<?php
/*
 * CSE 154 Autumn 18
 * Week 7 Section
 * menu.php web service to demonstrate basic GET parameters with arrays.
 *
 * Web service details:
 *   Required GET parameters: 
 *   - category
 *   Output Format:
 *   - txt 
 *   Output Details:
 *   - String representation items in given category.
 *     - Error message output if category not found or missing as GET parameter
 */

$drinks = array("coffee", "tea", "water");
$bakery = array("bagels", "toast", "waffles", "poptarts");

if (isset($_GET["category"])) {
  $category = $_GET["category"];
  if ($category === "drinks") {
    echo to_string($drinks);
  } else if ($category === "bakery") [
    echo to_string($bakery);
  } else {
    echo "We don't have {$category} on the menu!";
  }
} else {
  echo "Missing required 'category' GET parameter.";
}

/*
 * Returns a comma-separated bracketed string representation of $arr.
 * Requires $arr is a basic array.
 * @param $arr {array} - array to format
 * @returns {string} - formatted string representation of $arr.
 */
function to_string($arr) {
  $result = "[";
  for ($i = 0; $i < count($arr) - 1; $i++) {
    $result .= $arr[$i] . ", ";
  }
  if (count($arr) > 0) {
    $result .= $arr[count($arr) - 1];
  }
  return $result . "]";
}

?>