882 lines
36 KiB
JavaScript
882 lines
36 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.JSONSchemaGenerator = void 0;
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exports.toJSONSchema = toJSONSchema;
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const registries_js_1 = require("./registries.cjs");
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const util_js_1 = require("./util.cjs");
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class JSONSchemaGenerator {
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constructor(params) {
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this.counter = 0;
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this.metadataRegistry = params?.metadata ?? registries_js_1.globalRegistry;
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this.target = params?.target ?? "draft-2020-12";
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this.unrepresentable = params?.unrepresentable ?? "throw";
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this.override = params?.override ?? (() => { });
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this.io = params?.io ?? "output";
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this.seen = new Map();
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}
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process(schema, _params = { path: [], schemaPath: [] }) {
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var _a;
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const def = schema._zod.def;
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const formatMap = {
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guid: "uuid",
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url: "uri",
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datetime: "date-time",
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json_string: "json-string",
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regex: "", // do not set
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};
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// check for schema in seens
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const seen = this.seen.get(schema);
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if (seen) {
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seen.count++;
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// check if cycle
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const isCycle = _params.schemaPath.includes(schema);
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if (isCycle) {
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seen.cycle = _params.path;
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}
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return seen.schema;
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}
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// initialize
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const result = { schema: {}, count: 1, cycle: undefined, path: _params.path };
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this.seen.set(schema, result);
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// custom method overrides default behavior
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const overrideSchema = schema._zod.toJSONSchema?.();
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if (overrideSchema) {
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result.schema = overrideSchema;
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}
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else {
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const params = {
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..._params,
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schemaPath: [..._params.schemaPath, schema],
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path: _params.path,
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};
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const parent = schema._zod.parent;
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if (parent) {
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// schema was cloned from another schema
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result.ref = parent;
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this.process(parent, params);
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this.seen.get(parent).isParent = true;
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}
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else {
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const _json = result.schema;
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switch (def.type) {
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case "string": {
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const json = _json;
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json.type = "string";
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const { minimum, maximum, format, patterns, contentEncoding } = schema._zod
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.bag;
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if (typeof minimum === "number")
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json.minLength = minimum;
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if (typeof maximum === "number")
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json.maxLength = maximum;
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// custom pattern overrides format
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if (format) {
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json.format = formatMap[format] ?? format;
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if (json.format === "")
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delete json.format; // empty format is not valid
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}
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if (contentEncoding)
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json.contentEncoding = contentEncoding;
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if (patterns && patterns.size > 0) {
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const regexes = [...patterns];
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if (regexes.length === 1)
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json.pattern = regexes[0].source;
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else if (regexes.length > 1) {
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result.schema.allOf = [
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...regexes.map((regex) => ({
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...(this.target === "draft-7" || this.target === "draft-4" ? { type: "string" } : {}),
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pattern: regex.source,
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})),
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];
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}
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}
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break;
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}
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case "number": {
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const json = _json;
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const { minimum, maximum, format, multipleOf, exclusiveMaximum, exclusiveMinimum } = schema._zod.bag;
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if (typeof format === "string" && format.includes("int"))
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json.type = "integer";
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else
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json.type = "number";
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if (typeof exclusiveMinimum === "number") {
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if (this.target === "draft-4") {
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json.minimum = exclusiveMinimum;
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json.exclusiveMinimum = true;
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}
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else {
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json.exclusiveMinimum = exclusiveMinimum;
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}
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}
