<?php

/**
 * See http://wpengineer.com/2426/wp_list_table-a-step-by-step-guide/
 * 
 */
if (! class_exists ( 'WP_List_Table' )) {
	require_once (ABSPATH . 'wp-admin/includes/class-wp-list-table.php');
}
class PostmanEmailLogView extends WP_List_Table {
	private $logger;
	
	/**
	 * ************************************************************************
	 * REQUIRED.
	 * Set up a constructor that references the parent constructor. We
	 * use the parent reference to set some default configs.
	 * *************************************************************************
	 */
	function __construct() {
		$this->logger = new PostmanLogger ( get_class ( $this ) );
		
		// Set parent defaults
		parent::__construct ( array (
				'singular' => 'email_log_entry', // singular name of the listed records
				'plural' => 'email_log_entries', // plural name of the listed records
				'ajax' => false 
		) ); // does this table support ajax?
	}
	
	/**
	 * ************************************************************************
	 * Recommended.
	 * This method is called when the parent class can't find a method
	 * specifically build for a given column. Generally, it's recommended to include
	 * one method for each column you want to render, keeping your package class
	 * neat and organized. For example, if the class needs to process a column
	 * named 'title', it would first see if a method named $this->column_title()
	 * exists - if it does, that method will be used. If it doesn't, this one will
	 * be used. Generally, you should try to use custom column methods as much as
	 * possible.
	 *
	 * Since we have defined a column_title() method later on, this method doesn't
	 * need to concern itself with any column with a name of 'title'. Instead, it
	 * needs to handle everything else.
	 *
	 * For more detailed insight into how columns are handled, take a look at
	 * WP_List_Table::single_row_columns()
	 *
	 * @param array $item
	 *        	A singular item (one full row's worth of data)
	 * @param array $column_name
	 *        	The name/slug of the column to be processed
	 * @return string Text or HTML to be placed inside the column <td>
	 *         ************************************************************************
	 */
	function column_default($item, $column_name) {
		switch ($column_name) {
			case 'date' :
			case 'status' :
				return $item [$column_name];
			default :
				return print_r ( $item, true ); // Show the whole array for troubleshooting purposes
		}
	}
	
	/**
	 * ************************************************************************
	 * Recommended.
	 * This is a custom column method and is responsible for what
	 * is rendered in any column with a name/slug of 'title'. Every time the class
	 * needs to render a column, it first looks for a method named
	 * column_{$column_title} - if it exists, that method is run. If it doesn't
	 * exist, column_default() is called instead.
	 *
	 * This example also illustrates how to implement rollover actions. Actions
	 * should be an associative array formatted as 'slug'=>'link html' - and you
	 * will need to generate the URLs yourself. You could even ensure the links
	 *
	 *
	 * @see WP_List_Table::::single_row_columns()
	 * @param array $item
	 *        	A singular item (one full row's worth of data)
	 * @return string Text to be placed inside the column <td> (movie title only)
	 *         ************************************************************************
	 */
	function column_title($item) {
		
		// Build row actions
		$iframeUri = 'admin-post.php?page=postman_email_log&action=%s&email=%s&TB_iframe=true&width=700&height=550';
		$deleteUrl = wp_nonce_url ( admin_url ( sprintf ( 'admin-post.php?page=postman_email_log&action=%s&email=%s', 'delete', $item ['ID'] ) ), 'delete_email_log_item_' . $item ['ID'] );
		$viewUrl = admin_url ( sprintf ( $iframeUri, 'view', $item ['ID'] ) );
		$transcriptUrl = admin_url ( sprintf ( $iframeUri, 'transcript', $item ['ID'] ) );
		$resendUrl = admin_url ( sprintf ( $iframeUri, 'resend', $item ['ID'] ) );
		
		$meta_values = get_post_meta ( $item ['ID'] );
		
