@langchain/langgraph/dist/channels/binop.js

LangGraph

import { EmptyChannelError } from "../errors.js";
import { BaseChannel } from "./base.js";

//#region src/channels/binop.ts
/**
* Stores the result of applying a binary operator to the current value and each new value.
*/
var BinaryOperatorAggregate = class BinaryOperatorAggregate extends BaseChannel {
	lc_graph_name = "BinaryOperatorAggregate";
	value;
	operator;
	initialValueFactory;
	constructor(operator, initialValueFactory) {
		super();
		this.operator = operator;
		this.initialValueFactory = initialValueFactory;
		this.value = initialValueFactory?.();
	}
	fromCheckpoint(checkpoint) {
		const empty = new BinaryOperatorAggregate(this.operator, this.initialValueFactory);
		if (typeof checkpoint !== "undefined") empty.value = checkpoint;
		return empty;
	}
	update(values) {
		let newValues = values;
		if (!newValues.length) return false;
		if (this.value === void 0) {
			[this.value] = newValues;
			newValues = newValues.slice(1);
		}
		for (const value of newValues) if (this.value !== void 0) this.value = this.operator(this.value, value);
		return true;
	}
	get() {
		if (this.value === void 0) throw new EmptyChannelError();
		return this.value;
	}
	checkpoint() {
		if (this.value === void 0) throw new EmptyChannelError();
		return this.value;
	}
	isAvailable() {
		return this.value !== void 0;
	}
};

//#endregion
export { BinaryOperatorAggregate };
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