<?php

// config.php loads the Amazon API key and other configuration details
// (you'll be asked for these when you clone this app)
require_once 'config/config.php';

// our Amazon API module
require_once 'XNC/Services/Amazon.php';

// introductory HTML welcome
require_once 'welcome.php';

// remove non-safe characters from the submitted query
// or use a default query if there isn't one

$query = $_GET['q'] ? xnhtmlentities($_GET['q']) : 'fish';

// print the form
?>

<form action="index.php" METHOD="GET">
    <label for="q">Search term</label>
    <input name="q" value="<?php echo $query ?>"/>
    <input type="submit" value="Search Amazon Books"/>
</form>

<?php

// log into Amazon, using our config key

$amazon = new XNC_Services_Amazon(PrivateConfig::$amazonKey);

// execute a tag search

$response = $amazon->itemSearch(array('SearchIndex' => 'Books',
    'Keywords' => $query, 'ResponseGroup' => 'Medium'));

// how'd we do?

echo "<h3>Showing {$response->totalResultsReturned}";
echo " of {$response->totalResultsAvailable} results.</h3>";


// finally, print the results in a table

?>

<table width="99%">
    <thead>
        <tr>
            <th>Image</th>
            <th>Title</th>
            <th>Author</th>
            <th>Sales Rank</th>
        </tr>
    </thead>
    <tbody>
<?php

// loop through all the objects returned by the query

foreach ($response->Result as $result)
{
    // transform any non-safe characters in the book title
    $safetitle = xnhtmlentities($result->Title);
    
    // 'Author' could be single string or array
    $author = is_array($result->Author)
        ? implode(', ', flatten($result->Author))
        : $result->Author;
    
    // print the table row with the object details
    echo <<<_HTML_
        <tr>
            <td><a href="{$result->DetailPageURL}"><img
                src="{$result->SmallImage->Url}"/></a></td>
            <td><a href="{$result->DetailPageURL}">{$safetitle}</a></td>
            <td>{$author}</td>
            <td>{$result->SalesRank}</td>
        </tr>
_HTML_;
}

// and we're done!

?>
    </tbody>
</table>

<?php

// Amazon sends the book author data as nested elements which
// become nested arrays, which need to be flattened for display

function flatten($array)
{
   $tmp = array();
   foreach($array as $key => $value)
   {
       if(is_array($value))
           $tmp = array_merge($tmp,flatten($value,$key));
       else
           $tmp[$key] = $value;
   }
   return $tmp;
}

?>