feat(GroupImportFixer): Ability to configure which type of imports sh…

…ould be grouped (#8046)

doc/rules/import/group_import.rst

@@ -4,12 +4,26 @@ Rule ``group_import``
 
 There MUST be group use for the same namespaces.
 
+Configuration
+-------------
+
+``group_types``
+~~~~~~~~~~~~~~~
+
+Defines the order of import types.
+
+Allowed types: ``list<string>``
+
+Default value: ``['classy', 'functions', 'constants']``
+
 Examples
 --------
 
 Example #1
 ~~~~~~~~~~
 
+*Default* configuration.
+
 .. code-block:: diff
 
    --- Original
@@ -18,6 +32,23 @@ Example #1
    -use Foo\Bar;
    -use Foo\Baz;
    +use Foo\{Bar, Baz};
+
+Example #2
+~~~~~~~~~~
+
+With configuration: ``['group_types' => ['classy']]``.
+
+.. code-block:: diff
+
+   --- Original
+   +++ New
+    <?php
+
+   -use A\Foo;
+    use function B\foo;
+   -use A\Bar;
+   +use A\{Bar, Foo};
+    use function B\bar;
 References
 ----------
 

phpstan.dist.neon

@@ -55,6 +55,6 @@ parameters:
         -
             message: '#^Method PhpCsFixer\\Tests\\.+::provide.+Cases\(\) return type has no value type specified in iterable type iterable\.$#'
             path: tests
-            count: 1014
+            count: 1013
     tipsOfTheDay: false
     tmpDir: dev-tools/phpstan/cache

src/Fixer/Import/GroupImportFixer.php

@@ -15,6 +15,10 @@
 namespace PhpCsFixer\Fixer\Import;
 
 use PhpCsFixer\AbstractFixer;
+use PhpCsFixer\Fixer\ConfigurableFixerInterface;
+use PhpCsFixer\FixerConfiguration\FixerConfigurationResolver;
+use PhpCsFixer\FixerConfiguration\FixerConfigurationResolverInterface;
+use PhpCsFixer\FixerConfiguration\FixerOptionBuilder;
 use PhpCsFixer\FixerDefinition\CodeSample;
 use PhpCsFixer\FixerDefinition\FixerDefinition;
 use PhpCsFixer\FixerDefinition\FixerDefinitionInterface;
@@ -23,12 +27,24 @@
 use PhpCsFixer\Tokenizer\CT;
 use PhpCsFixer\Tokenizer\Token;
 use PhpCsFixer\Tokenizer\Tokens;
+use PhpCsFixer\Utils;
+use Symfony\Component\OptionsResolver\Exception\InvalidOptionsException;
 
 /**
  * @author Volodymyr Kupriienko <vldmr.kuprienko@gmail.com>
+ * @author Greg Korba <greg@codito.dev>
  */
-final class GroupImportFixer extends AbstractFixer
+final class GroupImportFixer extends AbstractFixer implements ConfigurableFixerInterface
 {
+    /** @internal */
+    public const GROUP_CLASSY = 'classy';
+
+    /** @internal */
+    public const GROUP_CONSTANTS = 'constants';
+
+    /** @internal */
+    public const GROUP_FUNCTIONS = 'functions';
+
     public function getDefinition(): FixerDefinitionInterface
     {
         return new FixerDefinition(
@@ -37,6 +53,18 @@ public function getDefinition(): FixerDefinitionInterface
                 new CodeSample(
                     "<?php\nuse Foo\\Bar;\nuse Foo\\Baz;\n"
                 ),
+                new CodeSample(
+                    <<<'PHP'
+                        <?php
+
+                        use A\Foo;
+                        use function B\foo;
+                        use A\Bar;
+                        use function B\bar;
+
+                        PHP,
+                    ['group_types' => [self::GROUP_CLASSY]]
+                ),
             ]
         );
     }
@@ -46,24 +74,72 @@ public function isCandidate(Tokens $tokens): bool
         return $tokens->isTokenKindFound(T_USE);
     }
 
+    protected function createConfigurationDefinition(): FixerConfigurationResolverInterface
+    {
+        $allowedTypes = [self::GROUP_CLASSY, self::GROUP_FUNCTIONS, self::GROUP_CONSTANTS];
+
+        return new FixerConfigurationResolver([
+            (new FixerOptionBuilder('group_types', 'Defines the order of import types.'))
+                ->setAllowedTypes(['string[]'])
+                ->setAllowedValues([static function (array $types) use ($allowedTypes): bool {
+                    foreach ($types as $type) {
+                        if (!\in_array($type, $allowedTypes, true)) {
+                            throw new InvalidOptionsException(
+                                sprintf(
+                                    'Invalid group type: %s, allowed types: %s.',
+                                    $type,
+                                    Utils::naturalLanguageJoin($allowedTypes)
+                                )
+                            );
+                        }
