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/**
* Constants for file classifications to avoid magic strings
*/
export const Classification = {
BARREL: 'barrel-export' as const,
TYPE_DEFINITION: 'type-definition' as const,
NEXTJS_PAGE: 'nextjs-page' as const,
LAMBDA_HANDLER: 'lambda-handler' as const,
SERVICE: 'service-file' as const,
EMAIL_TEMPLATE: 'email-template' as const,
PARSER: 'parser-file' as const,
COHESIVE_MODULE: 'cohesive-module' as const,
UTILITY_MODULE: 'utility-module' as const,
MIXED_CONCERNS: 'mixed-concerns' as const,
UNKNOWN: 'unknown' as const,
};
/**
* Classify a file into a specific type for better analysis context
*
* @param node The dependency node representing the file
* @param cohesionScore The calculated cohesion score for the file
* @param domains The detected domains/concerns for the file
* @returns The determined file classification
*/
export function classifyFile(
node: DependencyNode,
cohesionScore: number = 1,
domains: string[] = []
): FileClassification {
// 1. Detect barrel exports (primarily re-exports)
if (isBarrelExport(node)) {
return Classification.BARREL;
}
// 2. Detect type definition files
if (isTypeDefinition(node)) {
return Classification.TYPE_DEFINITION;
}
// 3. Detect Next.js App Router pages
if (isNextJsPage(node)) {
return Classification.NEXTJS_PAGE;
}
// 4. Detect Lambda handlers
if (isLambdaHandler(node)) {
return Classification.LAMBDA_HANDLER;
}
// 5. Detect Service files
if (isServiceFile(node)) {
return Classification.SERVICE;
}
// 6. Detect Email templates
if (isEmailTemplate(node)) {
return Classification.EMAIL_TEMPLATE;
}
// 7. Detect Parser/Transformer files
if (isParserFile(node)) {
return Classification.PARSER;
}
// 8. Detect Session/State management files
if (isSessionFile(node)) {
// If it has high cohesion, it's a cohesive module
Eif (cohesionScore >= 0.25 && domains.length <= 1)
return Classification.COHESIVE_MODULE;
return Classification.UTILITY_MODULE; // Group with utility for now
}
// 9. Detect Utility modules (multi-domain but functional purpose)
if (isUtilityModule(node)) {
return Classification.UTILITY_MODULE;
}
// 10. Detect Config/Schema files
if (isConfigFile(node)) {
return Classification.COHESIVE_MODULE;
}
// Cohesion and Domain heuristics
if (domains.length <= 1 && domains[0] !== 'unknown') {
return Classification.COHESIVE_MODULE;
}
Eif (domains.length > 1 && cohesionScore < 0.4) {
return Classification.MIXED_CONCERNS;
}
if (cohesionScore >= 0.7) {
return Classification.COHESIVE_MODULE;
}
return Classification.UNKNOWN;
}
/**
* Detect if a file is a barrel export (index.ts)
*
* @param node The dependency node to check
* @returns True if the file appears to be a barrel export
*/
export function isBarrelExport(node: DependencyNode): boolean {
const { file, exports } = node;
const fileName = file.split('/').pop()?.toLowerCase();
// Barrel files are typically named index.ts or index.js
const isIndexFile = fileName === 'index.ts' || fileName === 'index.js';
// Small file with many exports is likely a barrel
const isSmallAndManyExports =
node.tokenCost < 1000 && (exports || []).length > 5;
// RE-EXPORT HEURISTIC for non-index files
const isReexportPattern =
(exports || []).length >= 5 &&
(exports || []).every(
(e) =>
e.type === 'const' ||
e.type === 'function' ||
e.type === 'type' ||
e.type === 'interface'
);
return !!isIndexFile || !!isSmallAndManyExports || !!isReexportPattern;
}
/**
* Detect if a file is primarily type definitions
*
* @param node The dependency node to check
* @returns True if the file appears to be primarily types
*/
export function isTypeDefinition(node: DependencyNode): boolean {
const { file } = node;
// Check file extension
Iif (file.endsWith('.d.ts')) return true;
// Check if all exports are types or interfaces
const nodeExports = node.exports || [];
const hasExports = nodeExports.length > 0;
const areAllTypes =
hasExports &&
nodeExports.every((e) => e.type === 'type' || e.type === 'interface');
const allTypes: boolean = !!areAllTypes;
// Check if path includes 'types' or 'interfaces'
const isTypePath =
file.toLowerCase().includes('/types/') ||
file.toLowerCase().includes('/interfaces/') ||
file.toLowerCase().includes('/models/');
return allTypes || (isTypePath && hasExports);
}
/**
* Detect if a file is a utility module
*
* @param node The dependency node to check
* @returns True if the file appears to be a utility module
*/
export function isUtilityModule(node: DependencyNode): boolean {
const { file } = node;
// Check if path includes 'utils', 'helpers', etc.
