90 lines
2.2 KiB
TypeScript
90 lines
2.2 KiB
TypeScript
const A2UI_ACTION_KEYS = [
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"beginRendering",
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"surfaceUpdate",
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"dataModelUpdate",
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"deleteSurface",
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"createSurface",
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] as const;
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export type A2UIVersion = "v0.8" | "v0.9";
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export function buildA2UITextJsonl(text: string) {
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const surfaceId = "main";
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const rootId = "root";
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const textId = "text";
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const payloads = [
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{
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surfaceUpdate: {
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surfaceId,
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components: [
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{
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id: rootId,
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component: { Column: { children: { explicitList: [textId] } } },
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},
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{
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id: textId,
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component: {
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Text: { text: { literalString: text }, usageHint: "body" },
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},
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},
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],
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},
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},
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{ beginRendering: { surfaceId, root: rootId } },
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];
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return payloads.map((payload) => JSON.stringify(payload)).join("\n");
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}
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export function validateA2UIJsonl(jsonl: string) {
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const lines = jsonl.split(/\r?\n/);
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const errors: string[] = [];
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let sawV08 = false;
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let sawV09 = false;
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let messageCount = 0;
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lines.forEach((line, idx) => {
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const trimmed = line.trim();
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if (!trimmed) return;
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messageCount += 1;
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let obj: unknown;
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try {
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obj = JSON.parse(trimmed) as unknown;
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} catch (err) {
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errors.push(`line ${idx + 1}: ${String(err)}`);
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return;
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}
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if (!obj || typeof obj !== "object" || Array.isArray(obj)) {
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errors.push(`line ${idx + 1}: expected JSON object`);
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return;
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}
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const record = obj as Record<string, unknown>;
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const actionKeys = A2UI_ACTION_KEYS.filter((key) => key in record);
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if (actionKeys.length !== 1) {
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errors.push(
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`line ${idx + 1}: expected exactly one action key (${A2UI_ACTION_KEYS.join(
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", ",
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)})`,
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);
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return;
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}
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if (actionKeys[0] === "createSurface") {
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sawV09 = true;
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} else {
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sawV08 = true;
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}
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});
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if (messageCount === 0) {
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errors.push("no JSONL messages found");
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}
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if (sawV08 && sawV09) {
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errors.push("mixed A2UI v0.8 and v0.9 messages in one file");
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}
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if (errors.length > 0) {
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throw new Error(`Invalid A2UI JSONL:\n- ${errors.join("\n- ")}`);
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}
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const version: A2UIVersion = sawV09 ? "v0.9" : "v0.8";
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return { version, messageCount };
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}
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