phpmyadmin working

1 files changed, 618 insertions, 0 deletions

diff --git a/srcs/phpmyadmin/libraries/classes/Gis/GisPolygon.php b/srcs/phpmyadmin/libraries/classes/Gis/GisPolygon.php
new file mode 100644
index 0000000..b44da07
--- /dev/null
+++ b/srcs/phpmyadmin/libraries/classes/Gis/GisPolygon.php
@@ -0,0 +1,618 @@
+<?php
+/* vim: set expandtab sw=4 ts=4 sts=4: */
+/**
+ * Handles actions related to GIS POLYGON objects
+ *
+ * @package PhpMyAdmin-GIS
+ */
+declare(strict_types=1);
+
+namespace PhpMyAdmin\Gis;
+
+use TCPDF;
+
+/**
+ * Handles actions related to GIS POLYGON objects
+ *
+ * @package PhpMyAdmin-GIS
+ */
+class GisPolygon extends GisGeometry
+{
+    // Hold the singleton instance of the class
+    private static $_instance;
+
+    /**
+     * A private constructor; prevents direct creation of object.
+     *
+     * @access private
+     */
+    private function __construct()
+    {
+    }
+
+    /**
+     * Returns the singleton.
+     *
+     * @return GisPolygon the singleton
+     * @access public
+     */
+    public static function singleton()
+    {
+        if (! isset(self::$_instance)) {
+            self::$_instance = new GisPolygon();
+        }
+
+        return self::$_instance;
+    }
+
+    /**
+     * Scales each row.
+     *
+     * @param string $spatial spatial data of a row
+     *
+     * @return array an array containing the min, max values for x and y coordinates
+     * @access public
+     */
+    public function scaleRow($spatial)
+    {
+        // Trim to remove leading 'POLYGON((' and trailing '))'
+        $polygon = mb_substr(
+            $spatial,
+            9,
+            mb_strlen($spatial) - 11
+        );
+
+        // If the polygon doesn't have an inner ring, use polygon itself
+        if (mb_strpos($polygon, "),(") === false) {
+            $ring = $polygon;
+        } else {
+            // Separate outer ring and use it to determine min-max
+            $parts = explode("),(", $polygon);
+            $ring = $parts[0];
+        }
+
+        return $this->setMinMax($ring, []);
+    }
+
+    /**
+     * 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      $fill_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,
+        $fill_color,
+        array $scale_data,
+        $image
+    ) {
+        // allocate colors
+        $black = imagecolorallocate($image, 0, 0, 0);
+        $red = hexdec(mb_substr($fill_color, 1, 2));
+        $green = hexdec(mb_substr($fill_color, 3, 2));
+        $blue = hexdec(mb_substr($fill_color, 4, 2));
+        $color = imagecolorallocate($image, $red, $green, $blue);
+
+        // Trim to remove leading 'POLYGON((' and trailing '))'
+        $polygon = mb_substr(
+            $spatial,
+            9,
+            mb_strlen($spatial) - 11
+        );
+
+        // If the polygon doesn't have an inner polygon
+        if (mb_strpos($polygon, "),(") === false) {
+            $points_arr = $this->extractPoints($polygon, $scale_data, true);
+        } else {
+            // Separate outer and inner polygons
+            $parts = explode("),(", $polygon);
+            $outer = $parts[0];
+            $inner = array_slice($parts, 1);
+
+            $points_arr = $this->extractPoints($outer, $scale_data, true);
+
+            foreach ($inner as $inner_poly) {
+                $points_arr = array_merge(
+                    $points_arr,
+                    $this->extractPoints($inner_poly, $scale_data, true)
+                );
+            }
+        }
+
+        // draw polygon
+        imagefilledpolygon($image, $points_arr, count($points_arr) / 2, $color);
+        // print label if applicable
+        if (isset($label) && trim($label) != '') {
+            imagestring(
+                $image,
+                1,
+                $points_arr[2],
+                $points_arr[3],
+                trim($label),
+                $black
+            );
+        }
+
+        return $image;
+    }
+
+    /**
+     * Adds to the TCPDF instance, 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      $fill_color Color for the GIS POLYGON 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, $fill_color, array $scale_data, $pdf)
+    {
+        // allocate colors
+        $red = hexdec(mb_substr($fill_color, 1, 2));
+        $green = hexdec(mb_substr($fill_color, 3, 2));
+        $blue = hexdec(mb_substr($fill_color, 4, 2));
+        $color = [
+            $red,
+            $green,
+            $blue,
+        ];
+
+        // Trim to remove leading 'POLYGON((' and trailing '))'
+        $polygon = mb_substr(
+            $spatial,
+            9,
+            mb_strlen($spatial) - 11
+        );
+
+        // If the polygon doesn't have an inner polygon
+        if (mb_strpos($polygon, "),(") === false) {
+            $points_arr = $this->extractPoints($polygon, $scale_data, true);
+        } else {
+            // Separate outer and inner polygons
+            $parts = explode("),(", $polygon);
+            $outer = $parts[0];
+            $inner = array_slice($parts, 1);
+
+            $points_arr = $this->extractPoints($outer, $scale_data, true);
+
+            foreach ($inner as $inner_poly) {
+                $points_arr = array_merge(
+                    $points_arr,
+                    $this->extractPoints($inner_poly, $scale_data, true)
+                );
+            }
+        }
+
+        // draw polygon
+        $pdf->Polygon($points_arr, 'F*', [], $color, true);
+        // print label if applicable
+        if (isset($label) && trim($label) != '') {
+            $pdf->SetXY($points_arr[2], $points_arr[3]);
+            $pdf->SetFontSize(5);
+            $pdf->Cell(0, 0, trim($label));
+        }
+
+        return $pdf;
+    }
+
+    /**
+     * Prepares and returns the code related to a row in the GIS dataset as SVG.
