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useSeasons refactored to use reducer to keep state consistent

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This commit is contained in:
NikolaBorislavovHristov 2019-11-12 17:54:19 +02:00
parent 05f4122480
commit a851df5041
1 changed files with 60 additions and 12 deletions
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72
src/routes/Detail/VideosList/useSeasons.js
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@ -1,23 +1,71 @@
const React = require('react');
const useSeasons = (metaItem) => {
const seasons = React.useMemo(() => {
return metaItem !== null ?
metaItem.videos
const seasonsReducer = (state, action) => {
switch (action.type) {
case 'videos-changed': {
const seasons = action.videos
.map(({ season }) => season)
.filter((season, index, seasons) => {
return season !== null &&
!isNaN(season) &&
typeof season === 'number' &&
seasons.indexOf(season) === index;
})
:
[];
}, [metaItem]);
const [season, setSeason] = React.useState(seasons[0]);
});
const selectedSeason = seasons.includes(state.selectedSeason) ?
state.selectedSeason
:
seasons.length > 0 ?
seasons[0]
:
null;
return {
...state,
seasons,
selectedSeason
};
}
case 'season-changed': {
const selectedSeason = state.seasons.includes(action.season) ?
action.season
:
state.season;
return {
...state,
selectedSeason
};
}
default: {
return state;
}
}
};
const useSeasons = (metaItem) => {
const [{ selectedSeason, seasons }, dispatch] = React.useReducer(
seasonsReducer,
[metaItem],
(metaItem) => {
const videos = metaItem && Array.isArray(metaItem.videos) ? metaItem.videos : [];
return seasonsReducer({}, {
type: 'videos-changed',
videos
});
}
);
const setSeason = React.useCallback((season) => {
dispatch({
type: 'season-changed',
season
});
}, []);
React.useEffect(() => {
setSeason(seasons[0]);
}, [seasons]);
return [season, seasons, setSeason];
const videos = metaItem && Array.isArray(metaItem.videos) ? metaItem.videos : [];
dispatch({
type: 'videos-changed',
videos
});
}, [metaItem]);
return [selectedSeason, seasons, setSeason];
};
module.exports = useSeasons;