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import {
isBarrelExport,
isBoilerplateBarrel,
isTypeDefinition,
isNextJsPage,
isLambdaHandler,
isServiceFile,
isEmailTemplate,
isParserFile,
isSessionFile,
isUtilityModule,
isConfigFile,
isHubAndSpokeFile,
} from './classify/file-classifiers';
/**
* Constants for file classifications to avoid magic strings
*/
export const Classification = {
BARREL: 'barrel-export' as const,
BOILERPLATE: 'boilerplate-barrel' 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,
SPOKE_MODULE: 'spoke-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 boilerplate barrels (pure indirection/architectural theater)
if (isBoilerplateBarrel(node)) {
return Classification.BOILERPLATE;
}
// 2. Detect legitimate barrel exports (primarily re-exports that aggregate)
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;
}
// 11. Detect Spoke modules in monorepo
Iif (isHubAndSpokeFile(node)) {
return Classification.SPOKE_MODULE;
}
// Cohesion and Domain heuristics
if (domains.length <= 1 && domains[0] !== 'unknown') {
return Classification.COHESIVE_MODULE;
}
if (domains.length > 1 && cohesionScore < 0.4) {
return Classification.MIXED_CONCERNS;
}
Iif (cohesionScore >= 0.7) {
return Classification.COHESIVE_MODULE;
}
return Classification.UNKNOWN;
}
// [Split Point] Logic below this point handled by heuristics.ts
/**
* 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.BOILERPLATE:
return 0.2; // Redundant indirection is low cohesion (architectural theater)
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.SPOKE_MODULE:
return Math.max(baseCohesion, 0.6);
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.BOILERPLATE:
return baseFragmentation * 1.5; // Redundant barrels increase fragmentation
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.SPOKE_MODULE:
return baseFragmentation * 0.15; // Heavily discount intentional monorepo separation
case Classification.COHESIVE_MODULE:
return baseFragmentation * 0.3;
case Classification.MIXED_CONCERNS:
return baseFragmentation;
default:
return baseFragmentation * 0.7;
}
}
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