+     *
+     * @param string $spatial    GIS POLYGON object
+     * @param string $label      Label for the GIS POLYGON object
+     * @param string $fill_color Color for the GIS POLYGON 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, $fill_color, array $scale_data)
+    {
+        $polygon_options = [
+            'name'         => $label,
+            'id'           => $label . mt_rand(),
+            'class'        => 'polygon vector',
+            'stroke'       => 'black',
+            'stroke-width' => 0.5,
+            'fill'         => $fill_color,
+            'fill-rule'    => 'evenodd',
+            'fill-opacity' => 0.8,
+        ];
+
+        // Trim to remove leading 'POLYGON((' and trailing '))'
+        $polygon
+            = mb_substr(
+                $spatial,
+                9,
+                mb_strlen($spatial) - 11
+            );
+
+        $row = '<path d="';
+
+        // If the polygon doesn't have an inner polygon
+        if (mb_strpos($polygon, "),(") === false) {
+            $row .= $this->_drawPath($polygon, $scale_data);
+        } else {
+            // Separate outer and inner polygons
+            $parts = explode("),(", $polygon);
+            $outer = $parts[0];
+            $inner = array_slice($parts, 1);
+
+            $row .= $this->_drawPath($outer, $scale_data);
+
+            foreach ($inner as $inner_poly) {
+                $row .= $this->_drawPath($inner_poly, $scale_data);
+            }
+        }
+
+        $row .= '"';
+        foreach ($polygon_options as $option => $val) {
+            $row .= ' ' . $option . '="' . trim((string) $val) . '"';
+        }
+        $row .= '/>';
+
+        return $row;
+    }
+
+    /**
+     * Prepares JavaScript related to a row in the GIS dataset
+     * to visualize it with OpenLayers.
+     *
+     * @param string $spatial    GIS POLYGON object
+     * @param int    $srid       Spatial reference ID
+     * @param string $label      Label for the GIS POLYGON object
+     * @param string $fill_color Color for the GIS POLYGON 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, $fill_color, array $scale_data)
+    {
+        $style_options = [
+            'strokeColor' => '#000000',
+            'strokeWidth' => 0.5,
+            'fillColor'   => $fill_color,
+            'fillOpacity' => 0.8,
+            'label'       => $label,
+            'fontSize'    => 10,
+        ];
+        if ($srid == 0) {
+            $srid = 4326;
+        }
+        $row = $this->getBoundsForOl($srid, $scale_data);
+
+        // Trim to remove leading 'POLYGON((' and trailing '))'
+        $polygon
+            =
+            mb_substr(
+                $spatial,
+                9,
+                mb_strlen($spatial) - 11
+            );
+
+        // Separate outer and inner polygons
+        $parts = explode("),(", $polygon);
+        $row .= 'vectorLayer.addFeatures(new OpenLayers.Feature.Vector('
+            . $this->getPolygonForOpenLayers($parts, $srid)
+            . ', null, ' . json_encode($style_options) . '));';
+
+        return $row;
+    }
+
+    /**
+     * Draws a ring of the polygon using SVG path element.
