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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * Base class for all GIS data type classes
 *
 * @package PhpMyAdmin-GIS
 */

namespace PMA\libraries\gis;

use \TCPDF;

/**
 * Base class for all GIS data type classes.
 *
 * @package PhpMyAdmin-GIS
 */
abstract class GISGeometry
{
    /**
     * Prepares and returns the code related to a row in the GIS dataset as SVG.
     *
     * @param string $spatial    GIS data object
     * @param string $label      label for the GIS data object
     * @param string $color      color for the GIS data object
     * @param array  $scale_data data related to scaling
     *
     * @return string the code related to a row in the GIS dataset
     * @access public
     */
    public abstract function prepareRowAsSvg($spatial, $label, $color, $scale_data);

    /**
     * Adds to the PNG image object, the data related to a row in the GIS dataset.
     *
     * @param string $spatial    GIS data object
     * @param string $label      label for the GIS data object
     * @param string $color      color for the GIS data object
     * @param array  $scale_data array containing data related to scaling
     * @param object $image      image object
     *
     * @return object the modified image object
     * @access public
     */
    public abstract function prepareRowAsPng(
        $spatial,
        $label,
        $color,
        $scale_data,
        $image
    );

    /**
     * Adds to the TCPDF instance, the data related to a row in the GIS dataset.
     *
     * @param string $spatial    GIS data object
     * @param string $label      label for the GIS data object
     * @param string $color      color for the GIS data 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 abstract function prepareRowAsPdf(
        $spatial,
        $label,
        $color,
        $scale_data,
        $pdf
    );

    /**
     * Prepares the JavaScript related to a row in the GIS dataset
     * to visualize it with OpenLayers.
     *
     * @param string $spatial    GIS data object
     * @param int    $srid       spatial reference ID
     * @param string $label      label for the GIS data object
     * @param string $color      color for the GIS data object
     * @param array  $scale_data array containing data related to scaling
     *
     * @return string the JavaScript related to a row in the GIS dataset
     * @access public
     */
    public abstract function prepareRowAsOl(
        $spatial,
        $srid,
        $label,
        $color,
        $scale_data
    );

    /**
     * Scales each row.
     *
     * @param string $spatial spatial data of a row
     *
     * @return array array containing the min, max values for x and y coordinates
     * @access public
     */
    public abstract function scaleRow($spatial);

    /**
     * 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 $empty    value for empty points
     *
     * @return string WKT with the set of parameters passed by the GIS editor
     * @access public
     */
    public abstract function generateWkt($gis_data, $index, $empty = '');

    /**
     * Returns OpenLayers.Bounds object that correspond to the bounds of GIS data.
     *
     * @param string $srid       spatial reference ID
     * @param array  $scale_data data related to scaling
     *
     * @return string OpenLayers.Bounds object that
     *                correspond to the bounds of GIS data
     * @access protected
     */
    protected function getBoundsForOl($srid, $scale_data)
    {
        return 'bound = new OpenLayers.Bounds(); '
        . 'bound.extend(new OpenLayers.LonLat('
        . $scale_data['minX'] . ', ' . $scale_data['minY']
        . ').transform(new OpenLayers.Projection("EPSG:'
        . intval($srid) . '"), map.getProjectionObject())); '
        . 'bound.extend(new OpenLayers.LonLat('
        . $scale_data['maxX'] . ', ' . $scale_data['maxY']
        . ').transform(new OpenLayers.Projection("EPSG:'
        . intval($srid) . '"), map.getProjectionObject()));';
    }

    /**
     * Updates the min, max values with the given point set.
     *
     * @param string $point_set point set
     * @param array  $min_max   existing min, max values
     *
     * @return array the updated min, max values
     * @access protected
     */
    protected function setMinMax($point_set, $min_max)
    {
        // Separate each point
        $points = explode(",", $point_set);

        foreach ($points as $point) {
            // Extract coordinates of the point
            $cordinates = explode(" ", $point);

