<?php
# -- BEGIN LICENSE BLOCK ----------------------------------
#
# This file is part of cinecturlink2, a plugin for Dotclear 2.
# 
# Copyright (c) 2009-2013 Jean-Christian Denis and contributors
# contact@jcdenis.fr http://jcd.lv
# 
# Licensed under the GPL version 2.0 license.
# A copy of this license is available in LICENSE file or at
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
#
# -- END LICENSE BLOCK ------------------------------------

class cinecturlink2Context
{
	public static function PaginationNbPages()
	{
		global $_ctx;

		if ($_ctx->c2_pagination === null) {

			return false;
		}

		$nb_posts = $_ctx->c2_pagination->f(0);
		$nb_per_page = $_ctx->c2_params['limit'][1];

		$nb_pages = ceil($nb_posts/$nb_per_page);

		return $nb_pages;
	}

	public static function PaginationPosition($offset=0)
	{
		if (isset($GLOBALS['c2_page_number'])) {
			$p = $GLOBALS['c2_page_number'];
		}
		else {
			$p = 1;
		}

		$p = $p+$offset;

		$n = self::PaginationNbPages();
		if (!$n) {

			return $p;
		}

		return $p > $n || $p <= 0 ? 1 : $p;
	}

	public static function PaginationStart()
	{
		if (isset($GLOBALS['c2_page_number'])) {

			return self::PaginationPosition() == 1;
		}

		return true;
	}
	
	public static function PaginationEnd()
	{	
		if (isset($GLOBALS['c2_page_number'])) {

			return self::PaginationPosition() == self::PaginationNbPages();
		}

		return false;
	}
	
	public static function PaginationURL($offset=0)
	{
		$args = $_SERVER['URL_REQUEST_PART'];

		$n = self::PaginationPosition($offset);

		$args = preg_replace('#(^|/)c2page/([0-9]+)$#', '', $args);

		$url = $GLOBALS['core']->blog->url.$args;

		if ($n > 1) {
			$url = preg_replace('#/$#','',$url);
			$url .= '/c2page/'.$n;
		}

		# If search param
		if (!empty($_GET['q'])) {
			$s = strpos($url,'?') !== false ? '&amp;' : '?';
			$url .= $s.'q='.rawurlencode($_GET['q']);
		}

		return $url;
	}

	public static function categoryCurrent()
	{
		global $_ctx;

		if (!isset($_ctx->c2_page_params['cat_id']) && !isset($_ctx->c2_page_params['cat_title'])) {

			return false;
		}
		if (isset($_ctx->c2_page_params['cat_id']) && $_ctx->c2_page_params['cat_id'] == $_ctx->c2_categories->cat_id) {

			return true;
		}
		if (isset($_ctx->c2_page_params['cat_title']) && $_ctx->c2_page_params['cat_title'] == $_ctx->c2_categories->cat_title) {

			return true;
		}

		return false;
	}
}