qrcode.js

let QR8bitByte = class {
	constructor(data) {
		this.mode = QRMode.MODE_8BIT_BYTE;
		this.data = data;
		this.parsedData = [];
		// Added to support UTF-8 Characters
		for (let i = 0, l = this.data.length; i < l; i++) {
			let byteArray = [];
			let code = this.data.charCodeAt(i);
			if (code > 0x10000) {
				byteArray[0] = 0xF0 | ((code & 0x1C0000) >>> 18);
				byteArray[1] = 0x80 | ((code & 0x3F000) >>> 12);
				byteArray[2] = 0x80 | ((code & 0xFC0) >>> 6);
				byteArray[3] = 0x80 | (code & 0x3F);
			} else if (code > 0x800) {
				byteArray[0] = 0xE0 | ((code & 0xF000) >>> 12);
				byteArray[1] = 0x80 | ((code & 0xFC0) >>> 6);
				byteArray[2] = 0x80 | (code & 0x3F);
			} else if (code > 0x80) {
				byteArray[0] = 0xC0 | ((code & 0x7C0) >>> 6);
				byteArray[1] = 0x80 | (code & 0x3F);
			} else {
				byteArray[0] = code;
			}
			this.parsedData.push(byteArray);
		}
		this.parsedData = Array.prototype.concat.apply([], this.parsedData);
		if (this.parsedData.length != this.data.length) {
			this.parsedData.unshift(191);
			this.parsedData.unshift(187);
			this.parsedData.unshift(239);
		}
	}
	getLength() {
		return this.parsedData.length;
	}
	write(buffer) {
		for (let i = 0, l = this.parsedData.length; i < l; i++) {
			buffer.put(this.parsedData[i], 8);
		}
	}
};

let QRCodeModel = class {
	constructor(typeNumber, errorCorrectLevel) {
		this.typeNumber = typeNumber;
		this.errorCorrectLevel = errorCorrectLevel;
		this.modules = null;
		this.moduleCount = 0;
		this.dataCache = null;
		this.dataList = [];
	}
	addData(data) {
		let newData = new QR8bitByte(data);
		this.dataList.push(newData);
		this.dataCache = null;
	}
	isDark(row, col) {
		check(row >= 0 && this.moduleCount > row && col >= 0 && this.moduleCount > col, `${row}, ${col}`);
		return this.modules[row][col];
	}
	getModuleCount() {
		return this.moduleCount;
	}
	make() {
		this.makeImpl(false, this.getBestMaskPattern());
	}
	makeImpl(test, maskPattern) {
		this.moduleCount = this.typeNumber * 4 + 17;
		this.modules = new Array(this.moduleCount);
		for (let row = 0; row < this.moduleCount; row++) {
			this.modules[row] = new Array(this.moduleCount);
			for (let col = 0; col < this.moduleCount; col++) {
				this.modules[row][col] = null;
			}
		}
		this.setupPositionProbePattern(0, 0);
		this.setupPositionProbePattern(this.moduleCount - 7, 0);
		this.setupPositionProbePattern(0, this.moduleCount - 7);
		this.setupPositionAdjustPattern();
		this.setupTimingPattern();
		this.setupTypeInfo(test, maskPattern);
		if (this.typeNumber >= 7) {
			this.setupTypeNumber(test);
		}
		if (this.dataCache == null) {
			this.dataCache = QRCodeModel.createData(this.typeNumber, this.errorCorrectLevel, this.dataList);
		}
		this.mapData(this.dataCache, maskPattern);
	}
	setupPositionProbePattern(row, col) {
		for (let r = -1; r <= 7; r++) {
			if (row + r <= -1 || this.moduleCount <= row + r)
				continue;
			for (let c = -1; c <= 7; c++) {
				if (col + c <= -1 || this.moduleCount <= col + c)
					continue;
