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import {
TIMELINE_UPDATE,
TIMELINE_DELETE,
TIMELINE_EXPAND_SUCCESS,
TIMELINE_EXPAND_REQUEST,
TIMELINE_EXPAND_FAIL,
TIMELINE_SCROLL_TOP,
TIMELINE_DISCONNECT,
} from 'flavours/glitch/actions/timelines';
import {
ACCOUNT_BLOCK_SUCCESS,
ACCOUNT_MUTE_SUCCESS,
ACCOUNT_UNFOLLOW_SUCCESS,
} from 'flavours/glitch/actions/accounts';
import { Map as ImmutableMap, List as ImmutableList, fromJS } from 'immutable';
import compareId from 'flavours/glitch/util/compare_id';
const initialState = ImmutableMap();
const initialTimeline = ImmutableMap({
unread: 0,
top: true,
isLoading: false,
hasMore: true,
items: ImmutableList(),
});
const expandNormalizedTimeline = (state, timeline, statuses, next, isPartial) => {
return state.update(timeline, initialTimeline, map => map.withMutations(mMap => {
mMap.set('isLoading', false);
if (!next) mMap.set('hasMore', false);
if (!statuses.isEmpty()) {
mMap.update('items', ImmutableList(), oldIds => {
const newIds = statuses.map(status => status.get('id'));
const lastIndex = oldIds.findLastIndex(id => id !== null && compareId(id, newIds.last()) >= 0) + 1;
const firstIndex = oldIds.take(lastIndex).findLastIndex(id => id !== null && compareId(id, newIds.first()) > 0);
if (firstIndex < 0) {
return (isPartial ? newIds.unshift(null) : newIds).concat(oldIds.skip(lastIndex));
}
return oldIds.take(firstIndex + 1).concat(
isPartial && oldIds.get(firstIndex) !== null ? newIds.unshift(null) : newIds,
oldIds.skip(lastIndex)
);
});
}
}));
};
const updateTimeline = (state, timeline, status) => {
const top = state.getIn([timeline, 'top']);
const ids = state.getIn([timeline, 'items'], ImmutableList());
const includesId = ids.includes(status.get('id'));
const unread = state.getIn([timeline, 'unread'], 0);
if (includesId) {
return state;
}
let newIds = ids;
return state.update(timeline, initialTimeline, map => map.withMutations(mMap => {
if (!top) mMap.set('unread', unread + 1);
if (top && ids.size > 40) newIds = newIds.take(20);
mMap.set('items', newIds.unshift(status.get('id')));
}));
};
const deleteStatus = (state, id, accountId, references) => {
state.keySeq().forEach(timeline => {
state = state.updateIn([timeline, 'items'], list => list.filterNot(item => item === id));
});
// Remove reblogs of deleted status
references.forEach(ref => {
state = deleteStatus(state, ref[0], ref[1], []);
});
return state;
};
const filterTimelines = (state, relationship, statuses) => {
let references;
statuses.forEach(status => {
if (status.get('account') !== relationship.id) {
return;
}
references = statuses.filter(item => item.get('reblog') === status.get('id')).map(item => [item.get('id'), item.get('account')]);
state = deleteStatus(state, status.get('id'), status.get('account'), references);
});
return state;
};
const filterTimeline = (timeline, state, relationship, statuses) =>
state.updateIn([timeline, 'items'], ImmutableList(), list =>
list.filterNot(statusId =>
statuses.getIn([statusId, 'account']) === relationship.id
));
const updateTop = (state, timeline, top) => {
return state.update(timeline, initialTimeline, map => map.withMutations(mMap => {
if (top) mMap.set('unread', 0);
mMap.set('top', top);
}));
};
export default function timelines(state = initialState, action) {
switch(action.type) {
case TIMELINE_EXPAND_REQUEST:
return state.update(action.timeline, initialTimeline, map => map.set('isLoading', true));
case TIMELINE_EXPAND_FAIL:
return state.update(action.timeline, initialTimeline, map => map.set('isLoading', false));
case TIMELINE_EXPAND_SUCCESS:
return expandNormalizedTimeline(state, action.timeline, fromJS(action.statuses), action.next, action.partial);
case TIMELINE_UPDATE:
return updateTimeline(state, action.timeline, fromJS(action.status));
case TIMELINE_DELETE:
return deleteStatus(state, action.id, action.accountId, action.references, action.reblogOf);
case ACCOUNT_BLOCK_SUCCESS:
case ACCOUNT_MUTE_SUCCESS:
return filterTimelines(state, action.relationship, action.statuses);
case ACCOUNT_UNFOLLOW_SUCCESS:
return filterTimeline('home', state, action.relationship, action.statuses);
case TIMELINE_SCROLL_TOP:
return updateTop(state, action.timeline, action.top);
case TIMELINE_DISCONNECT:
return state.update(
action.timeline,
initialTimeline,
map => map.update(
'items',
items => items.first() ? items.unshift(null) : items
)
);
default:
return state;
}
};
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