@langchain/core/dist/utils/zod-to-json-schema/parseDef.js

Core LangChain.js abstractions and schemas

import { ignoreOverride } from "./Options.js";
import { getRelativePath } from "./getRelativePath.js";
import { parseAnyDef } from "./parsers/any.js";
import { selectParser } from "./selectParser.js";

//#region src/utils/zod-to-json-schema/parseDef.ts
function parseDef(def, refs, forceResolution = false) {
	const seenItem = refs.seen.get(def);
	if (refs.override) {
		const overrideResult = refs.override?.(def, refs, seenItem, forceResolution);
		if (overrideResult !== ignoreOverride) return overrideResult;
	}
	if (seenItem && !forceResolution) {
		const seenSchema = get$ref(seenItem, refs);
		if (seenSchema !== void 0) return seenSchema;
	}
	const newItem = {
		def,
		path: refs.currentPath,
		jsonSchema: void 0
	};
	refs.seen.set(def, newItem);
	const jsonSchemaOrGetter = selectParser(def, def.typeName, refs);
	const jsonSchema = typeof jsonSchemaOrGetter === "function" ? parseDef(jsonSchemaOrGetter(), refs) : jsonSchemaOrGetter;
	if (jsonSchema) addMeta(def, refs, jsonSchema);
	if (refs.postProcess) {
		const postProcessResult = refs.postProcess(jsonSchema, def, refs);
		newItem.jsonSchema = jsonSchema;
		return postProcessResult;
	}
	newItem.jsonSchema = jsonSchema;
	return jsonSchema;
}
const get$ref = (item, refs) => {
	switch (refs.$refStrategy) {
		case "root": return { $ref: item.path.join("/") };
		case "relative": return { $ref: getRelativePath(refs.currentPath, item.path) };
		case "none":
		case "seen":
			if (item.path.length < refs.currentPath.length && item.path.every((value, index) => refs.currentPath[index] === value)) {
				console.warn(`Recursive reference detected at ${refs.currentPath.join("/")}! Defaulting to any`);
				return parseAnyDef(refs);
			}
			return refs.$refStrategy === "seen" ? parseAnyDef(refs) : void 0;
	}
};
const addMeta = (def, refs, jsonSchema) => {
	if (def.description) {
		jsonSchema.description = def.description;
		if (refs.markdownDescription) jsonSchema.markdownDescription = def.description;
	}
	return jsonSchema;
};

//#endregion
export { parseDef };
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