<?php
// Class file for a Shared Note (NOTE) object
//
// webtrees: Web based Family History software
// Copyright (C) 2014 webtrees development team.
//
// Derived from PhpGedView
// Copyright (C) 2009 PGV Development Team.  All rights reserved.
//
// 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 2 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, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

class WT_Note extends WT_GedcomRecord {
	const RECORD_TYPE = 'NOTE';
	const SQL_FETCH   = "SELECT o_gedcom FROM `##other` WHERE o_id=? AND o_file=?";
	const URL_PREFIX  = 'note.php?nid=';

	// Get the text contents of the note
	public function getNote() {
		if (preg_match('/^0 @' . WT_REGEX_TAG . '@ NOTE ?(.*(?:\n1 CONT ?.*)*)/', $this->gedcom.$this->pending, $match)) {
			return preg_replace("/\n1 CONT ?/", "\n", $match[1]);
		} else {
			return null;
		}
	}

	// Implement note-specific privacy logic
	protected function _canShowByType($access_level) {
		// Hide notes if they are attached to private records
		$linked_ids=WT_DB::prepare(
			"SELECT l_from FROM `##link` WHERE l_to=? AND l_file=?"
		)->execute(array($this->xref, $this->gedcom_id))->fetchOneColumn();
		foreach ($linked_ids as $linked_id) {
			$linked_record=WT_GedcomRecord::getInstance($linked_id);
			if ($linked_record && !$linked_record->canShow($access_level)) {
				return false;
			}
		}

		// Apply default behaviour
		return parent::_canShowByType($access_level);
	}

	// Generate a private version of this record
	protected function createPrivateGedcomRecord($access_level) {
		return '0 @' . $this->xref . '@ NOTE ' . WT_I18N::translate('Private');
	}

	// Fetch the record from the database
	protected static function fetchGedcomRecord($xref, $gedcom_id) {
		static $statement=null;

		if ($statement===null) {
			$statement=WT_DB::prepare("SELECT o_gedcom FROM `##other` WHERE o_id=? AND o_file=? AND o_type='NOTE'");
		}

		return $statement->execute(array($xref, $gedcom_id))->fetchOne();
	}

	// Get an array of structures containing all the names in the record
	public function extractNames() {
		// Uniquely, the NOTE objects have data in their level 0 record.
		if (preg_match('/^0 @' . WT_REGEX_XREF . '@ NOTE (.+)/', $this->getGedcom(), $match)) {
			// The 'name' of a note record is the first line.  This can be
			// somewhat unwieldy if lots of CONC records are used.  Limit to 100 chars
			if (utf8_strlen($match[1])<100) {
				$this->_addName('NOTE', $match[1], $this->getGedcom());
			} else {
				$this->_addName('NOTE', utf8_substr($match[1], 0, 100).WT_I18N::translate('…'), $this->getGedcom());
			}
		}
	}
}
