@langchain/langgraph
Version:
44 lines • 1.71 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const zod_1 = require("zod");
const v3_1 = require("zod/v3");
const types_1 = require("@langchain/core/utils/types");
const meta_js_1 = require("./meta.cjs");
const metaSymbol = Symbol.for("langgraph-zod");
if (!(metaSymbol in globalThis)) {
globalThis[metaSymbol] = new WeakSet();
}
function applyPluginPrototype(prototype) {
const cache = globalThis[metaSymbol];
if (cache.has(prototype)) {
return; // Already applied
}
Object.defineProperty(prototype, "langgraph", {
get() {
// Return type is any, actual type provided by module augmentation
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const zodThis = this;
return {
metadata(jsonSchemaExtra) {
return (0, meta_js_1.withLangGraph)(zodThis, { jsonSchemaExtra });
},
reducer(fn, schema) {
const defaultFn = (0, types_1.getInteropZodDefaultGetter)(zodThis);
return (0, meta_js_1.withLangGraph)(zodThis, {
default: defaultFn,
reducer: { schema, fn },
});
},
};
},
});
cache.add(prototype);
}
try {
applyPluginPrototype(v3_1.z.ZodType.prototype);
applyPluginPrototype(zod_1.z.ZodType.prototype);
}
catch (error) {
throw new Error("Failed to extend Zod with LangGraph-related methods. This is most likely a bug, consider opening an issue and/or using `withLangGraph` to augment your Zod schema.", { cause: error });
}
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