81 lines
2.1 KiB
JavaScript
81 lines
2.1 KiB
JavaScript
// @flow
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import { createSelector } from 'reselect';
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import { makeSelectClaimForUri, selectClaimsByUri, makeSelectClaimsInChannelForCurrentPageState } from 'lbry-redux';
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const RECENT_HISTORY_AMOUNT = 10;
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const HISTORY_ITEMS_PER_PAGE = 50;
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export const selectState = (state: any) => state.content || {};
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export const selectPlayingUri = createSelector(
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selectState,
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state => state.playingUri
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);
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export const selectRewardContentClaimIds = createSelector(
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selectState,
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state => state.rewardedContentClaimIds
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);
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export const makeSelectContentPositionForUri = (uri: string) =>
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createSelector(
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selectState,
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makeSelectClaimForUri(uri),
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(state, claim) => {
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if (!claim) {
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return null;
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}
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const outpoint = `${claim.txid}:${claim.nout}`;
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const id = claim.claim_id;
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return state.positions[id] ? state.positions[id][outpoint] : null;
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}
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);
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export const selectHistory = createSelector(
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selectState,
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state => state.history || []
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);
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export const selectHistoryPageCount = createSelector(
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selectHistory,
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history => Math.ceil(history.length / HISTORY_ITEMS_PER_PAGE)
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);
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export const makeSelectHistoryForPage = (page: number) =>
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createSelector(
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selectHistory,
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selectClaimsByUri,
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(history, claimsByUri) => {
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const left = page * HISTORY_ITEMS_PER_PAGE;
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const historyItemsForPage = history.slice(left, left + HISTORY_ITEMS_PER_PAGE);
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return historyItemsForPage;
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}
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);
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export const makeSelectHistoryForUri = (uri: string) =>
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createSelector(
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selectHistory,
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history => history.find(i => i.uri === uri)
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);
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export const selectRecentHistory = createSelector(
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selectHistory,
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history => {
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return history.slice(0, RECENT_HISTORY_AMOUNT);
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}
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);
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export const makeSelectCategoryListUris = (uris: ?Array<string>, channel: string) =>
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createSelector(
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makeSelectClaimsInChannelForCurrentPageState(channel),
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channelClaims => {
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if (uris) return uris;
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if (channelClaims) {
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const CATEGORY_LIST_SIZE = 10;
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return channelClaims.slice(0, CATEGORY_LIST_SIZE).map(({ name, claim_id: claimId }) => `${name}#${claimId}`);
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}
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return null;
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}
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);
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