		$actions = array (
				'delete' => sprintf ( '<a href="%s">%s</a>', $deleteUrl, _x ( 'Delete', 'Delete an item from the email log', Postman::TEXT_DOMAIN ) ),
				'view' => sprintf ( '<a href="%s" class="thickbox">%s</a>', $viewUrl, _x ( 'View', 'View an item from the email log', Postman::TEXT_DOMAIN ) ) 
		);
		
		if (! empty ( $meta_values ['session_transcript'] [0] )) {
			$actions ['transcript'] = sprintf ( '<a href="%1$s" class="thickbox">%2$s</a>', $transcriptUrl, __ ( 'Session Transcript', Postman::TEXT_DOMAIN ) );
		} else {
			$actions ['transcript'] = sprintf ( '%2$s', $transcriptUrl, __ ( 'Session Transcript', Postman::TEXT_DOMAIN ) );
		}
		if (! (empty ( $meta_values ['original_to'] [0] ) && empty ( $meta_values ['originalHeaders'] [0] ))) {
			// $actions ['resend'] = sprintf ( '<a href="%s">%s</a>', $resendUrl, __ ( 'Resend', Postman::TEXT_DOMAIN ) );
			$actions ['resend'] = sprintf ( '<span id="%3$s"><a href="javascript:postman_resend_email(%1$s);">%2$s</a></span>', $item ['ID'], __ ( 'Resend', Postman::TEXT_DOMAIN ), 'resend-' . $item ['ID'] );
		} else {
			$actions ['resend'] = sprintf ( '%2$s', $resendUrl, __ ( 'Resend', Postman::TEXT_DOMAIN ) );
		}
		
		// Return the title contents
		return sprintf ( '%1$s %3$s',
            /*$1%s*/ $item ['title'],
            /*$2%s*/ $item ['ID'],
            /*$3%s*/ $this->row_actions ( $actions ) );
	}
	
	/**
	 * ************************************************************************
	 * REQUIRED if displaying checkboxes or using bulk actions! The 'cb' column
	 * is given special treatment when columns are processed.
	 * It ALWAYS needs to
	 * have it's own method.
	 *
	 * @see WP_List_Table::::single_row_columns()
	 * @param array $item
	 *        	A singular item (one full row's worth of data)
	 * @return string Text to be placed inside the column <td> (movie title only)
	 *         ************************************************************************
	 */
	function column_cb($item) {
		return sprintf ( '<input type="checkbox" name="%1$s[]" value="%2$s" />',
            /*$1%s*/ $this->_args ['singular'], // Let's simply repurpose the table's singular label ("movie")
		/* $2%s */
		$item ['ID'] ); // The value of the checkbox should be the record's id
	}
	
	/**
	 * ************************************************************************
	 * REQUIRED! This method dictates the table's columns and titles.
	 * This should
	 * return an array where the key is the column slug (and class) and the value
	 * is the column's title text. If you need a checkbox for bulk actions, refer
	 * to the $columns array below.
	 *
	 * The 'cb' column is treated differently than the rest. If including a checkbox
	 * column in your table you must create a column_cb() method. If you don't need
	 * bulk actions or checkboxes, simply leave the 'cb' entry out of your array.
	 *
	 * @see WP_List_Table::::single_row_columns()
	 * @return array An associative array containing column information: 'slugs'=>'Visible Titles'
	 *         ************************************************************************
	 */
	function get_columns() {
		$columns = array (
				'cb' => '<input type="checkbox" />', // Render a checkbox instead of text
				'title' => _x ( 'Subject', 'What is the subject of this message?', Postman::TEXT_DOMAIN ),
				'status' => __ ( 'Status', Postman::TEXT_DOMAIN ),
				'date' => _x ( 'Delivery Time', 'When was this email sent?', Postman::TEXT_DOMAIN ) 
		);
		return $columns;
	}
	