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if (typeof minimum === "number") {
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json.minimum = minimum;
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if (typeof exclusiveMinimum === "number" && this.target !== "draft-4") {
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if (exclusiveMinimum >= minimum)
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delete json.minimum;
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else
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delete json.exclusiveMinimum;
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}
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}
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if (typeof exclusiveMaximum === "number") {
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if (this.target === "draft-4") {
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json.maximum = exclusiveMaximum;
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json.exclusiveMaximum = true;
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}
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else {
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json.exclusiveMaximum = exclusiveMaximum;
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}
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}
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if (typeof maximum === "number") {
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json.maximum = maximum;
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if (typeof exclusiveMaximum === "number" && this.target !== "draft-4") {
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if (exclusiveMaximum <= maximum)
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delete json.maximum;
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else
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delete json.exclusiveMaximum;
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}
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}
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if (typeof multipleOf === "number")
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json.multipleOf = multipleOf;
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break;
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}
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case "boolean": {
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const json = _json;
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json.type = "boolean";
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break;
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}
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case "bigint": {
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if (this.unrepresentable === "throw") {
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throw new Error("BigInt cannot be represented in JSON Schema");
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}
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break;
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}
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case "symbol": {
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if (this.unrepresentable === "throw") {
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throw new Error("Symbols cannot be represented in JSON Schema");
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}
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break;
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}
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case "null": {
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_json.type = "null";
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break;
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}
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case "any": {
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break;
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}
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case "unknown": {
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break;
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}
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case "undefined": {
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if (this.unrepresentable === "throw") {
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throw new Error("Undefined cannot be represented in JSON Schema");
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}
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break;
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}
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case "void": {
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if (this.unrepresentable === "throw") {
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throw new Error("Void cannot be represented in JSON Schema");
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}
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break;
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}
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case "never": {
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_json.not = {};
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break;
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}
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case "date": {
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if (this.unrepresentable === "throw") {
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throw new Error("Date cannot be represented in JSON Schema");
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}
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break;
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}
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case "array": {
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const json = _json;
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const { minimum, maximum } = schema._zod.bag;
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if (typeof minimum === "number")
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json.minItems = minimum;
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if (typeof maximum === "number")
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json.maxItems = maximum;
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json.type = "array";
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json.items = this.process(def.element, { ...params, path: [...params.path, "items"] });
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break;
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}
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case "object": {
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const json = _json;
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json.type = "object";
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json.properties = {};
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const shape = def.shape; // params.shapeCache.get(schema)!;
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for (const key in shape) {
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json.properties[key] = this.process(shape[key], {
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...params,
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path: [...params.path, "properties", key],
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});
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}
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// required keys
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const allKeys = new Set(Object.keys(shape));
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// const optionalKeys = new Set(def.optional);
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const requiredKeys = new Set([...allKeys].filter((key) => {
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const v = def.shape[key]._zod;
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if (this.io === "input") {
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return v.optin === undefined;
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}
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else {
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return v.optout === undefined;
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}
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}));
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if (requiredKeys.size > 0) {
