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import {
BARREL_EXPORT_MIN_EXPORTS,
BARREL_EXPORT_TOKEN_LIMIT,
HANDLER_NAME_PATTERNS,
SERVICE_NAME_PATTERNS,
EMAIL_NAME_PATTERNS,
PARSER_NAME_PATTERNS,
SESSION_NAME_PATTERNS,
NEXTJS_METADATA_EXPORTS,
CONFIG_NAME_PATTERNS,
} from './classification-patterns';
/**
* Detect if a file is a boilerplate barrel (architectural theater).
* A boilerplate barrel re-exports from other sources without adding value.
*
* @param node - The dependency node to analyze.
* @returns True if the file matches boilerplate barrel patterns.
*/
export function isBoilerplateBarrel(node: DependencyNode): boolean {
const { exports, tokenCost } = node;
Iif (!exports || exports.length === 0) return false;
// 1. Must be purely re-exports
const isPurelyReexports = exports.every((exp: any) => !!exp.source);
if (!isPurelyReexports) return false;
// 2. Must be low local token cost (no actual logic)
Iif (tokenCost > 500) return false;
// 3. Detect "Architectural Theater"
// If it re-exports everything from exactly ONE source, it's a pass-through
const sources = new Set(exports.map((exp: any) => exp.source));
// Pattern: export * from '../actual'
const isSingleSourcePassThrough = sources.size === 1;
// Pattern: multi-file 1-to-1 re-exports that don't aggregate much
// (e.g., 6 files each re-exporting from exactly one other file)
const isMeaninglessAggregation = sources.size > 0 && sources.size < 3;
return isSingleSourcePassThrough || isMeaninglessAggregation;
}
/**
* Detect if a file is a barrel export (index.ts).
*
* @param node - The dependency node to analyze.
* @returns True if the file matches barrel export patterns.
* @lastUpdated 2026-03-20
*/
export function isBarrelExport(node: DependencyNode): boolean {
Iif (isBoilerplateBarrel(node)) return false; // Already handled by more specific check
const { file, exports } = node;
const fileName = file.split('/').pop()?.toLowerCase();
const isIndexFile = fileName === 'index.ts' || fileName === 'index.js';
const isSmallAndManyExports =
node.tokenCost < BARREL_EXPORT_TOKEN_LIMIT &&
(exports || []).length > BARREL_EXPORT_MIN_EXPORTS;
const isReexportPattern =
(exports || []).length >= BARREL_EXPORT_MIN_EXPORTS &&
(exports || []).every((exp: any) =>
['const', 'function', 'type', 'interface'].includes(exp.type)
);
return !!isIndexFile || !!isSmallAndManyExports || !!isReexportPattern;
}
/**
* Detect if a file is primarily type definitions.
*
* @param node - The dependency node to analyze.
* @returns True if the file contains primarily types or matches type paths.
* @lastUpdated 2026-03-18
*/
export function isTypeDefinition(node: DependencyNode): boolean {
const { file } = node;
Iif (file.endsWith('.d.ts')) return true;
const nodeExports = node.exports || [];
const hasExports = nodeExports.length > 0;
const areAllTypes =
hasExports &&
nodeExports.every(
(exp: any) => exp.type === 'type' || exp.type === 'interface'
);
const isTypePath = /\/(types|interfaces|models)\//i.test(file);
return !!areAllTypes || (isTypePath && hasExports);
}
/**
* Detect if a file is a utility module.
*
* @param node - The dependency node to analyze.
* @returns True if the file path or name suggests a utility/helper role.
* @lastUpdated 2026-03-18
*/
export function isUtilityModule(node: DependencyNode): boolean {
const { file } = node;
const isUtilPath = /\/(utils|helpers|util|helper)\//i.test(file);
const fileName = file.split('/').pop()?.toLowerCase() || '';
const isUtilName = /(utils\.|helpers\.|util\.|helper\.)/i.test(fileName);
return isUtilPath || isUtilName;
}
/**
* Detect if a file is a Lambda/API handler.
*
* @param node - The dependency node to analyze.
* @returns True if the file serves as a coordination point for requests/lambdas.
* @lastUpdated 2026-03-18
*/
export function isLambdaHandler(node: DependencyNode): boolean {
const { file, exports } = node;
const fileName = file.split('/').pop()?.toLowerCase() || '';
const isHandlerName = HANDLER_NAME_PATTERNS.some((pattern: string) =>
fileName.includes(pattern)
);
const isHandlerPath = /\/(handlers|lambdas|lambda|functions)\//i.test(file);
const hasHandlerExport = (exports || []).some(
(exp: any) =>
['handler', 'main', 'lambdahandler'].includes(exp.name.toLowerCase()) ||
exp.name.toLowerCase().endsWith('handler')
);
return isHandlerName || isHandlerPath || hasHandlerExport;
}
/**
* Detect if a file is a service file.
*
* @param node - The dependency node to analyze.
* @returns True if the file orchestrates logic or matches service patterns.
