ShoppingList/phpInterface/shoppingList.php

<?php

	require_once("shoppingListConfig.php");
	
	class DBLink
	{
		static $sqlLink = null;

		public static function getDbLink()
		{
			if(DBLink::$sqlLink == null)
			{
				DBLink::$sqlLink = new mysqli(Configuration::$mysqlserver, Configuration::$mysqluser, Configuration::$mysqlpw, Configuration::$mysqldb, Configuration::$mysqlPort);

				// Verbindung überprüfen
				if (mysqli_connect_errno())
				{
				  printf("Database connection error:%s\n", mysqli_connect_error());
				  exit();
				}
			}
			
			return DBLink::$sqlLink;
		}
	}

	if(isset($_GET['command']) && $_GET['command'] == "printRhasspyProductList")
	{
		printRhasspyProductList();
		exit(0);
	}

	echo "<html>
			<head>
				<title>Shopping list</title>
				<style type=\"text/css\">
					table
					{
					  border-collapse:separate;
					  border-spacing:10px 10px;
					}

					.smallButton
					{
						font-size:10px;;
						height:5000em;
						width:5000em;
					}
				</style>
			</head>
			<body>";

	$command = $_POST['command'];

	if(isset($command))
	{
		switch($command)
		{
			case "addToList":
				$productId = $_POST['productToAdd'];
				addToList($productId);
				break;
			case "removeFromList":
				$productId = $_POST['productToRemove'];
				removeFromList($productId);
				break;
			case "printShoppingList":
				printShoppingList();
				break;
		}
	}
	
	printShoppingList();

	echo "</body></html>";

	mysqli_close(DBLink::getDbLink());


	function addToList($productId)
	{
		if($productId > 0)
		{
			$SQL_command;

			if(oneListExists())
				$SQL_command = "INSERT IGNORE INTO listEntries (listId, productId) VALUES ((SELECT id FROM `lists` ORDER BY creationTime DESC LIMIT 1), ".$productId.")";
			else
				$SQL_command = "INSERT IGNORE INTO listEntries (listId, productId) VALUES ((INSERT INTO `lists` (creationTime) VALUES (".round(microtime(true) * 1000).") RETURN  @id, ".$productId."))";

			if (DBLink::getDbLink()->query($SQL_command))
				echo "Product added to list.<br>";
			else
				echo "Product could not be added to list.<br>";
		}
		else
			echo "Select a product.";
	}


	function removeFromList($productId)
	{
		if($productId > 0)
		{
			if(oneListExists())
			{
				$SQL_command = "DELETE FROM listEntries WHERE listId=(SELECT id FROM `lists` ORDER BY creationTime DESC LIMIT 1) AND productId=".$productId;

				if (DBLink::getDbLink()->query($SQL_command))
					echo "Product removed from list.<br>";
				else
					echo "Product could not be removed from list.<br>";
			}
		}
		else
			echo "Select a product.";
	}


	function oneListExists()
	{
		$SQL_command = "SELECT COUNT(id) as listAmount FROM lists";
		$mysqli_result = DBLink::getDbLink()->query($SQL_command);
		if ($row = mysqli_fetch_object($mysqli_result))
		{
			if($row->listAmount > 0)
				return true;
		}

		return false;
	}


	function printShoppingList()
	{
		echo "	<form action=\"".$_SERVER['PHP_SELF']."\" method=\"POST\">
					<input type=\"hidden\" id=\"command\" name=\"command\" value=\"addToList\" />
					<select name=\"productToAdd\" id=\"productToAdd\">
						<option value=\"0\">Select product to add</option>
					";

					$SQL_command = "SELECT id, name FROM `products` ORDER BY name ASC";
					$mysqli_result = DBLink::getDbLink()->query($SQL_command);
					while ($row = mysqli_fetch_object($mysqli_result))
					{
						echo "<option value=\"".$row->id."\">".$row->name."</option>";
					}

		echo "		</select>
					<input type=\"submit\" value=\"add\" />
				</form>";

		if(oneListExists())
		{
			$SQL_command = "SELECT * FROM listEntries INNER JOIN products ON listEntries.productId=products.id INNER JOIN storeTypes ON products.storeTypeId = storeTypes.id WHERE listEntries.listId=(SELECT id FROM `lists` ORDER BY creationTime DESC LIMIT 1) ORDER BY storeTypes.name, products.name ASC";
				
			$mysqli_result = DBLink::getDbLink()->query($SQL_command);

			$lastShop="";

			while ($row = mysqli_fetch_array($mysqli_result))
			{
				if(isset($lastShop) && $lastShop != "" && $row[7] != $lastShop)
					echo "</table>";

				if(!isset($lastShop) || $row[7] != $lastShop)
				{
					$lastShop = $row[7];
					echo $lastShop."<br>================";
					echo "<table border=\"0\">";
				}

				echo "<tr>
						<td style=\"vertical-align:top;\">".$row[3]."</td>
						<td style=\"vertical-align:top;\">
							<form action=\"".$_SERVER['PHP_SELF']."\" method=\"POST\">
								<input type=\"hidden\" id=\"command\" name=\"command\" value=\"removeFromList\" />
								<input type=\"hidden\" id=\"productToRemove\" name=\"productToRemove\" value=\"".$row[1]."\" />
								<input class=\"smallButton\" type=\"submit\" value=\"remove\" />
							</form>
						</td>
					</tr>";
			}
			echo "</table>";
		}
		else
			echo "No list exists, yet.";
	}


	function printRhasspyProductList()
	{
		$SQL_Befehl = "SELECT name, synonyms FROM products ORDER BY products.name ASC";
		
		$mysqli_result = DBLink::getDbLink()->query($SQL_Befehl);

		$lastShop="";

		while ($row = mysqli_fetch_array($mysqli_result))
		{
			if(is_null($row[1]))
				echo $row[0]."\n";
			else
				echo "(".str_replace(";", "|", $row[1])."|".$row[0]."):".$row[0]."\n";
		}
	}

?>