<?php

  /**
   * System module functions
   *
   * @package activeCollab.modules.system
   */

  /**
   * Clear all user permissions / project related chaches
   *
   * @param User $user
   */
  function clean_user_permissions_cache($user) {
    cache_remove('visible_types_filter_for_' . $user->getId());
  	cache_remove('visible_project_types_filter_for_' . $user->getId());
  	cache_remove('visible_project_types_for_' . $user->getId());
  } // clean_user_permissions_cache

  /**
   * Clear all permissions or caches when project gets updated or removed
   *
   * @param Project $project
   */
  function clean_project_permissions_cache($project) {
  	clean_permissions_cache();
  } // clean_project_permissions_cache

  /**
   * Clear entire user cache
   */
  function clean_permissions_cache() {
    cache_remove_by_pattern('visible_types_filter_for_*');
  	cache_remove_by_pattern('visible_project_types_filter_for_*');
  	cache_remove_by_pattern('visible_project_types_for_*');
  } // clean_permissions_cache
  
  /**
   * Cleanup quick jump/add cache for $user if specified, if not for everyone
   * 
   * @param User $user
   */
  function clean_quick_jump_and_quick_add_cache($user = null) {
    if($user instanceof User) {
      cache_remove_by_pattern($user->getQuickAddCacheId('*'));
			cache_remove("quick_jump_for_{$user->getId()}");
    } else {
      cache_remove_by_pattern('quick_add_for_*');
			cache_remove_by_pattern('quick_jump_for_*');
    } // if
  } // clean_quick_jump_and_quick_add_cache

  // ---------------------------------------------------
  //  Project object types
  // ---------------------------------------------------

  /**
   * Return array of object types that can be completed
   *
   * Object that can be completed are counted and we use that data to see how
   * far project has gone (completed vs open tasks)
   *
   * @return array
   */
  function get_completable_project_object_types() {
    static $types = false;

    if($types === false) {
      $types = EventsManager::trigger('on_get_completable_project_object_types', array(), array());
      if(is_foreachable($types)) {
        sort($types);
      } // if
    } // if

    return $types;
  } // get_completable_project_object_types

  /**
   * Return day project object types
   *
   * Day project object types are important day events - like milestones or
   * events. They are shown in calendar without the day zoom
   *
   * @return array
   */
  function get_day_project_object_types() {
    static $types = false;

    if($types === false) {
      $types = EventsManager::trigger('on_get_day_project_object_types', array(), array());
      if(is_foreachable($types)) {
        sort($types);
      } // if
    } // if

    return $types;
  } // get_day_project_object_types

  /**
   * Return URL-s of project icons, large and small
   *
   * @param Project $project
   * @return array
   */
  function get_project_icon_urls($project) {
  	$project_id = $project instanceof Project ? $project->getId() : (integer) $project;
  	if($project_id) {
  	  $cached_values = cache_get('project_icons');
  	  if(is_array($cached_values)) {
      	if(isset($cached_values[$project_id])) {
      	  return $cached_values[$project_id];
      	} // if
  	  } else {
  	    $cached_values = array(); // initial if cache value is new
  	  } // if
  	  
  	  if($project instanceof Project) {
  	    $client_id = $project->getCompanyId();
  	  } else {
  	    $client_id = (integer) DB::executeFirstCell('SELECT company_id FROM ' . TABLE_PREFIX . 'projects WHERE id = ?', $project_id);
  	  } // if

    	$icons = array();
    	$sizes = array('40x40', '16x16');
    	foreach($sizes as $size) {
    	  $supposed_project_icon_path = ENVIRONMENT_PATH . '/' . PUBLIC_FOLDER_NAME . "/projects_icons/$project_id.$size.png";
    	  $supposed_client_icon_path = ENVIRONMENT_PATH . '/' . PUBLIC_FOLDER_NAME . "/logos/$client_id.$size.png";
    	      	  
    	  if(is_file($supposed_project_icon_path)) {
    	    $icons[] = ROOT_URL."/projects_icons/$project_id.$size.png?updated_on=" . filemtime($supposed_project_icon_path);
    	  } elseif($client_id && is_file($supposed_client_icon_path)) {
    	    $icons[] = ROOT_URL . "/logos/$client_id.$size.png?updated_on=" . filemtime($supposed_client_icon_path);
    	  } else {
    	    $icons[] = ROOT_URL . "/projects_icons/default.$size.png";
    	  } // if
    	} // foreach

