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import * as ts from 'typescript';
import { computeCognitiveComplexity } from './architecture.js';
import { getFunctionName, isFunctionLike } from './ast-helpers.js';
import { collectTopLevelEffects } from './collect-effects.js';
import { collectInputSourceProfile } from './collect-input-sources.js';
import { collectPerformanceData } from './collect-performance.js';
import { collectPrototypePollutionSites } from './collect-prototype-pollution.js';
import { collectSecurityData } from './collect-security.js';
import { collectTestProfile } from './collect-test-profile.js';
import { collectMetrics, computeHalstead, computeMaintainabilityIndex, countLinesInNode } from './metrics.js';
import { TS_CONTROL_KINDS } from './types.js';
import { buildNodeTree, getLineAndCharacter, hashString, increment, isTestFile, makeFingerprint } from './utils.js';
import type {
AnalysisOptions, CodeLocation, DependencyProfile, FileCriticality, FileEntry,
FlowEntry, FlowMaps, FunctionEntry,
Location, MagicNumberEntry, Metrics, NodeBudget,
PackageFileSummary,
TreeEntry,
} from './types.js';
export { isFunctionLike, getFunctionName } from './ast-helpers.js';
export { collectMetrics, computeHalstead, computeMaintainabilityIndex, countLinesInNode } from './metrics.js';
export function buildDependencyCriticality(fileSummary: FileEntry | null, options: AnalysisOptions): FileCriticality {
if (!fileSummary || !Array.isArray(fileSummary.functions)) {
return {
file: fileSummary?.file || '<unknown>',
complexityRisk: 1,
highComplexityFunctions: 0,
functionCount: 0,
flows: 0,
score: 1,
};
}
let totalComplexity = 0;
let highComplexity = 0;
for (const fn of fileSummary.functions) {
const complexity = Number(fn.complexity) || 0;
totalComplexity += complexity;
if (complexity >= options.criticalComplexityThreshold) {
highComplexity += 1;
}
}
const flows = fileSummary.flows ? fileSummary.flows.length : 0;
const score = Math.max(
1,
Math.round(totalComplexity * 0.7 + fileSummary.functions.length * 2 + flows * 0.2),
);
return {
file: fileSummary.file,
functionCount: fileSummary.functions.length,
highComplexityFunctions: highComplexity,
flows,
complexitySum: totalComplexity,
complexityRisk: highComplexity,
score,
};
}
function countControlFlowStatements(node: ts.Node): number {
if (ts.isIfStatement(node)) {
const then = node.thenStatement;
return ts.isBlock(then) ? then.statements.length : 1;
}
if (ts.isSwitchStatement(node)) {
return node.caseBlock.clauses.length;
}
if (ts.isTryStatement(node)) {
return node.tryBlock.statements.length;
}
if (ts.isForStatement(node) || ts.isWhileStatement(node) || ts.isDoStatement(node)
|| ts.isForOfStatement(node) || ts.isForInStatement(node)) {
const stmt = node.statement;
return ts.isBlock(stmt) ? stmt.statements.length : 1;
}
return 1;
}
function makeLocationFromTs(node: ts.Node, sourceFile: ts.SourceFile, repoRoot: string): Location {
const loc = getLineAndCharacter(sourceFile, node);
return {
file: path.relative(repoRoot, node.getSourceFile().fileName),
lineStart: loc.lineStart,
lineEnd: loc.lineEnd,
columnStart: loc.columnStart,
columnEnd: loc.columnEnd,
};
}
export function analyzeSourceFile(
sourceFile: ts.SourceFile,
packageName: string,
packageFileSummary: PackageFileSummary,
options: AnalysisOptions,
maps: FlowMaps,
trees: TreeEntry[],
dependencyProfile: DependencyProfile,
): FileEntry {
const filePath = sourceFile.fileName;
const fileRelative = path.relative(options.root, filePath);
packageFileSummary.fileCount += 1;
packageFileSummary.nodeCount += 1;
packageFileSummary.kindCounts.SourceFile = (packageFileSummary.kindCounts.SourceFile || 0) + 1;
const fileEntry: FileEntry = {
package: packageName,
file: fileRelative,
parseEngine: 'typescript',
nodeCount: 0,
kindCounts: {},
functions: [],
flows: [],
dependencyProfile,
};
if (options.emitTree) {
const nodeBudget: NodeBudget = { size: 8000 };
