Update: Attempt 1 at redoing plugin structure

functions.php

@@ -1,20 +1,114 @@
-function sd_orderby_taxonomy( $clauses, $query ) {
-    if ( isset( $query->query_vars['orderby_taxonomy'] ) && 'sd_semester' === $query->query_vars['orderby_taxonomy'] ) {
-        global $wpdb;
-
-        // Join term relationships for the taxonomy
-        $clauses['join'] .= " 
-            LEFT JOIN {$wpdb->term_relationships} AS tr ON {$wpdb->posts}.ID = tr.object_id
-            LEFT JOIN {$wpdb->term_taxonomy} AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id
-            LEFT JOIN {$wpdb->terms} AS t ON tt.term_id = t.term_id";
+<?php
+// Shortcode to display projects with filter, search, and pagination
+function sd_project_display($atts) {
+    ob_start();
+
+    // Get query variables
+    $selected_semesters = isset($_GET['selected_semesters']) ? array_map('sanitize_text_field', explode(',', wp_unslash($_GET['selected_semesters']))) : [];
+    $search = isset($_GET['search']) ? sanitize_text_field(wp_unslash($_GET['search'])) : '';    
+    $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
+
+    $args = array(
+        'post_type' => 'sd_project',
+        'posts_per_page' => 10,
+        'paged' => $paged,
+        's' => $search,
+        'orderby' => 'title',
+        'order' => 'ASC',
+    );
+
+    if (!empty($selected_semesters)) {
+        $args['tax_query'] = array(
+            array(
+                'taxonomy' => 'sd_semester',
+                'field' => 'slug',
+                'terms' => $selected_semesters,
+            ),
+        );
+    }
+
+    $query = new WP_Query($args);
+
+    // Display semester dropdown
+    $terms = get_terms(array(
+        'taxonomy' => 'sd_semester',
+        'hide_empty' => false,
+    ));
+
+    echo '<form method="GET" action="">';
+    echo '<input type="text" name="search" placeholder="Search..." value="' . esc_attr($search) . '">';
+    echo '<select name="selected_semesters[]" multiple>';
+    foreach ($terms as $term) {
+        $selected = in_array($term->slug, $selected_semesters) ? 'selected' : '';
+        echo '<option value="' . esc_attr($term->slug) . '" ' . $selected . '>' . esc_html($term->name) . '</option>';
+    }
+    echo '</select>';
+    echo '<button type="submit">Filter</button>';
+    echo '</form>';
+
+    // Group projects by their semester term
+    $grouped_projects = array();
+
+    if ($query->have_posts()) {
+        while ($query->have_posts()) {
+            $query->the_post();
+            $post_id = get_the_ID();
+            $terms = get_the_terms($post_id, 'sd_semester');
+
+            if ($terms && !is_wp_error($terms)) {
+                foreach ($terms as $term) {
+                    $grouped_projects[$term->slug][] = $post_id;
+                }
+            } else {
+                $grouped_projects['uncategorized'][] = $post_id;
+            }
+        }
+        wp_reset_postdata();
+    }
+
+    // Output each semester group
+    foreach ($grouped_projects as $semester_slug => $posts) {
+        if ('uncategorized' === $semester_slug) {
+            $semester_name = 'Uncategorized';
+        } else {
+            $term_obj = get_term_by('slug', $semester_slug, 'sd_semester');
+            $semester_name = $term_obj ? $term_obj->name : $semester_slug;
+        }
 
-        // Ensure we're filtering to the correct taxonomy 
-        $clauses['where'] .= $wpdb->prepare( " AND tt.taxonomy = %s", 'sd_semester' );
+        echo '<h2>' . esc_html($semester_name) . ' Projects</h2>';
+        echo '<div class="semester-projects">';
 
-        // Set the ORDER BY to be the term name (or change to term_id as needed)
-        $order = strtoupper( $query->get( 'order' ) ) === 'DESC' ? 'DESC' : 'ASC';
-        $clauses['orderby'] = " t.name " . $order;
+        foreach ($posts as $post_id) {
+            $post = get_post($post_id);
+            setup_postdata($post);
+
+            echo '<div class="card">';
+            echo '<h3>' . get_the_title($post_id) . '</h3>';
+            echo '<p>' . get_the_excerpt($post_id) . '</p>';
+            echo '</div>';
+        }
+        wp_reset_postdata();
+        echo '</div>';
+    }
+
+    // Pagination controls
+    $total_pages = $query->max_num_pages;
+    if ($total_pages > 1) {
+        echo '<nav class="pagination">';
+        echo paginate_links(array(
+            'total' => $total_pages,
+            'current' => $paged,
+        ));
+        echo '</nav>';
     }
-    return $clauses;
+
+    return ob_get_clean();
+}
+add_shortcode('sd_project_display', 'sd_project_display');
+
+function sd_enqueue_scripts() {
+    wp_enqueue_style('select2-css', 'https://cdn.jsdelivr.net/npm/[email protected]/dist/css/select2.min.css');
+    wp_enqueue_script('select2-js', 'https://cdn.jsdelivr.net/npm/[email protected]/dist/js/select2.min.js', array('jquery'), null, true);
+    wp_enqueue_script('sd-custom-js', plugin_dir_url(__FILE__) . 'js/custom.js', array('jquery', 'select2-js'), null, true);
 }
-add_filter( 'posts_clauses', 'sd_orderby_taxonomy', 10, 2 );
+add_action('wp_enqueue_scripts', 'sd_enqueue_scripts');

includes/senior-design-v2.php

@@ -175,7 +175,7 @@ function sd_project_display($atts) {
             echo '<div class="card-box col-12">';
             echo '<div class="card sd-card">';
             echo '    <div class="card-body">';
-            echo '        <h5 class="card-title my-3">' . get_the_title() . '</h5>';
+            echo '        <h5 class="card-title my-3">' . get_the_title($post_id) . '</h5>';
             if ($sponsor)
                 echo '        <p class="my-1"><strong>Sponsor: </strong> ' . esc_html($sponsor) . ' </p>';
             if ($contributors)

src/js/custom.js

@@ -0,0 +1,38 @@
+jQuery(document).ready(function($) {
+    $('#multiSemesterSelector').select2({
+        placeholder: 'Select semesters',
+        allowClear: true,
+    });
+
+    $('#utility-bar').on('submit', function(event) {
+        event.preventDefault();
+        var url = new URL(window.location);
+        var params = new URLSearchParams(url.search);
+
+        var search = $('#searchFilter').val().trim();
+        if (search) {
+            params.set('search', search);
+        } else {
+            params.delete('search');
+        }
+
+        var selectedSemesters = $('#multiSemesterSelector').val();
+        if (selectedSemesters && selectedSemesters.length > 0) {
+            params.set('selected_semesters', selectedSemesters.join(','));
+        } else {
+            params.delete('selected_semesters');
+        }
+
+        params.set('paged', 1);
+        window.location.search = params.toString();
+    });
+
+    $('.pagination a').on('click', function(event) {
+        event.preventDefault();
+        var page = $(this).data('page');
+        var url = new URL(window.location);
+        var params = new URLSearchParams(url.search);
+        params.set('paged', page);
+        window.location.search = params.toString();
+    });
+});