				if ((0 <= r && r <= 6 && (c == 0 || c == 6)) || (0 <= c && c <= 6 && (r == 0 || r == 6)) || (2 <= r && r <= 4 && 2 <= c && c <= 4)) {
					this.modules[row + r][col + c] = true;
				} else {
					this.modules[row + r][col + c] = false;
				}
			}
		}
	}
	getBestMaskPattern() {
		let minLostPoint = 0;
		let pattern = 0;
		for (let i = 0; i < 8; i++) {
			this.makeImpl(true, i);
			let lostPoint = QRUtil.getLostPoint(this);
			if (i == 0 || minLostPoint > lostPoint) {
				minLostPoint = lostPoint;
				pattern = i;
			}
		}
		return pattern;
	}
	createMovieClip(target_mc, instance_name, depth) {
		let qr_mc = target_mc.createEmptyMovieClip(instance_name, depth);
		let cs = 1;
		this.make();
		for (let row = 0; row < this.modules.length; row++) {
			let y = row * cs;
			for (let col = 0; col < this.modules[row].length; col++) {
				let x = col * cs;
				let dark = this.modules[row][col];
				if (dark) {
					qr_mc.beginFill(0, 100);
					qr_mc.moveTo(x, y);
					qr_mc.lineTo(x + cs, y);
					qr_mc.lineTo(x + cs, y + cs);
					qr_mc.lineTo(x, y + cs);
					qr_mc.endFill();
				}
			}
		}
		return qr_mc;
	}
	setupTimingPattern() {
		for (let r = 8; r < this.moduleCount - 8; r++) {
			if (this.modules[r][6] != null) {
				continue;
			}
			this.modules[r][6] = (r % 2 == 0);
		}
		for (let c = 8; c < this.moduleCount - 8; c++) {
			if (this.modules[6][c] != null) {
				continue;
			}
			this.modules[6][c] = (c % 2 == 0);
		}
	}
	setupPositionAdjustPattern() {
		let pos = QRUtil.getPatternPosition(this.typeNumber);
		for (let i = 0; i < pos.length; i++) {
			for (let j = 0; j < pos.length; j++) {
				let row = pos[i];
				let col = pos[j];
				if (this.modules[row][col] != null) {
					continue;
				}
				for (let r = -2; r <= 2; r++) {
					for (let c = -2; c <= 2; c++) {
						if (r == -2 || r == 2 || c == -2 || c == 2 || (r == 0 && c == 0)) {
							this.modules[row + r][col + c] = true;
						} else {
							this.modules[row + r][col + c] = false;
						}
					}
				}
			}
		}
	}
	setupTypeNumber(test) {
		let bits = QRUtil.getBCHTypeNumber(this.typeNumber);
		for (let i = 0; i < 18; i++) {
			let mod = (!test && ((bits >> i) & 1) == 1);
			this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod;
		}
		for (let i = 0; i < 18; i++) {
			let mod = (!test && ((bits >> i) & 1) == 1);
			this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
		}
	}
	setupTypeInfo(test, maskPattern) {
		let data = (this.errorCorrectLevel << 3) | maskPattern;
		let bits = QRUtil.getBCHTypeInfo(data);
		for (let i = 0; i < 15; i++) {
			let mod = (!test && ((bits >> i) & 1) == 1);
			if (i < 6) {
				this.modules[i][8] = mod;
			} else if (i < 8) {
				this.modules[i + 1][8] = mod;
			} else {
				this.modules[this.moduleCount - 15 + i][8] = mod;
			}
		}
		for (let i = 0; i < 15; i++) {
			let mod = (!test && ((bits >> i) & 1) == 1);
			if (i < 8) {
				this.modules[8][this.moduleCount - i - 1] = mod;
			} else if (i < 9) {
				this.modules[8][15 - i - 1 + 1] = mod;
			} else {
				this.modules[8][15 - i - 1] = mod;
			}
		}
		this.modules[this.moduleCount - 8][8] = (!test);
	}
