index.js

var d=new Date().toString();
var http = require('http');
var url = require('url');
var fs = require('fs');
var rest = require('restler');
var async = require('async');
var qs = require('querystring');

// var e=require('./email')

process.on('uncaughtException', function(err) {
  console.log('Caught exception: ' , err.stack);

  // sendemaillog('index.js uncaughtException', err.stack);

  //process.exit(3);
});

rates={
 dollar: 3.5 ,// ["USDILS=X",0,"1/1/2000","0:00pm"],
 euro:["EURILS=X",0,"1/1/2000","0:00pm"],
 bitsofgold: {"btc_spot":{"ILS":0,"EUR":0,"USD":0}},
 bit2c: {"amount":0,"total":0,"av_price":0,"min_price":0,"max_price":0},
 bitgo: {"currentSellingPrice":0,"currentBuyingPrice":0,"amountAvalibleForSale":"0","amountAvalibleForBuy":0},
 bitstamp: {"high": "0", "last": "0", "timestamp": "0", "bid": "0", "vwap": "0", "volume": "0", "low": "0", "ask": "0"},
 btce:     {"ticker":{"high":0,"low":0,"avg":0,"vol":0,"vol_cur":0,"last":0,"buy":0,"sell":0,"updated":0,"server_time":0}},
 bitpay: [{"code":"USD","name":"US Dollar","rate":0},{"code":"ILS","name":"Israeli Shekel","rate":0}],
 coingecko: {"bitcoin": {"ils": 0}}
}

function cbguard(cb,printerr){ //prevents a callback to be called twice
 var cb1=cb;
 return function() {
  if(cb1) { var cb2=cb1; cb1=false; return cb2.apply(this,arguments); }
  else if(printerr)console.log(new Error('cb called twice').stack);
 }
}


var prev_ils=0,prev_usd=0;
update=function(cb)
{
 async.parallel( //faster
 //async.series(// slower
 [
//  function(cb){cb=cbguard(cb);try{ reust.get("https://www.investing.com/common/modules/js_instrument_chart/api/data.php?pair_id=63&pair_id_for_news=63&chart_type=area&pair_interval=60&candle_count=120&events=yes&volume_series=yes&period=https://www.investing.com/common/modules/js_instrument_chart/api/data.php?pair_id=63&pair_id_for_news=63&chart_type=area&pair_interval=60&candle_count=120&events=yes&volume_series=yes&period=",{ rejectUnauthorized:false, headers:{ 'Accept-Encoding':'gzip, deflate', 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36', 'Referer': 'https://www.investing.com/currencies/usd-ils', 'X-Requested-With': 'XMLHttpRequest' } }).on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();} data=JSON.parse(data); if(typeof data=='object' && data!==null) rates.dollar=data.candles[data.candles.length-1][1]; cb(); });  } catch(e){console.log(e.stack);cb();} }
//  function(cb){cb=cbguard(cb);try{ rest.get('https://www.bloomberg.com/markets/watchlist/recent-tickers/data/USDILS:CUR').on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();} if(typeof data=='object' && data!==null)rates.dollar=data.tickers[0].last_price; cb(); });  } catch(e){console.log(e.stack);cb();} }
//  function(cb){cb=cbguard(cb);try{ rest.get('http://download.finance.yahoo.com/d/quotes.csv?e=.csv&f=sl1d1t1&s=USDILS=X').on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();}  try{data=JSON.parse("["+data.trim().replace(/""/,"\\\"")+']');} catch(e){console.log(e.stack)} if(typeof data=='object' && data!==null)rates.dollar=data; cb(); });  } catch(e){console.log(e.stack);cb();} }
//  ,function(cb){cb=cbguard(cb);try{ rest.get('http://download.finance.yahoo.com/d/quotes.csv?e=.csv&f=sl1d1t1&s=EURILS=X').on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();}  try{data=JSON.parse("["+data.trim().replace(/""/,"\\\"")+']');} catch(e){console.log(e.stack)} if(typeof data=='object' && data!==null)rates.euro=data; cb(); });  } catch(e){console.log(e.stack);cb();} }
  function(cb){cb=cbguard(cb);try{ rest.get("https://webapi.bitsofgold.co.il/v1/rates",{rejectUnauthorized:false}).on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();}; if(typeof data=='object' && data!==null) rates.bitsofgold=data; cb();  });  } catch(e){console.log(e.stack);cb();} }
  ,function(cb){cb=cbguard(cb);try{ rest.get("https://bit2c.co.il/Exchanges/BtcNis/Ticker.json",{rejectUnauthorized:false}).on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();} if(typeof data=='object' && data!==null) rates.bit2c=data; cb();  });  } catch(e){console.log(e.stack);cb();} }
//  ,function(cb){cb=cbguard(cb);try{ rest.get('https://www.bitgo.co.il/components/loadcontrol.aspx?cn=statspanel&json=true',{rejectUnauthorized:false}).on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();}  if(typeof data=='object' && data!==null)  rates.bitgo=data; cb(); });  } catch(e){console.log(e.stack);cb();} }
//  ,function(cb){cb=cbguard(cb);try{ rest.get('https://apiv2.bitcoinaverage.com/indices/global/ticker/BTCILS',{rejectUnauthorized:false}).on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();} if(typeof data=='object' && data!==null) rates.bitcoinaverageILS=data;  }); cb(); } catch(e){console.log(e.stack);cb();} }
//  ,function(cb){cb=cbguard(cb);try{ rest.get('https://api.bitcoinaverage.com/ticker/global/EUR/',{rejectUnauthorized:false}).on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();} if(typeof data=='object' && data!==null) rates.bitcoinaverageEUR=data;  }); cb();  } catch(e){console.log(e.stack);cb();} }
//  ,function(cb){cb=cbguard(cb);try{ rest.get('https://www.bitstamp.net/api/ticker/',{rejectUnauthorized:false}).on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();} if(typeof data=='object' && data!==null) Object.keys(data).forEach(function(a){data[a]=parseFloat(data[a])}); rates.bitstamp=data; cb(); });  } catch(e){console.log(e.stack);cb();} }
//  ,function(cb){cb=cbguard(cb);try{ rest.get('https://btc-e.com/api/2/btc_usd/ticker',{rejectUnauthorized:false}).on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();} try{data=JSON.parse(data);} catch(e){console.log(e.stack)} if(typeof data=='object' && data!==null) rates.btce=data;  }); cb(); } catch(e){console.log(e.stack);cb();} }
  ,function(cb){cb=cbguard(cb);try{ rest.get("https://api.coingecko.com/api/v3/simple/price?ids=Bitcoin&vs_currencies=ILS",{rejectUnauthorized:false}).on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();} if(typeof data=='object' && data!==null) rates.coingecko=data; cb();  });  } catch(e){console.log(e.stack);cb();} }

