Code Analysis and Utilities

/**
 * Get specific modifier from a node
 * @param node - Node to check for modifier
 * @param kind - Type of modifier to find
 * @returns Modifier node if found, undefined otherwise
 */
function getModifier(node: ts.Node, kind: ts.Modifier['kind']): ts.Modifier | undefined;

/**
 * Check if node has any of the specified modifiers
 * @param modifiers - Modifiers array to check
 * @param kinds - Modifier kinds to look for
 * @returns true if any of the specified modifiers are present
 */
function hasModifier(modifiers: ts.ModifiersArray | undefined, ...kinds: Array<ts.Modifier['kind']>): boolean;

/**
 * Check if parameter declaration is a parameter property
 * @param node - Parameter declaration to check
 * @returns true if parameter has access modifier making it a property
 */
function isParameterProperty(node: ts.ParameterDeclaration): boolean;

/**
 * Check if node has access modifier (public, private, protected)
 * @param node - Class element or parameter to check
 * @returns true if node has access modifier
 */
function hasAccessModifier(node: ts.ClassElement | ts.ParameterDeclaration): boolean;

/**
 * Check if parameter is the 'this' parameter
 * @param parameter - Parameter declaration to check
 * @returns true if parameter represents 'this'
 */
function isThisParameter(parameter: ts.ParameterDeclaration): boolean;

/**
 * Check if node has specific node flags set
 * @param node - Node to check
 * @param flag - Node flags to test
 * @returns true if flags are set
 */
const isNodeFlagSet: (node: ts.Node, flag: ts.NodeFlags) => boolean;

/**
 * Check if type has specific type flags set
 * @param type - Type to check
 * @param flag - Type flags to test
 * @returns true if flags are set
 */
const isTypeFlagSet: (type: ts.Type, flag: ts.TypeFlags) => boolean;

/**
 * Check if symbol has specific symbol flags set
 * @param symbol - Symbol to check
 * @param flag - Symbol flags to test
 * @returns true if flags are set
 */
const isSymbolFlagSet: (symbol: ts.Symbol, flag: ts.SymbolFlags) => boolean;

/**
 * Check if object type has specific object flags set
 * @param objectType - Object type to check
 * @param flag - Object flags to test
 * @returns true if flags are set
 */
function isObjectFlagSet(objectType: ts.ObjectType, flag: ts.ObjectFlags): boolean;

/**
 * Check if node has specific modifier flags set
 * @param node - Node to check
 * @param flag - Modifier flags to test
 * @returns true if flags are set
 */
function isModifierFlagSet(node: ts.Node, flag: ts.ModifierFlags): boolean;

/**
 * Get the declaration kind (var, let, const) for a variable declaration list
 * @param declarationList - Variable declaration list to analyze
 * @returns Declaration kind enum value
 */
function getVariableDeclarationKind(declarationList: ts.VariableDeclarationList): VariableDeclarationKind;

/**
 * Check if variable declaration list is block-scoped (let/const)
 * @param declarationList - Declaration list to check
 * @returns true if declarations are block-scoped
 */
function isBlockScopedVariableDeclarationList(declarationList: ts.VariableDeclarationList): boolean;

/**
 * Check if variable declaration is block-scoped
 * @param declaration - Variable declaration to check
 * @returns true if declaration is block-scoped
 */
function isBlockScopedVariableDeclaration(declaration: ts.VariableDeclaration): boolean;

/**
 * Check if statement is a block-scoped declaration statement
 * @param statement - Statement to check
 * @returns true if statement declares block-scoped variables
 */
function isBlockScopedDeclarationStatement(statement: ts.Statement): statement is ts.DeclarationStatement;

/**
 * Variable declaration kind enumeration
 */
enum VariableDeclarationKind {
  Var,
  Let,
  Const
}

/**
 * Iterate through all identifiers in a destructuring pattern
 * @param pattern - Binding pattern to analyze
 * @param fn - Callback function for each identifier
 * @returns Result from callback if any
 */
function forEachDestructuringIdentifier<T>(
  pattern: ts.BindingPattern, 
  fn: (element: ts.BindingElement & { name: ts.Identifier }) => T
): T | undefined;

/**
 * Iterate through all declared variables in a declaration list
 * @param declarationList - Variable declaration list to analyze
 * @param cb - Callback function for each declared variable
 * @returns Result from callback if any
 */
function forEachDeclaredVariable<T>(
  declarationList: ts.VariableDeclarationList, 
  cb: (element: (ts.VariableDeclaration | ts.BindingElement) & { name: ts.Identifier }) => T
): T | undefined;

