lbry-desktop/ui/redux/selectors/rewards.js

import { createSelector } from 'reselect';
import REWARDS from 'rewards';

const selectState = state => state.rewards || {};

export const selectUnclaimedRewardsByType = createSelector(selectState, state => state.unclaimedRewardsByType);

export const selectClaimedRewardsById = createSelector(selectState, state => state.claimedRewardsById);

export const selectClaimedRewards = createSelector(selectClaimedRewardsById, byId => Object.values(byId) || []);

export const selectClaimedRewardsByTransactionId = createSelector(selectClaimedRewards, rewards =>
  rewards.reduce((mapParam, reward) => {
    const map = mapParam;
    map[reward.transaction_id] = reward;
    return map;
  }, {})
);

export const selectUnclaimedRewards = createSelector(selectState, state => state.unclaimedRewards);

export const selectFetchingRewards = createSelector(selectState, state => !!state.fetching);

export const selectUnclaimedRewardValue = createSelector(selectUnclaimedRewards, rewards =>
  rewards.reduce((sum, reward) => sum + reward.reward_amount, 0)
);

export const selectClaimsPendingByType = createSelector(selectState, state => state.claimPendingByType);

const selectIsClaimRewardPending = (state, props) => selectClaimsPendingByType(state, props)[props.reward_type];

export const makeSelectIsRewardClaimPending = () =>
  createSelector(selectIsClaimRewardPending, isClaiming => isClaiming);

export const selectClaimErrorsByType = createSelector(selectState, state => state.claimErrorsByType);

const selectClaimRewardError = (state, props) => selectClaimErrorsByType(state, props)[props.reward_type];

export const makeSelectClaimRewardError = () => createSelector(selectClaimRewardError, errorMessage => errorMessage);

const selectRewardByType = (state, rewardType) =>
  selectUnclaimedRewards(state).find(reward => reward.reward_type === rewardType);

export const makeSelectRewardByType = () => createSelector(selectRewardByType, reward => reward);

const selectRewardByClaimCode = (state, claimCode) =>
  selectUnclaimedRewards(state).find(reward => reward.claim_code === claimCode);

export const makeSelectRewardByClaimCode = () => createSelector(selectRewardByClaimCode, reward => reward);

export const makeSelectRewardAmountByType = () =>
  createSelector(selectRewardByType, reward => (reward ? reward.reward_amount : 0));

export const selectRewardContentClaimIds = createSelector(selectState, state => state.rewardedContentClaimIds);

export const selectReferralReward = createSelector(
  selectUnclaimedRewards,
  unclaimedRewards => unclaimedRewards.filter(reward => reward.reward_type === REWARDS.TYPE_REFERRAL)[0]
);

export const selectHasUnclaimedRefereeReward = createSelector(selectUnclaimedRewards, unclaimedRewards =>
  unclaimedRewards.some(reward => reward.reward_type === REWARDS.TYPE_REFEREE)
);