* @lastUpdated 2026-03-18
*/
export function isServiceFile(node: DependencyNode): boolean {
const { file, exports } = node;
const fileName = file.split('/').pop()?.toLowerCase() || '';
const isServiceName = SERVICE_NAME_PATTERNS.some((pattern: string) =>
fileName.includes(pattern)
);
const isServicePath = file.toLowerCase().includes('/services/');
const hasServiceNamedExport = (exports || []).some((exp: any) =>
exp.name.toLowerCase().includes('service')
);
const hasClassExport = (exports || []).some(
(exp: any) => exp.type === 'class'
);
return (
isServiceName || isServicePath || (hasServiceNamedExport && hasClassExport)
);
}
/**
* Detect if a file is an email template/layout.
*
* @param node - The dependency node to analyze.
* @returns True if the file is used for rendering notifications or emails.
* @lastUpdated 2026-03-18
*/
export function isEmailTemplate(node: DependencyNode): boolean {
const { file, exports } = node;
const fileName = file.split('/').pop()?.toLowerCase() || '';
const isEmailName = EMAIL_NAME_PATTERNS.some((pattern: string) =>
fileName.includes(pattern)
);
const isEmailPath = /\/(emails|mail|notifications)\//i.test(file);
const hasTemplateFunction = (exports || []).some(
(exp: any) =>
exp.type === 'function' &&
(exp.name.toLowerCase().startsWith('render') ||
exp.name.toLowerCase().startsWith('generate'))
);
return isEmailPath || isEmailName || hasTemplateFunction;
}
/**
* Detect if a file is a parser/transformer.
*
* @param node - The dependency node to analyze.
* @returns True if the file handles data conversion or serialization.
* @lastUpdated 2026-03-18
*/
export function isParserFile(node: DependencyNode): boolean {
const { file, exports } = node;
const fileName = file.split('/').pop()?.toLowerCase() || '';
const isParserName = PARSER_NAME_PATTERNS.some((pattern: string) =>
fileName.includes(pattern)
);
const isParserPath = /\/(parsers|transformers)\//i.test(file);
const hasParseFunction = (exports || []).some(
(exp: any) =>
exp.type === 'function' &&
(exp.name.toLowerCase().startsWith('parse') ||
exp.name.toLowerCase().startsWith('transform'))
);
return isParserName || isParserPath || hasParseFunction;
}
/**
* Detect if a file is a session/state management file.
*
* @param node - The dependency node to analyze.
* @returns True if the file manages application state or sessions.
* @lastUpdated 2026-03-18
*/
export function isSessionFile(node: DependencyNode): boolean {
const { file, exports } = node;
const fileName = file.split('/').pop()?.toLowerCase() || '';
const isSessionName = SESSION_NAME_PATTERNS.some((pattern: string) =>
fileName.includes(pattern)
);
const isSessionPath = /\/(sessions|state)\//i.test(file);
const hasSessionExport = (exports || []).some((exp: any) =>
['session', 'state', 'store'].some((pattern: string) =>
exp.name.toLowerCase().includes(pattern)
)
);
return isSessionName || isSessionPath || hasSessionExport;
}
/**
* Detect if a file is a Next.js App Router page.
*
* @param node - The dependency node to analyze.
* @returns True if the file is a Next.js page or metadata entry.
* @lastUpdated 2026-03-18
*/
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/');
if (!isInAppDir || (fileName !== 'page.tsx' && fileName !== 'page.ts'))
return false;
const hasDefaultExport = (exports || []).some(
(exp: any) => exp.type === 'default'
);
const hasNextJsExport = (exports || []).some((exp: any) =>
NEXTJS_METADATA_EXPORTS.includes(exp.name.toLowerCase())
);
return hasDefaultExport || hasNextJsExport;
}
/**
* Detect if a file is a configuration or schema file.
*
* @param node - The dependency node to analyze.
* @returns True if the file matches configuration, setting, or schema patterns.
* @lastUpdated 2026-03-18
*/
export function isConfigFile(node: DependencyNode): boolean {
const { file, exports } = node;
const lowerPath = file.toLowerCase();
const fileName = file.split('/').pop()?.toLowerCase() || '';
const isConfigName = CONFIG_NAME_PATTERNS.some((pattern: string) =>
fileName.includes(pattern)
);
const isConfigPath = /\/(config|settings|schemas)\//i.test(lowerPath);
const hasSchemaExport = (exports || []).some((exp: any) =>
['schema', 'config', 'setting'].some((pattern: string) =>
exp.name.toLowerCase().includes(pattern)
)
);
return isConfigName || isConfigPath || hasSchemaExport;
}
/**
* Detect if a file is part of a hub-and-spoke monorepo architecture.
*
* Many files spread across multiple packages (spokes) is intentional in
* AIReady and shouldn't be penalized as heavily for fragmentation.
*
* @param node - The dependency node to analyze.
* @returns True if the file path suggests it belongs to a spoke package.
*/
export function isHubAndSpokeFile(node: DependencyNode): boolean {
const { file } = node;
return /\/packages\/[a-zA-Z0-9-]+\/src\//.test(file);
}
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