assistant-stream/dist/core/utils/stream/AssistantMetaTransformStream.js

Streaming utilities for AI assistants

// src/core/utils/stream/AssistantMetaTransformStream.ts
var AssistantMetaTransformStream = class extends TransformStream {
	constructor() {
		const parts = [];
		super({ transform(chunk, controller) {
			if (chunk.type === "part-start") {
				if (chunk.path.length !== 0) {
					controller.error(/* @__PURE__ */ new Error("Nested parts are not supported"));
					return;
				}
				parts.push(chunk.part);
				controller.enqueue(chunk);
				return;
			}
			if (chunk.type === "text-delta" || chunk.type === "result" || chunk.type === "part-finish" || chunk.type === "tool-call-args-text-finish" || chunk.type === "tool-call-approval") {
				if (chunk.path.length !== 1) {
					controller.error(/* @__PURE__ */ new Error(`${chunk.type} chunks must have a path of length 1`));
					return;
				}
				const idx = chunk.path[0];
				if (idx < 0 || idx >= parts.length) {
					controller.error(/* @__PURE__ */ new Error(`Invalid path index: ${idx}`));
					return;
				}
				const part = parts[idx];
				controller.enqueue({
					...chunk,
					meta: part
				});
				return;
			}
			controller.enqueue(chunk);
		} });
	}
};
export { AssistantMetaTransformStream };

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