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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| "use strict"; | ||
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| Object.defineProperty(exports, "__esModule", { | ||
| value: true | ||
| }); | ||
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| function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } | ||
|
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| var ITF = function () { | ||
| function ITF(string) { | ||
| _classCallCheck(this, ITF); | ||
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| this.string = string; | ||
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| this.binaryRepresentation = { | ||
| "0": "00110", | ||
| "1": "10001", | ||
| "2": "01001", | ||
| "3": "11000", | ||
| "4": "00101", | ||
| "5": "10100", | ||
| "6": "01100", | ||
| "7": "00011", | ||
| "8": "10010", | ||
| "9": "01010" | ||
| }; | ||
| } | ||
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| ITF.prototype.valid = function valid() { | ||
| return this.string.search(/^([0-9]{2})+$/) !== -1; | ||
| }; | ||
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| ITF.prototype.encode = function encode() { | ||
| // Always add the same start bits | ||
| var result = "1010"; | ||
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| // Calculate all the digit pairs | ||
| for (var i = 0; i < this.string.length; i += 2) { | ||
| result += this.calculatePair(this.string.substr(i, 2)); | ||
| } | ||
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| // Always add the same end bits | ||
| result += "11101"; | ||
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| return { | ||
| data: result, | ||
| text: this.string | ||
| }; | ||
| }; | ||
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| // Calculate the data of a number pair | ||
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| ITF.prototype.calculatePair = function calculatePair(numberPair) { | ||
| var result = ""; | ||
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| var number1Struct = this.binaryRepresentation[numberPair[0]]; | ||
| var number2Struct = this.binaryRepresentation[numberPair[1]]; | ||
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| // Take every second bit and add to the result | ||
| for (var i = 0; i < 5; i++) { | ||
| result += number1Struct[i] == "1" ? "111" : "1"; | ||
| result += number2Struct[i] == "1" ? "000" : "0"; | ||
| } | ||
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| return result; | ||
| }; | ||
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| return ITF; | ||
| }(); | ||
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| exports.ITF = ITF; |
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