veffect/dist/schema/discriminatedUnion.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";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
            return ar;
        };
        return ownKeys(o);
    };
    return function (mod) {
        if (mod && mod.__esModule) return mod;
        var result = {};
        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
        __setModuleDefault(result, mod);
        return result;
    };
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.discriminatedUnion = discriminatedUnion;
const E = __importStar(require("../internal/effect"));
const errors_1 = require("../errors");
/**
 * Creates a discriminated union schema that validates and handles union types based on a discriminator property
 *
 * @param discriminator The property that determines which schema to use
 * @param schemas Array of object schemas that each have the discriminator property
 * @returns A schema that validates against the appropriate union member based on the discriminator
 *
 * @example
 * const userSchema = discriminatedUnion('type', [
 *   object({ type: literal('admin'), permissions: array(string()) }),
 *   object({ type: literal('user'), role: string() })
 * ]);
 */
function discriminatedUnion(discriminator, schemas) {
    // Validate that all schemas have the discriminator property
    for (const schema of schemas) {
        if (schema._tag !== 'ObjectSchema') {
            throw new Error(`All schemas in a discriminated union must be object schemas, but found: ${schema._tag}`);
        }
    }
    const schema = {
        _tag: 'DiscriminatedUnionSchema',
        toValidator: () => ({
            validate: (input, options) => {
                if (input === null || input === undefined || typeof input !== 'object' || Array.isArray(input)) {
                    return E.fail(new errors_1.TypeValidationError(`Expected an object for discriminated union`, 'object', typeof input, options === null || options === void 0 ? void 0 : options.path));
                }
                // Check if the input has the discriminator property
                const discriminatorValue = input[discriminator];
                if (discriminatorValue === undefined) {
                    return E.fail(new errors_1.TypeValidationError(`Expected object with '${discriminator}' property for discriminated union`, `object with '${discriminator}' property`, `object without '${discriminator}' property`, options === null || options === void 0 ? void 0 : options.path));
                }
                // Try each schema and collect errors
                const errors = [];
                for (const schema of schemas) {
                    const validator = schema.toValidator();
                    const result = validator.validate(input, options);
                    // Check if this schema succeeded with the input
                    const resultEither = E.runSync(E.either(result));
                    if (E.isRight(resultEither)) {
                        return result; // Found a matching schema
                    }
                    else {
                        errors.push(resultEither.left);
                    }
                }
                // If we get here, none of the schemas matched
                return E.fail(new errors_1.UnionValidationError(`No schema matched for discriminated union with '${discriminator}' value: ${discriminatorValue}`, errors, options === null || options === void 0 ? void 0 : options.path));
            },
            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;
}