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<?php
/* Copyright (C) 2013 Cédric Salvador <csalvador@gpcsolutions.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

/**
 *	\file       htdocs/core/class/link.class.php
 *	\ingroup    link
 *	\brief      File for link class
 */
require_once DOL_DOCUMENT_ROOT.'/core/class/commonobject.class.php';


/**
 *	Class to manage links
 */
class Link extends CommonObject
{
    /**
	 * @var string ID to identify managed object
	 */
	public $element = 'link';

    /**
	 * @var string Name of table without prefix where object is stored
	 */
	public $table_element = 'links';

    /**
	 * @var int Entity
	 */
	public $entity;

    public $datea;
    public $url;

    /**
     * @var string Links label
     */
    public $label;

    public $objecttype;
    public $objectid;


    /**
     *    Constructor
     *
     *    @param	DoliDB		$db		Database handler
     */
    public function __construct($db)
    {
        $this->db = $db;
    }


    /**
     *    Create link in database
     *
     *    @param	User	$user       Object of user that ask creation
     *    @return   int         		>= 0 if OK, < 0 if KO
     */
    public function create($user = '')
    {
        global $langs,$conf;

        $error=0;
        $langs->load("errors");
        // Clean parameters
        if (empty($this->label)) {
            $this->label = trim(basename($this->url));
        }
        if (empty($this->datea)) {
            $this->datea = dol_now();
        }
        $this->url = trim($this->url);

        dol_syslog(get_class($this)."::create ".$this->url);

        // Check parameters
        if (empty($this->url)) {
            $this->error = $langs->trans("NoUrl");
            return -1;
        }

        $this->db->begin();

        $sql = "INSERT INTO ".MAIN_DB_PREFIX."links (entity, datea, url, label, objecttype, objectid)";
        $sql .= " VALUES ('".$conf->entity."', '".$this->db->idate($this->datea)."'";
        $sql .= ", '" . $this->db->escape($this->url) . "'";
        $sql .= ", '" . $this->db->escape($this->label) . "'";
        $sql .= ", '" . $this->db->escape($this->objecttype) . "'";
        $sql .= ", " . $this->objectid . ")";

        dol_syslog(get_class($this)."::create", LOG_DEBUG);
        $result = $this->db->query($sql);
        if ($result) {
            $this->id = $this->db->last_insert_id(MAIN_DB_PREFIX . "links");

            if ($this->id > 0) {
                // Call trigger
                $result=$this->call_trigger('LINK_CREATE', $user);
                if ($result < 0) $error++;
                // End call triggers
            } else {
                $error++;
            }

            if (! $error)
            {
                dol_syslog(get_class($this)."::Create success id=" . $this->id);
                $this->db->commit();
                return $this->id;
            }
            else
            {
                dol_syslog(get_class($this)."::Create echec update " . $this->error, LOG_ERR);
                $this->db->rollback();
                return -3;
            }
        }
        else
        {
            if ($this->db->errno() == 'DB_ERROR_RECORD_ALREADY_EXISTS')
            {

                $this->error=$langs->trans("ErrorCompanyNameAlreadyExists", $this->name);
                $result=-1;
            }
            else
            {
                $this->error=$this->db->lasterror();
                $result=-2;
            }
            $this->db->rollback();
            return $result;
        }
    }

    /**
     *  Update parameters of third party
     *
     *  @param  User	$user            			User executing update
     *  @param  int		$call_trigger    			0=no, 1=yes
     *  @return int  			           			<0 if KO, >=0 if OK
     */
    public function update($user = '', $call_trigger = 1)
    {
        global $langs,$conf;
        require_once DOL_DOCUMENT_ROOT.'/core/lib/functions2.lib.php';

        $langs->load("errors");
        $error=0;

        dol_syslog(get_class($this)."::Update id = " . $this->id . " call_trigger = " . $call_trigger);

        // Check parameters
        if (empty($this->url))
        {
            $this->error = $langs->trans("NoURL");
            return -1;
        }

        // Clean parameters
        $this->url       = clean_url($this->url, 1);
        if (empty($this->label)) $this->label = basename($this->url);
        $this->label     = trim($this->label);


        $this->db->begin();

        $sql  = "UPDATE " . MAIN_DB_PREFIX . "links SET ";
        $sql .= "entity = '" . $conf->entity ."'";
        $sql .= ", datea = '" . $this->db->idate(dol_now()) . "'";
        $sql .= ", url = '" . $this->db->escape($this->url) . "'";
        $sql .= ", label = '" . $this->db->escape($this->label) . "'";
        $sql .= ", objecttype = '" . $this->db->escape($this->objecttype) . "'";
        $sql .= ", objectid = " . $this->objectid;
        $sql .= " WHERE rowid = " . $this->id;

        dol_syslog(get_class($this)."::update sql = " .$sql);
        $resql = $this->db->query($sql);
        if ($resql)
        {
            if ($call_trigger)
            {
                // Call trigger
                $result=$this->call_trigger('LINK_MODIFY', $user);
                if ($result < 0) $error++;
                // End call triggers
            }

            if (! $error)
            {
                dol_syslog(get_class($this) . "::Update success");
                $this->db->commit();
                return 1;
            } else {
                setEventMessages('', $this->errors, 'errors');
                $this->db->rollback();
                return -1;
            }
        }
        else
        {
            if ($this->db->errno() == 'DB_ERROR_RECORD_ALREADY_EXISTS')
            {
                // Doublon
                $this->error = $langs->trans("ErrorDuplicateField");
                $result =  -1;
            }
            else
            {
                $this->error = $langs->trans("Error sql = " . $sql);
                $result =  -2;
            }
            $this->db->rollback();
            return $result;
        }
    }