const isUtilPath =
file.toLowerCase().includes('/utils/') ||
file.toLowerCase().includes('/helpers/') ||
file.toLowerCase().includes('/util/') ||
file.toLowerCase().includes('/helper/');
const fileName = file.split('/').pop()?.toLowerCase();
const isUtilName =
fileName?.includes('utils.') ||
fileName?.includes('helpers.') ||
fileName?.includes('util.') ||
fileName?.includes('helper.');
return !!isUtilPath || !!isUtilName;
}
/**
* Detect if a file is a Lambda/API handler
*
* @param node The dependency node to check
* @returns True if the file appears to be a Lambda handler
*/
export function isLambdaHandler(node: DependencyNode): boolean {
const { file, exports } = node;
const fileName = file.split('/').pop()?.toLowerCase();
const handlerPatterns = [
'handler',
'.handler.',
'-handler.',
'lambda',
'.lambda.',
'-lambda.',
];
const isHandlerName = handlerPatterns.some((pattern) =>
fileName?.includes(pattern)
);
const isHandlerPath =
file.toLowerCase().includes('/handlers/') ||
file.toLowerCase().includes('/lambdas/') ||
file.toLowerCase().includes('/lambda/') ||
file.toLowerCase().includes('/functions/');
const hasHandlerExport = (exports || []).some(
(e) =>
e.name.toLowerCase() === 'handler' ||
e.name.toLowerCase() === 'main' ||
e.name.toLowerCase() === 'lambdahandler' ||
e.name.toLowerCase().endsWith('handler')
);
return !!isHandlerName || !!isHandlerPath || !!hasHandlerExport;
}
/**
* Detect if a file is a service file
*
* @param node The dependency node to check
* @returns True if the file appears to be a service file
*/
export function isServiceFile(node: DependencyNode): boolean {
const { file, exports } = node;
const fileName = file.split('/').pop()?.toLowerCase();
const servicePatterns = ['service', '.service.', '-service.', '_service.'];
const isServiceName = servicePatterns.some((pattern) =>
fileName?.includes(pattern)
);
const isServicePath = file.toLowerCase().includes('/services/');
const hasServiceNamedExport = (exports || []).some(
(e) =>
e.name.toLowerCase().includes('service') ||
e.name.toLowerCase().endsWith('service')
);
const hasClassExport = (exports || []).some((e) => e.type === 'class');
return (
!!isServiceName ||
!!isServicePath ||
(!!hasServiceNamedExport && !!hasClassExport)
);
}
/**
* Detect if a file is an email template/layout
*
* @param node The dependency node to check
* @returns True if the file appears to be an email template
*/
export function isEmailTemplate(node: DependencyNode): boolean {
const { file, exports } = node;
const fileName = file.split('/').pop()?.toLowerCase();
const emailTemplatePatterns = [
'-email-',
'.email.',
'_email_',
'-template',
'.template.',
'_template',
'-mail.',
'.mail.',
];
const isEmailTemplateName = emailTemplatePatterns.some((pattern) =>
fileName?.includes(pattern)
);
const isEmailPath =
file.toLowerCase().includes('/emails/') ||
file.toLowerCase().includes('/mail/') ||
file.toLowerCase().includes('/notifications/');
const hasTemplateFunction = (exports || []).some(
(e) =>
e.type === 'function' &&
(e.name.toLowerCase().startsWith('render') ||
e.name.toLowerCase().startsWith('generate') ||
(e.name.toLowerCase().includes('template') &&
e.name.toLowerCase().includes('email')))
);
return !!isEmailPath || !!isEmailTemplateName || !!hasTemplateFunction;
}
/**
* Detect if a file is a parser/transformer
