export function compareVersion(ver1: string, ver2: string) {
    if (ver1 === ver2) { return 0; }
    let ver1Parts = ver1.split(".");
    let ver2Parts = ver2.split(".");
    let ver1Main = parseInt(ver1Parts[0]);
    let ver2Main = parseInt(ver2Parts[0]);
    if (ver1Main > ver2Main) { return 1; }
    if (ver1Main < ver2Main) { return -1; }
    let ver1Second = parseInt(ver1Parts[1]);
    let ver2Second = parseInt(ver2Parts[1]);
    if (ver1Second > ver2Second) { return 1; }
    if (ver1Second < ver2Second) { return -1; }
    let ver1Third = parseInt(ver1Parts[2]);
    let ver2Third = parseInt(ver2Parts[2]);
    if (ver1Third > ver2Third) { return 1; }
    if (ver1Third < ver2Third) { return -1; }
    return 0;
}

export function isOn(val: string) {
    let lowerVal = (val == null)? val: val.toLowerCase();
    return lowerVal === "on" || lowerVal === "yes" || lowerVal === "1" || lowerVal === "true";
}

export function isEnvOn(envKey: string) {
    return Deno.env.get(envKey);
}