+                    }
+
+                    return true;
+                }])
+                ->setDefault($allowedTypes)
+                ->getOption(),
+        ]);
+    }
+
     protected function applyFix(\SplFileInfo $file, Tokens $tokens): void
     {
-        $useWithSameNamespaces = $this->getSameNamespaces($tokens);
+        $useWithSameNamespaces = $this->getSameNamespacesByType($tokens);
 
         if ([] === $useWithSameNamespaces) {
             return;
         }
 
-        $this->removeSingleUseStatements($useWithSameNamespaces, $tokens);
-        $this->addGroupUseStatements($useWithSameNamespaces, $tokens);
+        $typeMap = [
+            NamespaceUseAnalysis::TYPE_CLASS => self::GROUP_CLASSY,
+            NamespaceUseAnalysis::TYPE_FUNCTION => self::GROUP_FUNCTIONS,
+            NamespaceUseAnalysis::TYPE_CONSTANT => self::GROUP_CONSTANTS,
+        ];
+
+        // As a first step we need to remove all the use statements for the enabled import types.
+        // We can't add new group imports yet, because we need to operate on previously determined token indices for all types.
+        foreach ($useWithSameNamespaces as $type => $uses) {
+            if (!\in_array($typeMap[$type], $this->configuration['group_types'], true)) {
+                continue;
+            }
+
+            $this->removeSingleUseStatements($uses, $tokens);
+        }
+
+        foreach ($useWithSameNamespaces as $type => $uses) {
+            if (!\in_array($typeMap[$type], $this->configuration['group_types'], true)) {
+                continue;
+            }
+
+            $this->addGroupUseStatements($uses, $tokens);
+        }
     }
 
     /**
      * Gets namespace use analyzers with same namespaces.
      *
-     * @return list<NamespaceUseAnalysis>
+     * @return array<NamespaceUseAnalysis::TYPE_*, list<NamespaceUseAnalysis>>
      */
-    private function getSameNamespaces(Tokens $tokens): array
+    private function getSameNamespacesByType(Tokens $tokens): array
     {
         $useDeclarations = (new NamespaceUsesAnalyzer())->getDeclarationsFromTokens($tokens);
 
@@ -94,7 +170,14 @@ private function getSameNamespaces(Tokens $tokens): array
             return 0 !== $namespaceDifference ? $namespaceDifference : $a->getFullName() <=> $b->getFullName();
         });
 
-        return $sameNamespaceAnalysis;
+        $sameNamespaceAnalysisByType = [];
+        foreach ($sameNamespaceAnalysis as $analysis) {
+            $sameNamespaceAnalysisByType[$analysis->getType()][] = $analysis;
+        }
+
+        ksort($sameNamespaceAnalysisByType);
+
+        return $sameNamespaceAnalysisByType;
     }
 
     /**
@@ -134,7 +217,16 @@ private function removeSingleUseStatements(array $statements, Tokens $tokens): v
     private function addGroupUseStatements(array $statements, Tokens $tokens): void
     {
         $currentUseDeclaration = null;
-        $insertIndex = \array_slice($statements, -1)[0]->getEndIndex() + 1;
+        $insertIndex = $statements[0]->getStartIndex();
+
+        // If group import was inserted in place of removed imports, it may have more tokens than before,
+        // and indices stored in imports of another type can be out-of-sync, and can point in the middle of group import.
+        // Let's move the pointer to the closest empty token (erased single import).
+        if (null !== $tokens[$insertIndex]->getId() || '' !== $tokens[$insertIndex]->getContent()) {
+            do {
+                ++$insertIndex;
+            } while (null !== $tokens[$insertIndex]->getId() || '' !== $tokens[$insertIndex]->getContent());
+        }
 
         foreach ($statements as $index => $useDeclaration) {
             if ($this->areDeclarationsDifferent($currentUseDeclaration, $useDeclaration)) {

src/Tokenizer/Analyzer/Analysis/NamespaceUseAnalysis.php

@@ -68,6 +68,8 @@ final class NamespaceUseAnalysis implements StartEndTokenAwareAnalysis
 
     /**
      * The type of import: class, function or constant.
+     *
+     * @var self::TYPE_*
      */
     private int $type;
 
@@ -140,6 +142,9 @@ public function getChunkEndIndex(): ?int
         return $this->chunkEndIndex;
     }
 
+    /**
+     * @return self::TYPE_*
+     */
     public function getType(): int
     {
         return $this->type;