refakts/dist/locators/variable-node-matcher.js

TypeScript refactoring tool built for AI coding agents to perform precise refactoring operations via command line instead of requiring complete code regeneration.

"use strict";
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    Object.defineProperty(o, "default", { enumerable: true, value: v });
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var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
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Object.defineProperty(exports, "__esModule", { value: true });
exports.VariableNodeMatcher = void 0;
const ts = __importStar(require("typescript"));
const source_file_helper_1 = require("./source-file-helper");
const shadowing_detector_1 = require("./shadowing-detector");
class VariableNodeMatcher {
    constructor() {
        this.shadowingDetector = new shadowing_detector_1.ShadowingDetector();
    }
    findDeclaration(sourceFile, variableName) {
        return source_file_helper_1.SourceFileHelper.findDescendant(sourceFile, node => this.isMatchingDeclaration(node, variableName));
    }
    findUsages(sourceFile, variableName, declaration) {
        const usages = [];
        const declarationIdentifier = this.getDeclarationIdentifier(declaration);
        this.collectUsages(sourceFile, usages, variableName, declarationIdentifier, declaration);
        return usages;
    }
    collectUsages(sourceFile, usages, variableName, declarationIdentifier, declaration) {
        sourceFile.forEachDescendant((node) => {
            if (this.isValidUsage(node, variableName, declarationIdentifier, declaration)) {
                usages.push(node);
            }
        });
    }
    getVariableName(declaration) {
        const identifier = declaration.getFirstDescendantByKind(ts.SyntaxKind.Identifier);
        if (!identifier) {
            throw new Error('Declaration node does not contain an identifier');
        }
        return identifier.getText();
    }
    isMatchingDeclaration(node, variableName) {
        return this.isVariableDeclaration(node, variableName) ||
            this.isParameterDeclaration(node, variableName);
    }
    isVariableDeclaration(node, variableName) {
        return node.getKind() === ts.SyntaxKind.VariableDeclaration &&
            this.hasMatchingIdentifier(node, variableName);
    }
    isParameterDeclaration(node, variableName) {
        return node.getKind() === ts.SyntaxKind.Parameter &&
            this.hasMatchingIdentifier(node, variableName);
    }
    hasMatchingIdentifier(node, variableName) {
        const identifier = node.getFirstDescendantByKind(ts.SyntaxKind.Identifier);
        return identifier?.getText() === variableName;
    }
    isValidUsage(node, variableName, declarationIdentifier, declaration) {
        return this.isUsageNode(node, variableName, declarationIdentifier) &&
            this.shadowingDetector.isUsageInScope(node, declaration);
    }
    getDeclarationIdentifier(declaration) {
        return declaration.getFirstDescendantByKind(ts.SyntaxKind.Identifier);
    }
    isUsageNode(node, variableName, declarationIdentifier) {
        return node.getKind() === ts.SyntaxKind.Identifier &&
            node.getText() === variableName &&
            node !== declarationIdentifier;
    }
}
exports.VariableNodeMatcher = VariableNodeMatcher;
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