Custom Filters CPT + Taxonomies [Shortcode]

functions.php

<?php

/* Litigation Filters */

function multi_filter_litigation_cases_shortcode($atts) {
    // Get filter values from URL parameters or defaults
    $state = isset($_GET['state']) ? sanitize_text_field($_GET['state']) : '';
    $issue = isset($_GET['issue']) ? sanitize_text_field($_GET['issue']) : '';
    $case_status = isset($_GET['case_status']) ? sanitize_text_field($_GET['case_status']) : '';

    // Set the query arguments
    $args = array(
        'post_type' => 'litigation',
        'posts_per_page' => -1, // Show all cases
        'orderby' => 'title',
        'order' => 'ASC',
    );

    // Initialize tax_query for multiple taxonomies
    $tax_query = array('relation' => 'AND'); // Ensure multiple filters work together

    // Add State filter if specified
    if ($state) {
        $tax_query[] = array(
            'taxonomy' => 'litigation_states',
            'field'    => 'slug',
            'terms'    => $state,
        );
    }

    // Add Voting Issue filter if specified
    if ($issue) {
        $tax_query[] = array(
            'taxonomy' => 'litigation_categories',
            'field'    => 'slug',
            'terms'    => $issue,
        );
    }

    // Add Litigation Case status filter if specified
    if ($case_status) {
        $tax_query[] = array(
            'taxonomy' => 'litigation_cases',
            'field'    => 'slug',
            'terms'    => $case_status,
        );
    }

    // If there are any tax queries, add them to the main query
    if (count($tax_query) > 1) { // Means there are filters applied
        $args['tax_query'] = $tax_query;
    }

    // Query the litigation cases
    $query = new WP_Query($args);

    // Start output buffer
    ob_start();

    // Filter form for users to select their filters
    ?>
    <form method="get" action="" class="litigation_form" style="display: flex; justify-content: space-between; align-items: center;">
        <div class="litigation_search" style="flex: 1; display: flex; justify-content: flex-start; gap: 20px;">
            <label for="state" style="width: 300px;">
                Select State:
                <select name="state" id="state" class="litigation-select">
                    <option value="">All States</option>
                    <?php
                    $states = get_terms(array(
                        'taxonomy' => 'litigation_states', // Taxonomy for states
                        'orderby' => 'name', // Sort by name (A-Z)
                        'order'   => 'ASC', // Ascending order
                        'hide_empty' => false
                    ));
                    foreach ($states as $state_term) {
                        echo '<option value="' . $state_term->slug . '" ' . selected($state, $state_term->slug, false) . '>' . $state_term->name . '</option>';
                    }
                    ?>
                </select>
            </label>

            <label for="issue" style="width: 400px;">
                Select Voting Issue:
                <select name="issue" id="issue" class="litigation-select">
                    <option value="">All Voting Issues</option>
                    <?php
                    $categories = get_terms(array(
                        'taxonomy' => 'litigation_categories',
                        'orderby' => 'name',
                        'order'   => 'ASC',
                        'hide_empty' => false
                    ));
                    foreach ($categories as $category) {
                        echo '<option value="' . $category->slug . '" ' . selected($issue, $category->slug, false) . '>' . $category->name . '</option>';
                    }
                    ?>
                </select>
            </label>

            <label for="case_status" style="width: 300px;">
                Filter by Case Status:
                <select name="case_status" id="case_status" class="litigation-select">
                    <option value="">All Cases</option>
                    <?php
                    $cases = get_terms(array(
                        'taxonomy' => 'litigation_cases',
                        'orderby' => 'name',
                        'order'   => 'ASC',
                        'hide_empty' => false
                    ));
                    foreach ($cases as $case) {
                        echo '<option value="' . $case->slug . '" ' . selected($case_status, $case->slug, false) . '>' . $case->name . '</option>';
                    }
                    ?>
                </select>
            </label>

        </div>

        <div class="litigation_button" style="flex: 1; display: flex; justify-content: flex-end; align-items: center; gap: 20px;">
            <input type="submit" value="Filter" class="filter_litigation">
            <a href="<?php echo esc_url(remove_query_arg(array('state', 'issue', 'case_status'))); ?>" class="reset_litigations">Reset Filters</a>
        </div>
    </form>

    <?php
    // Display the filtered cases in a grid
    if ($query->have_posts()) {
        echo '<div class="litigation-grid">'; // Start the grid container
        // Get states in alphabetical order
        $states_ordered = get_terms(array(
            'taxonomy' => 'litigation_states',
            'orderby' => 'name',
            'order' => 'ASC',
            'hide_empty' => false
        ));

        // Loop through states in alphabetical order
        foreach ($states_ordered as $state_term) {
            //echo '<h2>' . $state_term->name . '</h2>'; // Display state name

            // Query posts for each state
            $state_posts = new WP_Query(array(
                'post_type' => 'litigation',
                'tax_query' => array(
                    array(
                        'taxonomy' => 'litigation_states',
                        'field' => 'slug',
                        'terms' => $state_term->slug
                    )
                )
            ));

            // Check if there are posts for this state
            if ($state_posts->have_posts()) {
                while ($state_posts->have_posts()) {
                    $state_posts->the_post();

                    // Display individual post
                    echo '<div class="litigation_post">';
                    echo '<h3><a href="' . get_permalink() . '">' . get_the_title() . '</a></h3>';
                    echo '<p>' . wp_trim_words(get_the_excerpt(), 20, '...') . '</p>';
                    echo '<a href="' . get_permalink() . '">Read More</a>';
                    echo '</div>'; // End post
                }
            } else {
                echo '<p>No cases available for ' . $state_term->name . '</p>';
            }

            wp_reset_postdata(); // Reset post data after each state query
        }
        echo '</div>'; // End grid container
    } else {
        echo 'No cases found matching the selected filters.';
    }

    wp_reset_postdata();
    return ob_get_clean();
}

add_shortcode('multi_filter_litigation', 'multi_filter_litigation_cases_shortcode');


