Relevanssi custom field filter

relevanssi-custom-field-filter.php

<?php

// Add all three functions to theme functions.php, then call rlv_customfield_dropdown() on your search results template

add_filter('relevanssi_hits_filter', 'rlv_gather_categories', 99);
function rlv_gather_categories($hits) {
    global $rlv_categories_present;
    $rlv_categories_present = array();
	$posts = array();
	$today = date("Y-m-d");
    foreach ( $hits[0] as $hit ) {
	$event_date = get_post_meta( $hit->ID, 'event_date', true );
	if ($event_date < $today) continue;
	    $posts[] = $hit;
        $terms = get_post_meta( $hit->ID, '_wmw_mbe_age' );
        if (is_array($terms)) {
            foreach ( $terms as $term ) {
                $rlv_categories_present[$term] = true;
            }
        }
    }
    asort( array_keys($rlv_categories_present) );
	$hits[0] = $posts;
    return $hits;
}

add_filter('relevanssi_modify_wp_query', 'rlv_custom_field_filter');
function rlv_custom_field_filter($query) {
	$tax_query = array('relation' => 'OR');
	$cat_set = false;
	if (isset($_GET['cat1'])) {
		$tax_query[] = array(
			'taxonomy' => 'category',
			'terms' => $_GET['cat1'],
			'field' => 'term_id',
		);
		$cat_set = true;
	}
	if (isset($_GET['cat2'])) {
		$tax_query[] = array(
			'taxonomy' => 'category',
			'terms' => $_GET['cat2'],
			'field' => 'term_id',
		);
		$cat_set = true;
	}
	if ($cat_set) $query->set('tax_query', $tax_query);
	if (isset($_GET['value'])) {
		$meta_query = array(
			array(
				'key' => 'total_sidebar_layout',
				'value' => $_GET['value'],
			),
		);
		$query->set('meta_query', $meta_query);
	}
	return $query;
}

function rlv_category_dropdown() {
    global $rlv_categories_present, $wp_query;
 
    if (!empty($_GET['value'])) {
        $url = esc_url(remove_query_arg('value'));
        echo "<p><a href='$url'>Remove custom field filter</a>.</p>";
    }
    else {
        $select = "<select id='rlv_meta' name='rlv_meta'><option value=''>Choose a value</option>";
        foreach ( $rlv_categories_present as $cat_id => $cat_name ) {
            $select .= "<option>$cat_name</option>";
        }
        $select .= "</select>";
        $url = remove_query_arg('paged');
        if (strpos($url, 'page') !== false) {
            $url = preg_replace('/page\/\d+\//', '', $url);
        }

        $select .= <<<EOH
 
 <button id="category_1" value="34">Toggle Cat 1</button>
 <button id="category_2" value="2">Toggle Cat 2</button>
 
<script>
<!--
    var button_1 = document.getElementById("category_1");
 	function onButtonOne() {
 		url = toggle("$url", "cat1", button_1.value);
 	   location.href = url;
 	}
 	button_1.onclick = onButtonOne;

    var button_2 = document.getElementById("category_2");
 	function onButtonTwo() {
 		url = toggle("$url", "cat2", button_2.value);
 	   location.href = url;
 	}
 	button_2.onclick = onButtonTwo;
 	
    var dropdown = document.getElementById("rlv_meta");
    function onCatChange() {
        if ( dropdown.selectedIndex > 0 ) {
            location.href = "$url"+"&value="+dropdown.options[dropdown.selectedIndex].value;
        }
    }
    dropdown.onchange = onCatChange;
    
    function toggle(url, key, val) {
    var out = [],
        upd = '',
        rm = "([&?])" + key + "=([^&]*?,)?" + val + "(,.*?)?(&.*?)?$",
        ad = key + "=",
        rmrplr = function(url, p1, p2, p3, p4) {
            if (p2) {
                if (p3) out.push(p1, key, '=', p2, p3.substr(1));
                else out.push(p1, key, '=', p2.substr(0, p2.length - 1));
            } else {
                if (p3) out.push(p1, key, '=', p3.substr(1));
                else out.push(p1);
            }
            if (p4) out.push(p4);
            return out.join('').replace(/([&?])&/, '$1').replace(/[&?]$/, ''); //<!2
        },
        adrplr = function(s) {
            return s + val + ',';
        };
    if ((upd = url.replace(new RegExp(rm), rmrplr)) != url) return upd;
    if ((upd = url.replace(new RegExp(ad), adrplr)) != url) return upd;
    return url + (/\?.+/.test(url) ? '&' : '?') + key + '=' + val; //<!1
}
-->
</script>
EOH;
 
        echo $select;
    }
}

?>