bp_nouveau_ajax_new_activity_comment()

function bp_nouveau_ajax_new_activity_comment() {
	global $activities_template;
	$bp = buddypress();

	$response = array(
		'feedback' => sprintf(
			'<div class="bp-feedback bp-messages error">%s</div>',
			esc_html__( 'There was an error posting your reply. Please try again.', 'buddyboss' )
		),
	);

	// Bail if not a POST action.
	if ( ! bp_is_post_request() ) {
		wp_send_json_error( $response );
	}

	// Nonce check!
	if ( empty( $_POST['_wpnonce_new_activity_comment'] ) || ! wp_verify_nonce( $_POST['_wpnonce_new_activity_comment'], 'new_activity_comment' ) ) {
		wp_send_json_error( $response );
	}

	if ( ! is_user_logged_in() ) {
		wp_send_json_error( $response );
	}

	if ( empty( $_POST['content'] ) ) {
		wp_send_json_error( array( 'feedback' => sprintf(
			'<div class="bp-feedback bp-messages error">%s</div>',
			esc_html__( 'Please do not leave the comment area blank.', 'buddyboss' )
		) ) );
	}

	if ( empty( $_POST['form_id'] ) || empty( $_POST['comment_id'] ) || ! is_numeric( $_POST['form_id'] ) || ! is_numeric( $_POST['comment_id'] ) ) {
		wp_send_json_error( $response );
	}

	$comment_id = bp_activity_new_comment( array(
		'activity_id' => $_POST['form_id'],
		'content'     => $_POST['content'],
		'parent_id'   => $_POST['comment_id'],
	) );

	if ( ! $comment_id ) {
		if ( ! empty( $bp->activity->errors['new_comment'] ) && is_wp_error( $bp->activity->errors['new_comment'] ) ) {
			$response = array( 'feedback' => sprintf(
				'<div class="bp-feedback bp-messages error">%s</div>',
				esc_html( $bp->activity->errors['new_comment']->get_error_message() )
			) );
			unset( $bp->activity->errors['new_comment'] );
		}

		wp_send_json_error( $response );
	}

	// Load the new activity item into the $activities_template global.
	bp_has_activities(
		array(
			'display_comments' => 'stream',
			'hide_spam'        => false,
			'show_hidden'      => true,
			'include'          => $comment_id,
		)
	);

	// Swap the current comment with the activity item we just loaded.
	if ( isset( $activities_template->activities[0] ) ) {
		$activities_template->activity                  = new stdClass();
		$activities_template->activity->id              = $activities_template->activities[0]->item_id;
		$activities_template->activity->current_comment = $activities_template->activities[0];

		// Because the whole tree has not been loaded, we manually
		// determine depth.
		$depth     = 1;
		$parent_id = (int) $activities_template->activities[0]->secondary_item_id;
		while ( $parent_id !== (int) $activities_template->activities[0]->item_id ) {
			$depth++;
			$p_obj     = new BP_Activity_Activity( $parent_id );
			$parent_id = (int) $p_obj->secondary_item_id;
		}
		$activities_template->activity->current_comment->depth = $depth;
	}

	ob_start();
	// Get activity comment template part.
	bp_get_template_part( 'activity/comment' );
	$response = array( 'contents' => ob_get_contents() );
	ob_end_clean();

	unset( $activities_template );

	wp_send_json_success( $response );
}