/* Advocacy Filters */

function multi_filter_advocacy_cases_shortcode($atts) {
    // Get filter values from URL parameters or defaults
    $state = isset($_GET['state']) ? sanitize_text_field($_GET['state']) : '';
    $issue = isset($_GET['issue']) ? sanitize_text_field($_GET['issue']) : '';

    // Initialize query arguments
    $args = array(
        'post_type' => 'advocacy', // Post type 'advocacy'
        'posts_per_page' => -1, // Show all posts
        'orderby' => 'title', // Sort posts alphabetically by title (optional for now)
        'order' => 'ASC', // Sorting order
    );

    // Initialize tax_query for filtering by state and issue
    $tax_query = array('relation' => 'AND'); // Ensure multiple filters work together

    // Add State filter if specified
    if ($state) {
        $tax_query[] = array(
            'taxonomy' => 'advocacy_states', // Taxonomy for states
            'field'    => 'slug',
            'terms'    => $state,
        );
    }

    // Add Voting Issue filter if specified
    if ($issue) {
        $tax_query[] = array(
            'taxonomy' => 'advocacy_categories', // Taxonomy for issues
            'field'    => 'slug',
            'terms'    => $issue,
        );
    }

    // Apply tax_query if there are filters
    if (count($tax_query) > 1) {
        $args['tax_query'] = $tax_query;
    }

    // Query the advocacy cases
    $query = new WP_Query($args);

    // Start output buffer
    ob_start();

    // Filter form for users to select their filters
    ?>
    <form method="get" action="" class="litigation_form" style="display: flex; justify-content: space-between; align-items: center;">
        <div class="litigation_search" style="flex: 1; display: flex; justify-content: flex-start; gap: 20px;">
            <label for="state" style="width: 300px;">
                Select State:
                <select name="state" id="state" class="litigation-select">
                    <option value="">All States</option>
                    <?php
                    // Fetch states and order them alphabetically
                    $states = get_terms(array(
                        'taxonomy' => 'advocacy_states', // Taxonomy for states
                        'orderby' => 'name', // Alphabetical order
                        'order' => 'ASC', // Ascending order
                        'hide_empty' => false
                    ));

                    // Display each state in the dropdown
                    foreach ($states as $state_term) {
                        echo '<option value="' . $state_term->slug . '" ' . selected($state, $state_term->slug, false) . '>' . $state_term->name . '</option>';
                    }
                    ?>
                </select>
            </label>

            <label for="issue" style="width: 400px;">
                Select Voting Issue:
                <select name="issue" id="issue" class="litigation-select">
                    <option value="">All Voting Issues</option>
                    <?php
                    // Fetch categories and order them alphabetically
                    $categories = get_terms(array(
                        'taxonomy' => 'advocacy_categories', // Taxonomy for issues
                        'orderby' => 'name',
                        'order' => 'ASC',
                        'hide_empty' => false
                    ));

                    foreach ($categories as $category) {
                        echo '<option value="' . $category->slug . '" ' . selected($issue, $category->slug, false) . '>' . $category->name . '</option>';
                    }
                    ?>
                </select>
            </label>
        </div>

        <div class="litigation_button" style="flex: 1; display: flex; justify-content: flex-end; align-items: center; gap: 20px;">
            <input type="submit" value="Filter" class="filter_litigation">
            <a href="<?php echo esc_url(remove_query_arg(array('state', 'issue'))); ?>" class="reset_litigations">Reset Filters</a>
        </div>
    </form>

    <?php
    // Display the filtered cases in a grid
    if ($query->have_posts()) {
        // Display posts ordered by state
        echo '<div class="litigation-grid">'; // Start grid
        $states_ordered = get_terms(array(
            'taxonomy' => 'advocacy_states',
            'orderby' => 'name',
            'order' => 'ASC',
            'hide_empty' => false
        ));

        // Loop through states in alphabetical order
        foreach ($states_ordered as $state_term) {
            //echo '<h2>' . $state_term->name . '</h2>'; // Display state name

            // Query posts for each state
            $state_posts = new WP_Query(array(
                'post_type' => 'advocacy',
                'tax_query' => array(
                    array(
                        'taxonomy' => 'advocacy_states',
                        'field' => 'slug',
                        'terms' => $state_term->slug
                    )
                )
            ));

            // Check if there are posts for this state
            if ($state_posts->have_posts()) {
                while ($state_posts->have_posts()) {
                    $state_posts->the_post();

                    // Display individual post
                    echo '<div class="litigation_post">';
                    echo '<h3><a href="' . get_permalink() . '">' . get_the_title() . '</a></h3>';
                    echo '<p>' . wp_trim_words(get_the_excerpt(), 20, '...') . '</p>';
                    echo '<a href="' . get_permalink() . '">Read More</a>';
                    echo '</div>'; // End post
                }
            } else {
                echo '<p>No posts available for ' . $state_term->name . '</p>';
            }

            wp_reset_postdata(); // Reset post data after each state query
        }
        echo '</div>'; // End grid
    } else {
        echo 'No cases found matching the selected filters.';
    }

    wp_reset_postdata();
    return ob_get_clean();
}

add_shortcode('multi_filter_advocacy', 'multi_filter_advocacy_cases_shortcode');