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<?php |
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|
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/** |
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* This class is responsible for generating a HTML table from a list of supplied attributes. |
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* |
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* @package Posts_Data_Table |
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* @author Barn2 Media <info@barn2.co.uk> |
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* @license GPL-3.0 |
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* @link https://barn2.co.uk |
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* @copyright 2016-2017 Barn2 Media Ltd |
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*/ |
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// Prevent direct file access |
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if ( !defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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class Posts_Data_Table_Simple { |
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|
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/** |
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* The complete list of table attributes, and their defaults. |
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*/ |
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public static $default_args = array( |
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'columns' => 'title,content,date,author,category', |
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'rows_per_page' => 20, |
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'sort_by' => 'date', |
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'sort_order' => '', |
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'category' => '', |
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'tag' => '', |
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'date_format' => 'Y/m/d', |
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'search_on_click' => true, |
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'wrap' => true, |
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'content_length' => 15, |
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'scroll_offset' => 15 |
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); |
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|
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/** |
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* An array of all possible columns and their default heading, priority, and column width. |
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* Initialised once on construction. |
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*/ |
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private static $column_defaults = array(); |
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private static $allowed_columns = array(); |
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|
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/** |
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* Stores the number of tables on this page. Used to generate the table ID. |
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*/ |
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private static $table_count = 1; |
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|
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public function __construct() { |
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if ( empty( self::$column_defaults ) ) { |
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/** |
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* Priority values are used to determine visiblity at small screen sizes (1 = highest priority, 6 = lowest priority). |
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* Column widths are automatically calculated by DataTables, but can be overridden by using filter 'posts_data_table_column_defaults'. |
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*/ |
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self::$column_defaults = array( |
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'id' => array( |
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'heading' => __( 'ID', 'posts-data-table' ), |
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'priority' => 3, |
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'width' => '' |
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), |
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'title' => array( |
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'heading' => __( 'Title', 'posts-data-table' ), |
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'priority' => 1, |
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'width' => '' |
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), |
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'category' => array( |
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'heading' => __( 'Categories', 'posts-data-table' ), |
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'priority' => 6, |
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'width' => '' |
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), |
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'tags' => array( |
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'heading' => __( 'Tags', 'posts-data-table' ), |
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'priority' => 7, |
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'width' => '' |
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), |
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'date' => array( |
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'heading' => __( 'Date', 'posts-data-table' ), |
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'priority' => 2, |
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'width' => '' |
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), |
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'author' => array( |
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'heading' => __( 'Author', 'posts-data-table' ), |
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'priority' => 4, |
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'width' => '' |
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), |
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'content' => array( |
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'heading' => __( 'Content', 'posts-data-table' ), |
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'priority' => 5, |
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'width' => '' |
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) |
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); |
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} |
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|
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if ( empty( self::$allowed_columns ) ) { |
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self::$allowed_columns = array_keys( self::$column_defaults ); |
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} |
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} |
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|
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/** |
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* Retrieves a data table containing a list of posts based on the specified arguments. |
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* |
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* @param array $args An array of options used to display the posts table |
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* @return string The posts table HTML output |
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*/ |
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public function get_table( $args ) { |
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|
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$args = wp_parse_args( $args, self::$default_args ); |
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|
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if ( empty( $args['columns'] ) ) { |
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$args['columns'] = self::$default_args['columns']; |
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} |
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|
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$args['rows_per_page'] = filter_var( $args['rows_per_page'], FILTER_VALIDATE_INT ); |
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|
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if ( ($args['rows_per_page'] < 1) || !$args['rows_per_page'] ) { |
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$args['rows_per_page'] = false; |
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} |
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|
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if ( !in_array( $args['sort_by'], self::$allowed_columns ) ) { |
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$args['sort_by'] = self::$default_args['sort_by']; |
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} |