*
* @param node The dependency node to check
* @returns True if the file appears to be a parser
*/
export function isParserFile(node: DependencyNode): boolean {
const { file, exports } = node;
const fileName = file.split('/').pop()?.toLowerCase();
const parserPatterns = [
'parser',
'.parser.',
'-parser.',
'_parser.',
'transform',
'.transform.',
'converter',
'mapper',
'serializer',
];
const isParserName = parserPatterns.some((pattern) =>
fileName?.includes(pattern)
);
const isParserPath =
file.toLowerCase().includes('/parsers/') ||
file.toLowerCase().includes('/transformers/');
const hasParseFunction = (exports || []).some(
(e) =>
e.type === 'function' &&
(e.name.toLowerCase().startsWith('parse') ||
e.name.toLowerCase().startsWith('transform') ||
e.name.toLowerCase().startsWith('extract'))
);
return !!isParserName || !!isParserPath || !!hasParseFunction;
}
/**
* Detect if a file is a session/state management file
*
* @param node The dependency node to check
* @returns True if the file appears to be a session/state file
*/
export function isSessionFile(node: DependencyNode): boolean {
const { file, exports } = node;
const fileName = file.split('/').pop()?.toLowerCase();
const sessionPatterns = ['session', 'state', 'context', 'store'];
const isSessionName = sessionPatterns.some((pattern) =>
fileName?.includes(pattern)
);
const isSessionPath =
file.toLowerCase().includes('/sessions/') ||
file.toLowerCase().includes('/state/');
const hasSessionExport = (exports || []).some(
(e) =>
e.name.toLowerCase().includes('session') ||
e.name.toLowerCase().includes('state') ||
e.name.toLowerCase().includes('store')
);
return !!isSessionName || !!isSessionPath || !!hasSessionExport;
}
/**
* Detect if a file is a configuration or schema file
*
* @param node The dependency node to check
* @returns True if the file appears to be a config file
*/
export function isConfigFile(node: DependencyNode): boolean {
const { file, exports } = node;
const lowerPath = file.toLowerCase();
const fileName = file.split('/').pop()?.toLowerCase();
const configPatterns = [
'.config.',
'tsconfig',
'jest.config',
'package.json',
'aiready.json',
'next.config',
'sst.config',
];
const isConfigName = configPatterns.some((p) => fileName?.includes(p));
const isConfigPath =
lowerPath.includes('/config/') ||
lowerPath.includes('/settings/') ||
lowerPath.includes('/schemas/');
const hasSchemaExports = (exports || []).some(
(e) =>
e.name.toLowerCase().includes('schema') ||
e.name.toLowerCase().includes('config') ||
e.name.toLowerCase().includes('setting')
);
return !!isConfigName || !!isConfigPath || !!hasSchemaExports;
}
/**
* Detect if a file is a Next.js App Router page
*
* @param node The dependency node to check
* @returns True if the file appears to be a Next.js page
*/
export function isNextJsPage(node: DependencyNode): boolean {
const { file, exports } = node;
const lowerPath = file.toLowerCase();
const fileName = file.split('/').pop()?.toLowerCase();
const isInAppDir =
lowerPath.includes('/app/') || lowerPath.startsWith('app/');
const isPageFile = fileName === 'page.tsx' || fileName === 'page.ts';
if (!isInAppDir || !isPageFile) return false;
const hasDefaultExport = (exports || []).some((e) => e.type === 'default');
const nextJsExports = [
'metadata',
'generatemetadata',
'faqjsonld',
