hometown/app/javascript/mastodon/reducers/status_lists.js

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import {
FAVOURITED_STATUSES_FETCH_SUCCESS,
FAVOURITED_STATUSES_EXPAND_SUCCESS,
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} from '../actions/favourites';
import { Map as ImmutableMap, List as ImmutableList } from 'immutable';
import { FAVOURITE_SUCCESS } from '../actions/interactions';
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const initialState = ImmutableMap({
favourites: ImmutableMap({
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next: null,
loaded: false,
items: ImmutableList(),
}),
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});
const normalizeList = (state, listType, statuses, next) => {
return state.update(listType, listMap => listMap.withMutations(map => {
map.set('next', next);
map.set('loaded', true);
map.set('items', ImmutableList(statuses.map(item => item.id)));
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}));
};
const appendToList = (state, listType, statuses, next) => {
return state.update(listType, listMap => listMap.withMutations(map => {
map.set('next', next);
map.set('items', map.get('items').concat(statuses.map(item => item.id)));
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}));
};
const prependOneToList = (state, listType, status) => {
return state.update(listType, listMap => listMap.withMutations(map => {
map.set('items', map.get('items').unshift(status.get('id')));
}));
};
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export default function statusLists(state = initialState, action) {
switch(action.type) {
case FAVOURITED_STATUSES_FETCH_SUCCESS:
return normalizeList(state, 'favourites', action.statuses, action.next);
case FAVOURITED_STATUSES_EXPAND_SUCCESS:
return appendToList(state, 'favourites', action.statuses, action.next);
case FAVOURITE_SUCCESS:
return prependOneToList(state, 'favourites', action.status);
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default:
return state;
}
};