office-ui-fabric-react#find TypeScript Examples

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Example #1
Source File: ListPicker.tsx    From sp-site-designs-studio with MIT License 5 votes vote down vote up 
ListPicker = (props: IListPickerProps) => {

    const [availableLists, setAvailableLists] = useState<IList[]>([]);
    const selectedItemsRef = useRef<IDropdownOption[]>([]);

    useEffect(() => {
        // Load the lists from the specified web
        const sitesService = props.serviceScope.consume(SitesServiceKey);
        sitesService.getSiteLists(props.webUrl).then(lists => setAvailableLists(lists));
    }, [props.webUrl]);

    const getSelectedLists = () => {
        if (!selectedItemsRef.current) {
            return [];
        }

        return selectedItemsRef.current.map(option => find(availableLists, l => l.url == option.key as string));
    };

    const onChange = (ev: any, option: IDropdownOption, index: number) => {
        selectedItemsRef.current = selectedItemsRef.current.filter(s => s.key != option.key);

        if (props.multiselect && props.onListsSelected) {
            if (option.selected) {
                selectedItemsRef.current.push(option);
            } else {
                selectedItemsRef.current.splice(index, 1);
            }
            const selectedLists = getSelectedLists();
            props.onListsSelected(selectedLists);
        } else if (props.onListSelected) {

            if (option) {
                selectedItemsRef.current = [option];
            }
            const selectedLists = getSelectedLists();
            props.onListSelected(selectedLists.length > 0 ? selectedLists[0] : null);
        }
    };

    return <Dropdown
        disabled={!availableLists || (availableLists && availableLists.length == 0)}
        label={props.label}
        multiSelect={props.multiselect}
        options={availableLists.map(al => ({ key: al.url, text: al.title }))}
        onChange={onChange} />;
}