350 lines
10 KiB
PHP
350 lines
10 KiB
PHP
<?php
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/**
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* Plugin Name: Content Filter
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* Description: Adds filtering for the content typed by various taxonomies.
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* Version: 1.2.0
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* Author: Keith Solomon
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*/
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if (!defined('ABSPATH')) { exit; } // Prevent direct access
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require_once plugin_dir_path(__FILE__) . 'includes/template-loader.php';
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class ResourceFilterPlugin {
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/**
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* Registers the necessary actions and filters.
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*
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* Adds a shortcode handler for the 'resource_filter' shortcode.
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* Enqueues the necessary scripts and styles.
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* Adds an AJAX handler for filtering resources.
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*
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* @since 1.0.0
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*/
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public function __construct() {
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add_shortcode('resource_filter', [$this, 'renderFilterForm']);
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add_action('wp_enqueue_scripts', [$this, 'enqueueScripts']);
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add_action('wp_ajax_filter_resources', [$this, 'filterResources']);
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add_action('wp_ajax_nopriv_filter_resources', [$this, 'filterResources']);
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}
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/**
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* Enqueues the necessary scripts and styles for the resource filter.
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*
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* Checks if the 'resource_filter' shortcode is present on the page before loading.
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* Includes a CSS style and a JavaScript file specific to the plugin.
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* Localizes the script with AJAX URL and nonce for secure AJAX requests.
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*
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* @since 1.0.0
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*/
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public function enqueueScripts() {
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// Load script only if the shortcode is present on the page
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if (!is_admin() && has_shortcode(get_post_field('post_content', get_the_ID()), 'resource_filter')) {
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wp_enqueue_style('resource-filter-style', plugins_url('assets/style.css', __FILE__));
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wp_enqueue_script('resource-filter-script', plugins_url('assets/script.js', __FILE__), ['jquery'], null, true);
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wp_localize_script('resource-filter-script', 'resourceFilterAjax', [
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'ajaxurl' => admin_url('admin-ajax.php'),
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'nonce' => wp_create_nonce('resource_filter_nonce')
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]);
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}
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}
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/**
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* Renders the resource filter form.
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*
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* Loads the filter form template and displays a summary of the total resources.
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* Displays the number of resources and applied filters.
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* Calls the loadResources method to display the initial list of resources.
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*
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* @return string The HTML output of the filter form and resource list.
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*
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* @since 1.0.0
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*/
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public function renderFilterForm($atts) {
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$atts = shortcode_atts([
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'type' => 'default' // Accepts 'default' or 'homepage'
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], $atts, 'resource_filter');
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ob_start();
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if ($_SERVER['REQUEST_METHOD'] === 'POST') {
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$sort_order = isset($_POST['sort_order']) ? sanitize_text_field($_POST['sort_order']) : 'date_desc';
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$query_args = [
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'post_type' => 'resource',
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'posts_per_page' => 12, // Show 12 results per page
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'paged' => max(1, get_query_var('paged', 1)), // Get current page number
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'tax_query' => [],
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's' => isset($_POST['search']) ? sanitize_text_field($_POST['search']) : '',
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];
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// Sorting logic
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switch ($sort_order) {
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case 'date_asc':
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$query_args['orderby'] = 'date';
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$query_args['order'] = 'ASC';
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break;
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case 'date_desc':
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$query_args['orderby'] = 'date';
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$query_args['order'] = 'DESC';
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break;
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case 'title_asc':
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$query_args['orderby'] = 'title';
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$query_args['order'] = 'ASC';
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break;
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case 'title_desc':
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$query_args['orderby'] = 'title';
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$query_args['order'] = 'DESC';
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break;
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default:
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$query_args['orderby'] = 'date';
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$query_args['order'] = 'DESC';
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}
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$tax_query = [];
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if (!empty($_POST['resource_type'])) {
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$resType = is_array($_POST['resource_type']) ? array_map('sanitize_text_field', $_POST['resource_type']) : sanitize_text_field($_POST['resource_type']);
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$query_args['tax_query'][] = [
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'taxonomy' => 'resource_type',
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'field' => 'slug',
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'terms' => $resType,
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'operator' => 'IN'
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];
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}
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if (!empty($_POST['resource_subject'])) {
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$query_args['tax_query'][] = [
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'taxonomy' => 'resource_subject',
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'field' => 'slug',
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'terms' => array_map('sanitize_text_field', $_POST['resource_subject']),
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'operator' => 'IN'
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];
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}
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if (!empty($tax_query)) {
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$query_args['tax_query'] = [
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'relation' => 'AND', // Both filters must match
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...$tax_query
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];
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}
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$query = new WP_Query($query_args);
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} else {
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$query = new WP_Query([
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'post_type' => 'resource',
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'posts_per_page' => 12, // Show 12 results per page
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'paged' => max(1, get_query_var('paged', 1)), // Get current page number
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]);
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}
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$resTotal = $query->found_posts; // Default total resource count
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// Determine which form template to load
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$attTmpl = ($atts['type'] === 'homepage') ? 'filter-homepage.php' : 'filter-form.php';
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$resForm = rfGetTemplate($attTmpl);
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$summary = rfGetTemplate('filter-summary.php');
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if ($resForm) {
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include_once $resForm;
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} else {
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echo '<p>Error: Form template not found.</p>';
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}
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if ($atts['type'] === 'default') {
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if ($summary) {
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include_once $summary;
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} else {
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echo '<p>Error: Summary template not found.</p>';
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}
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?>
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<div id="resource-results">
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<?php
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if ($_SERVER['REQUEST_METHOD'] === 'POST') {
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$this->filterResources(); // Directly render filtered results
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} else {
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$this->loadResources(); // Load all resources initially
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}
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$pagination_links = paginate_links([
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'total' => $query->max_num_pages,
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'current' => max(1, get_query_var('paged', 1)),
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'format' => '?paged=%#%',
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'prev_text' => '«',
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'next_text' => '»',
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'type' => 'list'
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]);
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?>
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</div>
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<?php
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if ($pagination_links) {
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echo '<div class="pagination">' . $pagination_links . '</div>';
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}
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}
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return ob_get_clean();
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}
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/**
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* Load and display resources.
