<?php
/**
 * Project:
 * Contenido Content Management System
 *
 * Description:
 * Contenido Article Object and Collection
 *
 *
 *
 * @package    Contenido_API
 * @version    $Id$:
 * @author     Ortwin Pinke
 * @author     Jan Lengowski
 * @copyright  four for business AG <www.4fb.de>
 * @license    http://www.contenido.org/license/LIZENZ.txt
 * @link       http://www.4fb.de
 * @link       http://www.contenido.org
 * @since      file available since contenido release <= 4.6
 *
 */

if (!defined('CON_FRAMEWORK')) {
    die('Illegal call');
}

/**
 * Contenido API - Article Object
 *
 * This object represents a Contenido article
 *
 * Create object with
 * $obj = new Article(idart, client, lang [, idartlang]);
 *
 * You can now read the article properties with
 * $obj->getField(property);
 *
 * List of article properties:
 *
 * idartlang         - Language dependant article id
 * idart             - Language indepenant article id
 * idclient          - Id of the client
 * idtplcfg          - Template configuration id
 * title             - Internal Title
 * pagetitle         - HTML Title
 * summary           - Article summary
 * created           - Date created
 * lastmodified      - Date lastmodiefied
 * author            - Article author (username)
 * online            - On-/offline
 * redirect          - Redirect
 * redirect_url      - Redirect URL
 * artsort           - Article sort key
 * timemgmt          - Time management
 * datestart         - Time management start date
 * dateend           - Time management end date
 * status            - Article status
 * free_use_01       - Free to use
 * free_use_02       - Free to use
 * free_use_03       - Free to use
 * time_move_cat     - Move category after time management
 * time_target_cat   - Move category to this cat after time management
 * time_online_move  - Set article online after move
 * external_redirect - Open article in new window
 * locked            - Article is locked for editing
 *
 * You can extract article content with the
 * $obj->getContent(contype [, number]) method.
 *
 * To extract the first headline you can use:
 *
 * $headline = $obj->getContent("htmlhead", 1);
 *
 * If the second parameter is ommitted the method
 * returns an array with all available content of
 * this type. The array has the following schema:
 *
 * array( number => content );
 *
 * $headlines = $obj->getContent("htmlhead");
 *
 * $headlines[1] First headline
 * $headlines[2] Second headline
 * $headlines[6] Sixth headline
 *
 * Legal content type string are defined in the Contenido
 * system table 'con_type'. Default content types are:
 *
 * NOTE: This parameter is case insesitive, you can use
 * html or cms_HTML or CmS_HtMl. Your don't need start with
 * cms, but it won't crash if you do so.
 *
 * htmlhead     - HTML Headline
 * html         - HTML Text
 * headline     - Headline (no HTML)
 * text         - Text (no HTML)
 * img          - Upload id of the element
 * imgdescr     - Image description
 * link         - Link (URL)
 * linktarget   - Linktarget (_self, _blank, _top ...)
 * linkdescr    - Linkdescription
 * swf          - Upload id of the element
 *
 */
class Article extends Item
{
    /**
     * Config array
     * @var array
     */
    public $tab;

    /**
     * Article content
     * @var array
     */
    public $content;
    
    /**
     * holds idartlang of article
     * 
     * @var int
     */
    protected $_iIdArtLang;

    /**
     * Constructor
     *
     * @param int $idart Article Id
     * @param int $lang Language Id
     *
     * @return void
     */
    public function __construct($idart, $client, $lang, $idartlang = 0) {
        global $cfg;

        $this->tab = $cfg['tab'];

        parent::__construct($this->tab['art_lang'], 'idartlang');

        $idartlang = Contenido_Security::toInteger($idartlang);
        $this->_iIdArtLang = ($idartlang == 0) ? $this->_getIdArtLang($idart, $lang) : $idartlang;

        $this->loadByPrimaryKey($this->_iIdArtLang);
        $this->_getArticleContent();
    }
    
    /**
     * Getter for idartlang of article object
     * 
     * @author  Ortwin Pinke
     * @since   ConLite 0.1.0
     * 
     * @return int idartlang 
     */
    public function getIdArtLang() {
        if(!empty($this->_iIdArtLang) && is_integer($this->_iIdArtLang)) {
            return $this->_iIdArtLang;
        } else {
            return false;
        }
    }

    /**
     * Extract 'idartlang' for a specified 'idart' and 'lang'
     *
     * @param int Article id
     * @param int Language id
     *
     * @access private
     * @return int Language dependant article id
     */
    protected function _getIdArtLang($idart, $lang)
    {
        $idart = Contenido_Security::toInteger($idart);
        $lang  = Contenido_Security::toInteger($lang);

        $sql = 'SELECT idartlang FROM '.$this->tab['art_lang'].' WHERE idart="'.$idart.'" AND idlang="'.$lang.'"';