+     *
+     * @param string $polygon    The ring
+     * @param array  $scale_data Array containing data related to scaling
+     *
+     * @return string the code to draw the ring
+     * @access private
+     */
+    private function _drawPath($polygon, array $scale_data)
+    {
+        $points_arr = $this->extractPoints($polygon, $scale_data);
+
+        $row = ' M ' . $points_arr[0][0] . ', ' . $points_arr[0][1];
+        $other_points = array_slice($points_arr, 1, count($points_arr) - 2);
+        foreach ($other_points as $point) {
+            $row .= ' L ' . $point[0] . ', ' . $point[1];
+        }
+        $row .= ' Z ';
+
+        return $row;
+    }
+
+    /**
+     * Generate 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 = '')
+    {
+        $no_of_lines = isset($gis_data[$index]['POLYGON']['no_of_lines'])
+            ? $gis_data[$index]['POLYGON']['no_of_lines'] : 1;
+        if ($no_of_lines < 1) {
+            $no_of_lines = 1;
+        }
+
+        $wkt = 'POLYGON(';
+        for ($i = 0; $i < $no_of_lines; $i++) {
+            $no_of_points = isset($gis_data[$index]['POLYGON'][$i]['no_of_points'])
+                ? $gis_data[$index]['POLYGON'][$i]['no_of_points'] : 4;
+            if ($no_of_points < 4) {
+                $no_of_points = 4;
+            }
+            $wkt .= '(';
+            for ($j = 0; $j < $no_of_points; $j++) {
+                $wkt .= ((isset($gis_data[$index]['POLYGON'][$i][$j]['x'])
+                        && trim((string) $gis_data[$index]['POLYGON'][$i][$j]['x']) != '')
+                        ? $gis_data[$index]['POLYGON'][$i][$j]['x'] : $empty)
+                    . ' ' . ((isset($gis_data[$index]['POLYGON'][$i][$j]['y'])
+                        && trim((string) $gis_data[$index]['POLYGON'][$i][$j]['y']) != '')
+                        ? $gis_data[$index]['POLYGON'][$i][$j]['y'] : $empty) . ',';
+            }
+            $wkt
+                =
+                mb_substr(
+                    $wkt,
+                    0,
+                    mb_strlen($wkt) - 1
+                );
+            $wkt .= '),';
+        }
+        $wkt
+            =
+            mb_substr(
+                $wkt,
+                0,
+                mb_strlen($wkt) - 1
+            );
+        $wkt .= ')';
+
+        return $wkt;
+    }
+
+    /**
+     * Calculates the area of a closed simple polygon.
+     *
+     * @param array $ring array of points forming the ring
+     *
+     * @return float the area of a closed simple polygon
+     * @access public
+     * @static
+     */
+    public static function area(array $ring)
+    {
+
+        $no_of_points = count($ring);
+
+        // If the last point is same as the first point ignore it
+        $last = count($ring) - 1;
+        if (($ring[0]['x'] == $ring[$last]['x'])
+            && ($ring[0]['y'] == $ring[$last]['y'])
+        ) {
+            $no_of_points--;
+        }
+
+        //         _n-1
+        // A = _1_ \    (X(i) * Y(i+1)) - (Y(i) * X(i+1))
+        //      2  /__
+        //         i=0
+        $area = 0;
+        for ($i = 0; $i < $no_of_points; $i++) {
+            $j = ($i + 1) % $no_of_points;
+            $area += $ring[$i]['x'] * $ring[$j]['y'];
+            $area -= $ring[$i]['y'] * $ring[$j]['x'];
+        }
+        $area /= 2.0;
+
+        return $area;
+    }
+
+    /**
+     * Determines whether a set of points represents an outer ring.
+     * If points are in clockwise orientation then, they form an outer ring.
+     *
+     * @param array $ring array of points forming the ring
+     *
+     * @return bool whether a set of points represents an outer ring
+     * @access public
+     * @static
+     */
+    public static function isOuterRing(array $ring)
+    {
+        // If area is negative then it's in clockwise orientation,
+        // i.e. it's an outer ring
+        return GisPolygon::area($ring) < 0;
+    }
+
+    /**
+     * Determines whether a given point is inside a given polygon.
+     *
+     * @param array $point   x, y coordinates of the point
+     * @param array $polygon array of points forming the ring
+     *
+     * @return bool whether a given point is inside a given polygon
+     * @access public
+     * @static
+     */
+    public static function isPointInsidePolygon(array $point, array $polygon)
+    {
+        // If first point is repeated at the end remove it
+        $last = count($polygon) - 1;
+        if (($polygon[0]['x'] == $polygon[$last]['x'])
+            && ($polygon[0]['y'] == $polygon[$last]['y'])
+        ) {
+            $polygon = array_slice($polygon, 0, $last);
+        }
+
+        $no_of_points = count($polygon);
+        $counter = 0;
+
+        // Use ray casting algorithm
+        $p1 = $polygon[0];
+        for ($i = 1; $i <= $no_of_points; $i++) {
+            $p2 = $polygon[$i % $no_of_points];
+            if ($point['y'] <= min([$p1['y'], $p2['y']])) {
+                $p1 = $p2;
+                continue;
+            }
+
+            if ($point['y'] > max([$p1['y'], $p2['y']])) {
+                $p1 = $p2;
+                continue;
+            }
+
+            if ($point['x'] > max([$p1['x'], $p2['x']])) {
+                $p1 = $p2;
+                continue;
+            }
+
+            if ($p1['y'] != $p2['y']) {
+                $xinters = ($point['y'] - $p1['y'])
+                    * ($p2['x'] - $p1['x'])
+                    / ($p2['y'] - $p1['y']) + $p1['x'];
+                if ($p1['x'] == $p2['x'] || $point['x'] <= $xinters) {
+                    $counter++;
+                }
+            }
+
+            $p1 = $p2;
+        }
+
+        return $counter % 2 != 0;
+    }
+
+    /**
+     * Returns a point that is guaranteed to be on the surface of the ring.
