Little refactor of barcode scanner

src/containers/BarcodeScanner/index.js

@@ -106,7 +106,6 @@ const BarcodeScanner = () => {
   const processSnapshot = (snapshot) => {
 
     const bars = [];
-
     const pixels = [];
     let pixelBars = [];
 
@@ -116,11 +115,11 @@ const BarcodeScanner = () => {
     }
 
     // normalize and convert to binary
-    const minPixel = Math.min(...pixels);
+    const minPixelValue = Math.min(...pixels);
-    const maxPixel = Math.max(...pixels);
+    const maxPixelValue = Math.max(...pixels);
 
     const binary = pixels.reduce((arr, val) => {
-      const binaryValue = Math.round((val - minPixel) / (maxPixel - minPixel) * 255) > config.threshold ? 1 : 0
+      const binaryValue = Math.round((val - minPixelValue) / (maxPixelValue - minPixelValue) * 255) > config.threshold ? 1 : 0
       return [...arr, binaryValue]
     }, []);
 
@@ -145,12 +144,12 @@ const BarcodeScanner = () => {
     }
 
     // find starting sequence
-    let startIndex = 0;
     const minFactor = 0.5;
     const maxFactor = 1.5;
+    let startIndex = 0;
 
     for (let i = 3; i < pixelBars.length; i++) {
-      const refLength = (pixelBars[i] + pixelBars[i-1] + pixelBars[i-2]) / 3;
+      const refLength = (pixelBars[i] + pixelBars[i - 1] + pixelBars[i - 2]) / 3;
       if (
        (pixelBars[i] > (minFactor * refLength) || pixelBars[i] < (maxFactor * refLength))
        && (pixelBars[i-1] > (minFactor * refLength) || pixelBars[i-1] < (maxFactor * refLength))
@@ -162,19 +161,14 @@ const BarcodeScanner = () => {
       }
     }
 
-    console.log("startIndex: " + startIndex );
-
     // return if no starting sequence found
     if (startIndex === 0) {
       return;
     }
 
     // discard leading and trailing patterns
-
     pixelBars = pixelBars.slice(startIndex, startIndex + 3 + 24 + 5 + 24 + 3);
 
-    console.log("pixelBars: " + pixelBars );
-
     // calculate relative widths
     const ref = (pixelBars[0] + pixelBars[1] + pixelBars[2]) / 3;
 
@@ -187,20 +181,13 @@ const BarcodeScanner = () => {
   }
 
   const analyzePattern = (bars) => {
-
-    console.clear();
-
-    console.log("analyzing");
-
     // determine parity first digit and reverse sequence if necessary
-
     const first = normalize(bars.slice(3, 3 + 4), 7);
     if (!isOdd(Math.round(first[1] + first[3]))) {
       bars = bars.reverse();
     }
 
     // split into digits
-
     const digits = [
       normalize(bars.slice(3, 3 + 4), 7),
       normalize(bars.slice(7, 7 + 4), 7),
@@ -216,8 +203,6 @@ const BarcodeScanner = () => {
       normalize(bars.slice(52, 52 + 4), 7)
     ]
 
-    console.log("digits: " + digits);
-
     // determine parity and reverse if necessary
     const parities = [];
 
@@ -252,17 +237,13 @@ const BarcodeScanner = () => {
       }
 
     }
-
-    console.log("result: " + result);
-
     // check digit
     const checkDigit = check[parities.join('')];
 
     // output
-    console.log("quality: " + quality);
-
     if(quality < config.quality) {
-      setDecodedBarcode(checkDigit + result.join(''))
+      const barcode = checkDigit + result.join('')
+      setDecodedBarcode(barcode)
     }
 
   }