94 lines
2.5 KiB
JavaScript
94 lines
2.5 KiB
JavaScript
// @flow
|
||
import * as React from 'react';
|
||
import { observable, action } from 'mobx';
|
||
import { observer } from 'mobx-react';
|
||
import Waypoint from 'react-waypoint';
|
||
|
||
import { DEFAULT_PAGINATION_LIMIT } from 'stores/BaseStore';
|
||
import Document from 'models/Document';
|
||
import DocumentList from 'components/DocumentList';
|
||
import { ListPlaceholder } from 'components/LoadingPlaceholder';
|
||
|
||
type Props = {
|
||
documents: Document[],
|
||
fetch: (options: ?Object) => Promise<*>,
|
||
options?: Object,
|
||
heading?: React.Node,
|
||
empty?: React.Node,
|
||
};
|
||
|
||
@observer
|
||
class PaginatedDocumentList extends React.Component<Props> {
|
||
isInitiallyLoaded: boolean = false;
|
||
@observable isLoaded: boolean = false;
|
||
@observable isFetching: boolean = false;
|
||
@observable offset: number = 0;
|
||
@observable allowLoadMore: boolean = true;
|
||
|
||
componentDidMount() {
|
||
this.isInitiallyLoaded = !!this.props.documents.length;
|
||
this.fetchResults();
|
||
}
|
||
|
||
componentDidUpdate(prevProps: Props) {
|
||
if (prevProps.fetch !== this.props.fetch) {
|
||
this.fetchResults();
|
||
}
|
||
}
|
||
|
||
fetchResults = async () => {
|
||
this.isFetching = true;
|
||
|
||
const limit = DEFAULT_PAGINATION_LIMIT;
|
||
const results = await this.props.fetch({
|
||
limit,
|
||
offset: this.offset,
|
||
...this.props.options,
|
||
});
|
||
|
||
if (
|
||
results &&
|
||
(results.length === 0 || results.length < DEFAULT_PAGINATION_LIMIT)
|
||
) {
|
||
this.allowLoadMore = false;
|
||
} else {
|
||
this.offset += DEFAULT_PAGINATION_LIMIT;
|
||
}
|
||
|
||
this.isLoaded = true;
|
||
this.isFetching = false;
|
||
};
|
||
|
||
@action
|
||
loadMoreResults = async () => {
|
||
// Don't paginate if there aren't more results or we’re in the middle of fetching
|
||
if (!this.allowLoadMore || this.isFetching) return;
|
||
await this.fetchResults();
|
||
};
|
||
|
||
render() {
|
||
const { empty, heading, documents, fetch, options, ...rest } = this.props;
|
||
const showLoading = this.isFetching && !this.isInitiallyLoaded;
|
||
const showEmpty = !documents.length || showLoading;
|
||
const showList = (this.isLoaded || this.isInitiallyLoaded) && !showLoading;
|
||
|
||
return (
|
||
<React.Fragment>
|
||
{showEmpty && empty}
|
||
{showList && (
|
||
<React.Fragment>
|
||
{heading}
|
||
<DocumentList documents={documents} {...rest} />
|
||
{this.allowLoadMore && (
|
||
<Waypoint key={this.offset} onEnter={this.loadMoreResults} />
|
||
)}
|
||
</React.Fragment>
|
||
)}
|
||
{showLoading && <ListPlaceholder count={5} />}
|
||
</React.Fragment>
|
||
);
|
||
}
|
||
}
|
||
|
||
export default PaginatedDocumentList;
|