All files / apps/timeOff/src/screens/ChooseApproversAndObservers/hooks useApproverObserverSelection.ts

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import { useCallback, useEffect, useMemo, useState } from 'react';
 
import { ROLE } from '@/constants/role';
 
import {
  useTimeOffV2ActionsSelector,
  useTimeOffV2StateSelector,
} from '../../TimeOffV2/context';
import { ChooseRole, UseApproverObserverSelectionParams } from '../types';
import {
  buildSearchEmployees,
  mapSelectedEmployees,
  resolveSearchSelectedIds,
} from '../utils';
 
import { useOnBehalfSelection } from './useOnBehalfSelection';
 
const mergeUniqueIds = (...groups: string[][]) => {
  return Array.from(new Set(groups.flat()));
};
 
const areSameIdList = (left: string[], right: string[]) => {
  Iif (left.length !== right.length) {
    return false;
  }
 
  return left.every((value, index) => value === right[index]);
};
 
const toggleIdInList = (items: string[], id: string) => {
  return items.includes(id)
    ? items.filter(item => item !== id)
    : [...items, id];
};
 
const filterExclusiveIds = ({
  availableIds,
  primarySelectedIds,
  secondarySelectedIds,
}: {
  availableIds: string[];
  primarySelectedIds: string[];
  secondarySelectedIds: string[];
}) => {
  return availableIds.filter(id => {
    return (
      primarySelectedIds.includes(id) || !secondarySelectedIds.includes(id)
    );
  });
};
 
export const useApproverObserverSelection = ({
  employees,
  extraUsers = [],
  defaultApprovers = [],
  defaultObservers = [],
}: UseApproverObserverSelectionParams) => {
  const { form, isOnBehalf } = useTimeOffV2StateSelector(state => ({
    form: state.form,
    isOnBehalf: state.isOnBehalf,
  }));
  const toggleApprover = useTimeOffV2ActionsSelector(
    actions => actions.toggleApprover,
  );
  const toggleObserver = useTimeOffV2ActionsSelector(
    actions => actions.toggleObserver,
  );
  const toggleSearch = useTimeOffV2ActionsSelector(
    actions => actions.toggleSearch,
  );
  const closeSearch = useTimeOffV2ActionsSelector(
    actions => actions.closeSearch,
  );
 
  const toggleExtraUser = useTimeOffV2ActionsSelector(
    actions => actions.toggleExtraUser,
  );
  const setIsOnBehalf = useTimeOffV2ActionsSelector(
    actions => actions.setIsOnBehalf,
  );
 
  const [role, setRole] = useState<ChooseRole | null>(null);
  const [searchValue, setSearchValue] = useState('');
  const [availableApprovers, setAvailableApprovers] = useState<string[]>(
    mergeUniqueIds(form.approvers, defaultApprovers),
  );
  const [availableObservers, setAvailableObservers] = useState<string[]>(
    mergeUniqueIds(form.observers, defaultObservers),
  );
 
  useEffect(() => {
    if (defaultApprovers.length > 0) {
      setAvailableApprovers(prev => {
        const next = mergeUniqueIds(defaultApprovers);
        return areSameIdList(prev, next) ? prev : next;
      });
    }
  }, [defaultApprovers]);
 
  useEffect(() => {
    if (defaultObservers.length > 0) {
      setAvailableObservers(prev => {
        const next = mergeUniqueIds(defaultObservers);
        return areSameIdList(prev, next) ? prev : next;
      });
    }
  }, [defaultObservers]);
 
  const openSearch = useCallback(
    (nextRole: ChooseRole) => {
      setRole(nextRole);
      setSearchValue('');
      toggleSearch();
    },
    [toggleSearch],
  );
 
  const handleSearchApprover = useCallback(() => {
    openSearch(ROLE.APPROVER);
  }, [openSearch]);
 
  const handleSearchObserver = useCallback(() => {
    openSearch(ROLE.OBSERVER);
  }, [openSearch]);
 
  const syncAvailableSelections = useCallback(
    (options?: { keepOnBehalf?: boolean }) => {
      setAvailableApprovers(prev => mergeUniqueIds(prev, form.approvers));
      setAvailableObservers(prev => mergeUniqueIds(prev, form.observers));
 
      setSearchValue('');
      setRole(null);
      closeSearch(options);
    },
    [closeSearch, form.approvers, form.observers],
  );
 