    	$cached_values[$project_id] = $icons;
    	cache_set('project_icons', $cached_values);

    	return $icons;
  	} // if

  	return array('#', '#'); // no project?
  } // get_project_icon_urls

  // ---------------------------------------------------
  //  Custom
  // ---------------------------------------------------

  /**
   * Group objects by given date
   *
   * If $index_by_timestamp is set to TRUE, key will
   *
   * @param array $objects
   * @param User $user
   * @param string $getter
   * @param boolean $today_yesterday
   * @param boolean $index_by_timestamp
   * @return array
   */
  function group_by_date($objects, $user = null, $getter = 'getCreatedOn', $today_yesterday = true, $index_by_timestamp = false) {
    $result = array();
    if(is_foreachable($objects)) {
      AngieApplication::useHelper('date', GLOBALIZATION_FRAMEWORK, 'modifier');

      $offset = $user instanceof User ? get_user_gmt_offset($user) : 0;

      foreach($objects as $object) {
        
        $gmt = is_object($object) ? $object->$getter() : $object[$getter];
        if(is_string($gmt) || is_integer($gmt)) {
          $gmt = new DateValue($gmt);
        } // if
        
        if($gmt instanceof DateValue) {
          $date = $gmt->advance($offset, false); // advance, but don't mutate
          
          if($index_by_timestamp) {
            $date_string = $gmt instanceof DateTimeValue ? $gmt->beginningOfDay()->getTimestamp() : $gmt->getTimestamp();
          } else {
            if($today_yesterday) {
              if($date->isToday($offset)) {
                $date_string = lang('Today');
              } elseif($date->isYesterday($offset)) {
                $date_string = lang('Yesterday');
              } else {
                $date_string = smarty_modifier_date($date);
              } // if
            } else {
              $date_string = smarty_modifier_date($date);
            } // if
          } // if

          if(!isset($result[$date_string])) {
            $result[$date_string] = array();
          } // if

          $result[$date_string][] = $object;
        } // if
      } // foreach
    } // if
    
    return $result;
  } // group_by_date

  /**
   * Group $objects by month they were created
   *
   * @param array $objects
   * @param string $getter
   * @return array
   */
  function group_by_month($objects, $getter = 'getCreatedOn') {
    $months = Globalization::getMonthNames();

    $result = array();
    if(is_foreachable($objects)) {
      foreach($objects as $object) {
        $date = $object->$getter();

        $month_name = $months[$date->getMonth()];

        if($date instanceof DateValue) {
          if(!isset($result[$date->getYear()])) {
            $result[$date->getYear()] = array();
          } // if

          if(!isset($result[$date->getYear()][$month_name])) {
            $result[$date->getYear()][$month_name] = array();
          } // if

          $result[$date->getYear()][$month_name][] = $object;
        } // if
      } // foreach
    } // if
    return $result;
  } // group_by_month
  
  /**
   * Group objects by the first letter
   *
   * @param unknown_type $objects
   * @param unknown_type $getter
   * @return unknown
   */
  function group_by_first_letter($objects, $getter = 'getName') {
    $letters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    
    $result = array();
    if(is_foreachable($objects)) {
      foreach($objects as $object) {
        $first_letter = substr_utf($object->$getter(), 0, 1);
        
        if(strpos($letters, $first_letter) === false) {
          $first_letter = '#';
        } else {
          $first_letter = strtoupper($first_letter);
        } // if
        
        if(!isset($result[$first_letter])) {
          $result[$first_letter] = array();
        } // if

        $result[$first_letter][] = $object;
      } // foreach
      
      ksort($result);
    } // if
    
    return $result;
  } // group_by_first_letter

  /**
   * Group objects by map array
   * 
   * @param $map
   * @param $objects
   * @param $getter
   */
  function group_by_mapped($map, $objects, $getter, $user = null, $unset_empty_mapper = true) {
    
    if($objects instanceof DBResult) {
      $objects = $objects->toArray();
    }//objects
    
