resolve-runtime/es/handlers/view_model_handler.js

This package create server with resolve.

import extractErrorHttpCode from '../utils/extract_error_http_code';
import message from '../message';

const viewModelHandler = async (req, res) => {
  try {
    const executeQuery = req.resolve.executeQuery;
    const modelName = req.params.modelName;
    const aggregateIds = req.params.modelOptions !== '*' ? req.params.modelOptions.split(/,/) : '*';
    const aggregateArgs = req.arguments;
    const jwtToken = req.jwtToken;

    if (aggregateIds !== '*' && (!Array.isArray(aggregateIds) || aggregateIds.length === 0)) {
      resolveLog('warn', 'View model handler wrong aggregate ids parameter', req.path, aggregateIds);
      throw new Error(message.viewModelOnlyOnDemand);
    }

    const serializedState = await executeQuery.readAndSerialize({
      modelName,
      aggregateIds,
      aggregateArgs,
      jwtToken
    });
    const lastError = await executeQuery.getLastError({
      modelName,
      aggregateIds
    });

    if (lastError != null) {
      resolveLog('warn', 'View model handler caused error', req.path, lastError);
      throw lastError;
    }

    await res.status(200);
    await res.setHeader('Content-Type', 'text/plain');
    await res.end(serializedState);
    resolveLog('debug', 'View model handler successful', req.path);
  } catch (err) {
    const errorCode = extractErrorHttpCode(err);
    await res.status(errorCode);
    await res.setHeader('Content-Type', 'text/plain');
    await res.end(`${message.viewModelFail}${err.message}`);
    resolveLog('error', 'View model handler failure', err);
  }
};

export default viewModelHandler;
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