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json.required = Array.from(requiredKeys);
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}
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// catchall
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if (def.catchall?._zod.def.type === "never") {
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// strict
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json.additionalProperties = false;
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}
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else if (!def.catchall) {
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// regular
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if (this.io === "output")
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json.additionalProperties = false;
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}
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else if (def.catchall) {
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json.additionalProperties = this.process(def.catchall, {
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...params,
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path: [...params.path, "additionalProperties"],
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});
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}
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break;
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}
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case "union": {
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const json = _json;
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json.anyOf = def.options.map((x, i) => this.process(x, {
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...params,
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path: [...params.path, "anyOf", i],
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}));
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break;
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}
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case "intersection": {
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const json = _json;
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const a = this.process(def.left, {
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...params,
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path: [...params.path, "allOf", 0],
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});
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const b = this.process(def.right, {
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...params,
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path: [...params.path, "allOf", 1],
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});
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const isSimpleIntersection = (val) => "allOf" in val && Object.keys(val).length === 1;
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const allOf = [
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...(isSimpleIntersection(a) ? a.allOf : [a]),
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...(isSimpleIntersection(b) ? b.allOf : [b]),
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];
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json.allOf = allOf;
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break;
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}
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case "tuple": {
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const json = _json;
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json.type = "array";
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const prefixItems = def.items.map((x, i) => this.process(x, { ...params, path: [...params.path, "prefixItems", i] }));
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if (this.target === "draft-2020-12") {
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json.prefixItems = prefixItems;
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}
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else {
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json.items = prefixItems;
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}
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if (def.rest) {
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const rest = this.process(def.rest, {
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...params,
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path: [...params.path, "items"],
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});
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if (this.target === "draft-2020-12") {
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json.items = rest;
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}
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else {
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json.additionalItems = rest;
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}
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}
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// additionalItems
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if (def.rest) {
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json.items = this.process(def.rest, {
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...params,
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path: [...params.path, "items"],
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});
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}
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// length
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const { minimum, maximum } = schema._zod.bag;
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if (typeof minimum === "number")
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json.minItems = minimum;
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if (typeof maximum === "number")
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json.maxItems = maximum;
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break;
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}
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case "record": {
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const json = _json;
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json.type = "object";
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if (this.target !== "draft-4") {
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json.propertyNames = this.process(def.keyType, {
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...params,
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path: [...params.path, "propertyNames"],
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});
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}
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json.additionalProperties = this.process(def.valueType, {
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...params,
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path: [...params.path, "additionalProperties"],
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});
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break;
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}
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case "map": {
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if (this.unrepresentable === "throw") {
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throw new Error("Map cannot be represented in JSON Schema");
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}
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break;
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}
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case "set": {
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if (this.unrepresentable === "throw") {
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throw new Error("Set cannot be represented in JSON Schema");
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}
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break;
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}
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case "enum": {
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const json = _json;
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const values = (0, util_js_1.getEnumValues)(def.entries);
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// Number enums can have both string and number values
