<?php
//Add function file
if (file_exists('../includes/functions.php')) {
  require_once('../includes/functions.php');
} else {
  echo "Unsupported File";
}

$from_value = '';
$from_unit = '';
$to_unit = '';
$to_value = '';

if ($_POST['submit']) {
  $from_value = $_POST['from_value'];
  $from_unit = $_POST['from_unit'];
  $to_unit = $_POST['to_unit'];

  $to_value = convert_volume($from_value, $from_unit, $to_unit);
}
$volume_options = array(
  'cubic inches',
  'cubic feet',
  'Imperial gallons',
  'Imperial quarts',
  'Imperial pints',
  'Imperial cups',
  'Imperial ounces',
  'Imperial tablespoons',
  'Imperial teaspoons',
  'US gallons',
  'US quarts',
  'US pints',
  'US cups',
  'US ounces',
  'US tablespoons',
  'US teaspoons',
  'cubic centimeters',
  'cubic meters',
  'liters',
  'milliliters'
);
?>
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <link rel="stylesheet" href="../css/simp-Volume.css" />
  <title>Convert Volume</title>
  <script>
    //Alert message once script- By JavaScript Kit
    //Credit notice must stay intact for use
    //Visit http://javascriptkit.com for this script

    //specify message to alert
    var alertmessage = "Click Side button to calculate measurements in batch"

    ///No editing required beyond here/////

    //Alert only once per browser session (0=no, 1=yes)
    var once_per_session = 1


    function get_cookie(Name) {
      var search = Name + "="
      var returnvalue = "";
      if (document.cookie.length > 0) {
        offset = document.cookie.indexOf(search)
        if (offset != -1) { // if cookie exists
          offset += search.length
          // set index of beginning of value
          end = document.cookie.indexOf(";", offset);
          // set index of end of cookie value
          if (end == -1)
            end = document.cookie.length;
          returnvalue = unescape(document.cookie.substring(offset, end))
        }
      }
      return returnvalue;
    }

    function alertornot() {
      if (get_cookie('alerted') == '') {
        loadalert()
        document.cookie = "alerted=yes"
      }
    }

    function loadalert() {
      alert(alertmessage)
    }

    if (once_per_session == 0)
      loadalert()
    else
      alertornot()
  </script>
</head>

<body>
  <!--This is the simpler version,
    supposed to have-
        >a top title
        >a side bar menu
        >calculator with input,output,reset button-->
  <nav class="navbar">
    <span class="open-slide">
      <a href="#" onclick="openSlideMenu()">
        <svg width="30" height="30">
          <path d="M0,5 30,5" stroke="#000" stroke-width="5" />
          <path d="M0,14 30,14" stroke="#000" stroke-width="5" />
          <path d="M0,23 30,23" stroke="#000" stroke-width="5" />
        </svg>
      </a>
    </span>
  </nav>
  <div id="side-menu" class="side-nav">
    <a href="#" class="btn-close" onclick="closeSlideMenu()">&times;</a>
    <a href="#">About Us</a>
    <a href=" length.php">Length</a>
    <a href=" temperature.php">Temperature</a>
    <a href=" area.php">Area</a>
    <a href=" volume.php">Volume</a>
    <a href=" weight.php">Weight</a>

    <a href=" speed.php">Speed</a>
    <a href="../login/index.html">Log in</a>
    <a href="../login/index.html">Sign up</a>

  </div>

  <script src="../js/frontSide.js"></script>
  <div id="title">
    <h1>Volume</h1>
  </div>
  <!-- top---->
  <div class="calculator">
    <!--whole calculator outline-->
    <div class="calcb">
      <!--Calculator box -->
      <div id="sinput" class="input">
        <form action="" method="post">

          <div class="entry">
            <input id="Input" class="Input-text" placeholder="Enter amount" name="from_value" value="<?php echo $from_value; ?>" />&nbsp;
            <label for="Input" class="Input-label">Your entry</label>
            <select name="from_unit">
              <?php
              foreach ($volume_options as $unit) {
                $opt = optionize($unit);
                echo "<option value=\"{$opt}\"";
                if ($from_unit == $opt) {
                  echo " selected";
                }
                echo ">{$unit}</option>";
              }
              ?>
            </select>
          </div>

          <div class="entry">
            <input id="Input" class="Input-text" placeholder="Wait for it" name="to_value" value=" <?php echo $to_value; ?>" />&nbsp;
            <label for="Input" class="input-label">Converted Result</label>
            <select name="to_unit">
              <?php
              foreach ($volume_options as $unit) {
                $opt = optionize($unit);
                echo "<option value=\"{$opt}\"";
                if ($from_unit == $opt) {
                  echo " selected";
                }
                echo ">{$unit}</option>";
              }
              ?>
            </select>

          </div>

          <input type="submit" name="submit" value="Submit" />
        </form>

      </div>
    </div>

  </div>
  </div>
</body>

</html>