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|
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if ( !in_array( $args['sort_order'], array( 'asc', 'desc' ) ) ) { |
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$args['sort_order'] = self::$default_args['sort_order']; |
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} |
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|
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// Set default sort direction |
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if ( !$args['sort_order'] ) { |
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if ( $args['sort_by'] === 'date' ) { |
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$args['sort_order'] = 'desc'; |
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} else { |
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$args['sort_order'] = 'asc'; |
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} |
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} |
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|
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$args['search_on_click'] = filter_var( $args['search_on_click'], FILTER_VALIDATE_BOOLEAN ); |
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$args['wrap'] = filter_var( $args['wrap'], FILTER_VALIDATE_BOOLEAN ); |
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$args['content_length'] = filter_var( $args['content_length'], FILTER_VALIDATE_INT ); |
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$args['scroll_offset'] = filter_var( $args['scroll_offset'], FILTER_VALIDATE_INT ); |
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|
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if ( empty( $args['date_format'] ) ) { |
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$args['date_format'] = self::$default_args['date_format']; |
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} |
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|
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$output = $table_head = $table_body = $body_row_fmt = ''; |
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|
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// Start building the args needed for our posts query |
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$post_args = array( |
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'post_type' => 'post', |
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'posts_per_page' => apply_filters( 'posts_data_table_post_limit', 1000 ), |
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'post_status' => 'publish', |
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'suppress_filters' => false // Ensure WPML filters run on this query |
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); |
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|
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if ( !empty( $args['category'] ) ) { |
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if ( is_numeric( $args['category'] ) ) { |
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$post_args['cat'] = $args['category']; |
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} else { |
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$category = get_category_by_slug( $args['category'] ); |
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|
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if ( $category ) { |
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$post_args['category_name'] = $category->slug; |
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} |
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} |
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} |
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|
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if ( !empty( $args['tag'] ) ) { |
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if ( is_numeric( $args['tag'] ) ) { |
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$post_args['tag_id'] = $args['tag']; |
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} else { |
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$post_args['tag'] = $args['tag']; |
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} |
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} |
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|
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// Get all published posts in the current language |
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$all_posts = get_posts( $post_args ); |
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|
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// Bail early if no posts found |
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if ( !$all_posts || !is_array( $all_posts ) ) { |
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return $output; |
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} |
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|
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// Allow theme/plugins to override defaults |
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$column_defaults = apply_filters( 'posts_data_table_column_defaults_' . self::$table_count, apply_filters( 'posts_data_table_column_defaults', self::$column_defaults ) ); |
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|
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// Get the columns to be used in this table |
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$columns = array_filter( array_map( 'trim', explode( ',', strtolower( $args['columns'] ) ) ) ); |
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$hidden_columns = array(); |
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|
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// If none of the user-specfied columns are valid, use the default columns instead |
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if ( !array_intersect( self::$allowed_columns, $columns ) ) { |
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$columns = explode( ',', self::$default_args['columns'] ); |
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} |
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|
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// Set hidden columns and sort indexes |
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$table_sort_index = array_search( $args['sort_by'], $columns ); |
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$date_sort_index = false; |
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$hidden_date = in_array( 'date', $columns ) || 'date' === $args['sort_by']; |
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|
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if ( $hidden_date ) { |
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$hidden_columns[] = 'timestamp'; |
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$date_sort_index = count( $columns ); |
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|
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// If we're sorting by date, make sure we use this hidden column for the initial table sort |
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if ( 'date' === $args['sort_by'] && false === $table_sort_index ) { |
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$table_sort_index = $date_sort_index; |
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} |
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} |
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|
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if ( false === $table_sort_index ) { |
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// Sort column is not in list of displayed columns so we'll add it as a hidden column at end of table |
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$hidden_columns[] = $args['sort_by']; |
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|
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// Set the table sort index to the index of the hidden sort column |
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$table_sort_index = $date_sort_index ? $date_sort_index + 1 : count( $columns ); |
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} |
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|
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// Build table header |
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$heading_fmt = '<th data-name="%1$s" data-priority="%2$u" data-width="%3$s"%5$s>%4$s</th>'; |
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$cell_fmt = '<td>{%s}</td>'; |
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|
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foreach ( $columns as $column ) { |
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// Double-check column name is valid |
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if ( !in_array( $column, self::$allowed_columns ) ) { |
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continue; |
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} |
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|
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// Do we need to use custom data for ordering this column? |
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$order_data = ''; |
