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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
import QtQuick
ListModel {
id: model
property string stockId: ""
property string stockName: ""
property var newest
property var oldest
property bool ready: false
property real stockPrice: 0.0
property real stockPriceChanged: 0.0
signal dataReady
function indexOf(date) {
if (model.count == 0)
return -1;
if (newest <= date)
date = new Date(newest.getYear(),
newest.getMonth(),
newest.getDate() - 7);
if (oldest >= date)
return model.count - 1;
var currDiff = 0;
var bestDiff = Math.abs(date.getTime() - newest.getTime());
var retval = 0;
for (var i = 0; i < model.count; i++) {
var d = new Date(model.get(i).date);
currDiff = Math.abs(d.getTime() - date.getTime());
if (currDiff < bestDiff) {
bestDiff = currDiff;
retval = i + 1;
}
if (currDiff > bestDiff)
return retval;
}
return -1;
}
function createStockPrice(r) {
return {
"date": r[0],
"open":r[1],
"high":r[2],
"low":r[3],
"close":r[4],
"volume":r[5],
};
}
function updateStock() {
if (stockId === "")
return;
var startDate = new Date(2011, 4, 25);
var endDate = new Date(); //today
var req = "data/" + stockId + ".csv"
if (!req)
return;
var xhr = new XMLHttpRequest;
xhr.open("GET", req, true);
model.ready = false;
model.clear();
var i = 1; //skip the first line
xhr.onreadystatechange = function() {
if (xhr.readyState === XMLHttpRequest.LOADING || xhr.readyState === XMLHttpRequest.DONE) {
var records = xhr.responseText.split('\n');
for (;i < records.length; i++ ) {
var r = records[i].split(',');
if (r.length >= 6)
model.append(createStockPrice(r));
}
if (xhr.readyState === XMLHttpRequest.DONE) {
if (model.count > 0) {
model.ready = true;
model.stockPrice = model.get(0).close;
model.stockPriceChanged = model.count > 1 ? (Math.round((model.stockPrice - model.get(1).close) * 100) / 100) : 0;
newest = new Date(model.get(0).date);
oldest = new Date(model.get(model.count - 1).date);
} else {
model.stockPrice = 0;
model.stockPriceChanged = 0;
}
model.dataReady(); // emit signal - model.ready indicates whether the data is valid
}
}
}
xhr.send()
}
}
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