CS fixes

lib/Database.php

@@ -358,7 +358,9 @@ class Database {
         if ($id==$parent) {
             throw new Db\ExceptionInput("circularDependence", $errData);
         }
-        // make sure both that the prospective parent exists, and that the it is not one of its children (a circular dependence)
+        // make sure both that the prospective parent exists, and that the it is not one of its children (a circular dependence);
+        // also make sure that a folder with the same prospective name and parent does not already exist: if the parent is null,
+        // SQL will happily accept duplicates (null is not unique), so we must do this check ourselves
         $p = $this->db->prepare(
             "WITH RECURSIVE
                 target as (select ? as user, ? as source, ? as dest, ? as rename),
@@ -377,6 +379,7 @@ class Database {
             // if using the desired parent would create a circular dependence, throw a different exception
             throw new Db\ExceptionInput("circularDependence", $errData);
         } elseif (!$p['available']) {
+            // if a folder with the same parent and name already exists, throw another different exception
             throw new Db\ExceptionInput("constraintViolation", ["action" => $this->caller(), "field" => (is_null($name) ? "parent" : "name")]);
         }
         return $parent;
@@ -391,6 +394,9 @@ class Database {
         } elseif (!($info & ValueInfo::VALID)) {
             throw new Db\ExceptionInput("typeViolation", ["action" => $this->caller(), "field" => "name", 'type' => "string"]);
         } elseif ($checkDuplicates) {
+            // make sure that a folder with the same prospective name and parent does not already exist: if the parent is null,
+            // SQL will happily accept duplicates (null is not unique), so we must do this check ourselves
+            $parent = $parent ? $parent : null;
             if ($this->db->prepare("SELECT exists(select id from arsse_folders where parent is ? and name is ?)", "int", "str")->run($parent, $name)->getValue()) {
                 throw new Db\ExceptionInput("constraintViolation", ["action" => $this->caller(), "field" => "name"]);
             }

lib/Misc/ValueInfo.php

@@ -13,7 +13,7 @@ class ValueInfo {
     const EMPTY = 1 << 2;
     const WHITE = 1 << 3;
 
-    static public function int($value): int {
+    public static function int($value): int {
         $out = 0;
         if (is_null($value)) {
             // check if the input is null
@@ -50,7 +50,7 @@ class ValueInfo {
         return $out;
     }
 
-    static public function str($value): int {
+    public static function str($value): int {
         $out = 0;
         // check if the input is null
         if (is_null($value)) {
@@ -75,7 +75,7 @@ class ValueInfo {
         return $out;
     }
 
-    static public function id($value, bool $allowNull = false): bool {
+    public static function id($value, bool $allowNull = false): bool {
         $info = self::int($value);
         if ($allowNull && ($info & self::NULL)) { // null (and allowed)
             return true;