    /**
     *  Loads all links from database
     *
     *  @param  array   $links      array of Link objects to fill
     *  @param  string  $objecttype type of the associated object in dolibarr
     *  @param  int     $objectid   id of the associated object in dolibarr
     *  @param  string  $sortfield  field used to sort
     *  @param  string  $sortorder  sort order
     *  @return int                 1 if ok, 0 if no records, -1 if error
     **/
    public function fetchAll(&$links, $objecttype, $objectid, $sortfield = null, $sortorder = null)
    {
        global $conf;

        $sql = "SELECT rowid, entity, datea, url, label, objecttype, objectid FROM " . MAIN_DB_PREFIX . "links";
        $sql .= " WHERE objecttype = '" . $objecttype . "' AND objectid = " . $objectid;
        if ($conf->entity != 0) $sql .= " AND entity = " . $conf->entity;
        if ($sortfield) {
            if (empty($sortorder)) {
                $sortorder = "ASC";
            }
            $sql .= " ORDER BY " . $sortfield . " " . $sortorder;
        }

        dol_syslog(get_class($this)."::fetchAll", LOG_DEBUG);
        $resql = $this->db->query($sql);
        if ($resql)
        {
            $num = $this->db->num_rows($resql);
            dol_syslog(get_class($this)."::fetchAll " . $num . "records", LOG_DEBUG);
            if ($num > 0)
            {
                while ($obj = $this->db->fetch_object($resql))
                {
                    $link = new Link($this->db);
                    $link->id = $obj->rowid;
                    $link->entity = $obj->entity;
                    $link->datea = $this->db->jdate($obj->datea);
                    $link->url = $obj->url;
                    $link->label = $obj->label;
                    $link->objecttype = $obj->objecttype;
                    $link->objectid = $obj->objectid;
                    $links[] = $link;
                }
                return 1;
            } else {
                return 0;
            }
        } else {
            return -1;
        }
    }

    /**
     *  Return nb of links
     *
     *  @param  DoliDb  $db         Database handler
     *  @param  string  $objecttype Type of the associated object in dolibarr
     *  @param  int     $objectid   Id of the associated object in dolibarr
     *  @return int                 Nb of links, -1 if error
     **/
    public static function count($db, $objecttype, $objectid)
    {
        global $conf;

        $sql = "SELECT COUNT(rowid) as nb FROM " . MAIN_DB_PREFIX . "links";
        $sql .= " WHERE objecttype = '" . $objecttype . "' AND objectid = " . $objectid;
        if ($conf->entity != 0) $sql .= " AND entity = " . $conf->entity;

        $resql = $db->query($sql);
        if ($resql)
        {
            $obj = $db->fetch_object($resql);
            if ($obj) return $obj->nb;
        }
        return -1;
    }

    /**
     *  Loads a link from database
     *
     *  @param 	int		$rowid 		Id of link to load
     *  @return int 				1 if ok, 0 if no record found, -1 if error
     **/
    public function fetch($rowid = null)
    {
        global $conf;

        if (empty($rowid)) {
            $rowid = $this->id;
        }

        $sql = "SELECT rowid, entity, datea, url, label, objecttype, objectid FROM " . MAIN_DB_PREFIX . "links";
        $sql .= " WHERE rowid = " . $rowid;
        if($conf->entity != 0) $sql .= " AND entity = " . $conf->entity;

        dol_syslog(get_class($this)."::fetch", LOG_DEBUG);
        $resql = $this->db->query($sql);
        if ($resql)
        {
            if($this->db->num_rows($resql) > 0)
            {
                $obj = $this->db->fetch_object($resql);
                $this->id = $obj->rowid;
                $this->entity = $obj->entity;
                $this->datea = $this->db->jdate($obj->datea);
                $this->url = $obj->url;
                $this->label = $obj->label;
                $this->objecttype = $obj->objecttype;
                $this->objectid = $obj->objectid;
                return 1;
            }
            else
			{
                return 0;
            }
        } else {
            $this->error=$this->db->lasterror();
            return -1;
        }
    }

    /**
     *    Delete a link from database
     *
     *    @return	int				<0 if KO, 0 if nothing done, >0 if OK
     */
    public function delete()
    {
        global $user;

        dol_syslog(get_class($this)."::delete", LOG_DEBUG);
        $error = 0;

        // Call trigger
        $result=$this->call_trigger('LINK_DELETE', $user);
        if ($result < 0) return -1;
        // End call triggers

        $this->db->begin();

        // Remove link
        $sql = "DELETE FROM " . MAIN_DB_PREFIX . "links";
        $sql.= " WHERE rowid = " . $this->id;

        dol_syslog(get_class($this)."::delete", LOG_DEBUG);
        if (! $this->db->query($sql))
        {
            $error++;
            $this->error = $this->db->lasterror();
        }

        if (! $error) {
            $this->db->commit();

            return 1;
        } else {
            $this->db->rollback();
            return -1;
        }
    }
}