sentry/static/app/utils/replays/replayDataUtils.tsx

import invariant from 'invariant';
import {duration} from 'moment-timezone';

import isValidDate from 'sentry/utils/date/isValidDate';
import getMinMax from 'sentry/utils/getMinMax';
import type {ReplayRecord} from 'sentry/views/replays/types';

const defaultValues = {
  has_viewed: false,
};

export function mapResponseToReplayRecord(apiResponse: any): ReplayRecord {
  // Marshal special fields into tags
  const user = Object.fromEntries(
    Object.entries(apiResponse.user)
      .filter(([key, value]) => key !== 'display_name' && value)
      .map(([key, value]) => [`user.${key}`, [value]])
  );
  const unorderedTags: ReplayRecord['tags'] = {
    ...apiResponse.tags,
    ...(apiResponse.browser?.name ? {'browser.name': [apiResponse.browser.name]} : {}),
    ...(apiResponse.browser?.version
      ? {'browser.version': [apiResponse.browser.version]}
      : {}),
    ...(apiResponse.device?.brand ? {'device.brand': [apiResponse.device.brand]} : {}),
    ...(apiResponse.device?.family ? {'device.family': [apiResponse.device.family]} : {}),
    ...(apiResponse.device?.model_id
      ? {'device.model_id': [apiResponse.device.model_id]}
      : {}),
    ...(apiResponse.device?.name ? {'device.name': [apiResponse.device.name]} : {}),
    ...(apiResponse.environment ? {environment: [apiResponse.environment]} : {}),
    ...(apiResponse.platform ? {platform: [apiResponse.platform]} : {}),
    ...(apiResponse.releases ? {releases: [...apiResponse.releases]} : {}),
    ...(apiResponse.replay_type ? {replayType: [apiResponse.replay_type]} : {}),
    ...(apiResponse.os?.name ? {'os.name': [apiResponse.os.name]} : {}),
    ...(apiResponse.os?.version ? {'os.version': [apiResponse.os.version]} : {}),
    ...(apiResponse.sdk?.name ? {'sdk.name': [apiResponse.sdk.name]} : {}),
    ...(apiResponse.sdk?.version ? {'sdk.version': [apiResponse.sdk.version]} : {}),
    ...user,
  };

  const startedAt = new Date(apiResponse.started_at);
  invariant(isValidDate(startedAt), 'replay.started_at is invalid');
  const finishedAt = new Date(apiResponse.finished_at);
  invariant(isValidDate(finishedAt), 'replay.finished_at is invalid');
  return {
    ...defaultValues,
    ...apiResponse,
    ...(apiResponse.started_at ? {started_at: startedAt} : {}),
    ...(apiResponse.finished_at ? {finished_at: finishedAt} : {}),
    ...(apiResponse.duration !== undefined
      ? {duration: duration(apiResponse.duration * 1000)}
      : {}),
    tags: unorderedTags,
  };
}

/**
 * We need to figure out the real start and end timestamps based on when
 * first and last bits of data were collected. In milliseconds.
 *
 * @deprecated Once the backend returns the corrected timestamps, this is not needed.
 */
export function replayTimestamps(
  replayRecord: ReplayRecord,
  rrwebEvents: {timestamp: number}[],
  rawCrumbs: {timestamp: number}[],
  rawSpanData: {endTimestamp: number; op: string; startTimestamp: number}[]
) {
  const rrwebTimestamps = rrwebEvents.map(event => event.timestamp).filter(Boolean);
  const breadcrumbTimestamps = rawCrumbs
    .map(rawCrumb => rawCrumb.timestamp)
    .filter(Boolean);
  const rawSpanDataFiltered = rawSpanData.filter(
    ({op}) => op !== 'web-vital' && op !== 'largest-contentful-paint'
  );
  const spanStartTimestamps = rawSpanDataFiltered
    .map(span => span.startTimestamp)
    .filter(Boolean);
  const spanEndTimestamps = rawSpanDataFiltered
    .map(span => span.endTimestamp)
    .filter(Boolean);

  // Calculate min/max of each array individually, to prevent extra allocations.
  // Also using `getMinMax()` so we can handle any huge arrays.
  const {min: minRRWeb, max: maxRRWeb} = getMinMax(rrwebTimestamps);
  const {min: minCrumbs, max: maxCrumbs} = getMinMax(breadcrumbTimestamps);
  const {min: minSpanStarts} = getMinMax(spanStartTimestamps);
  const {max: maxSpanEnds} = getMinMax(spanEndTimestamps);

  return {
    startTimestampMs: Math.min(
      replayRecord.started_at.getTime(),
      minRRWeb,
      minCrumbs * 1000,
      minSpanStarts * 1000
    ),
    endTimestampMs: Math.max(
      replayRecord.finished_at.getTime(),
      maxRRWeb,
      maxCrumbs * 1000,
      maxSpanEnds * 1000
    ),
  };
}