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if (values.every((v) => typeof v === "number"))
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json.type = "number";
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if (values.every((v) => typeof v === "string"))
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json.type = "string";
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json.enum = values;
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break;
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}
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case "literal": {
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const json = _json;
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const vals = [];
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for (const val of def.values) {
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if (val === undefined) {
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if (this.unrepresentable === "throw") {
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throw new Error("Literal `undefined` cannot be represented in JSON Schema");
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}
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else {
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// do not add to vals
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}
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}
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else if (typeof val === "bigint") {
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if (this.unrepresentable === "throw") {
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throw new Error("BigInt literals cannot be represented in JSON Schema");
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}
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else {
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vals.push(Number(val));
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}
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}
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else {
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vals.push(val);
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}
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}
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if (vals.length === 0) {
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// do nothing (an undefined literal was stripped)
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}
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else if (vals.length === 1) {
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const val = vals[0];
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json.type = val === null ? "null" : typeof val;
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if (this.target === "draft-4") {
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json.enum = [val];
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}
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else {
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json.const = val;
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}
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}
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else {
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if (vals.every((v) => typeof v === "number"))
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json.type = "number";
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if (vals.every((v) => typeof v === "string"))
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json.type = "string";
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if (vals.every((v) => typeof v === "boolean"))
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json.type = "string";
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if (vals.every((v) => v === null))
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json.type = "null";
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json.enum = vals;
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}
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break;
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}
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case "file": {
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const json = _json;
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const file = {
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type: "string",
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format: "binary",
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contentEncoding: "binary",
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};
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const { minimum, maximum, mime } = schema._zod.bag;
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if (minimum !== undefined)
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file.minLength = minimum;
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if (maximum !== undefined)
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file.maxLength = maximum;
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if (mime) {
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if (mime.length === 1) {
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file.contentMediaType = mime[0];
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Object.assign(json, file);
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}
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else {
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json.anyOf = mime.map((m) => {
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const mFile = { ...file, contentMediaType: m };
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return mFile;
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});
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}
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}
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else {
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Object.assign(json, file);
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}
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// if (this.unrepresentable === "throw") {
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// throw new Error("File cannot be represented in JSON Schema");
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// }
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break;
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}
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case "transform": {
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if (this.unrepresentable === "throw") {
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throw new Error("Transforms cannot be represented in JSON Schema");
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}
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break;
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}
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case "nullable": {
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const inner = this.process(def.innerType, params);
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_json.anyOf = [inner, { type: "null" }];
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break;
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}
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case "nonoptional": {
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this.process(def.innerType, params);
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result.ref = def.innerType;
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break;
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}
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case "success": {
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const json = _json;
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json.type = "boolean";
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break;
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}
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case "default": {
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this.process(def.innerType, params);
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result.ref = def.innerType;
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_json.default = JSON.parse(JSON.stringify(def.defaultValue));
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break;
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}