/**
 * Get the declaration that contains a binding element
 * @param node - Binding element to find declaration for
 * @returns Parent variable or parameter declaration
 */
function getDeclarationOfBindingElement(node: ts.BindingElement): ts.VariableDeclaration | ts.ParameterDeclaration;

/**
 * Determine the type of scope boundary a node represents
 * @param node - Node to check
 * @returns Scope boundary flags
 */
function isScopeBoundary(node: ts.Node): ScopeBoundary;

/**
 * Check if node is a type scope boundary
 * @param node - Node to check
 * @returns Type scope boundary flags
 */
function isTypeScopeBoundary(node: ts.Node): ScopeBoundary;

/**
 * Check if node is a function scope boundary
 * @param node - Node to check
 * @returns Function scope boundary flags
 */
function isFunctionScopeBoundary(node: ts.Node): ScopeBoundary;

/**
 * Check if node is a block scope boundary
 * @param node - Node to check
 * @returns Block scope boundary flags
 */
function isBlockScopeBoundary(node: ts.Node): ScopeBoundary;

/**
 * Check if statement is in single statement context (if/else/while body)
 * @param statement - Statement to check
 * @returns true if statement is not in block context
 */
function isInSingleStatementContext(statement: ts.Statement): boolean;

/**
 * Scope boundary enumeration
 */
enum ScopeBoundary {
  None = 0,
  Function = 1,
  Block = 2,
  Type = 4,
  ConditionalType = 8
}

/**
 * Scope boundary selector for hierarchical selection
 */
enum ScopeBoundarySelector {
  Function = ScopeBoundary.Function,
  Block = ScopeBoundarySelector.Function | ScopeBoundary.Block,
  Type = ScopeBoundarySelector.Block | ScopeBoundary.Type,
  InferType = ScopeBoundary.ConditionalType
}

/**
 * Find all import string literals in a source file
 * @param sourceFile - Source file to analyze
 * @param kinds - Types of imports to find
 * @param ignoreFileName - Whether to ignore filename-based imports
 * @returns Array of import string literals
 */
function findImports(
  sourceFile: ts.SourceFile, 
  kinds: ImportKind, 
  ignoreFileName?: boolean
): Array<ts.StringLiteral | ts.NoSubstitutionTemplateLiteral>;

/**
 * Find all import-like nodes in a source file
 * @param sourceFile - Source file to analyze
 * @param kinds - Types of imports to find
 * @param ignoreFileName - Whether to ignore filename-based imports
 * @returns Array of import-like nodes
 */
function findImportLikeNodes(
  sourceFile: ts.SourceFile, 
  kinds: ImportKind, 
  ignoreFileName?: boolean
): ImportLike[];

/**
 * Union type for import-like constructs
 */
type ImportLike = ts.ImportDeclaration 
  | ts.ImportEqualsDeclaration & {moduleReference: ts.ExternalModuleReference}
  | ts.ExportDeclaration & {moduleSpecifier: {}}
  | ts.CallExpression & {expression: ts.Token<ts.SyntaxKind.ImportKeyword> | ts.Identifier & {text: 'require'}, arguments: [ts.Expression, ...ts.Expression[]]}
  | ts.ImportTypeNode;

/**
 * Import kind enumeration for filtering import types
 */
enum ImportKind {
  ImportDeclaration = 1,
  ImportEquals = 2,
  ExportFrom = 4,
  DynamicImport = 8,
  Require = 16,
  ImportType = 32,
  All = ImportDeclaration | ImportEquals | ExportFrom | DynamicImport | Require | ImportType
}

/**
 * Check if node has its own 'this' reference
 * @param node - Node to check
 * @returns true if node establishes its own 'this' context
 */
function hasOwnThisReference(node: ts.Node): boolean;

/**
 * Check if node is a function with a body
 * @param node - Node to check
 * @returns true if node is function-like with body property
 */
function isFunctionWithBody(node: ts.Node): node is ts.FunctionLikeDeclaration & {body: {}};

/**
 * Get IIFE (Immediately Invoked Function Expression) call expression
 * @param func - Function expression or arrow function
 * @returns Call expression if function is immediately invoked
 */
function getIIFE(func: ts.FunctionExpression | ts.ArrowFunction): ts.CallExpression | undefined;