const tree = buildNodeTree(sourceFile, sourceFile, options.treeDepth, nodeBudget);
if (tree) {
trees.push({
package: packageName,
file: fileRelative,
tree,
});
}
}
const controlKinds = TS_CONTROL_KINDS;
const emptyCatches: CodeLocation[] = [];
const switchesWithoutDefault: CodeLocation[] = [];
const magicNumbers: MagicNumberEntry[] = [];
let anyCount = 0;
const asAnyLocs: CodeLocation[] = [];
const doubleAssertionLocs: CodeLocation[] = [];
const nonNullLocs: CodeLocation[] = [];
const MAGIC_EXCLUDED = new Set([0, 1, -1, 2, 100]);
const visit = (node: ts.Node): void => {
fileEntry.nodeCount += 1;
packageFileSummary.nodeCount += 1;
const kind = ts.SyntaxKind[node.kind] || 'UNKNOWN';
fileEntry.kindCounts[kind] = (fileEntry.kindCounts[kind] || 0) + 1;
packageFileSummary.kindCounts[kind] = (packageFileSummary.kindCounts[kind] || 0) + 1;
if (ts.isCatchClause(node)) {
const block = node.block;
if (block.statements.length === 0) {
const loc = getLineAndCharacter(sourceFile, node);
emptyCatches.push({ file: fileRelative, lineStart: loc.lineStart, lineEnd: loc.lineEnd });
}
}
if (ts.isSwitchStatement(node)) {
const hasDefault = node.caseBlock.clauses.some(c => c.kind === ts.SyntaxKind.DefaultClause);
if (!hasDefault) {
const loc = getLineAndCharacter(sourceFile, node);
switchesWithoutDefault.push({ file: fileRelative, lineStart: loc.lineStart, lineEnd: loc.lineEnd });
}
}
if (node.kind === ts.SyntaxKind.AnyKeyword) {
anyCount += 1;
}
if (ts.isAsExpression(node) && node.type.kind === ts.SyntaxKind.AnyKeyword) {
anyCount += 1;
}
if (ts.isAsExpression(node)) {
if (node.type.kind === ts.SyntaxKind.AnyKeyword) {
const loc = getLineAndCharacter(sourceFile, node);
asAnyLocs.push({ file: fileRelative, lineStart: loc.lineStart, lineEnd: loc.lineEnd });
}
if (ts.isAsExpression(node.expression) && node.expression.type.kind === ts.SyntaxKind.UnknownKeyword) {
const loc = getLineAndCharacter(sourceFile, node);
doubleAssertionLocs.push({ file: fileRelative, lineStart: loc.lineStart, lineEnd: loc.lineEnd });
}
}
if (ts.isNonNullExpression(node)) {
const loc = getLineAndCharacter(sourceFile, node);
nonNullLocs.push({ file: fileRelative, lineStart: loc.lineStart, lineEnd: loc.lineEnd });
}
if (ts.isNumericLiteral(node)) {
const value = Number(node.text);
if (!MAGIC_EXCLUDED.has(value)) {
const parent = node.parent;
const inConst = parent && ts.isVariableDeclaration(parent) &&
parent.parent && ts.isVariableDeclarationList(parent.parent) &&
(parent.parent.flags & ts.NodeFlags.Const) !== 0;
const inEnum = parent && ts.isEnumMember(parent);
if (!inConst && !inEnum) {
const loc = getLineAndCharacter(sourceFile, node);
magicNumbers.push({ value, file: fileRelative, lineStart: loc.lineStart, lineEnd: loc.lineEnd });
}
}
}
if (isFunctionLike(node)) {
const funcNode = node as ts.FunctionLikeDeclaration;
const body = funcNode.body;
const statementCount = body && ts.isBlock(body) ? body.statements.length : 1;
const loc = makeLocationFromTs(node, sourceFile, options.root);
const signature = getFunctionName(node, sourceFile);
const metrics: Metrics = body ? collectMetrics(body) : {
complexity: 1,
maxBranchDepth: 0,
maxLoopDepth: 0,
returns: 0,
awaits: 0,
calls: 0,
loops: 0,
};
const entry: FunctionEntry = {
kind,
name: signature,
nameHint: signature,
file: fileRelative,
lineStart: loc.lineStart,
lineEnd: loc.lineEnd,
columnStart: loc.columnStart,
columnEnd: loc.columnEnd,
statementCount,
complexity: metrics.complexity,
maxBranchDepth: metrics.maxBranchDepth,
maxLoopDepth: metrics.maxLoopDepth,
returns: metrics.returns,
awaits: metrics.awaits,
calls: metrics.calls,
loops: metrics.loops,
lengthLines: countLinesInNode(sourceFile, node),
cognitiveComplexity: body ? computeCognitiveComplexity(body) : 0,
};
if (body) {
entry.halstead = computeHalstead(body);
entry.maintainabilityIndex = computeMaintainabilityIndex(
entry.halstead.volume,
metrics.complexity,
entry.lengthLines,
);
}
