<?php

	/**
	 * Porcesses sections information from configs
	 *
	 */
	class kSectionsHelper extends kHelper {

		/**
		 * Holds information about all sections
		 *
		 * @var Array
		 */
		var $Tree = Array();

		/**
		 * Set's prefix and special
		 *
		 * @param string $prefix
		 * @param string $special
		 * @access public
		 */
		function Init($prefix, $special, $event_params = null)
		{
			parent::Init($prefix, $special, $event_params);
			$this->BuildTree();
		}

		/**
		 * Builds xml for tree in left frame in admin
		 *
		 * @param Array $params
		 */
		function BuildTree()
		{
			if (!isset($this->Application->Memcached) || !($data = $this->Application->Memcached->get('master:sections_parsed'))) {
				$data = $this->Conn->GetOne('SELECT Data FROM '.TABLE_PREFIX.'Cache WHERE VarName = "sections_parsed"');	
			}
			if ($data) {
				$this->Tree = unserialize($data);
				return ;
			}

			$this->Application->UnitConfigReader->ReReadConfigs();

			$this->Tree = Array();

			// 1. build base tree (don't update parent with children list yet)
			$prefixes = array_keys($this->Application->UnitConfigReader->configData);
			foreach ($prefixes as $prefix) {
				$config =& $this->Application->UnitConfigReader->configData[$prefix];
				$sections = getArrayValue($config, 'Sections');
				if (!$sections) continue;

//				echo 'Prefix: ['.$prefix.'] has ['.count($sections).'] sections<br />';

				foreach ($sections as $section_name => $section_params) {
					// we could also skip not allowed sections here in future
					if ( isset($section_params['SectionPrefix']) ) {
						$section_prefix = $section_params['SectionPrefix'];
					}
					elseif ( $this->Application->getUnitOption($prefix, 'SectionPrefix') ) {
						$section_prefix = $this->Application->getUnitOption($prefix, 'SectionPrefix');
					}
					else {
						$section_prefix = $prefix;
					}
					$section_params['SectionPrefix'] = $section_prefix;
					$section_params['url']['m_opener'] = 'r';
					$section_params['url']['no_pass_through'] = 1;
					$pass_section = getArrayValue($section_params, 'url', 'pass_section');

					if ($pass_section) {
						unset($section_params['url']['pass_section']);
						$section_params['url']['section'] = $section_name;
						if (!isset($section_params['url']['module'])) {
							$module_name = $this->Application->findModule('Path', $config['ModuleFolder'].'/', 'Name');
							$section_params['url']['module'] = $module_name;
						}
					}

					if (!isset($section_params['url']['t'])) {
						$section_params['url']['t'] = 'index';
					}

					if (!isset($section_params['onclick'])) {
						$section_params['onclick'] = 'checkEditMode()';
					}

					if (!isset($section_params['container'])) {
						$section_params['container'] = 0; // for js tree printing to xml
					}

					$current_data = isset($this->Tree[$section_name]) ? $this->Tree[$section_name] : Array();
					$this->Tree[$section_name] = array_merge_recursive2($current_data, $section_params);
				}
			}

			// 2. apply section ajustments
			foreach ($prefixes as $prefix) {
				$config =& $this->Application->UnitConfigReader->configData[$prefix];
				$section_ajustments = getArrayValue($config, 'SectionAdjustments');
				if (!$section_ajustments) continue;

				foreach ($section_ajustments as $section_name => $ajustment_params) {
					if (is_array($ajustment_params)) {
						$this->Tree[$section_name] = array_merge_recursive2($this->Tree[$section_name], $ajustment_params);
					}
					else {
						// then remove section
						unset($this->Tree[$section_name]);
					}
				}
			}

			// 3.
			foreach ($this->Tree as $section_name => $section_params) {
				// 3.1. update parent -> children references
				$this->Tree[ $section_params['parent'] ]['children'][ "{$section_params['priority']}" ] = $section_name;

				if ($section_params['type'] == stTAB) {
					// if this is tab, then mark parent section as TabOnly
					$this->Tree[ $section_params['parent'] ]['tabs_only'] = true;
				}

				// 3.2. process icons here, because they also can be ajusted
				if (isset($section_params['icon']) && preg_match('/([^:]+):(.*)/', $section_params['icon'], $regs)) {
					$this->Tree[$section_name]['icon'] = $regs[2];
					$this->Tree[$section_name]['icon_module'] = $regs[1];
					$module_folder = trim( $this->Application->findModule('Name', $regs[1], 'Path'), '/');
					if ($module_folder == '') $module_folder = 'core';
				}
				else {
					$module_folder = $this->Application->getUnitOption($section_params['SectionPrefix'], 'ModuleFolder');
				}

				// this is to display HELP icon instead of missing one.. can be replaced with some other icon to draw attention
				$icon_file = $module_folder.'/admin_templates/img/icons/icon24_'.$this->Tree[$section_name]['icon'];
				if (!file_exists(FULL_PATH.'/'.$icon_file.'.gif')) {
					$this->Tree[$section_name]['icon'] = 'help';
					$this->Tree[$section_name]['icon_module'] = 'core';
				}
			}
			$this->Application->HandleEvent( new kEvent('adm:OnAfterBuildTree') );

			if (isset($this->Application->Memcached)) {
				$this->Application->Memcached->set('master:sections_parsed',serialize($this->Tree), 0, 0);
				return;
			}
			
			$this->Conn->Query('REPLACE '.TABLE_PREFIX.'Cache (VarName, Data, Cached) VALUES ("sections_parsed", '.$this->Conn->qstr(serialize($this->Tree)).', '.adodb_mktime().')');
		}

		/**
		 * Returns details information about section
		 *
		 * @param string $section_name
		 * @return Array
		 */
		function &getSectionData($section_name)
		{
			if (isset($this->Tree[$section_name])) {
				$ret =& $this->Tree[$section_name];
			}
			else {
				$ret = Array();
			}
			return $ret;
		}

		/**
		 * Returns first child, that is not a folder
		 *
		 * @param string $section_name
		 * @param Array $tree
		 * @return stirng
		 */
		function getFirstChild($section_name, $check_permission = false)
		{
			$section_data =& $this->getSectionData($section_name);

			$children = isset($section_data['children']) && $section_data['children'] ? $section_data['children'] : false;
			if ($children) {
				// get 1st child
				ksort($children, SORT_NUMERIC);
				foreach ($children as $child_priority => $child_section) {
					$section_data =& $this->getSectionData($child_section);

					$perm_section = $this->getPermSection($child_section);
					$perm_status = $check_permission ? $this->Application->CheckPermission($perm_section.'.view') : true;
					if ((isset($section_data['show_mode']) && $section_data['show_mode']) || !$perm_status) {
						continue;
					}

					break;
				}

				return $this->getFirstChild($child_section, $check_permission);
			}

			return $section_name;
		}

		/**
		 * Returns section for permission checking based on given section
		 *
		 * @param string $section_name
		 * @return string
		 */
		function getPermSection($section_name)
		{
			$ret = $section_name;
			$section_data =& $this->getSectionData($section_name);

			if ($section_data && isset($section_data['perm_prefix'])) {
				// this section uses other section permissions
				$ret = $this->Application->getUnitOption($section_data['perm_prefix'].'.main', 'PermSection');
			}
			return $ret;
		}
	}

?>