/*  ,function(cb){cb=cbguard(cb);try{ rest.get('https://bitpay.com/api/rates',{rejectUnauthorized:false}).on('complete', function(data) { if(data instanceof Error){console.log(data.stack);return cb();} if(typeof data=='object' && data!==null)


   {
    var d=[];
    if(data.length && data[prev_usd].code=='USD' && data[prev_ils].code=='ILS') 
    {
     d=[data[prev_usd],data[prev_ils]];
    }
    else
    {
     for(var c,i=0;i<data.length;i++)
     {
      c=data[i];
      if(c.code=='USD'){d.push(c);prev_usd=i}
      if(c.code=='ILS'){d.push(c);prev_ils=i}
     }
    }
    rates.bitpay=d;
   }
   cb(); });  } catch(e){console.log(e.stack);cb();} }
*/
 ],cb
 )//parallel
}

var Canvas = require('canvas')
  , Font = Canvas.Font
  , mcanvas = new Canvas(20,20)
  , mctx = mcanvas.getContext('2d');
var GifEncoder = require('gif-encoder');

var fontarr=false;
function loadfonts(ctx)
{
 if (!Font) { console.log('unable to load fonts from files. you will need to use windows font names'); return;}
 if(fontarr===false){ fontarr=[];fs.readdirSync(__dirname+'/fonts').forEach(function(a){
var file= __dirname+'/fonts/'+a;
var namea=a.toLowerCase().split('.');
var name=namea[0]
if(namea[namea.length-1]=='ttf')
{
 console.log(" add font '"+name+"'")

var font = new Font(name, file);
  //font.addFace(fontFile('PfennigBold.ttf'),   'bold');
  //font.addFace(fontFile('PfennigItalic.ttf'), 'normal', 'italic');
  //font.addFace(fontFile('PfennigBoldItalic.ttf'), 'bold', 'italic');
 fontarr.push(font);
}
else
{
  console.log(" not add font '"+file+"'")
}
});}
 if(ctx)
 for(var i=0;i<fontarr.length;i++)
 {
  ctx.addFont(fontarr[i]);
 }
}
loadfonts(mctx);

