openhim-core/lib/api/metrics.js

The OpenHIM core application that provides logging and routing of http requests

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getMetrics = getMetrics;

var _winston = require('winston');

var _winston2 = _interopRequireDefault(_winston);

var _mongoose = require('mongoose');

var _mongoose2 = _interopRequireDefault(_mongoose);

var _authorisation = require('./authorisation');

var authorisation = _interopRequireWildcard(_authorisation);

var _metrics = require('../metrics');

var metrics = _interopRequireWildcard(_metrics);

var _moment = require('moment');

var _moment2 = _interopRequireDefault(_moment);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

// all in one getMetrics generator function for metrics API
async function getMetrics(ctx, groupChannels, timeSeries, channelID) {
  _winston2.default.debug(`Called getMetrics(${groupChannels}, ${timeSeries}, ${channelID})`);
  const channels = await authorisation.getUserViewableChannels(ctx.authenticated);
  let channelIDs = channels.map(c => c._id);
  if (typeof channelID === 'string') {
    if (channelIDs.map(id => id.toString()).includes(channelID)) {
      channelIDs = [_mongoose2.default.Types.ObjectId(channelID)];
    } else {
      ctx.status = 401;
      return;
    }
  }

  const query = ctx.request.query;

  if (!query.startDate || !query.endDate) {
    ctx.status = 400;
    ctx.body = 'Both start and end date are required';
    return;
  }

  const filters = {
    startDate: new Date(query.startDate),
    endDate: new Date(query.endDate),
    timeSeries,
    channels: channelIDs
  };

  const results = await metrics.calculateMetrics(filters, groupChannels);
  ctx.body = results.map(convertMetric);
}

/**
 * Convert metrics to the format expected to be returned by the API to prevent
 * breakage.
 */
function convertMetric(metric) {
  const timestamp = (0, _moment2.default)(metric.startTime);
  return {
    total: metric.requests,
    avgResp: calculateAverage(metric.responseTime, metric.requests),
    minResp: metric.minResponseTime,
    maxResp: metric.maxResponseTime,
    failed: metric.failed,
    successful: metric.successful,
    processing: metric.processing,
    completed: metric.completed,
    completedWErrors: metric.completedWithErrors,
    timestamp: metric.startTime,
    _id: {
      channelID: metric.channelID,
      minute: timestamp.minute(),
      hour: timestamp.hour(),
      day: timestamp.day(),
      week: timestamp.week(),
      month: timestamp.month(),
      year: timestamp.year()
    }
  };
}

function calculateAverage(total, count) {
  if (count === 0) {
    return 0;
  }
  return total / count;
}
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