options = get_option( 'Amazon Reloaded for WordPress Options' ) ) ) {
$this->options = array( 'tld' => 'com', 'id' => '' );
}
}
/// Hook Functions
/**
* Hook for activate action.
*
* Adds the plugin's option to the database.
*/
function on_activate( ) {
if( false === get_option( 'Amazon Reloaded for WordPress Options' ) ) {
add_option( 'Amazon Relaoded for WordPress Options', $this->options );
}
}
/**
* Hook for deactivate action.
*
* Removes the plugin's option from the database.
*/
function on_deactivate( ) {
if( false !== get_option( 'Amazon Reloaded for WordPress Options' ) ) {
delete_option( 'Amazon Reloaded for WordPress Options' );
}
}
/**
* Hook for the admin_menu action.
*
* Enqueues proper javascript files for operation of the plugin. Also adds the appropriate options page
* that lets the user manage their Amazon associate id and country.
*/
function on_admin_menu( ) {
// If we're on the write post or write page interface, add the Amazon Reloaded javascript
if( $this->is_write_page( ) ) {
wp_enqueue_script( 'amazon-reloaded', get_bloginfo( 'wpurl' ) . '/wp-content/plugins/amazon-reloaded-for-wordpress/js/amazon-reloaded.js', array( 'jquery' ) );
}
// Add the plugin option page
add_options_page( 'Amazon Reloaded', 'Amazon Reloaded', 8, basename( __FILE__ ), array( &$this, 'options_page' ) );
// Add the meta box to the post and page interfaces. It is assigned a type of normal so it appears below the categories
add_meta_box( 'Amazon Reloaded', 'Amazon Reloaded', array( &$this, 'meta_box_output' ), 'post', 'normal' );
add_meta_box( 'Amazon Reloaded', 'Amazon Reloaded', array( &$this, 'meta_box_output' ), 'page', 'normal' );
}
/**
* Hook for the admin_head action.
*
* Outputs an appropriate link to the Amazon Reloaded for WordPress CSS sheet.
*/
function on_admin_head( ) {
if( $this->is_write_page( ) ) {
echo '';
}
}
/**
* Hook for wp_ajax_amazon_reloaded_for_wordpress action.
*
* Request results from Amazon.com's web services and prints them to output.
*/
function on_wp_ajax_amazon_reloaded_for_wordpress( ) {
$request_url = $this->get_web_service_request_url( );
// We do a manual one-step redirect here
if( function_exists( 'curl_init' ) ) {
// Start the cURL session
$session = curl_init( $request_url );
// Set some cURL options
curl_setopt( $session, CURLOPT_HEADER, true );
curl_setopt( $session, CURLOPT_RETURNTRANSFER, true );
curl_setopt( $session, CURLOPT_FOLLOWLOCATION, false );
// Execute the cURL request
$redirect_response = curl_exec( $session );
// Grab the location URL from the initial response
preg_match( "/Location: (.*)/si", $redirect_response, $matches );
// Closes the initial session
curl_close( $session );
// Start the cURL session that will grab the actual results
$redirected_session = curl_init( $matches[ 1 ] );
// Set some cURL options
curl_setopt( $redirected_session, CURLOPT_HEADER, false );
curl_setopt( $redirected_session, CURLOPT_RETURNTRANSFER, true );
curl_setopt( $redirected_session, CURLOPT_FOLLOWLOCATION, false );
// Execute the cURL request
$response = curl_exec( $redirected_session );
// Close the cURL connection
curl_close( $redirected_session );
} else if( ini_get( 'allow_url_fopen' ) ) {
$response = file_get_contents( $request_url );
} else {
// Echo an error message
echo "
Your server does not have the cURL extension or allow remote opening of files. WP-Amazon Reloaded will not function.
";
exit( );
}
echo $response;
exit( );
}
/// Utility Functions
/**
* Returns a boolean value indicating whether the currently requested page is a
* part of the write page or write post interface.
*
* @return boolean true if the currently requested page is a write interface for posts or pages.
*/
function is_write_page( ) {
return strpos( $_SERVER[ 'REQUEST_URI' ], 'post-new.php' ) || strpos( $_SERVER[ 'REQUEST_URI' ], 'page-new.php' ) || strpos( $_SERVER[ 'REQUEST_URI' ], 'post.php' ) || strpos( $_SERVER[ 'REQUEST_URI' ], 'page.php' );
}
/**
* Returns the appropriate url for a web service request based on POST parameters.
*
* @return string the appropriate url to use in a web service request.
*/
function get_web_service_request_url( ) {
$xslt_document_location = path_join( get_bloginfo( 'wpurl' ), 'wp-content/plugins/amazon-reloaded-for-wordpress/resources/amazon-reloaded.xslt' );
$request = "http://ecs.amazonaws.";
$request .= $this->options[ 'tld' ];
$request .= "/onca/xml?Service=AWSECommerceService";
$request .= "&AWSAccessKeyId=" . urlencode( AMAZON_KEY_ID );
$request .= "&AssociateTag=" . urlencode( $this->options[ 'id' ] );
$request .= "&Version=2008-04-07";
$request .= "&Operation=ItemSearch";
$request .= "&SearchIndex=Blended";
$request .= "&ContentType=text/html";
$request .= "&Style=" . urlencode( $xslt_document_location );
$request .= "&ResponseGroup=Images,ItemAttributes";
$request .= "&Keywords=" . urlencode( $_POST[ 'keywords' ] );
return $request;
}
/**
* Provides the output for the plugin's meta box.
*/
function meta_box_output( ) {
require_once ( path_join( dirname( __FILE__ ), 'pages/meta_box.php' ) );
}
/**
* Provides the output for the plugin's option page.
*/
function options_page( ) {
require_once ( path_join( dirname( __FILE__ ), 'pages/options.php' ) );
}
/**
* Provides an easy mechanism to save the options value to the WordPress database
* for persistence.
*
* @return boolean true if the save was successful.
*/
function save_options( ) {
return update_option( 'Amazon Reloaded for WordPress Options', $this->options );
}
/**
* Setter method for the Amazon associate id option.
*
* @param string $id the id to be set.
*/
function set_id( $id ) {
$this->options[ 'id' ] = $id;
}
/**
* Setter method for the tld option used to form the correct web services URL.
*
* @param string $tld the tld to be set.
*/
function set_tld( $tld ) {
$this->options[ 'tld' ] = $tld;
}
}
}
if( class_exists( 'Amazon_Reloaded_For_WordPress' ) ) {
$amazon_reloaded = new Amazon_Reloaded_For_WordPress( );
}
?>