Overriding content with search post

I filter custom posts by a custom fields and i would like replace the default post content with the search result.

class CustomSearch {

    public function init() {
        add_action( 'init', array( $this, 'get_search_context' ) );
    }

    public function get_search_context( $context ) {
        if ( !isset( $_POST['searchfilter'] ) ) {
            $_POST['searchfilter'] = null;
        }
        $args = array(
            'post_type'   => 'custom_posts',
            'post_status' => 'publish',
            's'           => $_POST['searchfilter'],
            'meta_query'  => array(
                array(
                    'value'   => $_POST['search_category'],
                    'compare' => 'AND',
                ),
            ),
        );

        // this result should override the default post content
        $context['posts'] = Timber::get_posts( $args );
    }
}

Theme index.php

$context = Timber::get_context();

if ( is_singular() ) {
    $context['post'] = Timber::get_post();
} else {
    $context['posts'] = Timber::get_posts();
}

.
.
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