const fs = require('fs');

console.log("Hello!")

finalData=[]
firstLoad=true

function update(){
    changed=false
    fs.readFile("C:\\Users\\sigon\\Documents\\memory",
    (err,data)=>{
        var fileContents = data.toString().split("\n");
        for (i=0;i<fileContents.length;i++){
            line=fileContents[i]
            item=line.split(" ")
            itemID=item[1]
            itemAmt=item[0]
            itemHQ=item[2]
            //console.log(itemID+" x"+itemAmt+" "+(itemHQ?"":"HQ"))
            if(firstLoad){
                finalData=[{"id":itemID,"amt":itemAmt,"hq":itemHQ},...finalData]
            }else
            if (finalData[i]!==undefined){
                if (finalData[i].id!==itemID||finalData[i].amt!==itemAmt||finalData[i].hq!==itemHQ){
                    finalData[i]={"id":itemID,"amt":itemAmt,"hq":itemHQ}
                    changed=true;
                }
            }
        }
        if (changed){
            console.log("Changes occurred...")
        }
        firstLoad=false
        setTimeout(update,1000)
    })
}

update()