	/**
	 * ************************************************************************
	 * Optional.
	 * If you want one or more columns to be sortable (ASC/DESC toggle),
	 * you will need to register it here. This should return an array where the
	 * key is the column that needs to be sortable, and the value is db column to
	 * sort by. Often, the key and value will be the same, but this is not always
	 * the case (as the value is a column name from the database, not the list table).
	 *
	 * This method merely defines which columns should be sortable and makes them
	 * clickable - it does not handle the actual sorting. You still need to detect
	 * the ORDERBY and ORDER querystring variables within prepare_items() and sort
	 * your data accordingly (usually by modifying your query).
	 *
	 * @return array An associative array containing all the columns that should be sortable: 'slugs'=>array('data_values',bool)
	 *         ************************************************************************
	 */
	function get_sortable_columns() {
		return array ();
		$sortable_columns = array (
				'title' => array (
						'title',
						false 
				), // true means it's already sorted
				'status' => array (
						'status',
						false 
				),
				'date' => array (
						'date',
						false 
				) 
		);
		return $sortable_columns;
	}
	
	/**
	 * ************************************************************************
	 * Optional.
	 * If you need to include bulk actions in your list table, this is
	 * the place to define them. Bulk actions are an associative array in the format
	 * 'slug'=>'Visible Title'
	 *
	 * If this method returns an empty value, no bulk action will be rendered. If
	 * you specify any bulk actions, the bulk actions box will be rendered with
	 * the table automatically on display().
	 *
	 * Also note that list tables are not automatically wrapped in <form> elements,
	 * so you will need to create those manually in order for bulk actions to function.
	 *
	 * @return array An associative array containing all the bulk actions: 'slugs'=>'Visible Titles'
	 *         ************************************************************************
	 */
	function get_bulk_actions() {
		$actions = array (
				'bulk_delete' => _x ( 'Delete', 'Delete an item from the email log', Postman::TEXT_DOMAIN ) 
		);
		return $actions;
	}
	
	/**
	 * ************************************************************************
	 * Optional.
	 * You can handle your bulk actions anywhere or anyhow you prefer.
	 * For this example package, we will handle it in the class to keep things
	 * clean and organized.
	 *
	 * @see $this->prepare_items() ************************************************************************
	 */
	function process_bulk_action() {
	}
	
	/**
	 * ************************************************************************
	 * REQUIRED! This is where you prepare your data for display.
	 * This method will
	 * usually be used to query the database, sort and filter the data, and generally
	 * get it ready to be displayed. At a minimum, we should set $this->items and
	 * $this->set_pagination_args(), although the following properties and methods
	 * are frequently interacted with here...
	 *
	 * @global WPDB $wpdb
	 * @uses $this->_column_headers
	 * @uses $this->items
	 * @uses $this->get_columns()
	 * @uses $this->get_sortable_columns()
	 * @uses $this->get_pagenum()
	 * @uses $this->set_pagination_args()
	 *       ************************************************************************
	 */
	function prepare_items() {
		
		/**
		 * First, lets decide how many records per page to show
		 */
		$per_page = 10;
		
		/**
		 * REQUIRED.
		 * Now we need to define our column headers. This includes a complete
		 * array of columns to be displayed (slugs & titles), a list of columns
		 * to keep hidden, and a list of columns that are sortable. Each of these
		 * can be defined in another method (as we've done here) before being
		 * used to build the value for our _column_headers property.
		 */
		$columns = $this->get_columns ();
		$hidden = array ();
		$sortable = $this->get_sortable_columns ();
		
		/**
		 * REQUIRED.
		 * Finally, we build an array to be used by the class for column
		 * headers. The $this->_column_headers property takes an array which contains
		 * 3 other arrays. One for all columns, one for hidden columns, and one
		 * for sortable columns.
		 */
		$this->_column_headers = array (
				$columns,
				$hidden,
				$sortable 
		);
		
		/**
		 * Optional.
		 * You can handle your bulk actions however you see fit. In this
		 * case, we'll handle them within our package just to keep things clean.
		 */
		$this->process_bulk_action ();
		