var fliphebrew=require('./fliphebrew.js')

var parseurl=require('url').parse
var rateshtml=fs.readFileSync(__dirname+'/rates.html')
http.createServer(function (req, res) {
  if(req.url=='/rates'){  res.writeHead(200, {'Content-Type': 'text/javascript'}); res.end(JSON.stringify(rates, null, 2));}
  if(req.url=='/')     {  res.writeHead(200, {'Content-Type': 'text/html'}); res.end(rateshtml);}
  if(req.url.substring(0,'/image'.length)=='/image')     {
    var purl=parseurl(req.url,true)
    var text=fliphebrew(purl.query.text)||'bitcoin!';
    mctx.antialias = 'none';
    var font=purl.query.font||'14px Impact';
    mctx.font = font;
    var te = mctx.measureText(text);
    te.height=
    te.emHeightAscent//: 8,
    +te.emHeightDescent//: 2,
    -1;// for 16 size

    te.top=
    te.emHeightAscent //: 8
    -te.actualBoundingBoxAscen//: 7

    var canvas = new Canvas(te.width,te.height)
      , ctx = canvas.getContext('2d');
      loadfonts(ctx);

      ctx.fillStyle="#FFFFFF";
      ctx.fillRect(0,0,te.width,te.height);
      ctx.antialias = 'none';
      ctx.font = font;
      ctx.fillStyle="#000000";
      ctx.fillText(text, te.actualBoundingBoxLeft,te.emHeightAscent);
      res.writeHead(200, {'Content-Type': 'image/gif'}); 

    //var stream = canvas.createPNGStream();

    // Create a 10 x 10 gif
    var gif = new GifEncoder(canvas.width, canvas.height);

    // using an rgba array of pixels [r, g, b, a, ... continues on for every pixel]
    // This can be collected from a <canvas> via context.getImageData(0, 0, width, height).data
    //var pixels = [0, 0, 0, 255/*, ...*/];

    // Collect output
    //var file = require('fs').createWriteStream('img.gif');
    gif.pipe(res);

    // Write out the image into memory
    gif.writeHeader();
    gif.addFrame(ctx.getImageData(0,0,canvas.width,canvas.height).data);
    // gif.addFrame(pixels); // Write subsequent rgba arrays for more frames
    gif.finish();

  }
  if(req.url=='/write') {
    let body = ''
    req.on('data', function(data) {
      body += data
    })
    req.on('end', function() {
      var post = qs.parse(body)
      if (post.text) {
        console.log("Write: " + post.text)
        ledtext({text2: post.text})
      }
      res.writeHead(200)
      res.end('post received')
    })
  }
  else                 {  res.writeHead(404, {'Content-Type': 'text/plain'}); res.end(':-), since '+d+'\n');}
}).listen(3333);

console.log('Server running at http://127.0.0.1:3333/');


Number.prototype.formatMoney = function(c, d, t){
var n = this,
    c = isNaN(c = Math.abs(c)) ? 2 : c,
    d = d == undefined ? "." : d,
    t = t == undefined ? "," : t,
    s = n < 0 ? "-" : "", 
    i = parseInt(n = Math.abs(+n || 0).toFixed(c)) + "", 
    j = (j = i.length) > 3 ? j % 3 : 0;
   return s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
 };

ratestext=function()
{
  var p=3;
  var text1='Bitcoin'
  if(rates.coingecko.bitcoin.ils) text1='mBTC/ILS '+(rates.coingecko.bitcoin.ils/1000).formatMoney(p, '.', ',')//+'  '
  
