Add parser modules

src/parsers/typeAliasParser.ts

@@ -0,0 +1,144 @@
+import { createASTUtils } from '../utils/astUtils';
+import { typeToString } from '../utils/typeUtils';
+import { TypeAlias, GenericParameter } from '../types';
+
+export interface TypeAliasParserOptions {
+  expandUnions?: boolean;
+  expandIntersections?: boolean;
+  inlineObjects?: boolean;
+}
+
+export class TypeAliasParser {
+  private astUtils: ReturnType<typeof createASTUtils>;
+  private options: TypeAliasParserOptions;
+
+  constructor(options: TypeAliasParserOptions = {}) {
+    this.astUtils = createASTUtils();
+    this.options = {
+      expandUnions: options.expandUnions ?? false,
+      expandIntersections: options.expandIntersections ?? false,
+      inlineObjects: options.inlineObjects ?? true
+    };
+  }
+
+  parse(source: string, filePath: string): TypeAlias[] {
+    const ast = this.astUtils.parse(source, filePath);
+    const typeAliases = this.astUtils.getTypeAliases(ast);
+
+    return typeAliases.map((typeAlias) => this.parseTypeAlias(typeAlias));
+  }
+
+  parseTypeAlias(node: any): TypeAlias {
+    const typeAnnotation = typeToString(node.typeAnnotation);
+    const generics = this.parseGenericParameters(node.typeParameters);
+    const dependencies = this.extractDependencies(node);
+
+    return {
+      name: node.id.name,
+      filePath: '',
+      startLine: node.loc?.start?.line ?? 0,
+      endLine: node.loc?.end?.line ?? 0,
+      kind: 'type_alias',
+      dependencies,
+      typeAnnotation,
+      extends: [],
+      generics,
+      rawNode: node
+    };
+  }
+
+  private parseGenericParameters(params: any | null): GenericParameter[] {
+    if (!params || !params.params) {
+      return [];
+    }
+    return params.params.map((param: any) => ({
+      name: param.name.name,
+      constraint: param.constraint ? typeToString(param.constraint) : undefined,
+      default: param.default ? typeToString(param.default) : undefined
+    }));
+  }
+
+  private extractDependencies(node: any): string[] {
+    const dependencies: string[] = [];
+
+    const typeRefs = this.astUtils.findNodes<any>(
+      node,
+      (n): n is any => n.type === 'TSTypeReference'
+    );
+
+    for (const ref of typeRefs) {
+      if (ref.typeName.type === 'Identifier') {
+        const name = ref.typeName.name;
+        if (!dependencies.includes(name)) {
+          dependencies.push(name);
+        }
+      }
+    }
+
+    const unions = this.astUtils.findNodes<any>(
+      node,
+      (n): n is any => n.type === 'TSUnionType'
+    );
+
+    for (const union of unions) {
+      for (const type of union.types) {
+        if (type.type === 'TSTypeReference' && type.typeName.type === 'Identifier') {
+          const name = type.typeName.name;
+          if (!dependencies.includes(name)) {
+            dependencies.push(name);
+          }
+        }
+      }
+    }
+
+    const intersections = this.astUtils.findNodes<any>(
+      node,
+      (n): n is any => n.type === 'TSIntersectionType'
+    );
+
+    for (const intersection of intersections) {
+      for (const type of intersection.types) {
+        if (type.type === 'TSTypeReference' && type.typeName.type === 'Identifier') {
+          const name = type.typeName.name;
+          if (!dependencies.includes(name)) {
+            dependencies.push(name);
+          }
+        }
+      }
+    }
+
+    return dependencies;
+  }
+
+  getComplexityScore(typeAlias: TypeAlias): number {
+    let score = 1;
+    const typeStr = typeAlias.typeAnnotation;
+
+    score += (typeStr.match(/\|/g) || []).length * 2;
+    score += (typeStr.match(/&/g) || []).length * 2;
+    score += (typeStr.match(/{/g) || []).length;
+    score += (typeStr.match(/</g) || []).length * 3;
+
+    return score;
+  }
+
+  isUnionType(typeAlias: TypeAlias): boolean {
+    return typeAlias.typeAnnotation.includes('|');
+  }
+
+  isIntersectionType(typeAlias: TypeAlias): boolean {
+    return typeAlias.typeAnnotation.includes('&');
+  }
+
+  isGenericType(typeAlias: TypeAlias): boolean {
+    return typeAlias.generics.length > 0;
+  }
+
+  getReferencedTypes(typeAlias: TypeAlias): string[] {
+    return typeAlias.dependencies;
+  }
+}
+
+export function createTypeAliasParser(options?: TypeAliasParserOptions): TypeAliasParser {
+  return new TypeAliasParser(options);
+}