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*
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* @return void
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*
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* @since 1.0.0
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*/
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public function loadResources() {
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$query_args = [
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'post_type' => 'resource',
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'posts_per_page' => 12, // Show 12 results per page
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'paged' => max(1, get_query_var('paged', 1)), // Get current page number
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];
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$query = new WP_Query($query_args);
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$resources = $query->posts;
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$resResults = rfGetTemplate('resource-results.php');
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if ($resResults) {
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include_once $resResults;
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} else {
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echo '<p>Error: Results template not found.</p>';
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}
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wp_reset_postdata();
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}
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/**
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* AJAX handler for filtering resources.
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*
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* Searches for resources based on search term, resource type, and/or resource subject.
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* Returns a JSON response with the count of resources found and the HTML for the resource results.
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*
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* Verifies the nonce and sanitizes the input data.
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*
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* @since 1.0.0
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*/
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public function filterResources() {
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$is_ajax = defined('DOING_AJAX') && DOING_AJAX;
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if ($is_ajax) {
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check_ajax_referer('resource_filter_nonce', 'nonce');
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}
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$sort_order = isset($_POST['sort_order']) ? sanitize_text_field($_POST['sort_order']) : 'date_desc';
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$query_args = [
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'post_type' => 'resource',
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'posts_per_page' => 12, // Show 12 results per page
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'paged' => isset($_POST['paged']) ? intval($_POST['paged']) : 1, // Get current page number
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'tax_query' => [],
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's' => isset($_POST['search']) ? sanitize_text_field($_POST['search']) : '',
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];
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// Sorting logic
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switch ($sort_order) {
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case 'date_asc':
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$query_args['orderby'] = 'date';
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$query_args['order'] = 'ASC';
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break;
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case 'date_desc':
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$query_args['orderby'] = 'date';
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$query_args['order'] = 'DESC';
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break;
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case 'title_asc':
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$query_args['orderby'] = 'title';
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$query_args['order'] = 'ASC';
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break;
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case 'title_desc':
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$query_args['orderby'] = 'title';
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$query_args['order'] = 'DESC';
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break;
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default:
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$query_args['orderby'] = 'date';
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$query_args['order'] = 'DESC';
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}
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$tax_query = [];
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if (!empty($_POST['resource_type'])) {
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$resType = is_array($_POST['resource_type']) ? array_map('sanitize_text_field', $_POST['resource_type']) : sanitize_text_field($_POST['resource_type']);
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$query_args['tax_query'][] = [
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'taxonomy' => 'resource_type',
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'field' => 'slug',
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'terms' => $resType,
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'operator' => 'IN'
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];
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}
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if (!empty($_POST['resource_subject'])) {
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$query_args['tax_query'][] = [
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'taxonomy' => 'resource_subject',
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'field' => 'slug',
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'terms' => array_map('sanitize_text_field', $_POST['resource_subject']),
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'operator' => 'IN'
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];
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}
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if (!empty($tax_query)) {
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$query_args['tax_query'] = [
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'relation' => 'AND', // Both filters must match
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...$tax_query
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];
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}
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$query = new WP_Query($query_args);
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ob_start();
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$resources = $query->posts;
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$resResults = rfGetTemplate('resource-results.php');
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if ($resResults) {
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include_once $resResults;
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} else {
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echo '<p>Error: Results template not found.</p>';
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}
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if ($is_ajax) {
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// Prepare response JSON
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$response = [
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'count' => $query->found_posts,
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'filters' => [
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'search' => isset($_POST['search']) ? sanitize_text_field($_POST['search']) : '',
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'resource_type' => !empty($_POST['resource_type']) ? sanitize_text_field($_POST['resource_type']) : '',
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'resource_subject' => !empty($_POST['resource_subject']) ? sanitize_text_field($_POST['resource_subject']) : ''
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],
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'html' => ob_get_clean(),
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'pagination' => paginate_links([
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'total' => $query->max_num_pages,
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'current' => isset($_POST['paged']) ? intval($_POST['paged']) : 1,
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'format' => '?paged=%#%',
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'add_args' => [], // Pass additional query arguments
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'prev_text' => '«',
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'next_text' => '»',
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'type' => 'array',
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// 'before_page_number' => (isset($_POST['paged']) && intval($_POST['paged']) === 1) ? '?paged=1' : '',
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])
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];
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echo json_encode($response);
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wp_die();
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} else {
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echo ob_get_clean();
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}
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}
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}
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new ResourceFilterPlugin();
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