Add rules for use statements

- Check that use statements are alphabetically sorted
- Check that all classes are used through uses and not referenced directly
- Check that there are no use statements for classes within the same namespace
- Check that all declared uses are actually needed

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "third-party/slevomat"]
+	path = third-party/slevomat
+	url = [email protected]:slevomat/coding-standard.git

Lunr/ruleset.xml

@@ -135,4 +135,17 @@
       <property name="spacing" value="1"/>
     </properties>
   </rule>
+
+  <rule ref="SlevomatCodingStandard.Namespaces.AlphabeticallySortedUses"/>
+  <rule ref="SlevomatCodingStandard.Namespaces.ReferenceUsedNamesOnly">
+    <properties>
+      <property name="searchAnnotations" value="true"/>
+    </properties>
+  </rule>
+  <rule ref="SlevomatCodingStandard.Namespaces.UseFromSameNamespace"/>
+  <rule ref="SlevomatCodingStandard.Namespaces.UnusedUses">
+    <properties>
+      <property name="searchAnnotations" value="true"/>
+    </properties>
+  </rule>
 </ruleset>

README.md

@@ -87,9 +87,14 @@ $config = [
 - Classes must have their opening bracket on a new line and not have it indented.
 - There must be a single space after the scope keyword.
 - All class keywords must be lowercase.
-- Use declarations should be according to PSR-2  [psr-2/#3-namespace-and-use-declarations](https://www.php-fig.org/psr/psr-2/#3-namespace-and-use-declarations)
 - There must be only one class declaration per file
 
+## Use declarations
+- Use declarations should be according to PSR-2  [psr-2/#3-namespace-and-use-declarations](https://www.php-fig.org/psr/psr-2/#3-namespace-and-use-declarations)
+- Use imports should be sorted alphabetically
+- All classes from other namespaces should be referenced through use statements
+- Classes from the same namespace should not be referenced through use statements
+
 ## Strings
 - Always have one space preceding and succeeding the concatenation symbol.
 

composer.json

@@ -7,7 +7,8 @@
     "minimum-stability": "dev",
     "prefer-stable": true,
     "require": {
-        "php": "^8.1"
+        "php": "^8.1",
+        "phpstan/phpdoc-parser": "^1.23.1"
     },
     "autoload": {
         "psr-4": {

decomposer.json

@@ -1 +1,10 @@
-{}
+{
+    "phpdoc-parser": {
+        "url": "https://github.com/phpstan/phpdoc-parser.git",
+        "version": "1.29.1",
+        "psr4": {
+            "prefix": "PHPStan\\PhpDocParser",
+            "search-path": "/src/"
+        }
+    }
+}