if (ts.isFunctionDeclaration(node)) {
entry.declared = true;
}
if (statementCount >= options.minFunctionStatements) {
const bodyHash = body ? makeFingerprint(body) : hashString(fileRelative);
increment(maps.flowMap, `${bodyHash}|${node.kind}`, {
...entry,
hash: bodyHash,
metrics,
});
}
if (funcNode.parameters) {
entry.params = funcNode.parameters.length;
}
fileEntry.functions.push(entry);
packageFileSummary.functions.push(entry);
packageFileSummary.functionCount += 1;
}
if (controlKinds.has(node.kind)) {
const statementCount = countControlFlowStatements(node);
const loc = makeLocationFromTs(node, sourceFile, options.root);
const flowEntry: FlowEntry = {
kind,
file: fileRelative,
lineStart: loc.lineStart,
lineEnd: loc.lineEnd,
columnStart: loc.columnStart,
columnEnd: loc.columnEnd,
statementCount,
};
fileEntry.flows.push(flowEntry);
packageFileSummary.flowCount += 1;
if (statementCount >= options.minFlowStatements) {
const flowHash = makeFingerprint(node);
increment(maps.controlMap, `${flowHash}|${node.kind}`, {
...flowEntry,
hash: flowHash,
});
}
}
ts.forEachChild(node, visit);
};
ts.forEachChild(sourceFile, visit);
fileEntry.emptyCatches = emptyCatches;
fileEntry.switchesWithoutDefault = switchesWithoutDefault;
fileEntry.anyCount = anyCount;
fileEntry.magicNumbers = magicNumbers;
fileEntry.typeAssertionEscapes = { asAny: asAnyLocs, doubleAssertion: doubleAssertionLocs, nonNull: nonNullLocs };
const asyncWithoutAwait: Array<{ name: string; lineStart: number; lineEnd: number }> = [];
const unprotectedAsync: Array<{ name: string; awaitCount: number; lineStart: number; lineEnd: number }> = [];
for (const fn of fileEntry.functions) {
if (fn.awaits === 0) continue;
const fnStart = sourceFile.getPositionOfLineAndCharacter(Math.max(0, fn.lineStart - 1), 0);
let fnAstNode: ts.Node | undefined;
const findFnNode = (node: ts.Node): void => {
if (fnAstNode) return;
if (isFunctionLike(node) && node.getStart(sourceFile) >= fnStart) {
const fnLoc = getLineAndCharacter(sourceFile, node);
if (fnLoc.lineStart === fn.lineStart) { fnAstNode = node; return; }
}
ts.forEachChild(node, findFnNode);
};
ts.forEachChild(sourceFile, findFnNode);
Iif (!fnAstNode) continue;
const isAsync = (fnAstNode as ts.FunctionLikeDeclaration).modifiers?.some((m: ts.ModifierLike) => m.kind === ts.SyntaxKind.AsyncKeyword);
Iif (!isAsync) continue;
let awaitCount = 0;
let hasTryCatch = false;
let hasCatchChain = false;
const scanBody = (child: ts.Node): void => {
if (ts.isAwaitExpression(child)) awaitCount++;
if (ts.isTryStatement(child)) hasTryCatch = true;
if (
ts.isCallExpression(child) &&
ts.isPropertyAccessExpression(child.expression) &&
child.expression.name.text === 'catch'
) {
hasCatchChain = true;
}
Iif (isFunctionLike(child) && child !== fnAstNode) return;
ts.forEachChild(child, scanBody);
};
ts.forEachChild(fnAstNode, scanBody);
if (awaitCount === 0) {
asyncWithoutAwait.push({ name: fn.name, lineStart: fn.lineStart, lineEnd: fn.lineEnd });
} else if (!hasTryCatch && !hasCatchChain) {
unprotectedAsync.push({ name: fn.name, awaitCount, lineStart: fn.lineStart, lineEnd: fn.lineEnd });
}
}
fileEntry.asyncWithoutAwait = asyncWithoutAwait;
fileEntry.unprotectedAsync = unprotectedAsync;
collectSecurityData(sourceFile, fileRelative, fileEntry);
if (!isTestFile(fileRelative)) {
collectInputSourceProfile(sourceFile, fileRelative, fileEntry);
}
collectPerformanceData(sourceFile, fileRelative, fileEntry);
if (isTestFile(fileRelative)) {
collectTestProfile(sourceFile, fileRelative, fileEntry);
}
if (!isTestFile(fileRelative)) {
const topLevelEffects = collectTopLevelEffects(sourceFile, fileRelative);
if (topLevelEffects.length > 0) {
fileEntry.topLevelEffects = topLevelEffects;
}
const ppSites = collectPrototypePollutionSites(sourceFile);
if (ppSites.length > 0) {
fileEntry.prototypePollutionSites = ppSites;
}
}
return fileEntry;
}
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