// Fetch a known query parameter from the pages URL
async function getQuery(param) {
    var params = new URLSearchParams(window.location.search)
    var query = params.get(param)
    if (query) {
        return query
    } else {
        return 'false'
    }
}

// Set page headers
async function setHeaders(title,time) {
    var prefix = `OwlBoard - `
    document.title = `${prefix}${title}`
    document.getElementById("stn_name").innerHTML = title
    document.getElementById("fetch_time").innerHTML = time.toLocaleTimeString()
}

// Determine what should display in 'platform' column
async function parsePlatform(svc){
    if (svc.platform != undefined) {
        var platform = svc.platform;
    } else {
        var platform = "-";
    }
    if (svc.platformChanged) {
        var changed = "changed";
    } else {
        var changed = "";
    }
    return {num: platform, change: changed}
}

// Use different time strings to default to make better on small screens
async function parseTime(string){
    switch (string) {
        case "Delayed":
            var output = "LATE";
            var change = "changed";
            break;
        case "Cancelled":
            var output = "CANC";
            var change = "changed";
            break;
        case "On time":
            var output = "RT";
            var change = "";
            break;
        case "":
            var output = "-";
            var change = "";
            break;
        case undefined:
            var output = "-";
            var change = "";
            break;
        default:
            var output = string;
            var change = "changed";
    }
    return {data: output, changed: change};
}

// Sometimes the origin or destination names are undefined, need to catch that
async function parseName() {
    return;
}

// Display Alert Messages
async function displayAlerts() {
    document.getElementById("output").style = "margin-top:95px" // Adjust margin of train table div.
}

async function expandAlerts() {
    return
}

async function deflateAlerts() {
    return
}