	mapData(data, maskPattern) {
		let inc = -1;
		let row = this.moduleCount - 1;
		let bitIndex = 7;
		let byteIndex = 0;
		for (let col = this.moduleCount - 1; col > 0; col -= 2) {
			if (col == 6)
				col--;
			while (true) {
				for (let c = 0; c < 2; c++) {
					if (this.modules[row][col - c] == null) {
						let dark = false;
						if (byteIndex < data.length) {
							dark = (((data[byteIndex] >>> bitIndex) & 1) == 1);
						}
						let mask = QRUtil.getMask(maskPattern, row, col - c);
						if (mask) {
							dark = !dark;
						}
						this.modules[row][col - c] = dark;
						bitIndex--;
						if (bitIndex == -1) {
							byteIndex++;
							bitIndex = 7;
						}
					}
				}
				row += inc;
				if (row < 0 || this.moduleCount <= row) {
					row -= inc;
					inc = -inc;
					break;
				}
			}
		}
	}

	static PAD0 = 0xEC;
	static PAD1 = 0x11;
	static createData(typeNumber, errorCorrectLevel, dataList) {
		let rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel);
		let buffer = new QRBitBuffer();
		for (let i = 0; i < dataList.length; i++) {
			let data = dataList[i];
			buffer.put(data.mode, 4);
			buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber));
			data.write(buffer);
		}
		let totalDataCount = 0;
		for (let i = 0; i < rsBlocks.length; i++) {
			totalDataCount += rsBlocks[i].dataCount;
		}
		check(buffer.getLengthInBits() <= totalDataCount * 8, `code length overflow. (${buffer.getLengthInBits()} > ${totalDataCount * 8})`);
		if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) {
			buffer.put(0, 4);
		}
		while (buffer.getLengthInBits() % 8 != 0) {
			buffer.putBit(false);
		}
		while (true) {
			if (buffer.getLengthInBits() >= totalDataCount * 8) {
				break;
			}
			buffer.put(QRCodeModel.PAD0, 8);
			if (buffer.getLengthInBits() >= totalDataCount * 8) {
				break;
			}
			buffer.put(QRCodeModel.PAD1, 8);
		}
		return QRCodeModel.createBytes(buffer, rsBlocks);
	}
	static createBytes(buffer, rsBlocks) {
		let offset = 0;
		let maxDcCount = 0;
		let maxEcCount = 0;
		let dcdata = new Array(rsBlocks.length);
		let ecdata = new Array(rsBlocks.length);
		for (let r = 0; r < rsBlocks.length; r++) {
			let dcCount = rsBlocks[r].dataCount;
			let ecCount = rsBlocks[r].totalCount - dcCount;
			maxDcCount = Math.max(maxDcCount, dcCount);
			maxEcCount = Math.max(maxEcCount, ecCount);
			dcdata[r] = new Array(dcCount);
			for (let i = 0; i < dcdata[r].length; i++) {
				dcdata[r][i] = 0xff & buffer.buffer[i + offset];
			}
			offset += dcCount;
			let rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
			let rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1);
			let modPoly = rawPoly.mod(rsPoly);
			ecdata[r] = new Array(rsPoly.getLength() - 1);
			for (let i = 0; i < ecdata[r].length; i++) {
				let modIndex = i + modPoly.getLength() - ecdata[r].length;
				ecdata[r][i] = (modIndex >= 0) ? modPoly.get(modIndex) : 0;
			}
		}
		let totalCodeCount = 0;
		for (let i = 0; i < rsBlocks.length; i++) {
			totalCodeCount += rsBlocks[i].totalCount;
		}
		let data = new Array(totalCodeCount);
