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 = _interopRequireDefault(require("winston"));

var _mongoose = _interopRequireDefault(require("mongoose"));

var authorisation = _interopRequireWildcard(require("./authorisation"));

var metrics = _interopRequireWildcard(require("../metrics"));

var _moment = _interopRequireDefault(require("moment"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } 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) {
  _winston.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 = [_mongoose.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, _moment.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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