Dragon-Knight/src/actions/explore.php

<?php

// explore.php :: Handles all map exploring, chances to fight, etc.

function move() {
	global $controlrow;

    // Early exit if fighting
    if (user()->currentaction == 'Fighting') redirect('/fight');

    // Validate direction
    $form = validate($_POST, ['direction' => ['in:north,west,east,south']]);
    if (!$form['valid']) return display(ul_from_validate_errors($form['errors']), 'Move Error');

    // Current game state
    $game_size = $controlrow['gamesize'];
    $latitude = user()->latitude;
    $longitude = user()->longitude;
    $direction = $form['data']['direction'];

    // Calculate new coordinates with boundary checks
    switch ($direction) {
        case 'north':
            $latitude = min($latitude + 1, $game_size);
            break;
        case 'south':
            $latitude = max($latitude - 1, -$game_size);
            break;
        case 'east':
            $longitude = min($longitude + 1, $game_size);
            break;
        case 'west':
            $longitude = max($longitude - 1, -$game_size);
            break;
    }

    // Check for town
    $town = get_town_by_xy($longitude, $latitude);
    if ($town !== false) {
        return Towns\travelto($town['id'], false);
    }

    // Determine action (1 in 5 chance of fighting)
	if (rand(1, 5) === 1) {
		user()->currentaction = 'Fighting';
		user()->currentfight = 1;
	} else {
		user()->currentaction = 'Exploring';
	}

	user()->latitude = $latitude;
	user()->longitude = $longitude;
	user()->save();

    redirect('/');
}