gretzke

var price = 50000000000000000;

status.command({
    name: 'hours',
    description: 'How many hours do you want to book the ...?',
    color: '#CCCCCC',
    sequentialParams: true,
    params: [{
        name: 'hours',
        type: status.types.NUMBER,
        placeholder: 'e.g. 12 hours',
        suggestions: hoursSuggestions
    }],
    handler: function(params) {
        return {'text-message': 'OK'};
    }
});

function hoursLabel(params) {
    var value = params.value;
    return "Book the ... for " + value + " hours";
}
function priceLabel(params) {
    var value = parseInt(params.value)*parseInt(price);
    return "Price: " + web3.fromWei(value, "ether") + " ETH";
}
function validationTextLabel(params) {
    var value = parseInt(params.value)*parseInt(price);
    var balance = parseInt(web3.toWei(params.balance));
    if (value>balance) {
        return "Insufficient Balance!";
    } else {
        return "";
    }
}
status.defineSubscription(
    // the name of subscription and the name of the value in bot-db
    // associated with this subscription
    "setHours",
    // the map of values on which subscription depends: keys are arbitrary names
    // and values are db paths to another value
    {value: ["sliderValue"]},
    // the function which will be called as reaction on changes of values above,
    // should be pure. Returned result will be associated with subscription in bot-db
    hoursLabel
);
status.defineSubscription(
    "setPrice",
    {value: ["sliderValue"]},
    priceLabel
);
status.defineSubscription(
    "setValidationText",
    {value: ["sliderValue"], balance: ["balance"]},
    validationTextLabel
);
function hoursSuggestions(params, context) {
    var balance = parseFloat(web3.fromWei(web3.eth.getBalance(context.from), "ether"));
    var defaultSliderValue = 1;

    var view = ["view", {style: {margin:10}},
        ["text", {}, "Set the maximum time you will be using the ... here. Don't worry, you will be refunded any time you don't use!"],
        ["text", {}, "Your Balance " + balance + " ETH"],
        ["text", {}, ["subscribe", ["setPrice"]]],
        ["text", {}, ["subscribe", ["setHours"]]],
        ["subscibe"],
        ["slider", {
            maximumValue: 24,
            value: defaultSliderValue,
            minimumValue: 1,
            onSlidingComplete: ["dispatch", ["set", "sliderValue"]],
            step: 1
        }],
        ['dispatch', [status.events.SET_COMMAND_ARGUMENT, [0 /arg idx/, value, false /move-to-next? true or false/]]]
        ['touchable',
            {onPress: ['dispatch', [status.events.SET_COMMAND_ARGUMENT, [0, "12", false]]]},
            ["view", {}, ["text", {}, "Press here to set Value!"]]
        ],
        ["text", {style: {color: "red"}}, ["subscribe", ["setValidationText"]]]
    ];

    status.setDefaultDb({
        sliderValue: defaultSliderValue,
        balance: balance,
        setHours: hoursLabel({value: defaultSliderValue}),
        setPrice: priceLabel({value: defaultSliderValue}),
        setValidationText: validationTextLabel({value: defaultSliderValue, balance: balance})
    });

    status.updateDb({
        balance: balance,
    });

    return {markup: view};
}