        $this->db->query($sql);
        $this->db->next_record();

        return $this->db->f('idartlang');
    }

    /**
     * Load the articles content and stores it in the 'content' property of the
     * article object
     *
     * $article->content[type][number] = value;
     *
     * @param none
     * @return void
     */
    protected function _getArticleContent()
    {
        $sql = 'SELECT
                    b.type, a.typeid, a.value
                FROM
                    '.$this->tab['content'].' AS a,
                    '.$this->tab['type'].' AS b
                WHERE
                    a.idartlang = "'.$this->get('idartlang').'" AND
                    b.idtype = a.idtype
                ORDER BY
                    a.idtype, a.typeid';

        $this->db->query($sql);

        while ($this->db->next_record()) {
            $this->content[strtolower($this->db->f('type'))][$this->db->f('typeid')] = urldecode($this->db->f('value'));
        }
    }

    /**
     * Get the value of an article property
     *
     * List of article properties:
     *
     * idartlang         - Language dependant article id
     * idart             - Language indepenant article id
     * idclient          - Id of the client
     * idtplcfg          - Template configuration id
     * title             - Internal Title
     * pagetitle         - HTML Title
     * summary           - Article summary
     * created           - Date created
     * lastmodified      - Date lastmodiefied
     * author            - Article author (username)
     * online            - On-/offline
     * redirect          - Redirect
     * redirect_url      - Redirect URL
     * artsort           - Article sort key
     * timemgmt          - Time management
     * datestart         - Time management start date
     * dateend           - Time management end date
     * status            - Article status
     * free_use_01       - Free to use
     * free_use_02       - Free to use
     * free_use_03       - Free to use
     * time_move_cat     - Move category after time management
     * time_target_cat   - Move category to this cat after time management
     * time_online_move  - Set article online after move
     * external_redirect - Open article in new window
     * locked            - Article is locked for editing
     *
     * @param string Property name
     * @return mixed Property value
     */
    public function getField($name)
    {
        return urldecode($this->values[$name]);
    }

    /**
     * Get content(s) from an article
     *
     * Returns the specified content element or an array("id"=>"value")
     * if the second parameter is omitted.
     *
     * Legal content type string are defined in the Contenido
     * system table 'con_type'. Default content types are:
     *
     * NOTE: Parameter is case insesitive, you can use
     * html or cms_HTML or CmS_HtMl. Your don't need start with
     * cms, but it won't crash if you do so.
     *
     * htmlhead     - HTML Headline
     * html         - HTML Text
     * headline     - Headline (no HTML)
     * text         - Text (no HTML)
     * img          - Upload id of the element
     * imgdescr     - Image description
     * link         - Link (URL)
     * linktarget   - Linktarget (_self, _blank, _top ...)
     * linkdescr    - Linkdescription
     * swf          - Upload id of the element
     *
     * @param string CMS_TYPE - Legal cms type string
     * @param int Id of the content
     *
     * @return mixed String/Array Content Data
     */
    public function getContent($type, $id = NULL)
    {
        if ($type == '') {
            return 'Class ' . get_class($this) . ': content-type must be specified!';
        }

        $type = strtolower($type);

        if (!strstr($type, 'cms_')) {
            $type = 'cms_' . $type;
        }

        if (is_null($id)) {
            // return Array
            return $this->content[$type];
        }

        // return String
        return $this->content[$type][$id];
    }

    /**
     * Store -DISABLED-
     *
     * This Article Object is READ ONLY
     *
     * @param none
     * @access private
     * @return none
     */
    public function store()
    {
        return false;
    }
}


/**
 * Contenido API - Article Object Collection
 *
 * This class is used to manage multiple Contenido
 * article objects in a collection.
 *
 * The constructor awaits an associative array
 * as parameter with the following schema:
 *
 * array( string paramname => mixed value );
 *
 * The parameter idcat is required: array('idcat'=>n)
 *
 * Legal parameter names are:
 *
 *  idcat     - Contenido Category Id
 *  lang      - Language Id, active language if ommited
 *  client    - Client Id, active client if ommited
 *  start     - include start article in the collection, defaults to false
 *  artspecs  - Array of article specifications, which should be considered
 *  order     - articles will be orderered by this article property, defaults to 'created'
 *  direction - Order direcion, 'asc' or 'desc' for ascending/descending, defaults to 'asc'
 *  limit     - Limit numbers of articles in collection
 *
 * You can easy create article lists/teasers with this class.
 *
 * To create an article list of category 4 (maybe a news category) use:
 *
 * $myList = new ArticleCollection(array("idcat"=>4);
 *
 * while ($article = $myList->nextArticle())
 * {
 *     // Fetch the first headline
 *     $headline = $article->getContent('htmlhead', 1);
 *     $idart    = $article->getField('idart');
 *
 *     // Create a link
 *     echo '<a href="front_content.php?idcat='.$myList->idcat.'&idart='.$idart.'">'.$headline.'</a><br/>';
 * }
 *
 * @package Contenido API
 * @version 1.0
 *
 * @author Jan Lengowski <Jan.Lengowski@4fb.de>
 * @copyright four for business AG <www.4fb.de>
 */
class ArticleCollection
{
    /**
     * Database Object
     * @var object
     */
    public $db;

