Create function to retrieve the enclosed area from a KML file

src/Service/KMLFileImporter.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace App\Service;
+
+use App\Entity\SupportedArea;
+
+use Symfony\Component\HttpFoundation\File\UploadedFile;
+
+use CrEOF\Spatial\PHP\Types\Geometry\Polygon;
+use CrEOF\Spatial\PHP\Types\Geometry\Point;
+use CrEOF\Spatial\PHP\Types\Geometry\LineString;
+
+class KMLFileImporter
+{
+    public function __construct()
+    {
+        $this->supported_area = new SupportedArea();
+    }
+
+    public function getMapData(UploadedFile $file)
+    {
+        $coordinate_array = array();
+        $point_array = array();
+        $reader = new XMLReader();
+        $reader->open($file);
+
+        while($reader->read())
+        {
+            if ($reader->nodeType == XMLReader::ELEMENT && $reader->name == "Placemark")
+            {
+                while($reader->read())
+                {
+                    if ($reader->nodeType == XMLReader::ELEMENT && $reader->name == "name")
+                    {
+                        $placemark_name = $reader->readInnerXML();
+                        echo $placemark_name."\n";
+                        $supported_area->setName($placemark_name);
+                        
+                    }
+                    if ($reader->nodeType == XMLReader::ELEMENT && $reader->name == "coordinates")
+                    {
+                        $coordinates = $reader->readInnerXML();
+                        // clean and parse the coordinates data from KML
+                        $coordinates = preg_replace('/\s\s+/', ',', $coordinates);
+                        $parsed_coordinates = explode(',', $coordinates);
+
+                        for ($x = 0; $x < sizeof($parsed_coordinates); $x++)
+                        {
+                            if (($x%3 != 0) && ($parsed_coordinates[$x] != ""))
+                            {
+                                $coordinate_array[] = $parsed_coordinates[$x];
+                            }
+                        }
+                        // create an array of Points for the Polygon constructor
+                        $i = 0;
+                        while($i < sizeof($coordinate_array))
+                        {
+                            $point_array[] = new Point($coordinate_array[$i], $coordinate_array[$++i]);
+                            $i++;
+                        }
+                        $area = new Polygon(array(new LineString($point_array)));
+                        $supported_area->setSupportedArea($area);
+                    }
+                }
+                break;
+            }   
+        }
+        $reader->close();
+    }
+}