Function handler

apps/api/src/controllers/track.controller.ts:388–456

(
  request: FastifyRequest<{
    Body: ITrackHandlerPayload;
  }>,
  reply: FastifyReply
)

}

export async function handler(
  request: FastifyRequest<{
    Body: ITrackHandlerPayload;
  }>,
  reply: FastifyReply
) {
  const validatedBody = request.body;

  // Handle alias (not supported)
  if (validatedBody.type === 'alias') {
    return reply.status(400).send({
      status: 400,
      error: 'Bad Request',
      message: 'Alias is not supported',
    });
  }

  // Build request context
  const context = await buildContext(request, validatedBody);

  // Dispatch to appropriate handler
  switch (validatedBody.type) {
    case 'track':
      await handleTrack(validatedBody.payload, context);
      break;
    case 'identify':
      await handleIdentify(validatedBody.payload, context);
      break;
    case 'increment':
      await handleIncrement(validatedBody.payload, context);
      break;
    case 'decrement':
      await handleDecrement(validatedBody.payload, context);
      break;
    case 'replay': {
      // BACKCOMPAT(replay-sessionid): TEMPORARY legacy branch, remove when new SDK is fully deployed
      if (!validatedBody.payload.sessionId) {
        await handleReplay(validatedBody.payload, {
          projectId: context.projectId,
          sessionId: context.sessionId,
        });
        break;
      }

      await handleReplay(validatedBody.payload, {
        projectId: context.projectId,
        sessionId: validatedBody.payload.sessionId,
      });
      break;
    }
    case 'group':
      await handleGroup(validatedBody.payload, context);
      break;
    case 'assign_group':
      await handleAssignGroup(validatedBody.payload, context);
      break;
    default:
      return reply.status(400).send({