    $results = array();
    
    if(is_foreachable($map) && $getter) {
      foreach ($map as $map_id => $map_name) {
        foreach($objects as $key => $object) {
          if($object->$getter($user) == $map_id) {
            $results[$map_name][] = $object;
            unset($objects[$key]);
          }//if
        }//foreach
        if(!is_foreachable($results[$map_name])) {
          if($unset_empty_mapper) {
            //unset empty 
            unset($results[$map_name]);
          }//if
        } else {
          usort($results[$map_name], "compare"); 
        }//if  
      }//foreach
      
    }//if
    
    if(is_foreachable($objects)) {
      usort($objects,"compare");
      $results[' '] = $objects;
    }//if
      
    return $results;
    
  }//group_by_mapped
  
  /**
   * Compare two object by name
   * 
   * @param $a
   * @param $b
   */
  function compare($a, $b) {
    if ($a->getId() == $b->getId()) {
      return 0;
    } else {
      return strcmp($a->getName(), $b->getName());
    }//if
  }//compare
  
  
  /**
   * Render iCal data
   *
   * @param string $name iCalendar name
   * @param array $objects
   * @param boolean $include_project_name
   * @return void
   */
  function render_icalendar($name, $objects, $include_project_name = false) {
  	require_once ANGIE_PATH . '/classes/icalendar/iCalCreator.class.php';

    $calendar = new vcalendar();
    //$calendar->setProperty('VERSION', '1.0');
    $calendar->setProperty('X-WR-CALNAME', $name);
    $calendar->setProperty('METHOD', 'PUBLISH');

    $projects = array();
    foreach($objects as $object) {
      $summary = $object->getName();
      if($include_project_name) {
        $project_id = $object->getProjectId();
        if(isset($projects[$project_id])) {
          $summary .= ' | ' . $projects[$project_id]->getName();
        } else {
          $project = $object->getProject();
          if($project instanceof Project) {
            $projects[$project_id] = $project;
            $summary .= ' | ' . $projects[$project_id]->getName();
          } // if
        } // if
      } // if

    	switch(strtolower($object->getType())) {
    		case 'milestone':
    		  $start_on = $object->getStartOn();
    		  $due_on   = $object->getDueOn();
    		  
    		  $event = new vevent();

    		  if ($start_on instanceof DateValue) {
	    		  $start_on_year = $start_on->getYear();
	      		$start_on_month = $start_on->getMonth() < 10 ? '0' . $start_on->getMonth() : $start_on->getMonth();
	      		$start_on_day = $start_on->getDay() < 10 ? '0' . $start_on->getDay() : $start_on->getDay();
	      		
	      		$event->setProperty('dtstart', array($start_on_year, $start_on_month, $start_on_day), array('VALUE'=>'DATE'));
    		  } else {
            continue;
          }//if
					
      		if ($due_on instanceof DateValue) {
	      		$due_on->advance(24 * 60 * 60, true); // One day shift because iCal and Windows Calendar don't include last day
	      		
	      		$due_on_year = $due_on->getYear();
	      		$due_on_month = $due_on->getMonth() < 10 ? '0' . $due_on->getMonth() : $due_on->getMonth();
	      		$due_on_day = $due_on->getDay() < 10 ? '0' . $due_on->getDay() : $due_on->getDay();
	      		
	      		$event->setProperty('dtend', array($due_on_year, $due_on_month, $due_on_day), array('VALUE'=>'DATE'));
          } else {
            continue;
          }//if

      		

          $event->setProperty('dtstamp', date('Ymd'));
          $event->setProperty('summary', $summary);
    
          if($object->getBody()) {
            $event->setProperty('description', $object->getBody() . "\n\n" . lang('Details: ') . $object->getViewUrl());
          } else {
            $event->setProperty('description', lang('Details') . ': ' . $object->getViewUrl());
          } // if
    
          switch($object->getPriority()) {
            case PRIORITY_HIGHEST:
          	  $event->setProperty('priority', 1);
          	  break;
          	case PRIORITY_HIGH:
          	  $event->setProperty('priority', 3);
          	  break;
          	case PRIORITY_LOW:
          	  $event->setProperty('priority', 7);
          	  break;
          	case PRIORITY_LOWEST:
          	  $event->setProperty('priority', 9);
          	  break;
          	default:
          	  $event->setProperty('priority', 5);
          } // switch
    