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case "prefault": {
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this.process(def.innerType, params);
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result.ref = def.innerType;
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if (this.io === "input")
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_json._prefault = JSON.parse(JSON.stringify(def.defaultValue));
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break;
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}
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case "catch": {
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// use conditionals
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this.process(def.innerType, params);
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result.ref = def.innerType;
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let catchValue;
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try {
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catchValue = def.catchValue(undefined);
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}
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catch {
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throw new Error("Dynamic catch values are not supported in JSON Schema");
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}
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_json.default = catchValue;
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break;
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}
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case "nan": {
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if (this.unrepresentable === "throw") {
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throw new Error("NaN cannot be represented in JSON Schema");
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}
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break;
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}
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case "template_literal": {
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const json = _json;
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const pattern = schema._zod.pattern;
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if (!pattern)
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throw new Error("Pattern not found in template literal");
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json.type = "string";
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json.pattern = pattern.source;
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break;
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}
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case "pipe": {
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const innerType = this.io === "input" ? (def.in._zod.def.type === "transform" ? def.out : def.in) : def.out;
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this.process(innerType, params);
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result.ref = innerType;
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break;
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}
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case "readonly": {
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this.process(def.innerType, params);
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result.ref = def.innerType;
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_json.readOnly = true;
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break;
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}
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// passthrough types
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case "promise": {
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this.process(def.innerType, params);
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result.ref = def.innerType;
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break;
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}
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case "optional": {
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this.process(def.innerType, params);
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result.ref = def.innerType;
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break;
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}
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case "lazy": {
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const innerType = schema._zod.innerType;
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this.process(innerType, params);
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result.ref = innerType;
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break;
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}
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case "custom": {
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if (this.unrepresentable === "throw") {
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throw new Error("Custom types cannot be represented in JSON Schema");
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}
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break;
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}
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default: {
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def;
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}
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}
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}
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}
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// metadata
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const meta = this.metadataRegistry.get(schema);
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if (meta)
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Object.assign(result.schema, meta);
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if (this.io === "input" && isTransforming(schema)) {
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// examples/defaults only apply to output type of pipe
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delete result.schema.examples;
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delete result.schema.default;
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}
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// set prefault as default
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if (this.io === "input" && result.schema._prefault)
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(_a = result.schema).default ?? (_a.default = result.schema._prefault);
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delete result.schema._prefault;
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// pulling fresh from this.seen in case it was overwritten
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const _result = this.seen.get(schema);
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return _result.schema;
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}
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emit(schema, _params) {
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const params = {
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cycles: _params?.cycles ?? "ref",
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reused: _params?.reused ?? "inline",
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// unrepresentable: _params?.unrepresentable ?? "throw",
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// uri: _params?.uri ?? ((id) => `${id}`),
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external: _params?.external ?? undefined,
|
|
};
|
|
// iterate over seen map;
|
|
const root = this.seen.get(schema);
|
|
if (!root)
|
|
throw new Error("Unprocessed schema. This is a bug in Zod.");
|
|
// initialize result with root schema fields
|
|
// Object.assign(result, seen.cached);
|
|
// returns a ref to the schema
|
|
// defId will be empty if the ref points to an external schema (or #)
|
|
const makeURI = (entry) => {
|
|
// comparing the seen objects because sometimes
|
|
// multiple schemas map to the same seen object.
|
|
// e.g. lazy
|
|
// external is configured
|
|
const defsSegment = this.target === "draft-2020-12" ? "$defs" : "definitions";
|
|
if (params.external) {
|
|
const externalId = params.external.registry.get(entry[0])?.id; // ?? "__shared";// `__schema${this.counter++}`;
