MAPG-2 Init project MapGuesser

* add composer.json and basic environment
 * add basic classes
 * add basic map with JS and CSS (with demo functionality)
 * add files for docker-compose
 * add launch.json for Docker debug
 * add README

src/Geo/Bounds.php

@@ -0,0 +1,76 @@
+<?php namespace MapGuesser\Geo;
+
+class Bounds
+{
+    private float $southLat;
+    private float $westLng;
+
+    private float $northLat;
+    private float $eastLng;
+
+    private bool $initialized = false;
+
+    public function __construct(Position $position = null)
+    {
+        if ($position === null) {
+            return;
+        }
+
+        $this->initialize($position);
+    }
+
+    public function extend(Position $position): void
+    {
+        if (!$this->initialized) {
+            $this->initialize($position);
+
+            return;
+        }
+
+        $lat = $position->getLat();
+        $lng = $position->getLng();
+
+        if ($lat < $this->southLat) {
+            $this->southLat = $lat;
+        }
+
+        if ($lng < $this->westLng) {
+            $this->westLng = $lng;
+        }
+
+        if ($lat > $this->northLat) {
+            $this->northLat = $lat;
+        }
+
+        if ($lng > $this->eastLng) {
+            $this->eastLng = $lng;
+        }
+    }
+
+    public function toJson(): string
+    {
+        if (!$this->initialized) {
+            throw new \Exception("Bounds are not initialized!");
+        }
+
+        return json_encode([
+            'south' => $this->southLat,
+            'west' => $this->westLng,
+            'north' => $this->northLat,
+            'east' => $this->eastLng,
+        ]);
+    }
+
+    private function initialize(Position $position)
+    {
+        $lat = $position->getLat();
+        $lng = $position->getLng();
+
+        $this->northLat = $lat;
+        $this->westLng = $lng;
+        $this->southLat = $lat;
+        $this->eastLng = $lng;
+
+        $this->initialized = true;
+    }
+}

src/Geo/Position.php

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+<?php namespace MapGuesser\Geo;
+
+class Position
+{
+    private float $lat;
+    private float $lng;
+
+    public function __construct(float $lat, float $lng)
+    {
+        $this->lat = $lat;
+        $this->lng = $lng;
+    }
+
+    public function getLat(): float
+    {
+        return $this->lat;
+    }
+
+    public function getLng(): float
+    {
+        return $this->lng;
+    }
+
+    public function toJson(): string
+    {
+        return json_encode([
+            'lat' => $this->lat,
+            'lng' => $this->lng,
+        ]);
+    }
+}