'jsonld',
'icon',
];
const hasNextJsExports = (exports || []).some((e) =>
nextJsExports.includes(e.name.toLowerCase())
);
return !!hasDefaultExport || !!hasNextJsExports;
}
/**
* Adjust cohesion score based on file classification
*
* @param baseCohesion The initial cohesion score
* @param classification The file classification
* @param node Optional dependency node for further context
* @returns The adjusted cohesion score
*/
export function adjustCohesionForClassification(
baseCohesion: number,
classification: FileClassification,
node?: DependencyNode
): number {
switch (classification) {
case Classification.BARREL:
return 1;
case Classification.TYPE_DEFINITION:
return 1;
case Classification.NEXTJS_PAGE:
return 1;
case Classification.UTILITY_MODULE: {
if (
node &&
hasRelatedExportNames(
(node.exports || []).map((e) => e.name.toLowerCase())
)
) {
return Math.max(0.8, Math.min(1, baseCohesion + 0.45));
}
return Math.max(0.75, Math.min(1, baseCohesion + 0.35));
}
case Classification.SERVICE:
return Math.max(0.72, Math.min(1, baseCohesion + 0.3));
case Classification.LAMBDA_HANDLER:
return Math.max(0.75, Math.min(1, baseCohesion + 0.35));
case Classification.EMAIL_TEMPLATE:
return Math.max(0.72, Math.min(1, baseCohesion + 0.3));
case Classification.PARSER:
return Math.max(0.7, Math.min(1, baseCohesion + 0.3));
case Classification.COHESIVE_MODULE:
return Math.max(baseCohesion, 0.7);
case Classification.MIXED_CONCERNS:
return baseCohesion;
default:
return Math.min(1, baseCohesion + 0.1);
}
}
/**
* Check if export names suggest related functionality
*
* @param exportNames List of exported names
* @returns True if names appear related
*/
function hasRelatedExportNames(exportNames: string[]): boolean {
Iif (exportNames.length < 2) return true;
const stems = new Set<string>();
const domains = new Set<string>();
const verbs = [
'get',
'set',
'create',
'update',
'delete',
'fetch',
'save',
'load',
'parse',
'format',
'validate',
];
const domainPatterns = [
'user',
'order',
'product',
'session',
'email',
'file',
'db',
'api',
'config',
];
for (const name of exportNames) {
for (const verb of verbs) {
if (name.startsWith(verb) && name.length > verb.length) {
stems.add(name.slice(verb.length).toLowerCase());
}
}
for (const domain of domainPatterns) {
Iif (name.includes(domain)) domains.add(domain);
}
}
Eif (stems.size === 1 || domains.size === 1) return true;
return false;
}
/**
* Adjust fragmentation score based on file classification
*
* @param baseFragmentation The initial fragmentation score
* @param classification The file classification
* @returns The adjusted fragmentation score
*/
export function adjustFragmentationForClassification(
baseFragmentation: number,
classification: FileClassification
): number {
switch (classification) {
case Classification.BARREL:
return 0;
case Classification.TYPE_DEFINITION:
return 0;
case Classification.UTILITY_MODULE:
case Classification.SERVICE:
case Classification.LAMBDA_HANDLER:
case Classification.EMAIL_TEMPLATE:
case Classification.PARSER:
case Classification.NEXTJS_PAGE:
return baseFragmentation * 0.2;
case Classification.COHESIVE_MODULE:
return baseFragmentation * 0.3;
case Classification.MIXED_CONCERNS:
return baseFragmentation;
default:
return baseFragmentation * 0.7;
}
}
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