default_display_options = array( 'title', 'image', 'styles' ); $this->_cache_time = 86400; $this->data_source = "http://hubblesite.org/gallery/album/daily_image.php"; $this->data = false; $this->has_simplexml = class_exists('SimpleXMLElement'); $this->_valid_column_names = array('title', 'caption', 'date', 'image_url', 'gallery_url', 'credits'); $this->_valid_options = array( "image" => "Daily Image", "title" => "Image Title", "caption" => "Image Caption", "credits" => "Credits", "styles" => "HubbleSite Styles", ); wp_register_sidebar_widget("hubblesite-daily-image", "HubbleSite Daily Image", array($this, "render")); register_widget_control("hubblesite-daily-image", array($this, "render_ui")); } /** * Get the list of display options from the WordPress options database. */ function get_display_options() { $display_options = get_option('hubblesite-daily-image-options'); $this->display_options = array(); if (!empty($display_options)) { $this->display_options = array_intersect(explode(",", $display_options), array_keys($this->_valid_options)); } if (empty($this->display_options)) { $this->display_options = $this->default_display_options; } return $this->display_options; } /** * Render the widget. */ function render() { if (!empty($this->data) && is_array($this->data)) { $options = $this->get_display_options(); echo '
'; if (in_array("image", $options)) { echo ''; echo '' . $this->data['title'] . ''; echo ''; } if (in_array("title", $options)) { echo ''; echo $this->data['title']; echo ''; } if (in_array("caption", $options)) { echo '
'; echo $this->data['caption']; echo '
'; } if (in_array("credits", $options)) { echo '
'; echo $this->data['credits']; echo '
'; } echo '
'; if (in_array("styles", $options)) { echo ''; } } } function render_ui() { echo "

Show on Widget:

"; foreach ($this->_valid_options as $option => $label) { echo ""; } } /** * Parse a string of XML from the HubbleSite Daily Gallery Image feed. */ function parse_xml($xml_text) { if ($this->has_simplexml) { try { $xml = new SimpleXMLElement($xml_text); if ($xml !== false) { $data = array(); $is_valid = true; foreach ($this->_valid_column_names as $node) { if ($xml->{$node}) { $data[$node] = (string)$xml->{$node}; } else { $is_valid = false; break; } } if ($is_valid) { $this->data = $data; } else { $this->data = false; } } } catch (Exception $e) { $this->data = false; } } else { $parser = xml_parser_create(); $this->_character_data = ""; $this->_xml_data = array(); xml_set_element_handler( $parser, array($this, "_start_element_handler"), array($this, "_end_element_handler") ); xml_set_character_data_handler($parser, array($this, "_character_data_handler")); xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1); $this->data = false; if (xml_parse($parser, $xml_text)) { if (count($this->_xml_data) == count($this->_valid_column_names)) { $this->data = $this->_xml_data; } } } return $this->data; } function _start_element_handler($parser, $name, $attributes) { $this->_character_data = ""; } function _end_element_handler($parser, $name) { $name = strtolower($name); if (in_array($name, $this->_valid_column_names)) { $this->_xml_data[$name] = $this->_character_data; } $this->_character_data = ""; } function _character_data_handler($parser, $data) { $this->_character_data .= $data; } function _get_cached_data() { $result = get_option('hubblesite-daily-image-cache'); if (is_string($result)) { if (($data = @unserialize($result)) !== false) { list($timestamp, $cached_data) = $data; if (($timestamp + $this->_cache_time) > time()) { $is_valid = (count(array_intersect()) == count($this->_valid_column_names)); } } } return false; } } ?>