|
|
// check if schema is in the external registry
|
|
const uriGenerator = params.external.uri ?? ((id) => id);
|
|
if (externalId) {
|
|
return { ref: uriGenerator(externalId) };
|
|
}
|
|
// otherwise, add to __shared
|
|
const id = entry[1].defId ?? entry[1].schema.id ?? `schema${this.counter++}`;
|
|
entry[1].defId = id; // set defId so it will be reused if needed
|
|
return { defId: id, ref: `${uriGenerator("__shared")}#/${defsSegment}/${id}` };
|
|
}
|
|
if (entry[1] === root) {
|
|
return { ref: "#" };
|
|
}
|
|
// self-contained schema
|
|
const uriPrefix = `#`;
|
|
const defUriPrefix = `${uriPrefix}/${defsSegment}/`;
|
|
const defId = entry[1].schema.id ?? `__schema${this.counter++}`;
|
|
return { defId, ref: defUriPrefix + defId };
|
|
};
|
|
// stored cached version in `def` property
|
|
// remove all properties, set $ref
|
|
const extractToDef = (entry) => {
|
|
// if the schema is already a reference, do not extract it
|
|
if (entry[1].schema.$ref) {
|
|
return;
|
|
}
|
|
const seen = entry[1];
|
|
const { ref, defId } = makeURI(entry);
|
|
seen.def = { ...seen.schema };
|
|
// defId won't be set if the schema is a reference to an external schema
|
|
if (defId)
|
|
seen.defId = defId;
|
|
// wipe away all properties except $ref
|
|
const schema = seen.schema;
|
|
for (const key in schema) {
|
|
delete schema[key];
|
|
}
|
|
schema.$ref = ref;
|
|
};
|
|
// throw on cycles
|
|
// break cycles
|
|
if (params.cycles === "throw") {
|
|
for (const entry of this.seen.entries()) {
|
|
const seen = entry[1];
|
|
if (seen.cycle) {
|
|
throw new Error("Cycle detected: " +
|
|
`#/${seen.cycle?.join("/")}/<root>` +
|
|
'\n\nSet the `cycles` parameter to `"ref"` to resolve cyclical schemas with defs.');
|
|
}
|
|
}
|
|
}
|
|
// extract schemas into $defs
|
|
for (const entry of this.seen.entries()) {
|
|
const seen = entry[1];
|
|
// convert root schema to # $ref
|
|
if (schema === entry[0]) {
|
|
extractToDef(entry); // this has special handling for the root schema
|
|
continue;
|
|
}
|
|
// extract schemas that are in the external registry
|
|
if (params.external) {
|
|
const ext = params.external.registry.get(entry[0])?.id;
|
|
if (schema !== entry[0] && ext) {
|
|
extractToDef(entry);
|
|
continue;
|
|
}
|
|
}
|
|
// extract schemas with `id` meta
|
|
const id = this.metadataRegistry.get(entry[0])?.id;
|
|
if (id) {
|
|
extractToDef(entry);
|
|
continue;
|
|
}
|
|
// break cycles
|
|
if (seen.cycle) {
|
|
// any
|
|
extractToDef(entry);
|
|
continue;
|
|
}
|
|
// extract reused schemas
|
|
if (seen.count > 1) {
|
|
if (params.reused === "ref") {
|
|
extractToDef(entry);
|
|
// biome-ignore lint:
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
// flatten _refs
|
|
const flattenRef = (zodSchema, params) => {
|
|
const seen = this.seen.get(zodSchema);
|
|
const schema = seen.def ?? seen.schema;
|
|
const _cached = { ...schema };
|
|
// already seen
|
|
if (seen.ref === null) {
|
|
return;
|
|
}
|
|
// flatten ref if defined
|
|
const ref = seen.ref;
|
|
seen.ref = null; // prevent recursion
|
|
if (ref) {
|
|
flattenRef(ref, params);
|
|
// merge referenced schema into current
|
|
const refSchema = this.seen.get(ref).schema;
|
|
if (refSchema.$ref && (params.target === "draft-7" || params.target === "draft-4")) {
|
|
schema.allOf = schema.allOf ?? [];
|
|
schema.allOf.push(refSchema);
|
|
}
|
|
else {
|
|
Object.assign(schema, refSchema);
|
|
Object.assign(schema, _cached); // prevent overwriting any fields in the original schema
|
|
}
|
|
}
|
|
// execute overrides
|
|
if (!seen.isParent)
|
|
this.override({
|
|
zodSchema: zodSchema,
|
|
jsonSchema: schema,
|
|
path: seen.path ?? [],
|
|
});
|
|
};
|
|
for (const entry of [...this.seen.entries()].reverse()) {
|
|
flattenRef(entry[0], { target: this.target });
|
|
}
|
|
const result = {};
|
|
if (this.target === "draft-2020-12") {
|
|
result.$schema = "https://json-schema.org/draft/2020-12/schema";
|
|
}
|
|
else if (this.target === "draft-7") {
|
|
result.$schema = "http://json-schema.org/draft-07/schema#";
|
|
}
|
|
else if (this.target === "draft-4") {
|
|
result.$schema = "http://json-schema.org/draft-04/schema#";
|
|
}
|
|
else {
|
|
// @ts-ignore
|
|
console.warn(`Invalid target: ${this.target}`);
|
|
}
|
|
if (params.external?.uri) {
|
|
const id = params.external.registry.get(schema)?.id;
|
|
if (!id)
|
|
throw new Error("Schema is missing an `id` property");
|
|
result.$id = params.external.uri(id);
|
|
}
|
|
Object.assign(result, root.def);
|
|
// build defs object
|
|
const defs = params.external?.defs ?? {};
|
|
for (const entry of this.seen.entries()) {
|
|
const seen = entry[1];
|
|
if (seen.def && seen.defId) {
|
|
defs[seen.defId] = seen.def;
|
|
}
|
|
}
|
|
// set definitions in result
|
|
if (params.external) {
|
|
}
|
|
else {
|
|
if (Object.keys(defs).length > 0) {
|
|
if (this.target === "draft-2020-12") {
|
|
result.$defs = defs;
|
|
}
|
|
else {
|
|
result.definitions = defs;
|
|
}
|
|
}
|
|
}
|
|
try {
|
|
// this "finalizes" this schema and ensures all cycles are removed
|
|
// each call to .emit() is functionally independent
|
|
// though the seen map is shared
|
|
return JSON.parse(JSON.stringify(result));
|
|
}
|
|
catch (_err) {
|
|
throw new Error("Error converting schema to JSON.");
|
|
}
|
|
}
|
|
}
|
|
exports.JSONSchemaGenerator = JSONSchemaGenerator;
|
|
function toJSONSchema(input, _params) {
|
|
if (input instanceof registries_js_1.$ZodRegistry) {
|
|
const gen = new JSONSchemaGenerator(_params);
|
|
const defs = {};
|
|
for (const entry of input._idmap.entries()) {
|
|
const [_, schema] = entry;
|
|
gen.process(schema);
|
|
}
|
|
const schemas = {};
|
|
const external = {
|
|
registry: input,
|
|
uri: _params?.uri,
|
|
defs,
|
|
};
|
|
for (const entry of input._idmap.entries()) {
|
|
const [key, schema] = entry;
|
|
schemas[key] = gen.emit(schema, {
|
|
..._params,
|
|
external,
|
|
});
|
|
}
|
|
if (Object.keys(defs).length > 0) {
|
|
const defsSegment = gen.target === "draft-2020-12" ? "$defs" : "definitions";
|
|
schemas.__shared = {
|
|
[defsSegment]: defs,
|
|
};
|
|
}
|
|
return { schemas };
|
|
}
|
|
const gen = new JSONSchemaGenerator(_params);
|
|
gen.process(input);
|
|
return gen.emit(input, _params);
|
|
}
|
|
function isTransforming(_schema, _ctx) {
|
|
const ctx = _ctx ?? { seen: new Set() };
|
|
if (ctx.seen.has(_schema))
|
|
return false;
|
|
ctx.seen.add(_schema);
|
|
const schema = _schema;
|
|
const def = schema._zod.def;
|
|
switch (def.type) {
|
|
case "string":
|
|
case "number":
|
|
case "bigint":
|
|
case "boolean":
|
|
case "date":
|
|
case "symbol":
|
|
case "undefined":
|
|
case "null":
|
|
case "any":
|
|
case "unknown":
|
|
case "never":
|
|
case "void":
|
|
case "literal":
|
|
case "enum":
|
|
case "nan":
|
|
case "file":
|
|
case "template_literal":
|
|
return false;
|
|
case "array": {
|
|
return isTransforming(def.element, ctx);
|
|
}
|
|
case "object": {
|
|
for (const key in def.shape) {
|
|
if (isTransforming(def.shape[key], ctx))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
case "union": {
|
|
for (const option of def.options) {
|
|
if (isTransforming(option, ctx))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
case "intersection": {
|
|
return isTransforming(def.left, ctx) || isTransforming(def.right, ctx);
|
|
}
|
|
case "tuple": {
|
|
for (const item of def.items) {
|
|
if (isTransforming(item, ctx))
|
|
return true;
|
|
}
|
|
if (def.rest && isTransforming(def.rest, ctx))
|
|
return true;
|
|
return false;
|
|
}
|
|
case "record": {
|
|
return isTransforming(def.keyType, ctx) || isTransforming(def.valueType, ctx);
|
|
}
|
|
case "map": {
|
|
return isTransforming(def.keyType, ctx) || isTransforming(def.valueType, ctx);
|
|
}
|
|
case "set": {
|
|
return isTransforming(def.valueType, ctx);
|
|
}
|
|
// inner types
|
|
case "promise":
|
|
case "optional":
|
|
case "nonoptional":
|
|
case "nullable":
|
|
case "readonly":
|
|
return isTransforming(def.innerType, ctx);
|
|
case "lazy":
|
|
return isTransforming(def.getter(), ctx);
|
|
case "default": {
|
|
return isTransforming(def.innerType, ctx);
|
|
}
|
|
case "prefault": {
|
|
return isTransforming(def.innerType, ctx);
|
|
}
|
|
case "custom": {
|
|
return false;
|
|
}
|
|
case "transform": {
|
|
return true;
|
|
}
|
|
case "pipe": {
|
|
return isTransforming(def.in, ctx) || isTransforming(def.out, ctx);
|
|
}
|
|
case "success": {
|
|
return false;
|
|
}
|
|
case "catch": {
|
|
return false;
|
|
}
|
|
default:
|
|
def;
|
|
}
|
|
throw new Error(`Unknown schema type: ${def.type}`);
|
|
}
|