catstodon/app/javascript/mastodon/reducers/trends.js

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import { TRENDS_FETCH_REQUEST, TRENDS_FETCH_SUCCESS, TRENDS_FETCH_FAIL } from '../actions/trends';
import { Map as ImmutableMap, List as ImmutableList, fromJS } from 'immutable';
const initialState = ImmutableMap({
items: ImmutableList(),
isLoading: false,
});
export default function trendsReducer(state = initialState, action) {
switch(action.type) {
case TRENDS_FETCH_REQUEST:
return state.set('isLoading', true);
case TRENDS_FETCH_SUCCESS:
return state.withMutations(map => {
map.set('items', fromJS(action.trends));
map.set('isLoading', false);
});
case TRENDS_FETCH_FAIL:
return state.set('isLoading', false);
default:
return state;
}
};