            $x = (float)$cordinates[0];
            if (!isset($min_max['maxX']) || $x > $min_max['maxX']) {
                $min_max['maxX'] = $x;
            }
            if (!isset($min_max['minX']) || $x < $min_max['minX']) {
                $min_max['minX'] = $x;
            }
            $y = (float)$cordinates[1];
            if (!isset($min_max['maxY']) || $y > $min_max['maxY']) {
                $min_max['maxY'] = $y;
            }
            if (!isset($min_max['minY']) || $y < $min_max['minY']) {
                $min_max['minY'] = $y;
            }
        }

        return $min_max;
    }

    /**
     * Generates parameters for the GIS data editor from the value of the GIS column.
     * This method performs common work.
     * More specific work is performed by each of the geom classes.
     *
     * @param string $value value of the GIS column
     *
     * @return array parameters for the GIS editor from the value of the GIS column
     * @access protected
     */
    protected function generateParams($value)
    {
        $geom_types = '(POINT|MULTIPOINT|LINESTRING|MULTILINESTRING'
            . '|POLYGON|MULTIPOLYGON|GEOMETRYCOLLECTION)';
        $srid = 0;
        $wkt = '';

        if (preg_match("/^'" . $geom_types . "\(.*\)',[0-9]*$/i", $value)) {
            $last_comma = mb_strripos($value, ",");
            $srid = trim(mb_substr($value, $last_comma + 1));
            $wkt = trim(mb_substr($value, 1, $last_comma - 2));
        } elseif (preg_match("/^" . $geom_types . "\(.*\)$/i", $value)) {
            $wkt = $value;
        }

        return array('srid' => $srid, 'wkt' => $wkt);
    }

    /**
     * Extracts points, scales and returns them as an array.
     *
     * @param string  $point_set  string of comma separated points
     * @param array   $scale_data data related to scaling
     * @param boolean $linear     if true, as a 1D array, else as a 2D array
     *
     * @return array scaled points
     * @access protected
     */
    protected function extractPoints($point_set, $scale_data, $linear = false)
    {
        $points_arr = array();

        // Separate each point
        $points = explode(",", $point_set);

        foreach ($points as $point) {
            // Extract coordinates of the point
            $cordinates = explode(" ", $point);

            if (!empty($cordinates[0]) && trim($cordinates[0]) != ''
                && isset($cordinates[1])
                && trim($cordinates[1]) != ''
            ) {
                if ($scale_data != null) {
                    $x = ($cordinates[0] - $scale_data['x']) * $scale_data['scale'];
                    $y = $scale_data['height']
                        - ($cordinates[1] - $scale_data['y']) * $scale_data['scale'];
                } else {
                    $x = floatval(trim($cordinates[0]));
                    $y = floatval(trim($cordinates[1]));
                }
            } else {
                $x = '';
                $y = '';
            }

            if (!$linear) {
                $points_arr[] = array($x, $y);
            } else {
                $points_arr[] = $x;
                $points_arr[] = $y;
            }
        }

        return $points_arr;
    }

    /**
     * Generates JavaScript for adding an array of polygons to OpenLayers.
     *
     * @param array  $polygons x and y coordinates for each polygon
     * @param string $srid     spatial reference id
     *
     * @return string JavaScript for adding an array of polygons to OpenLayers
     * @access protected
     */
    protected function getPolygonArrayForOpenLayers($polygons, $srid)
    {
        $ol_array = 'new Array(';
        foreach ($polygons as $polygon) {
            $rings = explode("),(", $polygon);
            $ol_array .= $this->getPolygonForOpenLayers($rings, $srid) . ', ';
        }

