bigbuffet-rw/app/soapbox/reducers/conversations.ts
2022-11-15 08:58:55 -05:00

117 lines
3.3 KiB
TypeScript

import { List as ImmutableList, Record as ImmutableRecord } from 'immutable';
import {
CONVERSATIONS_MOUNT,
CONVERSATIONS_UNMOUNT,
CONVERSATIONS_FETCH_REQUEST,
CONVERSATIONS_FETCH_SUCCESS,
CONVERSATIONS_FETCH_FAIL,
CONVERSATIONS_UPDATE,
CONVERSATIONS_READ,
} from '../actions/conversations';
import { compareId } from '../utils/comparators';
import type { AnyAction } from 'redux';
import type { APIEntity } from 'soapbox/types/entities';
const ConversationRecord = ImmutableRecord({
id: '',
unread: false,
accounts: ImmutableList<string>(),
last_status: null as string | null,
});
const ReducerRecord = ImmutableRecord({
items: ImmutableList<Conversation>(),
isLoading: false,
hasMore: true,
mounted: 0,
});
type State = ReturnType<typeof ReducerRecord>;
type Conversation = ReturnType<typeof ConversationRecord>;
const conversationToMap = (item: APIEntity) => ConversationRecord({
id: item.id,
unread: item.unread,
accounts: ImmutableList(item.accounts.map((a: APIEntity) => a.id)),
last_status: item.last_status ? item.last_status.id : null,
});
const updateConversation = (state: State, item: APIEntity) => 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: State, conversations: APIEntity[], next: string | null, isLoadingRecent?: boolean) => {
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) => {
if (a === null || b === null) {
return -1;
}
return compareId(a, b) * -1;
});
});
}
if (!next && !isLoadingRecent) {
mutable.set('hasMore', false);
}
mutable.set('isLoading', false);
});
};
export default function conversations(state = ReducerRecord(), action: AnyAction) {
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, action.isLoadingRecent);
case CONVERSATIONS_UPDATE:
return updateConversation(state, action.conversation);
case CONVERSATIONS_MOUNT:
return state.update('mounted', count => count + 1);
case CONVERSATIONS_UNMOUNT:
return state.update('mounted', count => count - 1);
case CONVERSATIONS_READ:
return state.update('items', list => list.map(item => {
if (item.get('id') === action.id) {
return item.set('unread', false);
}
return item;
}));
default:
return state;
}
}