    /**
     * Result Counter
     * @var int
     */
    public $cnt = 0;

    /**
     * Language id
     * @var int
     */
    public $lang;

    /**
     * Client ID
     * @var int
     */
    public $client;

    /**
     * Config array
     * @var array
     */
    public $tab;

    /**
     * Articles
     * @var array
     */
    public $articles = array();

    /**
     * Article Specifications
     * @var array
     */
    public $artspecs;

    /**
     * Include the Start-Article
     * @var int
     */
    public $start;

    /**
     * Id of the start article
     * @var int
     */
    public $startId;

    /**
     * Sort order
     * @var string
     */
    public $order;

    /**
     * Sort direction
     * @var string
     */
    public $direction;

    /**
     * Limit of numbers of articles in collection
     * @var int
     */
    public $limit;

    /**
     * Articles in collection
     * @var int
     */
    public $count;

    /**
     * Pages in Article Collection
     * @var int
     */
    public $iCountPages;

    /**
     * Results per page
     * @var int
     */
    public $iResultPerPage;

    /**
     * List of articles, splitted into pages
     * @var array
     */
    public $aPages;

    /**
     * Article Collection Constructor
     *
     * @param array Options array with schema array("option"=>"value");
     *  idcat (required) - Contenido Category Id
     *  lang - Language Id, active language if ommited
     *  client - Client Id, active client if ommited
     *  artspecs  - Array of article specifications, which should be considered
     *  start - include start article in the collection, defaults to false
     *  order - articles will be orderered by this property, defaults to 'created'
     *  direction - Order direcion, 'asc' or 'desc' for ascending/descending
     *  limit - Limit numbers of articles in collection
     *
     * @return void
     */
    public function __construct($options)
    {
        global $cfg;

        $this->tab = $cfg['tab'];
        $this->db = new DB_ConLite();

        if (!is_numeric($options["idcat"])) {
            return 'idcat has to be defined';
        }

        $this->_setObjectProperties($options);
        $this->_getArticlesByCatId($this->idcat);
    }

    /**
     * Set the Object properties
     *
     * @param array Options array with schema array("option"=>"value");
     *  idcat (required) - Contenido Category Id
     *  lang - Language Id, active language if ommited
     *  client - Client Id, active client if ommited
     *  artspecs  - Array of article specifications, which should be considered
     *  start - include start article in the collection, defaults to false
     *  order - articles will be ordered by this property, defaults to 'created'
     *  direction - Order direcion, 'ASC' or 'DESC' for ascending/descending
     *  limit - Limit numbers of articles in collection
     *
     * @access private
     * @return void
     */
    private function _setObjectProperties($options)
    {
        global $client, $lang;

        $lang     = Contenido_Security::toInteger($lang);
        $client = Contenido_Security::toInteger($client);

        $this->idcat     = $options['idcat'];
        $this->lang      = (array_key_exists('lang',   $options))    ? $options['lang']      : $lang;
        $this->client    = (array_key_exists('client', $options))    ? $options['client']    : $client;
        $this->start     = (array_key_exists('start',  $options))    ? $options['start']     : false;
        $this->offline   = (array_key_exists('offline',$options))    ? $options['offline']   : false;
        $this->order     = (array_key_exists('order',  $options))    ? $options['order']     : 'created';
        $this->artspecs  = (array_key_exists('artspecs', $options) AND is_array($options['artspecs']))  ? $options['artspecs']  : array();
        $this->direction = (array_key_exists('direction', $options)) ? $options['direction'] : 'DESC';
        $this->limit = (array_key_exists('limit', $options)  AND is_numeric($options['limit'])) ? $options['limit'] : 0;
    }

    /**
     * Extracts all articles from a specified category id and stores them in the
     * internal article array
     *
     * @param int Category Id
     *
     * @access private
     * @return void
     */
    private function _getArticlesByCatId($idcat)
    {
        global $cfg;

        $idcat = Contenido_Security::toInteger($idcat);

