sentry/static/app/views/discover/homepage.tsx

import {browserHistory, InjectedRouter} from 'react-router';
import {Location} from 'history';

import {Client} from 'sentry/api';
import AsyncComponent from 'sentry/components/asyncComponent';
import PageFiltersContainer from 'sentry/components/organizations/pageFilters/container';
import {
  getDatetimeFromState,
  normalizeDateTimeString,
} from 'sentry/components/organizations/pageFilters/parse';
import {getPageFilterStorage} from 'sentry/components/organizations/pageFilters/persistence';
import {Organization, PageFilters, SavedQuery} from 'sentry/types';
import EventView from 'sentry/utils/discover/eventView';
import withApi from 'sentry/utils/withApi';
import withOrganization from 'sentry/utils/withOrganization';
import withPageFilters from 'sentry/utils/withPageFilters';

import {Results} from './results';

type Props = {
  api: Client;
  loading: boolean;
  location: Location;
  organization: Organization;
  router: InjectedRouter;
  selection: PageFilters;
  setSavedQuery: (savedQuery: SavedQuery) => void;
};

type HomepageQueryState = AsyncComponent['state'] & {
  savedQuery?: SavedQuery | null;
};

class HomepageQueryAPI extends AsyncComponent<Props, HomepageQueryState> {
  shouldReload = true;

  componentDidUpdate(_, prevState) {
    const hasFetchedSavedQuery = !prevState.savedQuery && this.state.savedQuery;
    const hasInitiallyLoaded = prevState.loading && !this.state.loading;
    const sidebarClicked = this.state.savedQuery && this.props.location.search === '';
    const hasValidEventViewInURL = EventView.fromLocation(this.props.location).isValid();

    if (
      this.state.savedQuery &&
      ((hasInitiallyLoaded && hasFetchedSavedQuery && !hasValidEventViewInURL) ||
        sidebarClicked)
    ) {
      const eventView = EventView.fromSavedQuery(this.state.savedQuery);
      const pageFilterState = getPageFilterStorage(this.props.organization.slug);
      let query = {
        ...eventView.generateQueryStringObject(),
      };

      // Handle locked filters explicitly because we can't expect
      // PageFilterContainer to properly overwrite stored filters
      // when pushing the homepage query to the URL
      if (pageFilterState?.pinnedFilters) {
        pageFilterState.pinnedFilters.forEach(pinnedFilter => {
          if (pinnedFilter === 'projects') {
            query.project = pageFilterState.state.project?.map(String);
          } else if (pinnedFilter === 'datetime') {
            const {period, start, end, utc} = getDatetimeFromState(pageFilterState.state);
            query = {
              ...query,
              statsPeriod: period ?? undefined,
              utc: utc?.toString(),
              start: normalizeDateTimeString(start),
              end: normalizeDateTimeString(end),
            };
          } else {
            query[pinnedFilter] = pageFilterState.state[pinnedFilter];
          }
        });
      }

      browserHistory.replace({
        ...this.props.location,
        query,
      });
    }
  }

  getEndpoints(): ReturnType<AsyncComponent['getEndpoints']> {
    const {organization} = this.props;

    const endpoints: ReturnType<AsyncComponent['getEndpoints']> = [];
    if (organization.features.includes('discover-query')) {
      endpoints.push([
        'savedQuery',
        `/organizations/${organization.slug}/discover/homepage/`,
      ]);
    }
    return endpoints;
  }

  onRequestSuccess({stateKey, data}) {
    // No homepage query results in a 204, returning an empty string
    if (stateKey === 'savedQuery' && data === '') {
      this.setState({savedQuery: null});
    }
  }

  setSavedQuery = (newSavedQuery?: SavedQuery) => {
    this.setState({savedQuery: newSavedQuery});
  };

  renderBody(): React.ReactNode {
    const {savedQuery, loading} = this.state;
    return (
      <Results
        {...this.props}
        savedQuery={savedQuery ?? undefined}
        loading={loading}
        setSavedQuery={this.setSavedQuery}
        isHomepage
      />
    );
  }
}

function HomepageContainer(props: Props) {
  return (
    <PageFiltersContainer skipInitializeUrlParams>
      <HomepageQueryAPI {...props} />
    </PageFiltersContainer>
  );
}

export default withApi(withOrganization(withPageFilters(HomepageContainer)));