veffect/dist/schema/pattern.js

powerful TypeScript validation library built on the robust foundation of Effect combining exceptional type safety, high performance, and developer experience. Taking inspiration from Effect's functional principles, VEffect delivers a balanced approach tha

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.pattern = pattern;
exports.invalid = invalid;
const E = __importStar(require("../internal/effect"));
const errors_1 = require("../errors");
/**
 * Creates a schema that validates the input based on a pattern matching function
 * The pattern function can return different schemas based on runtime inspection of the input
 *
 * @param patternFn A function that takes the input and returns an appropriate schema
 * @returns A schema that validates using dynamic schema selection based on input
 *
 * @example
 * const responseSchema = pattern(input => {
 *   if (input.status === 'success') return object({ status: literal('success'), data: any() });
 *   if (input.status === 'error') return object({ status: literal('error'), message: string() });
 *   return invalid('Unknown response type');
 * });
 */
function pattern(patternFn) {
    const schema = {
        _tag: 'PatternSchema',
        toValidator: () => ({
            validate: (input, options) => {
                // Get the appropriate schema based on the input
                const result = patternFn(input);
                // Handle case where pattern function returned an invalid result
                if (isInvalidResult(result)) {
                    return E.fail(new errors_1.CustomValidationError(result.message, options === null || options === void 0 ? void 0 : options.path));
                }
                // Validate using the returned schema
                const validator = result.toValidator();
                return validator.validate(input, options);
            },
            parse: (input) => {
                const result = E.runSync(E.either(schema.toValidator().validate(input)));
                if (E.isLeft(result)) {
                    throw result.left;
                }
                return result.right;
            },
            safeParse: (input) => {
                const result = E.runSync(E.either(schema.toValidator().validate(input)));
                if (E.isLeft(result)) {
                    return { success: false, error: result.left };
                }
                return { success: true, data: result.right };
            },
            validateAsync: async (input, options) => {
                return E.unwrapEither(E.runSync(E.either(schema.toValidator().validate(input, options))));
            }
        })
    };
    return schema;
}
/**
 * Helper to create an invalid result with custom message
 */
function invalid(message) {
    return {
        _type: 'invalid',
        message
    };
}
/**
 * Type guard for InvalidResult
 */
function isInvalidResult(value) {
    return value && value._type === 'invalid';
}