  var p=3;
  var text2=''
  if(rates.bitsofgold.btc_spot.ILS) text2+=     'Bits of Gold '+(rates.bitsofgold.btc_spot.ILS/1000).formatMoney(p, '.', ',')+'  '
  if(rates.bit2c.ll) text2+=     'Bit2c '+(rates.bit2c.ll/1000).formatMoney(p, '.', ',')+'  '
//  if(rates.bitgo.currentSellingPrice) text2+=     'BitGo '+(rates.bitgo.currentSellingPrice/1000).formatMoney(p, '.', ',')+'  '
//  if(rates.bitcoinaverageUSD.ask) text2+=     'BitcoinAverage '+(rates.bitcoinaverageUSD.ask*rates.dollar/1000).formatMoney(p, '.', ',')+'  '
//  if(rates.bitstamp.ask) text2+=     'Bitstamp '+(rates.bitstamp.ask*rates.dollar[1]/1000).formatMoney(p, '.', ',')+'  '
//  if(rates.btce.ticker.sell) text2+=     'Btc-e '+(rates.btce.ticker.sell*rates.dollar[1]/1000).formatMoney(p, '.', ',')+'  ' 
//  if(rates.bitpay.filter(function(a){return a.code=='ILS'})[0].rate) text2+=     'Bitpay '+(rates.bitpay.filter(function(a){return a.code=='ILS'})[0].rate/1000).formatMoney(p, '.', ',')+'  '
/*
  var p=2;
  var text2='Bits of Gold '+(rates.bitsofgold.sell/1000).formatMoney(p, '.', ',')+'   '+
           'Bit2c '+(rates.bit2c.ll/1000).formatMoney(p, '.', ',')+'   '+
           'Bit Go '+(rates.bitgo.currentSellingPrice/1000).formatMoney(p, '.', ',')+'   '
*/
/*
  var p=5;
  var text2='Bits of Gold '+(rates.bitsofgold.sell/1000).formatMoney(p, '.', ',')+'   '+
           'Bit2c '+(rates.bit2c.ll/1000).formatMoney(p, '.', ',')+'   '+
           'BitGo '+(rates.bitgo.currentSellingPrice/1000).formatMoney(p, '.', ',')+'  '+
           'Bitcoin Average '+(rates.bitcoinaverageUSD.ask/1000).formatMoney(p, '.', ',')+' USD='+(rates.bitcoinaverageUSD.ask*rates.dollar/1000).formatMoney(p, '.', ',')+' ILS  '+
           'Bitcoin Average '+(rates.bitcoinaverageEUR.ask/1000).formatMoney(p, '.', ',')+' EUR='+(rates.bitcoinaverageEUR.ask*rates.euro[1]/1000).formatMoney(p, '.', ',')+' ILS  '+
           'Bitstamp '+(rates.bitstamp.ask/1000).formatMoney(p, '.', ',')+' USD='+(rates.bitstamp.ask*rates.dollar[1]/1000).formatMoney(p, '.', ',')+' ILS  '+
           'Btc-e '+(rates.btce.ticker.sell/1000).formatMoney(p, '.', ',')+' USD='+(rates.btce.ticker.sell*rates.dollar[1]/1000).formatMoney(p, '.', ',')+' ILS  ' +
           'Bitpay '+(rates.bitpay.filter(function(a){return a.code=='USD'})[0].rate/1000).formatMoney(p, '.', ',')+' USD='+(rates.bitpay.filter(function(a){return a.code=='ILS'})[0].rate/1000).formatMoney(p, '.', ',')+' ILS  '
*/
var r={text1 :text1,text2:text2}
 console.log(r)
 return r;
}

//cp=null // dont use led display
cp=require('./cpower1200.js'); // use led display

var prevtext={text1:'',text2:''};
ledtext=function(options,cb)
{
 if(!cp){
  if(cb) return cb(); //if led display avalibale and callback avalible
 return;
 }
 try{
   function t1(cb)
   {
    if(options.text1&&prevtext.text1!=options.text1)
    {
     cp.serialwrite(cp.sendTextDataToASpecifiedWindow({window:0, text:options.text1, effect: cp.effect.indexOf('Draw') ,align:'center' }),cb);
     prevtext.text1=options.text1
    }
    else cb();
   }

   function t2(cb)
   {
    if(options.text2&&prevtext.text2!=options.text2)
    {
     cp.serialwrite(cp.sendTextDataToASpecifiedWindow({window:1, text:options.text2 }));
  prevtext.text2=options.text2
    }
    else cb();
   }

   t1(function(){

    t2(function(){

      //if(cp.serial)cp.serial.close();
      if(cb)cb();

    });

   });
   
 }catch(err){ if(err)console.log('err ', err.stack);}
}

var  repl = require("repl");repl.start({ useGlobal:true,  useColors:true, });// uncomment to test


function run()
{
 update(function(){ledtext(ratestext());console.log('done');setTimeout(run,30000);});
}
run()