+     * (for simple closed rings)
+     *
+     * @param array $ring array of points forming the ring
+     *
+     * @return array|bool a point on the surface of the ring
+     * @access public
+     * @static
+     */
+    public static function getPointOnSurface(array $ring)
+    {
+        $x0 = null;
+        $x1 = null;
+        $y0 = null;
+        $y1 = null;
+        // Find two consecutive distinct points.
+        for ($i = 0, $nb = count($ring) - 1; $i < $nb; $i++) {
+            if ($ring[$i]['y'] != $ring[$i + 1]['y']) {
+                $x0 = $ring[$i]['x'];
+                $x1 = $ring[$i + 1]['x'];
+                $y0 = $ring[$i]['y'];
+                $y1 = $ring[$i + 1]['y'];
+                break;
+            }
+        }
+
+        if (! isset($x0)) {
+            return false;
+        }
+
+        // Find the mid point
+        $x2 = ($x0 + $x1) / 2;
+        $y2 = ($y0 + $y1) / 2;
+
+        // Always keep $epsilon < 1 to go with the reduction logic down here
+        $epsilon = 0.1;
+        $denominator = sqrt(pow($y1 - $y0, 2) + pow($x0 - $x1, 2));
+        $pointA = [];
+        $pointB = [];
+
+        while (true) {
+            // Get the points on either sides of the line
+            // with a distance of epsilon to the mid point
+            $pointA['x'] = $x2 + ($epsilon * ($y1 - $y0)) / $denominator;
+            $pointA['y'] = $y2 + ($pointA['x'] - $x2) * ($x0 - $x1) / ($y1 - $y0);
+
+            $pointB['x'] = $x2 + ($epsilon * ($y1 - $y0)) / (0 - $denominator);
+            $pointB['y'] = $y2 + ($pointB['x'] - $x2) * ($x0 - $x1) / ($y1 - $y0);
+
+            // One of the points should be inside the polygon,
+            // unless epsilon chosen is too large
+            if (GisPolygon::isPointInsidePolygon($pointA, $ring)) {
+                return $pointA;
+            }
+
+            if (GisPolygon::isPointInsidePolygon($pointB, $ring)) {
+                return $pointB;
+            }
+
+            //If both are outside the polygon reduce the epsilon and
+            //recalculate the points(reduce exponentially for faster convergence)
+            $epsilon = pow($epsilon, 2);
+            if ($epsilon == 0) {
+                return false;
+            }
+        }
+    }
+
+    /** Generate parameters for the GIS data editor from the value of the GIS column.
+     *
+     * @param string $value Value of the GIS column
+     * @param int    $index Index of the geometry
+     *
+     * @return array params for the GIS data editor from the value of the GIS column
+     * @access public
+     */
+    public function generateParams($value, $index = -1)
+    {
+        $params = [];
+        if ($index == -1) {
+            $index = 0;
+            $data = GisGeometry::generateParams($value);
+            $params['srid'] = $data['srid'];
+            $wkt = $data['wkt'];
+        } else {
+            $params[$index]['gis_type'] = 'POLYGON';
+            $wkt = $value;
+        }
+
+        // Trim to remove leading 'POLYGON((' and trailing '))'
+        $polygon
+            =
+            mb_substr(
+                $wkt,
+                9,
+                mb_strlen($wkt) - 11
+            );
+        // Separate each linestring
+        $linerings = explode("),(", $polygon);
+        $params[$index]['POLYGON']['no_of_lines'] = count($linerings);
+
+        $j = 0;
+        foreach ($linerings as $linering) {
+            $points_arr = $this->extractPoints($linering, null);
+            $no_of_points = count($points_arr);
+            $params[$index]['POLYGON'][$j]['no_of_points'] = $no_of_points;
+            for ($i = 0; $i < $no_of_points; $i++) {
+                $params[$index]['POLYGON'][$j][$i]['x'] = $points_arr[$i][0];
+                $params[$index]['POLYGON'][$j][$i]['y'] = $points_arr[$i][1];
+            }
+            $j++;
+        }
+
+        return $params;
+    }
+}