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|
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if ( 'date' === $column && false !== $date_sort_index ) { |
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$order_data = sprintf( ' data-order-data="%u"', $date_sort_index ); |
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} |
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|
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// Add heading to table |
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$table_head .= sprintf( $heading_fmt, $column, $column_defaults[$column]['priority'], $column_defaults[$column]['width'], $column_defaults[$column]['heading'], $order_data ); |
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|
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// Add placeholder to table body format string so that content for this column is included in table output |
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$body_row_fmt .= sprintf( $cell_fmt, $column ); |
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} |
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|
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foreach ( $hidden_columns as $column ) { |
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$table_head .= sprintf( '<th data-name="%s" data-visible="false"></th>', $column ); |
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|
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// Make sure data for the hidden column is included in table content |
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$body_row_fmt .= sprintf( $cell_fmt, $column ); |
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} |
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|
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$table_head = sprintf( '<thead><tr>%s</tr></thead>', $table_head ); |
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|
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// Build table body |
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$body_row_fmt = '<tr>' . $body_row_fmt . '</tr>'; |
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|
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// Loop through posts and add a row for each |
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foreach ( (array) $all_posts as $_post ) { |
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setup_postdata( $_post ); |
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|
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// Format title |
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$title = sprintf( '<a href="%1$s">%2$s</a>', get_permalink( $_post ), get_the_title( $_post ) ); |
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|
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// Format author |
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$author = sprintf( |
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'<a href="%1$s" title="%2$s" rel="author">%3$s</a>', esc_url( get_author_posts_url( $_post->post_author ) ), esc_attr( sprintf( __( 'Posts by %s', 'posts-data-table' ), get_the_author() ) ), get_the_author() |
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); |
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|
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$post_data_trans = array( |
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'{id}' => $_post->ID, |
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'{title}' => $title, |
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'{category}' => get_the_category_list( ', ', '', $_post->ID ), |
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'{tags}' => get_the_tag_list( '', ', ', '', $_post->ID ), |
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'{date}' => get_the_date( $args['date_format'], $_post ), |
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'{author}' => $author, |
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'{content}' => $this->get_post_content( $args['content_length'] ), |
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'{timestamp}' => $_post->post_date |
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); |
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|
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$table_body .= strtr( $body_row_fmt, $post_data_trans ); |
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} // foreach post |
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|
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wp_reset_postdata(); |
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|
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$table_body = sprintf( '<tbody>%s</tbody>', $table_body ); |
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|
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$paging_attr = 'false'; |
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if ( ( $args['rows_per_page'] > 1 ) && ( $args['rows_per_page'] < count( $all_posts ) ) ) { |
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$paging_attr = 'true'; |
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} |
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|
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// Order attribute should be escaped here rather than in sprintf below as we don't want to escape the double-quotes around "asc" or "desc" |
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$order_attr = ( $table_sort_index === false ) ? '' : sprintf( '[[%u, "%s"]]', esc_attr( $table_sort_index ), esc_attr( $args['sort_order'] ) ); |
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$offset_attr = ( $args['scroll_offset'] === false ) ? 'false' : $args['scroll_offset']; |
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|
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$table_class = 'posts-data-table'; |
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if ( !$args['wrap'] ) { |
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$table_class .= ' nowrap'; |
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} |
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|
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$output = sprintf( |
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'<table ' |
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. 'id="posts-table-%1$u" ' |
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. 'class="%2$s" ' |
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. 'data-page-length="%3$u" ' |
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. 'data-paging="%4$s" ' |
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. 'data-order=\'%5$s\' ' |
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. 'data-click-filter="%6$s" ' |
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. 'data-scroll-offset="%7$s" ' |
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. 'cellspacing="0" width="100%%">' |
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. '%8$s%9$s' . |
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'</table>', self::$table_count, esc_attr( $table_class ), esc_attr( $args['rows_per_page'] ), esc_attr( $paging_attr ), $order_attr, ( $args['search_on_click'] ? 'true' : 'false' ), esc_attr( $offset_attr ), $table_head, $table_body |
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); |
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|
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// Increment the table count |
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self::$table_count++; |
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|
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return $output; |
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} |
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|
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/** |
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* Retrieve the post content, truncated to the number of words specified by $num_words. |
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* |
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* Must be called with the Loop or a secondary loop after a call to setup_postdata(). |
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* |
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* @param int $num_words The number of words to trim the content to |
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* @return string The (truncated) post content |
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*/ |
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private function get_post_content( $num_words = 15 ) { |
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$text = get_the_content( '' ); |
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$text = strip_shortcodes( $text ); |
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$text = apply_filters( 'the_content', $text ); |
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$text = wp_trim_words( $text, $num_words, ' …' ); |
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return $text; |
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} |
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|
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} |
