Babylon.js/inspector/src/components/actionTabs/lineContainerComponent.tsx

import * as React from "react";
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import { faChevronDown } from '@fortawesome/free-solid-svg-icons';

interface ILineContainerComponentProps {
    title: string,
    children: any[] | any,
    closed?: boolean
}

export class LineContainerComponent extends React.Component<ILineContainerComponentProps, { isExpanded: boolean }> {
    private static _InMemoryStorage: {[key: string]: boolean};
    
    constructor(props: ILineContainerComponentProps) {
        super(props);

        let initialState: boolean;

        try
        { 
            if (LineContainerComponent._InMemoryStorage && LineContainerComponent._InMemoryStorage[this.props.title] !== undefined) {
                initialState = LineContainerComponent._InMemoryStorage[this.props.title];
            } else if (typeof (Storage) !== "undefined" && localStorage.getItem(this.props.title) !== null) {
                initialState = localStorage.getItem(this.props.title) === "true";
            } else {
                initialState = !this.props.closed;
            }   
        }
        catch (e) {
            LineContainerComponent._InMemoryStorage = {};
            LineContainerComponent._InMemoryStorage[this.props.title] = !this.props.closed
            initialState = !this.props.closed;
        }

        this.state = { isExpanded: initialState };
    }

    switchExpandedState(): void {
        const newState = !this.state.isExpanded;
        
        try
        { 
            if (LineContainerComponent._InMemoryStorage) {
                LineContainerComponent._InMemoryStorage[this.props.title] = newState;
            } else if (typeof (Storage) !== "undefined") {
                localStorage.setItem(this.props.title, newState ? "true" : "false");
            }
        }
        catch (e) {
            LineContainerComponent._InMemoryStorage = {};
            LineContainerComponent._InMemoryStorage[this.props.title] = newState;
        }
        
        this.setState({ isExpanded: newState });

    }

    renderHeader() {
        const className = this.state.isExpanded ? "collapse" : "collapse closed";

        return (
            <div className="header" onClick={() => this.switchExpandedState()}>
                <div className="title">
                    {this.props.title}
                </div>
                <div className={className}>
                    <FontAwesomeIcon icon={faChevronDown} />
                </div>
            </div>
        )
    }

    render() {
        if (!this.state.isExpanded) {
            return (
                <div className="paneContainer">
                    {
                        this.renderHeader()
                    }
                </div>
            )
        }

        return (
            <div className="paneContainer">
                {
                    this.renderHeader()
                }
                <div className="paneList">
                    {this.props.children}
                </div >
            </div>
        );
    }
}