  const {
    state: { onBehalfUserSelected },
    actions: {
      setOnBehalfUserSelected,
      resetOnBehalfSelection,
      handlePressSwitchOnBehalf,
      handlePressAvatarOnBehalf,
      handleSubmitOnBehalf,
    },
  } = useOnBehalfSelection({
    requester: form.requester,
    openSearch,
    setIsOnBehalf,
    toggleExtraUser,
    syncAfterSubmit: syncAvailableSelections,
  });
 
  const handleSearchComplete = useCallback(() => {
    resetOnBehalfSelection();
    syncAvailableSelections();
  }, [resetOnBehalfSelection, syncAvailableSelections]);
 
  const hasPendingOnBehalfSelection = Boolean(onBehalfUserSelected);
  const isOnBehalfSearchMode = role === ROLE.ON_BEHALF;
 
  const handleSubmitSearchInput = useCallback(() => {
    Iif (isOnBehalfSearchMode || hasPendingOnBehalfSelection) {
      if (!form.requester && !onBehalfUserSelected) {
        return;
      }
 
      handleSubmitOnBehalf();
      return;
    }
 
    handleSearchComplete();
  }, [
    form.requester,
    hasPendingOnBehalfSelection,
    handleSearchComplete,
    handleSubmitOnBehalf,
    isOnBehalfSearchMode,
    onBehalfUserSelected,
  ]);
 
  const handleToggleAvatarInSearchMode = useCallback(
    (id: string) => {
      Iif (role === ROLE.ON_BEHALF) {
        setOnBehalfUserSelected(id);
        return;
      }
      const roleConfig =
        role === ROLE.APPROVER
          ? {
              setAvailable: setAvailableApprovers,
              toggleSelected: toggleApprover,
            }
          : role === ROLE.OBSERVER
            ? {
                setAvailable: setAvailableObservers,
                toggleSelected: toggleObserver,
              }
            : null;
 
      Iif (!roleConfig) {
        return;
      }
 
      roleConfig.setAvailable(prev => toggleIdInList(prev, id));
      roleConfig.toggleSelected(id);
    },
    [role, setOnBehalfUserSelected, toggleApprover, toggleObserver],
  );
 
  const searchSelectedIds = useMemo(
    () => resolveSearchSelectedIds(role, form.approvers, form.observers),
    [form.approvers, form.observers, role],
  );
 
  const employeesFormatted = useMemo(
    () =>
      buildSearchEmployees({
        employees: role === ROLE.ON_BEHALF ? extraUsers : employees,
        searchValue,
        role,
        approversSelected: form.approvers,
        observersSelected: form.observers,
        searchSelectedIds,
      }),
    [
      role,
      extraUsers,
      employees,
      searchValue,
      form.approvers,
      form.observers,
      searchSelectedIds,
    ],
  );
 
  const approversFormatted = useMemo(() => {
    const filtered = filterExclusiveIds({
      availableIds: availableApprovers,
      primarySelectedIds: form.approvers,
      secondarySelectedIds: form.observers,
    });
 
    return mapSelectedEmployees(filtered, employees);
  }, [availableApprovers, form.approvers, form.observers, employees]);
 
  const observersFormatted = useMemo(() => {
    const filtered = filterExclusiveIds({
      availableIds: availableObservers,
      primarySelectedIds: form.observers,
      secondarySelectedIds: form.approvers,
    });
 
    return mapSelectedEmployees(filtered, employees);
  }, [availableObservers, form.approvers, form.observers, employees]);
 
  const onBehalfUserFormatted = useMemo(() => {
    return mapSelectedEmployees([form.requester || ''], extraUsers);
  }, [form.requester, extraUsers]);
 
  const currentRoleLabel =
    role === ROLE.ON_BEHALF
      ? 'on behalf of'
      : role === ROLE.APPROVER
        ? 'approvers'
        : 'observers';
 
  return {
    state: {
      isOnBehalf,
      currentRoleLabel,
      role,
      searchValue,
      searchSelectedIds,
      employeesFormatted,
      approversFormatted,
      observersFormatted,
      onBehalfUserFormatted,
      onBehalfUserSelected,
    },
    actions: {
      setSearchValue,
      handleSearchApprover,
      handleSearchObserver,
      handleSearchComplete,
      handleToggleAvatarInSearchMode,
      handlePressSwitchOnBehalf,
      handlePressAvatarOnBehalf,
      handleSubmitSearchInput,
    },
  };
};