateParams($value); $params['srid'] = $data['srid']; $wkt = $data['wkt']; // Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')' $goem_col = mb_substr( $wkt, 19, mb_strlen($wkt) - 20 ); // Split the geometry collection object to get its constituents. $sub_parts = $this->_explodeGeomCol($goem_col); $params['GEOMETRYCOLLECTION']['geom_count'] = count($sub_parts); $i = 0; foreach ($sub_parts as $sub_part) { $type_pos = mb_strpos($sub_part, '('); if ($type_pos === false) { continue; } $type = mb_substr($sub_part, 0, $type_pos); /** * @var GisMultiPolygon|GisPolygon|GisMultiPoint|GisPoint|GisMultiLineString|GisLineString $gis_obj */ $gis_obj = GisFactory::factory($type); if (! $gis_obj) { continue; } $params = array_merge($params, $gis_obj->generateParams($sub_part, $i)); $i++; } return $params; } }