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uni_modules/uview-next/components/u-barcode/JsBarcode/barcodes/MSI/MSI.js

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+// Encoding documentation
+// https://en.wikipedia.org/wiki/MSI_Barcode#Character_set_and_binary_lookup
+
+import Barcode from "../Barcode.js";
+
+class MSI extends Barcode{
+	constructor(data, options){
+		super(data, options);
+	}
+
+	encode(){
+		// Start bits
+		var ret = "110";
+
+		for(var i = 0; i < this.data.length; i++){
+			// Convert the character to binary (always 4 binary digits)
+			var digit = parseInt(this.data[i]);
+			var bin = digit.toString(2);
+			bin = addZeroes(bin, 4 - bin.length);
+
+			// Add 100 for every zero and 110 for every 1
+			for(var b = 0; b < bin.length; b++){
+				ret += bin[b] == "0" ? "100" : "110";
+			}
+		}
+
+		// End bits
+		ret += "1001";
+
+		return {
+			data: ret,
+			text: this.text
+		};
+	}
+
+	valid(){
+		return this.data.search(/^[0-9]+$/) !== -1;
+	}
+}
+
+function addZeroes(number, n){
+	for(var i = 0; i < n; i++){
+		number = "0" + number;
+	}
+	return number;
+}
+
+export default MSI;