        	$calendar->addComponent($event);
        	break;
    		case 'task':
    		case 'todolist':
    		  $start_on = $object->getDueOn();
    		  $due_on   = $object->getDueOn();

      		$event = new vevent();

      		$event->setProperty('summary', $summary);
      		$event->setProperty('description', $object->getName() . "\n\n" . lang('Details') . ': ' . $object->getViewUrl());

        	switch($object->getPriority()) {
        		case PRIORITY_HIGHEST:
        		  $event->setProperty('priority', 1);
        		  break;
        		case PRIORITY_HIGH:
        		  $event->setProperty('priority', 3);
        		  break;
        		case PRIORITY_LOW:
        		  $event->setProperty('priority', 7);
        		  break;
        		case PRIORITY_LOWEST:
        		  $event->setProperty('priority', 9);
        		  break;
        		default:
        		  $event->setProperty('priority', 5);
        	} // switch
        		
        	if($start_on instanceof DateValue) {
      		    
        		$start_on_year = $start_on->getYear();
      		  $start_on_month = $start_on->getMonth() < 10 ? '0' . $start_on->getMonth() : $start_on->getMonth();
      		  $start_on_day = $start_on->getDay() < 10 ? '0' . $start_on->getDay() : $start_on->getDay();

        		$event->setProperty('dtstart', array($start_on_year, $start_on_month, $start_on_day), array('VALUE'=>'DATE'));
          } else {
            continue;
          }//if

      		if($due_on instanceof DateValue) {
      		  $due_on->advance(24 * 60 * 60, true); // One day shift because iCal and Windows Calendar don't include last day
      		    
        		$due_on_year = $due_on->getYear();
        		$due_on_month = $due_on->getMonth() < 10 ? '0' . $due_on->getMonth() : $due_on->getMonth();
        		$due_on_day = $due_on->getDay() < 10 ? '0' . $due_on->getDay() : $due_on->getDay();

        		$event->setProperty('dtend', array($due_on_year, $due_on_month, $due_on_day), array('VALUE'=>'DATE'));
          } else {
            continue;
          }//if
      		  
      		$event->setProperty('dtstamp', date('Ymd'));

          $calendar->addComponent($event);
    		  break;
    		default:
   			  break;
    	} //switch
    } // foreach
		
    $cal = $calendar->createCalendar();
    
    header('Content-Type: text/calendar; charset=UTF-8');
    header('Content-Disposition: attachment; filename="' . $name .'.ics"');
    header('Cache-Control: no-cache, no-store, max-age=0, must-revalidate');
    header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
    header('Pragma: no-cache');

    print $cal;
    die();
  } // render_icalendar
  
  // ---------------------------------------------------
  //  Start page
  // ---------------------------------------------------
  
  /**
   * Returns logo of the company, if company has no logo, it returns the default logo
   *
   * @param integer $company_id
   * @param string $size
   * @return string
   */
  function get_company_logo_url($company_id, $size) {
  	$path = ENVIRONMENT_PATH . '/' . PUBLIC_FOLDER_NAME . "/logos/$company_id.$size.png";
  	
		if(is_file($path)) {
      return ROOT_URL . '/logos/' . $company_id . ".$size.png?updated_on=" . filemtime($path);
    } else {
      return ROOT_URL . "/logos/default.$size.png";
    } // if
  } // get_company_logo_url
  
  /**
   * return project icon url if exists, if not, return the default one
   * 
   * @param integer $project_id
   * @param string $size
   */
  function get_project_icon_url($project_id, $size) {
  	$path = ENVIRONMENT_PATH . '/' . PUBLIC_FOLDER_NAME . "/projects_icons/$project_id.$size.png";
  	
		if(is_file($path)) {
      return ROOT_URL . '/projects_icons/' . $project_id . ".$size.png?updated_on=" . filemtime($path);
    } else {
      return ROOT_URL . "/projects_icons/default.$size.png";
    } // if
  } // get_project_icon_url
  
