thalim-theme/taxonomy.php

<?php
$context = Timber::context();
$term     = get_queried_object();
$taxonomy = $term->taxonomy;

$context['term']           = Timber::get_term($term);
$context['taxonomy_slug']  = $taxonomy;
$context['term_id']        = $term->term_id;
$context['parent_slug']    = '';
$tax_object                = get_taxonomy($taxonomy);
$context['taxonomy_label'] = $tax_object ? $tax_object->labels->singular_name : $taxonomy;

$excluded_ids = [12, 31]; // Séance de séminaire, Non classé
if ( ! is_user_logged_in() ) $excluded_ids[] = 9; // Vie du labo

// Read filter query params
$active_axe       = isset($_GET['axe'])       ? intval($_GET['axe'])                    : 0;
$active_date_from = isset($_GET['date_from']) ? sanitize_text_field($_GET['date_from']) : '';
$active_date_to   = isset($_GET['date_to'])   ? sanitize_text_field($_GET['date_to'])   : '';
$active_cat_id    = isset($_GET['filter_cat'])    ? intval($_GET['filter_cat'])             : 0;
$filter_autres    = isset($_GET['filter_autres']) ? 1                                    : 0;

$context['active_axe']         = $active_axe;
$context['active_date_from']   = $active_date_from;
$context['active_date_to']     = $active_date_to;
$context['active_category_id'] = $filter_autres ? 'autres' : $active_cat_id;
$context['active_cat_id']      = $active_cat_id;
$context['filter_autres']      = $filter_autres;

// Determine active rubrique from active category (parent if subcategory, itself if top-level)
$active_rubrique_id = 0;
if ($active_cat_id) {
    $active_cat_obj     = get_category($active_cat_id);
    $active_rubrique_id = ($active_cat_obj && $active_cat_obj->parent)
        ? $active_cat_obj->parent
        : $active_cat_id;
}
$context['active_rubrique'] = $active_rubrique_id;

// Base params shared across all filter links (preserves active filters when navigating)
$base_filter_params = array_filter([
    'axe'       => $active_axe ?: null,
    'date_from' => $active_date_from ?: null,
    'date_to'   => $active_date_to ?: null,
]);

// Build tax_query — combine all clauses with AND
$tax_query = [
    'relation' => 'AND',
    // Terme de la taxonomie courante
    [
        'taxonomy' => $taxonomy,
        'field'    => 'term_id',
        'terms'    => [$term->term_id],
    ],
    // Exclure les séances de séminaire (catégorie 12)
    [
        'taxonomy' => 'category',
        'field'    => 'term_id',
        'terms'    => [12],
        'operator' => 'NOT IN',
    ],
];
if ($active_cat_id) {
    $tax_query[] = [
        'taxonomy'         => 'category',
        'field'            => 'term_id',
        'terms'            => [$active_cat_id],
        'include_children' => !$filter_autres,
    ];
}

// On axe_thematique pages, the current term IS the active axe (for display only — taxonomy query handles filtering)
$axe_taxonomy_mode = ($taxonomy === 'axe_thematique');
if ($axe_taxonomy_mode) {
    $active_axe = $term->term_id;
    $context['active_axe'] = $active_axe;
}

// Build remaining query args (meta/date)
$extra_query_args = [];
if ($active_axe && !$axe_taxonomy_mode) {
    $extra_query_args['meta_query'] = [[
        'key'   => 'axes_thematiques',
        'value' => $active_axe,
        'type'  => 'NUMERIC',
    ]];
}
if ($active_date_from || $active_date_to) {
    $extra_query_args['thalim_event_date_filter'] = ['from' => $active_date_from, 'to' => $active_date_to];
}

// Axes thématiques filter
$axes_groups = thalim_get_axes_filter_groups();
$current_axes = $axes_groups[0]['terms'] ?? [];
$context['filter_axes'] = $current_axes;
$context['axe_taxonomy_mode']   = $axe_taxonomy_mode;
$context['axe_stay_on_page']    = !$axe_taxonomy_mode;

// Build rubrique/catégorie filter links pointing back to the current taxonomy URL
$current_term_url = get_term_link($term);
$all_cats         = get_categories(['taxonomy' => 'category', 'hide_empty' => false, 'exclude' => $excluded_ids]);

$filter_parents = [];
foreach ($all_cats as $cat) {
    if ($cat->parent == 0) {
        $params = array_filter(array_merge($base_filter_params, ['filter_cat' => $cat->term_id]));
        $filter_parents[] = [
            'id'   => $cat->term_id,
            'name' => thalim_cat_name($cat),
            'slug' => $cat->slug,
            'link' => add_query_arg($params, $current_term_url),
        ];
    }
}
$context['filter_parents'] = $filter_parents;

$filter_categories = [];
if ($active_rubrique_id) {
    foreach ($all_cats as $cat) {
        if ($cat->parent == $active_rubrique_id) {
            $params = array_filter(array_merge($base_filter_params, ['filter_cat' => $cat->term_id]));
            $filter_categories[] = [
                'id'   => $cat->term_id,
                'name' => thalim_cat_name($cat),
                'slug' => $cat->slug,
                'link' => add_query_arg($params, $current_term_url),
            ];
        }
    }
}
// Add "Autres" entry if active rubrique has posts directly assigned to it
if ($active_rubrique_id && !empty($filter_categories)) {
    $lang = thalim_current_language();
    $direct_check = new WP_Query([
        'post_type'      => 'post',
        'posts_per_page' => 1,
        'fields'         => 'ids',
        'no_found_rows'  => true,
        'lang'           => '',
        'tax_query'      => [
            'relation' => 'AND',
            [
                'taxonomy' => $taxonomy,
                'field'    => 'term_id',
                'terms'    => [$term->term_id],
            ],
            [
                'taxonomy'         => 'category',
                'field'            => 'term_id',
                'terms'            => [$active_rubrique_id],
                'include_children' => false,
            ],
        ],
    ]);
    if ($direct_check->have_posts()) {
        $params = array_filter(array_merge($base_filter_params, ['filter_cat' => $active_rubrique_id, 'filter_autres' => 1]));
        $filter_categories[] = [
            'id'   => 'autres',
            'name' => $lang === 'en' ? 'Other' : 'Autres',
            'slug' => 'autres',
            'link' => add_query_arg($params, $current_term_url),
        ];
    }
}
$context['filter_categories'] = $filter_categories;

$posts = Timber::get_posts(array_merge([
    'post_type'               => 'post',
    'tax_query'               => $tax_query,
    'posts_per_page'          => 12,
    'orderby'                 => 'date',
    'order'                   => 'DESC',
    'lang'                    => '',
    'thalim_event_date_order' => true,
], $extra_query_args));
$context['cards'] = thalim_get_cards_data($posts);
$context['posts'] = $posts;

// Custom Pods presentation fields (not the WP built-in description)
$tax_lang    = thalim_current_language();
$pres_fr     = get_term_meta($term->term_id, 'presentation', true) ?: '';
$pres_en     = get_term_meta($term->term_id, 'presentation_en', true) ?: '';
$context['term_presentation'] = wpautop( ( $tax_lang === 'en' && $pres_en ) ? $pres_en : $pres_fr );

Timber::render('taxonomy.twig', $context);