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<?php /* Plugin Name: APOD Widget Description: Adds a sidebar widget to display the Astronomy Picture of the Day (APOD) Author: Paul Lamb Version: 1.3 Author URI: http://www.digitalmeandering.com/ Notes: The framework for this widget was politely borrowed, with no intent to give back, from the Google Search widget */ function widget_apodwidget_init() { // Check for the required plugin functions. This will prevent fatal // errors occurring when you deactivate the dynamic-sidebar plugin. if ( !function_exists('register_sidebar_widget') ) return; function widget_apodwidget_returnimageandlink() { $apodAvailable = true; $SecondsConstant = 60; $MinutesConstant = 60; $options = get_option('widget_apodwidget'); // Grab our date-time stamps // Added option to offset timestamp //$TodayDt = date(ymd); //$MonthDay = date(ym); $houroffset = htmlspecialchars($options['houroffset'], ENT_QUOTES); $Time = time() + ($houroffset * $MinutesConstant * $SecondsConstant); $TodayDt = date(ymd, $Time); $MonthDay = date(ym); // Set the image width to 150 pixels $ImageWidthConst = 150; // Set the base URL for the APOD site, thanks NASA! $URL = 'http://antwrp.gsfc.nasa.gov/apod/'; // Create our HTML file name, following this format: // 'ap060925.html' where today's date is 09/25/2006 $Filename = 'ap'.$TodayDt.'.html'; // Append the file to the URL to create the full URL to today's APOD $FullURL = $URL.$Filename; // Create the regular expressions for both the regular and large image, even though at the moment I'm not even using the large image $RegExStringSmall = 'SRC="image/'.$MonthDay.'/(.*)"'; $RegExStringBig = 'href="image/'.$MonthDay.'/(.*)"'; // Regular expression to validate that we have a good image to present $RegExImageExtension= '.*(\.[Jj][Pp][Gg]|\.[Gg][Ii][Ff]|\.[Jj][Pp][Ee][Gg]|\.[Pp][Nn][Gg])'; // Open the remote file using the full URL, read-only if($RemoteFile = @fopen($FullURL, "r")) { if ($RemoteFile) { // Loop until we're at the end of the file while (!feof($RemoteFile)) { $buffer = fgets($RemoteFile, 1024); // Check for the large image if (eregi ($RegExStringBig, $buffer, $out)) $ImageSrcBig = $out[1]; // Check for the regular image if (eregi ($RegExStringSmall, $buffer, $out)) { $ImageSrcSmall = $out[1]; // We're found it, time to take a break break; } } // All done, we're closed, get out! fclose($RemoteFile); } } // We didn't find the APOD page, set available bool to false else { $apodAvailable = false; } // If the APOD is available, perform our mojo if ($apodAvailable) { // Create the full image URL based on what the regular expression found $ImageUrlSmall = $URL.'image/'.$MonthDay.'/'.$ImageSrcSmall; // Create the full big image URL based on what the regular expression found $ImageUrlBig = $URL.'image/'.$MonthDay.'/'.$ImageSrcBig; // Check to make sure the image is a compatible format if(eregi($RegExImageExtension, $ImageUrlSmall)) { // Get the dimensions of the image for resizing $ImageDimensionsSmall = @getimagesize($ImageUrlSmall); // We want a proportional image, so create our resize percentage based on the width $ImageResizePercentage = ($ImageDimensionsSmall[0] / $ImageWidthConst); // Set the image width to our constant $ImageWidthSmall = ($ImageWidthConst); // Set the image height using the resize percentage, again porpotions are the key $ImageHeightSmall = @($ImageDimensionsSmall[1] / $ImageResizePercentage); // Create the hyperlink to the APOD site, wrapped around the image itself, setting the target to a new window and passing in the image height and width $ImageAndLink = ''; // El fin! Return the results return $ImageAndLink; } else { $apodAvailable = false; } } // The APOD wasn't available, return a message indicating as such if (!$apodAvailable) { return '

APOD not available

'; } } function widget_apodwidget($args) { extract($args); // Each widget can store its own options. We keep strings here. $options = get_option('widget_apodwidget'); $title = $options['title']; echo $before_widget; echo $before_title . $title . $after_title; $ApodImageAndLink = widget_apodwidget_returnimageandlink(); echo ''; echo $after_widget; } // This function creates the widget control, using the built in widget abilities for controling widgets (they only get the change the title, it's no big deal) function widget_apodwidget_control() { // Get our options and see if we're handling a form submission. $options = get_option('widget_apodwidget'); if ( !is_array($options) ) $options = array('title'=>'APOD', 'houroffset' => '0'); if ( $_POST['apodwidget-submit'] ) { // Remember to sanitize and format use input appropriately. $options['title'] = strip_tags(stripslashes($_POST['apodwidget-title'])); $options['houroffset'] = strip_tags(stripslashes($_POST['apodwidget-houroffset'])); update_option('widget_apodwidget', $options); } // Be sure you format your options to be valid HTML attributes. $title = htmlspecialchars($options['title'], ENT_QUOTES); $houroffset = htmlspecialchars($options['houroffset'], ENT_QUOTES); $timestamp = time() + ($houroffset * 60 * 60); // Time + offset * minutes * seconds // Here is our little form segment. Notice that we don't need a // complete form. This will be embedded into the existing form. echo '

Title:

'; echo '

Hour Offset:

'; echo '

New Timestamp:

'; echo '

Changes wont be reflected until after saving

'; echo ''; } // This registers our optional widget control form. Because of this // our widget will have a button that reveals a 200x100 pixel form. register_widget_control(array('APOD', 'widgets'), 'widget_apodwidget_control', 200, 200); // This registers our widget so it appears with the other available // widgets and can be dragged and dropped into any active sidebars. register_sidebar_widget(array('APOD', 'widgets'), 'widget_apodwidget'); } // Run our code later in case this loads prior to any required plugins. add_action('widgets_init', 'widget_apodwidget_init'); ?>