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import { Map as ImmutableMap, List as ImmutableList } from 'immutable';
import {
CONVERSATIONS_FETCH_REQUEST,
CONVERSATIONS_FETCH_SUCCESS,
CONVERSATIONS_FETCH_FAIL,
CONVERSATIONS_UPDATE,
} from '../actions/conversations';
import compareId from '../compare_id';
const initialState = ImmutableMap({
items: ImmutableList(),
isLoading: false,
hasMore: true,
});
const conversationToMap = item => ImmutableMap({
id: item.id,
accounts: ImmutableList(item.accounts.map(a => a.id)),
last_status: item.last_status.id,
});
const updateConversation = (state, item) => state.update('items', list => {
const index = list.findIndex(x => x.get('id') === item.id);
const newItem = conversationToMap(item);
if (index === -1) {
return list.unshift(newItem);
} else {
return list.set(index, newItem);
}
});
const expandNormalizedConversations = (state, conversations, next) => {
let items = ImmutableList(conversations.map(conversationToMap));
return state.withMutations(mutable => {
if (!items.isEmpty()) {
mutable.update('items', list => {
list = list.map(oldItem => {
const newItemIndex = items.findIndex(x => x.get('id') === oldItem.get('id'));
if (newItemIndex === -1) {
return oldItem;
}
const newItem = items.get(newItemIndex);
items = items.delete(newItemIndex);
return newItem;
});
list = list.concat(items);
return list.sortBy(x => x.get('last_status'), (a, b) => compareId(a, b) * -1);
});
}
if (!next) {
mutable.set('hasMore', false);
}
mutable.set('isLoading', false);
});
};
export default function conversations(state = initialState, action) {
switch (action.type) {
case CONVERSATIONS_FETCH_REQUEST:
return state.set('isLoading', true);
case CONVERSATIONS_FETCH_FAIL:
return state.set('isLoading', false);
case CONVERSATIONS_FETCH_SUCCESS:
return expandNormalizedConversations(state, action.conversations, action.next);
case CONVERSATIONS_UPDATE:
return updateConversation(state, action.conversation);
default:
return state;
}
};
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