  /**
   * Prepare objects for timeline diagram
   * 
   * @param array $objects
   * @return array
   */
  function prepare_for_timeline_diagram(&$objects, &$user) {
		$prepared = array();
		foreach ($objects as $object) {
			$prepared[] = $object->describe(Authentication::getLoggedUser(), true);
		} // foreach
		return $prepared;
  } // prepare_for_timeline_diagram
  
  /**
   * Get letter map
   *
   * @return array
   */
  function get_letter_map() {
  	return array(
			'a' => 'A', 
			'b' => 'B', 
			'c' => 'C', 
			'd' => 'D', 
			'e' => 'E', 
			'f' => 'F', 
			'g' => 'G', 
			'h' => 'H', 
			'i' => 'I', 
			'j' => 'J', 
			'k' => 'K', 
			'l' => 'L', 
			'm' => 'M', 
			'n' => 'N', 
			'o' => 'O', 
			'p' => 'P', 
			'q' => 'Q', 
			'r' => 'R', 
			's' => 'S', 
			't' => 'T', 
			'u' => 'U', 
			'v' => 'V', 
			'w' => 'W', 
			'x' => 'X', 
			'y' => 'Y', 
			'z' => 'Z', 
			'#' => '#', 
		);
  } // get_letter_map
  
  /**
   * Returns prepared milestone link based on $milestone value
   *
   * Reason why this function is global function is so it can be used as a
   * Smarty helper without the need to define it explicitely
   *
   * $milestone can be NULL
   *
   * @param Milestone $milestone
   * @return string
   */
  function milestone_link($milestone) {
    if($milestone instanceof Milestone) {
      $class = 'milestone';

      if($milestone->complete()->isCompleted()) {
        $class .= ' completed';
      } // if

      return '<a href="' . $milestone->getViewUrl() . '" class="' . $class . '">' . clean($milestone->getName()) . '</a>';
    } else {
      return lang('None');
    } // if
  } // milestone_link

/**
 * Can user edit project object
 *
 * @param array $task
 * @param User $user
 * @param Project $project
 * @param Boolean $can_manage_milestones
 * @param array $all_assignees
 * @return boolan
 */
function can_edit_project_object($task, $user, $project, $can_manage_tasks, $all_assignees = null) {
  $visibility     = array_var($task, 'visibility');
  $created_by_id  = array_var($task, 'created_by_id');
  $assignee_id    = array_var($task, 'assignee_id');

  if (!($project instanceof Project)) {
    return false;
  } // if

  if ($user->isAdministrator() || $user->isProjectManager() || $project->isLeader($user)) {
    return true; // administrators and project managers have all permissions
  } // if

  if (($visibility < VISIBILITY_NORMAL) && !$user->canSeePrivate()) {
    return false;
  } // if

  if ($can_manage_tasks) {
    return true;
  } // if

  if ($created_by_id == $user->getId()) {
    return true;
  } // if

  if ($assignee_id == $user->getId() || in_array($user->getId(), $all_assignees)) {
    return true;
  } // if

  return false;
} // can_edit_project_object

/**
 * Can we trash this project_object
 *
 * @param $task
 * @param $user
 * @param $project
 * @param $all_assignees
 * @return bool
 */
function can_trash_project_object($task, $user, $project, $can_manage_tasks, $all_assignees = null) {
  $state = array_var($task, 'state', STATE_VISIBLE);
  $visibility = array_var($task, 'visibility');
  $created_by_id  = array_var($task, 'created_by_id');

  if (!($project instanceof Project)) {
    return false;
  } // if

  if ($user->isAdministrator() || $user->isProjectManager() || $project->isLeader($user)) {
    return true; // administrators and project managers have all permissions
  } // if

  if ($state == STATE_TRASHED) {
    return false;
  } // if

  if (($visibility < VISIBILITY_NORMAL) && !$user->canSeePrivate()) {
    return false;
  } // if

  if ($can_manage_tasks) {
    return true;
  } // if

  if ($created_by_id == $user->getId()) {
    return true;
  } // if

  return false;
} // can_trash_project_object