/**
 * Check if strict compiler option is enabled
 * @param options - Compiler options to check
 * @param option - Specific strict option to check
 * @returns true if strict option is enabled
 */
function isStrictCompilerOptionEnabled(options: ts.CompilerOptions, option: StrictCompilerOption): boolean;

/**
 * Check if boolean compiler option is enabled
 * @param options - Compiler options to check
 * @param option - Boolean option to check
 * @returns true if option is enabled
 */
function isCompilerOptionEnabled(options: ts.CompilerOptions, option: BooleanCompilerOptions | 'stripInternal'): boolean;

/**
 * Type for strict compiler options
 */
type StrictCompilerOption = 'noImplicitAny' | 'noImplicitThis' | 'strictNullChecks' | 'strictFunctionTypes' | 'strictPropertyInitialization' | 'alwaysStrict' | 'strictBindCallApply';

/**
 * Type for boolean compiler options
 */
type BooleanCompilerOptions = {[K in keyof ts.CompilerOptions]: NonNullable<ts.CompilerOptions[K]> extends boolean ? K : never} extends {[_ in keyof ts.CompilerOptions]: infer U} ? U : never;

/**
 * Check if statement is in ambient context
 * @param node - Statement to check
 * @returns true if statement is in ambient (declare) context
 */
function isStatementInAmbientContext(node: ts.Statement): boolean;

/**
 * Check if node is an ambient module block
 * @param node - Node to check
 * @returns true if node is ambient module block
 */
function isAmbientModuleBlock(node: ts.Node): node is ts.ModuleBlock;

/**
 * Check if module declaration is ambient
 * @param node - Module declaration to check
 * @returns true if module is ambient
 */
function isAmbientModule(node: ts.ModuleDeclaration): boolean;

import * as ts from "typescript";
import { 
  hasModifier, 
  isParameterProperty, 
  getVariableDeclarationKind,
  isScopeBoundary,
  findImports,
  isStrictCompilerOptionEnabled,
  VariableDeclarationKind,
  ScopeBoundary,
  ImportKind
} from "tsutils/util";

// Modifier analysis example
function analyzeClassMember(member: ts.ClassElement) {
  if (hasModifier(member.modifiers, ts.SyntaxKind.PrivateKeyword)) {
    console.log("Member is private");
  }
  
  if (hasModifier(member.modifiers, ts.SyntaxKind.StaticKeyword, ts.SyntaxKind.ReadonlyKeyword)) {
    console.log("Member is static or readonly");
  }
}

// Parameter property detection
function analyzeConstructorParameters(constructor: ts.ConstructorDeclaration) {
  constructor.parameters.forEach(param => {
    if (isParameterProperty(param)) {
      console.log(`Parameter ${param.name?.getText()} is also a property`);
    }
  });
}

// Variable declaration analysis
function analyzeVariableDeclarations(statement: ts.VariableStatement) {
  const kind = getVariableDeclarationKind(statement.declarationList);
  
  switch (kind) {
    case VariableDeclarationKind.Var:
      console.log("Function-scoped variables");
      break;
    case VariableDeclarationKind.Let:
      console.log("Block-scoped mutable variables");
      break;
    case VariableDeclarationKind.Const:
      console.log("Block-scoped immutable variables");
      break;
  }
}

// Scope boundary analysis
function analyzeScopeBoundaries(node: ts.Node) {
  const boundary = isScopeBoundary(node);
  
  if (boundary & ScopeBoundary.Function) {
    console.log("Node creates function scope");
  }
  
  if (boundary & ScopeBoundary.Block) {
    console.log("Node creates block scope");
  }
  
  if (boundary & ScopeBoundary.Type) {
    console.log("Node creates type scope");
  }
}

// Import analysis
function analyzeImports(sourceFile: ts.SourceFile) {
  const allImports = findImports(sourceFile, ImportKind.All);
  const dynamicImports = findImports(sourceFile, ImportKind.DynamicImport);
  
  console.log(`Total imports: ${allImports.length}`);
  console.log(`Dynamic imports: ${dynamicImports.length}`);
  
  allImports.forEach(importLiteral => {
    console.log(`Import: ${importLiteral.text}`);
  });
}

// Compiler options checking
function checkStrictMode(options: ts.CompilerOptions) {
  if (isStrictCompilerOptionEnabled(options, 'strictNullChecks')) {
    console.log("Strict null checks enabled");
  }
  
  if (isStrictCompilerOptionEnabled(options, 'noImplicitAny')) {
    console.log("No implicit any enabled");
  }
}