        $sArtSpecs = (count($this->artspecs) > 0) ? " a.artspec IN ('".implode("','", $this->artspecs)."') AND " : '';

        if ($cfg["is_start_compatible"] == true) {
            $sql = 'SELECT
                        a.idart,
                        c.is_start
                    FROM
                        '.$this->tab['art_lang'].' AS a,
                        '.$this->tab['art'].' AS b,
                        '.$this->tab['cat_art'].' AS c
                    WHERE
                        c.idcat = '.$idcat.' AND
                        b.idclient = '.$this->client.' AND
                        b.idart = c.idart AND
                        a.idart = b.idart AND
                        '.$sArtSpecs.'
                        a.idlang = '.$this->lang.'';
        } else {

            $sql = 'SELECT
                    a.idart,
                    a.idartlang,
                    c.is_start
                FROM
                    '.$this->tab['art_lang'].' AS a,
                    '.$this->tab['art'].' AS b,
                    '.$this->tab['cat_art'].' AS c
                WHERE
                    c.idcat = '.$idcat.' AND
                    b.idclient = '.$this->client.' AND
                    b.idart = c.idart AND
                    a.idart = b.idart AND
                    '.$sArtSpecs.'
                    a.idlang = '.$this->lang.'';
        }

        if (!$this->offline) {
            $sql .= ' AND a.online = 1 ';
        }

        $sql .= ' ORDER BY a.'.$this->order.' '.$this->direction.'';

        $this->db->query($sql);

        if ($cfg["is_start_compatible"] == false) {
            $db2 = new DB_ConLite();
            $sql = "SELECT startidartlang FROM ".$cfg["tab"]["cat_lang"]." WHERE idcat='".$idcat."' AND idlang='".$this->lang."'";
            $db2->query($sql);
            $db2->next_record();

            $startidartlang = $db2->f("startidartlang");

            if ($startidartlang != 0) {
                $sql = "SELECT idart FROM ".$cfg["tab"]["art_lang"]." WHERE idartlang='".$startidartlang."'";
                $db2->query($sql);
                $db2->next_record();
                $this->startId = $db2->f("idart");
            }
        }

        while ($this->db->next_record()) {
            if ($cfg["is_start_compatible"] == true) {
                if ($this->db->f('is_start') == 1) {
                    $this->startId = $this->db->f('idart');

                    if ($this->start) {
                        $this->articles[] = $this->db->f('idart');
                    }
                } else {
                    $this->articles[] = $this->db->f('idart');
                }
            } else {
                if ($this->db->f("idart") == $this->startId) {
                    if ($this->start) {
                        $this->articles[] = $this->db->f('idart');
                    }
                } else {
                    $this->articles[] = $this->db->f('idart');
                }
            }
        }

        $this->count = count($this->articles);
    }

    /**
     * Iterate to the next article, return object of type Contenido Article Object
     * if an article is found. False otherwise.
     *
     * @param none
     *
     * @return object Contenido Article Object
     */
    public function nextArticle()
    {
        $limit = true;
        if ($this->limit > 0) {
            if ($this->cnt >= $this->limit)
            $limit = false;
        }
        if ($this->cnt < count($this->articles) AND $limit) {
            $idart = $this->articles[$this->cnt];

            if (is_numeric($idart)) {
                $this->cnt ++;
                return new Article($idart, $this->client, $this->lang);
            }
        }
        return false;
    }

    /**
     * Return ONLY the Start-Article
     *
     * @param none
     * @return object Contenido Article Object
     * @access public
     */
    public function startArticle()
    {
        return new Article($this->startId, $this->client, $this->lang);
    }

    /**
     * Split the article results into pages of a given size.
     *
     * Example:
     * Article Collection with 5 articles
     *
     *   [0] => 250
     *   [1] => 251
     *   [2] => 253
     *   [3] => 254
     *   [4] => 255
     *
     * $collection->setResultPerPage(2)
     *
     * Would split the results into 3 pages
     *
     * [0] => [0] => 250
     *        [1] => 251
     * [1] => [0] => 253
     *        [1] => 254
     * [2] => [0] => 255
     *
     * A page can be selected with
     *
     * $collection->setPage(int page)
     *
     * @param int $resPerPage
     * @return void
     * @access public
     */
    public function setResultPerPage($resPerPage)
    {
        $this->iResultPerPage = $resPerPage;

        if ($this->iResultPerPage > 0) {
            if (is_array($this->articles)) {
                 $this->aPages = array_chunk($this->articles, $this->iResultPerPage);
                 $this->iCountPages = count($this->aPages);
            } else {
                $this->aPages = array();
                $this->iCountPages = 0;
            }
        }
    }

    /**
     * Select a page if the results was divided before.
     *
     * $collection->setResultsPerPage(2);
     * $collection->setPage(1);
     *
     * // Iterate through all articles of page two
     * while ($art = $collection->nextArticle())
     * { ... }
     *
     * @param int $iPage The page of the article collection
     * @return void
     * @access public
     */
    public function setPage($iPage)
    {
        if (is_array($this->aPages[$iPage])) {
            $this->articles = $this->aPages[$iPage];
        }
    }
}

?>