MAPG-111 store map area in table 'maps'

database/migrations/data/20200612_2124_map_area.php

@@ -0,0 +1,24 @@
+<?php
+
+use MapGuesser\Database\Query\Modify;
+use MapGuesser\Database\Query\Select;
+use MapGuesser\Interfaces\Database\IResultSet;
+use MapGuesser\Util\Geo\Bounds;
+
+$select = new Select(\Container::$dbConnection, 'maps');
+$select->columns(['id', 'bound_south_lat', 'bound_west_lng', 'bound_north_lat', 'bound_east_lng']);
+
+$result = $select->execute();
+
+\Container::$dbConnection->startTransaction();
+
+while ($map = $result->fetch(IResultSet::FETCH_ASSOC)) {
+    $bounds = Bounds::createDirectly($map['bound_south_lat'], $map['bound_west_lng'], $map['bound_north_lat'], $map['bound_east_lng']);
+
+    $modify = new Modify(\Container::$dbConnection, 'maps');
+    $modify->setId($map['id']);
+    $modify->set('area', $bounds->calculateApproximateArea());
+    $modify->save();
+}
+
+\Container::$dbConnection->commit();

database/migrations/structure/20200612_2124_map_area.sql

@@ -0,0 +1,4 @@
+ALTER TABLE
+  `maps`
+ADD
+  `area` decimal(13, 4) NOT NULL DEFAULT 0.0;