		/**
		 * Instead of querying a database, we're going to fetch the example data
		 * property we created for use in this plugin.
		 * This makes this example
		 * package slightly different than one you might build on your own. In
		 * this example, we'll be using array manipulation to sort and paginate
		 * our data. In a real-world implementation, you will probably want to
		 * use sort and pagination data to build a custom query instead, as you'll
		 * be able to use your precisely-queried data immediately.
		 */
		$data = array ();
		$args = array (
				'posts_per_page' => 1000,
				'offset' => 0,
				'category' => '',
				'category_name' => '',
				'orderby' => 'date',
				'order' => 'DESC',
				'include' => '',
				'exclude' => '',
				'meta_key' => '',
				'meta_value' => '',
				'post_type' => PostmanEmailLogPostType::POSTMAN_CUSTOM_POST_TYPE_SLUG,
				'post_mime_type' => '',
				'post_parent' => '',
				'post_status' => 'private',
				'suppress_filters' => true 
		);
		$posts = get_posts ( $args );
		foreach ( $posts as $post ) {
			$date = $post->post_date;
			$humanTime = human_time_diff ( strtotime ( $post->post_date_gmt ) );
			// if this PHP system support humanTime, than use it
			if (! empty ( $humanTime )) {
				/* Translators: where %s indicates the relative time from now */
				$date = sprintf ( _x ( '%s ago', 'A relative time as in "five days ago"', Postman::TEXT_DOMAIN ), $humanTime );
			}
			$flattenedPost = array (
					// the post title must be escaped as they are displayed in the HTML output
					'title' => esc_html ( $post->post_title ),
					// the post status must be escaped as they are displayed in the HTML output
					'status' => ($post->post_excerpt != null ? esc_html ( $post->post_excerpt ) : __ ( 'Sent', Postman::TEXT_DOMAIN )),
					'date' => $date,
					'ID' => $post->ID 
			);
			array_push ( $data, $flattenedPost );
		}
		
		/**
		 * This checks for sorting input and sorts the data in our array accordingly.
		 *
		 * In a real-world situation involving a database, you would probably want
		 * to handle sorting by passing the 'orderby' and 'order' values directly
		 * to a custom query. The returned data will be pre-sorted, and this array
		 * sorting technique would be unnecessary.
		 */
		function usort_reorder($a, $b) {
			$orderby = (! empty ( $_REQUEST ['orderby'] )) ? $_REQUEST ['orderby'] : 'title'; // If no sort, default to title
			$order = (! empty ( $_REQUEST ['order'] )) ? $_REQUEST ['order'] : 'asc'; // If no order, default to asc
			$result = strcmp ( $a [$orderby], $b [$orderby] ); // Determine sort order
			return ($order === 'asc') ? $result : - $result; // Send final sort direction to usort
		}
		// usort($data, 'usort_reorder');
		
		/**
		 * *********************************************************************
		 * ---------------------------------------------------------------------
		 * vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
		 *
		 * In a real-world situation, this is where you would place your query.
		 *
		 * For information on making queries in WordPress, see this Codex entry:
		 * http://codex.wordpress.org/Class_Reference/wpdb
		 *
		 * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
		 * ---------------------------------------------------------------------
		 * ********************************************************************
		 */
		
		/**
		 * REQUIRED for pagination.
		 * Let's figure out what page the user is currently
		 * looking at. We'll need this later, so you should always include it in
		 * your own package classes.
		 */
		$current_page = $this->get_pagenum ();
		
		/**
		 * REQUIRED for pagination.
		 * Let's check how many items are in our data array.
		 * In real-world use, this would be the total number of items in your database,
		 * without filtering. We'll need this later, so you should always include it
		 * in your own package classes.
		 */
		$total_items = count ( $data );
		
		/**
		 * The WP_List_Table class does not handle pagination for us, so we need
		 * to ensure that the data is trimmed to only the current page.
		 * We can use
		 * array_slice() to
		 */
		$data = array_slice ( $data, (($current_page - 1) * $per_page), $per_page );
		
		/**
		 * REQUIRED.
		 * Now we can add our *sorted* data to the items property, where
		 * it can be used by the rest of the class.
		 */
		$this->items = $data;
		
		/**
		 * REQUIRED.
		 * We also have to register our pagination options & calculations.
		 */
		$this->set_pagination_args ( array (
				'total_items' => $total_items, // WE have to calculate the total number of items
				'per_page' => $per_page, // WE have to determine how many items to show on a page
				'total_pages' => ceil ( $total_items / $per_page ) 
		) ); // WE have to calculate the total number of pages
	}
}