Simplify a lot of APIs

src/Psalm/Checker/CanAlias.php

@@ -0,0 +1,121 @@
+<?php
+namespace Psalm\Checker;
+
+use PhpParser\Node\Stmt\Namespace_;
+use PhpParser;
+use Psalm\Context;
+use Psalm\StatementsSource;
+use Psalm\Type;
+
+trait CanAlias
+{
+    /**
+     * @var array<string, string>
+     */
+    protected $aliased_classes = [];
+
+    /**
+     * @var array<string, string>
+     */
+    protected $aliased_classes_flipped = [];
+
+    /**
+     * @var array<string, string>
+     */
+    protected $aliased_functions = [];
+
+    /**
+     * @var array<string, string>
+     */
+    protected $aliased_constants = [];
+
+    /**
+     * @param  PhpParser\Node\Stmt\Use_ $stmt
+     * @return void
+     */
+    public function visitUse(PhpParser\Node\Stmt\Use_ $stmt)
+    {
+        foreach ($stmt->uses as $use) {
+            $use_path = implode('\\', $use->name->parts);
+
+            switch ($use->type !== PhpParser\Node\Stmt\Use_::TYPE_UNKNOWN ? $use->type : $stmt->type) {
+                case PhpParser\Node\Stmt\Use_::TYPE_FUNCTION:
+                    $this->aliased_functions[strtolower($use->alias)] = $use_path;
+                    break;
+
+                case PhpParser\Node\Stmt\Use_::TYPE_CONSTANT:
+                    $this->aliased_constants[$use->alias] = $use_path;
+                    break;
+
+                case PhpParser\Node\Stmt\Use_::TYPE_NORMAL:
+                    $this->aliased_classes[strtolower($use->alias)] = $use_path;
+                    $this->aliased_classes_flipped[strtolower($use_path)] = $use->alias;
+                    break;
+            }
+        }
+    }
+
+    /**
+     * @param  PhpParser\Node\Stmt\GroupUse $stmt
+     * @return void
+     */
+    public function visitGroupUse(PhpParser\Node\Stmt\GroupUse $stmt)
+    {
+        $use_prefix = implode('\\', $stmt->prefix->parts);
+
+        foreach ($stmt->uses as $use) {
+            $use_path = $use_prefix . '\\' . implode('\\', $use->name->parts);
+
+            switch ($use->type !== PhpParser\Node\Stmt\Use_::TYPE_UNKNOWN ? $use->type : $stmt->type) {
+                case PhpParser\Node\Stmt\Use_::TYPE_FUNCTION:
+                    $this->aliased_functions[strtolower($use->alias)] = $use_path;
+                    break;
+
+                case PhpParser\Node\Stmt\Use_::TYPE_CONSTANT:
+                    $this->aliased_constants[$use->alias] = $use_path;
+                    break;
+
+                case PhpParser\Node\Stmt\Use_::TYPE_NORMAL:
+                    $this->aliased_classes[strtolower($use->alias)] = $use_path;
+                    $this->aliased_classes_flipped[strtolower($use_path)] = $use->alias;
+                    break;
+            }
+        }
+    }
+
+    /**
+     * @return array<string, string>
+     */
+    public function getAliasedClasses()
+    {
+        return $this->aliased_classes;
+    }
+
+    /**
+     * @return array<string, string>
+     */
+    public function getAliasedClassesFlipped()
+    {
+        return $this->aliased_classes_flipped;
+    }
+
+    /**
+     * Gets a list of all aliased constants
+     *
+     * @return array<string, string>
+     */
+    public function getAliasedConstants()
+    {
+        return $this->aliased_constants;
+    }
+
+    /**
+     * Gets a list of all aliased functions
+     *
+     * @return array<string, string>
+     */
+    public function getAliasedFunctions()
+    {
+        return $this->aliased_functions;
+    }
+}

src/Psalm/Checker/ClassChecker.php

@@ -41,18 +41,16 @@ public function __construct(PhpParser\Node\Stmt\ClassLike $class, StatementsSour
         self::$class_extends[$this->fq_class_name] = [];
 
         if ($this->class->extends) {
-            $this->parent_class = self::getFQCLNFromNameObject(
+            $this->parent_fq_class_name = self::getFQCLNFromNameObject(
                 $this->class->extends,
-                $this->namespace,
-                $this->aliased_classes
+                $this->source
             );
         }
 
         foreach ($class->implements as $interface_name) {
             $fq_interface_name = self::getFQCLNFromNameObject(
                 $interface_name,
-                $this->namespace,
-                $this->aliased_classes
+                $this->source
             );
 
             $storage->class_implements[strtolower($fq_interface_name)] = $fq_interface_name;