@n8n/n8n-nodes-langchain/dist/utils/agent-execution/processEventStream.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.processEventStream = processEventStream;
async function processEventStream(ctx, eventStream, itemIndex) {
    const agentResult = {
        output: '',
    };
    const toolCalls = [];
    ctx.sendChunk('begin', itemIndex);
    for await (const event of eventStream) {
        switch (event.event) {
            case 'on_chat_model_stream':
                const chunk = event.data?.chunk;
                if (chunk?.content) {
                    const chunkText = chunk.text;
                    ctx.sendChunk('item', itemIndex, chunkText);
                    agentResult.output += chunkText;
                }
                break;
            case 'on_chat_model_end':
                if (event.data) {
                    const output = event.data.output;
                    if (output?.tool_calls && output.tool_calls.length > 0) {
                        for (const toolCall of output.tool_calls) {
                            toolCalls.push({
                                tool: toolCall.name,
                                toolInput: toolCall.args,
                                toolCallId: toolCall.id || 'unknown',
                                type: toolCall.type || 'tool_call',
                                log: output.text ||
                                    `Calling ${toolCall.name} with input: ${JSON.stringify(toolCall.args)}`,
                                messageLog: [output],
                                additionalKwargs: output.additional_kwargs,
                            });
                        }
                    }
                }
                break;
            default:
                break;
        }
    }
    ctx.sendChunk('end', itemIndex);
    if (toolCalls.length > 0) {
        agentResult.toolCalls = toolCalls;
    }
    return agentResult;
}
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