        $ol_array
            = mb_substr(
                $ol_array,
                0,
                mb_strlen($ol_array) - 2
            );
        $ol_array .= ')';

        return $ol_array;
    }

    /**
     * Generates JavaScript for adding points for OpenLayers polygon.
     *
     * @param array  $polygon x and y coordinates for each line
     * @param string $srid    spatial reference id
     *
     * @return string JavaScript for adding points for OpenLayers polygon
     * @access protected
     */
    protected function getPolygonForOpenLayers($polygon, $srid)
    {
        return 'new OpenLayers.Geometry.Polygon('
        . $this->getLineArrayForOpenLayers($polygon, $srid, false)
        . ')';
    }

    /**
     * Generates JavaScript for adding an array of LineString
     * or LineRing to OpenLayers.
     *
     * @param array  $lines          x and y coordinates for each line
     * @param string $srid           spatial reference id
     * @param bool   $is_line_string whether it's an array of LineString
     *
     * @return string JavaScript for adding an array of LineString
     *                or LineRing to OpenLayers
     * @access protected
     */
    protected function getLineArrayForOpenLayers(
        $lines,
        $srid,
        $is_line_string = true
    ) {
        $ol_array = 'new Array(';
        foreach ($lines as $line) {
            $points_arr = $this->extractPoints($line, null);
            $ol_array .= $this->getLineForOpenLayers(
                $points_arr,
                $srid,
                $is_line_string
            );
            $ol_array .= ', ';
        }

        $ol_array
            = mb_substr(
                $ol_array,
                0,
                mb_strlen($ol_array) - 2
            );
        $ol_array .= ')';

        return $ol_array;
    }

    /**
     * Generates JavaScript for adding a LineString or LineRing to OpenLayers.
     *
     * @param array  $points_arr     x and y coordinates for each point
     * @param string $srid           spatial reference id
     * @param bool   $is_line_string whether it's a LineString
     *
     * @return string JavaScript for adding a LineString or LineRing to OpenLayers
     * @access protected
     */
    protected function getLineForOpenLayers(
        $points_arr,
        $srid,
        $is_line_string = true
    ) {
        return 'new OpenLayers.Geometry.'
        . ($is_line_string ? 'LineString' : 'LinearRing') . '('
        . $this->getPointsArrayForOpenLayers($points_arr, $srid)
        . ')';
    }

    /**
     * Generates JavaScript for adding an array of points to OpenLayers.
     *
     * @param array  $points_arr x and y coordinates for each point
     * @param string $srid       spatial reference id
     *
     * @return string JavaScript for adding an array of points to OpenLayers
     * @access protected
     */
    protected function getPointsArrayForOpenLayers($points_arr, $srid)
    {
        $ol_array = 'new Array(';
        foreach ($points_arr as $point) {
            $ol_array .= $this->getPointForOpenLayers($point, $srid) . ', ';
        }

        $ol_array
            = mb_substr(
                $ol_array,
                0,
                mb_strlen($ol_array) - 2
            );
        $ol_array .= ')';

        return $ol_array;
    }

    /**
     * Generates JavaScript for adding a point to OpenLayers.
     *
     * @param array  $point array containing the x and y coordinates of the point
     * @param string $srid  spatial reference id
     *
     * @return string JavaScript for adding points to OpenLayers
     * @access protected
     */
    protected function getPointForOpenLayers($point, $srid)
    {
        return '(new OpenLayers.Geometry.Point(' . $point[0] . ',' . $point[1] . '))'
        . '.transform(new OpenLayers.Projection("EPSG:'
        . intval($srid) . '"), map.getProjectionObject())';
    }
}

Filemanager

Name Type Size Permission Actions
GISFactory.php File 1.31 KB 0644
GISGeometry.php File 12.36 KB 0644
GISGeometrycollection.php File 12.31 KB 0644
GISLinestring.php File 10.66 KB 0644
GISMultilinestring.php File 13.59 KB 0644
GISMultipoint.php File 12.37 KB 0644
GISMultipolygon.php File 19.63 KB 0644
GISPoint.php File 10.39 KB 0644
GISPolygon.php File 18.88 KB 0644
GISVisualization.php File 20.09 KB 0644