bitburner-src/src/ui/React/ServerDropdown.jsx

/**
 * Creates a dropdown (select HTML element) with server hostnames as options
 *
 * Configurable to only contain certain types of servers
 */
import React from "react";
import { AllServers } from "../../Server/AllServers";

import { HacknetServer } from "../../Hacknet/HacknetServer";

// TODO make this an enum when this gets converted to TypeScript
export const ServerType = {
    All:        0,
    Foreign:    1, // Hackable, non-owned servers
    Owned:      2, // Home Computer, Purchased Servers, and Hacknet Servers
    Purchased:  3, // Everything from Owned except home computer
}

export class ServerDropdown extends React.Component {
    /**
     * Checks if the server should be shown in the dropdown menu, based on the
     * 'serverType' property
     */
    isValidServer(s) {
        const type = this.props.serverType;
        switch (type) {
            case ServerType.All:
                return true;
            case ServerType.Foreign:
                return (s.hostname !== "home" && !s.purchasedByPlayer);
            case ServerType.Owned:
                return s.purchasedByPlayer || (s instanceof HacknetServer) || s.hostname === "home";
            case ServerType.Purchased:
                return s.purchasedByPlayer || (s instanceof HacknetServer);
            default:
                console.warn(`Invalid ServerType specified for ServerDropdown component: ${type}`);
                return false;
        }
    }

    /**
     * Given a Server object, creates a Option element
     */
    renderOption(s) {
        return (
            <option key={s.hostname} value={s.hostname}>{s.hostname}</option>
        )
    }

    render() {
        const servers = [];
        for (const serverName in AllServers) {
            const server = AllServers[serverName];
            if (this.isValidServer(server)) {
                servers.push(this.renderOption(server));
            }
        }

        return (
            <select className={"dropdown"} onChange={this.props.onChange} style={this.props.style}>
                {servers}
            </select>
        )
    }
}