@typescript-eslint/eslint-plugin/dist/util/baseTypeUtils.js

TypeScript plugin for ESLint

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.hasBaseTypes = hasBaseTypes;
exports.matchesTypeOrBaseType = matchesTypeOrBaseType;
const ts_api_utils_1 = require("ts-api-utils");
const tsutils = __importStar(require("ts-api-utils"));
const ts = __importStar(require("typescript"));
function getBaseTypesForType(checker, type) {
    if (!tsutils.isObjectType(type)) {
        return [];
    }
    const interfaceTarget = tsutils.isTypeReference(type) ? type.target : type;
    const interfaceType = tsutils.isObjectFlagSet(interfaceTarget, ts.ObjectFlags.Interface | ts.ObjectFlags.Class) && interfaceTarget;
    if (!interfaceType) {
        return [];
    }
    return checker.getBaseTypes(interfaceType);
}
function hasBaseTypes(type) {
    return ((0, ts_api_utils_1.isObjectType)(type) &&
        (0, ts_api_utils_1.isObjectFlagSet)(type, ts.ObjectFlags.Interface | ts.ObjectFlags.Class));
}
/**
 * Recursively checks if a type or any of its base types matches the provided
 * matcher function.
 * @param services Parser services with type information
 * @param matcher Function to test if a type matches the desired criteria
 * @param type The type to check
 * @param seen Set of already visited types to prevent infinite recursion
 * @returns `true` if the type or any of its base types match the matcher
 */
function matchesTypeOrBaseType(services, matcher, type, seen = new Set()) {
    if (seen.has(type)) {
        return false;
    }
    seen.add(type);
    if (matcher(type)) {
        return true;
    }
    const checker = services.program.getTypeChecker();
    return getBaseTypesForType(checker, type).some(base => matchesTypeOrBaseType(services, matcher, base, seen));
}