/
background.js
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background.js
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import { createDOM, isValidPriceObject, emptyAll, getUrl } from "./utils.js";
import { OPEN, HIGH, LOW, CLOSE, VOLUME } from "./constants.js";
import { updateLTP } from "./indicators/ltp.js";
import { updateSimpleAverages } from "./indicators/simpleAverages.js";
import { updateExponentialAverages } from "./indicators/exponentialAverages.js";
import { updateMACD } from "./indicators/macd.js";
import { updateRSI } from "./indicators/rsi.js";
import { updateBollingerBands } from "./indicators/bollingerBand.js";
function updateHistoricalData(stockUrl) {
emptyAll();
jQuery.get(stockUrl,function(data) {
var dStr = String(data);
var indexOfHistoricalPriceStore = dStr.indexOf('HistoricalPriceStore');
var jsonArrayBegin = indexOfHistoricalPriceStore + 32; // "HistoricalPriceStore:{"prices":[
var jsonArrayEnd = jsonArrayBegin + 1;
while(dStr[jsonArrayEnd] != ']') {
jsonArrayEnd = jsonArrayEnd + 1;
}
var jsonString = dStr.substring(jsonArrayBegin,jsonArrayEnd+1);
try {
var jsonArray = jQuery.parseJSON(jsonString);
} catch(error){
document.getElementById("Error").appendChild(createDOM("p"," Invalid Stock Symbol"));
console.log("Invalid Stock Symbol");
return;
}
for(var index in jsonArray) {
var priceObject = jsonArray[index];
if(isValidPriceObject(priceObject)) {
OPEN.push(priceObject.open);
HIGH.push(priceObject.high);
LOW.push(priceObject.low);
CLOSE.push(priceObject.close);
VOLUME.push(priceObject.volume);
}
}
if( CLOSE.length < 100) {
console.log("Insufficient data points");
document.getElementById("Error").appendChild(createDOM("p", "Insufficient Data points"));
return;
}
updateLTP();
updateSimpleAverages();
updateExponentialAverages();
updateMACD();
updateRSI();
updateBollingerBands();
});
}
window.onload = function () {
var btn = document.getElementById("getStockReport");
var stockSymbol = document.getElementById("stockSymbol");
btn.onclick = function () {
console.log(stockSymbol.value);
var symbol = stockSymbol.value;
var stockUrl = getUrl(symbol);
updateHistoricalData(stockUrl);
}
}