From aadf3feb7b8090796a4dd083c90a5bc4893c8faf Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Sun, 4 Mar 2018 16:42:05 +0100
Subject: [statistics] Refine permissions, add some new ones

---
 modules-available/statistics/inc/filterset.inc.php | 82 ++++++++++++++++++----
 1 file changed, 69 insertions(+), 13 deletions(-)

(limited to 'modules-available/statistics/inc/filterset.inc.php')

diff --git a/modules-available/statistics/inc/filterset.inc.php b/modules-available/statistics/inc/filterset.inc.php
index 25c5c8fa..774bfd18 100644
--- a/modules-available/statistics/inc/filterset.inc.php
+++ b/modules-available/statistics/inc/filterset.inc.php
@@ -9,6 +9,8 @@ class FilterSet
 	private $sortDirection;
 	private $sortColumn;
 
+	private $cache = false;
+
 	public function __construct($filters)
 	{
 		$this->filters = $filters;
@@ -16,19 +18,28 @@ class FilterSet
 
 	public function setSort($col, $direction)
 	{
-		$this->sortDirection = $direction === 'DESC' ? 'DESC' : 'ASC';
+		$direction = ($direction === 'DESC' ? 'DESC' : 'ASC');
 
-		if (is_string($col) && array_key_exists($col, Page_Statistics::$columns)) {
-			$this->sortColumn = $col;
-		} else {
+		if (!is_string($col) || !array_key_exists($col, Page_Statistics::$columns)) {
 			/* default sorting column is clientip */
-			$this->sortColumn = 'clientip';
+			$col = 'clientip';
 		}
-
+		if ($col === $this->sortColumn && $direction === $this->sortDirection)
+			return;
+		$this->cache = false;
+		$this->sortDirection =  $direction;
+		$this->sortColumn = $col;
 	}
 
 	public function makeFragments(&$where, &$join, &$sort, &$args)
 	{
+		if ($this->cache !== false) {
+			$where = $this->cache['where'];
+			$join = $this->cache['join'];
+			$sort = $this->cache['sort'];
+			$args = $this->cache['args'];
+			return;
+		}
 		/* generate where clause & arguments */
 		$where = '';
 		$joins = [];
@@ -54,16 +65,13 @@ class FilterSet
 
 		$sort = " ORDER BY " . $concreteCol . " " . $this->sortDirection
 			. ", machineuuid ASC";
+		$this->cache = compact('where', 'join', 'sort', 'args');
 	}
 	
 	public function isNoId44Filter()
 	{
-		foreach ($this->filters as $filter) {
-			if (get_class($filter) === 'Id44Filter' && $filter->argument == 0) {
-				return true;
-			}
-		}
-		return false;
+		$filter = $this->hasFilter('Id44Filter');
+		return $filter !== false && $filter->argument == 0;
 	}
 
 	public function getSortDirection()
@@ -78,10 +86,58 @@ class FilterSet
 
 	public function filterNonClients()
 	{
-		if (Module::get('runmode') === false)
+		if (Module::get('runmode') === false || $this->hasFilter('IsClientFilter') !== false)
 			return;
+		$this->cache = false;
 		// Runmode module exists, add filter
 		$this->filters[] = new IsClientFilter(true);
 	}
 
+	/**
+	 * @param string $type filter type (class name)
+	 * @return false|Filter The filter, false if not found
+	 */
+	public function hasFilter($type)
+	{
+		foreach ($this->filters as $filter) {
+			if (get_class($filter) === $type) {
+				return $filter;
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Add a location filter based on the allowed permissions for the given permission.
+	 * Returns false if the user doesn't have the given permission for any location.
+	 *
+	 * @param string $permission permission to use
+	 * @return bool false if no permission for any location, true otherwise
+	 */
+	public function setAllowedLocationsFromPermission($permission)
+	{
+		$locs = User::getAllowedLocations($permission);
+		if (empty($locs))
+			return false;
+		if (in_array(0, $locs)) {
+			if (!isset($this->filters['permissions']))
+				return true;
+			unset($this->filters['permissions']);
+		} else {
+			$this->filters['permissions'] = new LocationFilter('=', $locs);
+		}
+		$this->cache = false;
+		return true;
+	}
+
+	/**
+	 * @return false|array
+	 */
+	public function getAllowedLocations()
+	{
+		if (isset($this->filters['permissions']->argument) && is_array($this->filters['permissions']->argument))
+			return $this->filters['permissions']->argument;
+		return false;
+	}
+
 }
-- 
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