		let index = 0;
		for (let i = 0; i < maxDcCount; i++) {
			for (let r = 0; r < rsBlocks.length; r++) {
				if (i < dcdata[r].length) {
					data[index++] = dcdata[r][i];
				}
			}
		}
		for (let i = 0; i < maxEcCount; i++) {
			for (let r = 0; r < rsBlocks.length; r++) {
				if (i < ecdata[r].length) {
					data[index++] = ecdata[r][i];
				}
			}
		}
		return data;
	}
};

let QRMode = {
	MODE_NUMBER: 1 << 0,
	MODE_ALPHA_NUM: 1 << 1,
	MODE_8BIT_BYTE: 1 << 2,
	MODE_KANJI: 1 << 3
};
let QRErrorCorrectLevel = {
	L: 1,
	M: 0,
	Q: 3,
	H: 2
};
let QRMaskPattern = {
	PATTERN000: 0,
	PATTERN001: 1,
	PATTERN010: 2,
	PATTERN011: 3,
	PATTERN100: 4,
	PATTERN101: 5,
	PATTERN110: 6,
	PATTERN111: 7
};
let QRUtil = {
	PATTERN_POSITION_TABLE: [[], [6, 18], [6, 22], [6, 26], [6, 30], [6, 34], [6, 22, 38], [6, 24, 42], [6, 26, 46], [6, 28, 50], [6, 30, 54], [6, 32, 58], [6, 34, 62], [6, 26, 46, 66], [6, 26, 48, 70], [6, 26, 50, 74], [6, 30, 54, 78], [6, 30, 56, 82], [6, 30, 58, 86], [6, 34, 62, 90], [6, 28, 50, 72, 94], [6, 26, 50, 74, 98], [6, 30, 54, 78, 102], [6, 28, 54, 80, 106], [6, 32, 58, 84, 110], [6, 30, 58, 86, 114], [6, 34, 62, 90, 118], [6, 26, 50, 74, 98, 122], [6, 30, 54, 78, 102, 126], [6, 26, 52, 78, 104, 130], [6, 30, 56, 82, 108, 134], [6, 34, 60, 86, 112, 138], [6, 30, 58, 86, 114, 142], [6, 34, 62, 90, 118, 146], [6, 30, 54, 78, 102, 126, 150], [6, 24, 50, 76, 102, 128, 154], [6, 28, 54, 80, 106, 132, 158], [6, 32, 58, 84, 110, 136, 162], [6, 26, 54, 82, 110, 138, 166], [6, 30, 58, 86, 114, 142, 170]],
	G15: (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0),
	G18: (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0),
	G15_MASK: (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1),
	getBCHTypeInfo(data) {
		let d = data << 10;
		while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) {
			d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15)));
		}
		return ((data << 10) | d) ^ QRUtil.G15_MASK;
	},
	getBCHTypeNumber(data) {
		let d = data << 12;
		while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) {
			d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18)));
		}
		return (data << 12) | d;
	},
	getBCHDigit(data) {
		let digit = 0;
		while (data != 0) {
			digit++;
			data >>>= 1;
		}
		return digit;
	},
	getPatternPosition(typeNumber) {
		return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1];
	},
	getMask(maskPattern, i, j) {
		switch (maskPattern) {
		case QRMaskPattern.PATTERN000:
			return (i + j) % 2 == 0;
		case QRMaskPattern.PATTERN001:
			return i % 2 == 0;
		case QRMaskPattern.PATTERN010:
			return j % 3 == 0;
		case QRMaskPattern.PATTERN011:
			return (i + j) % 3 == 0;
		case QRMaskPattern.PATTERN100:
			return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0;
		case QRMaskPattern.PATTERN101:
			return (i * j) % 2 + (i * j) % 3 == 0;
		case QRMaskPattern.PATTERN110:
			return ((i * j) % 2 + (i * j) % 3) % 2 == 0;
		case QRMaskPattern.PATTERN111:
			return ((i * j) % 3 + (i + j) % 2) % 2 == 0;
		default:
			throw new Error("bad maskPattern:" + maskPattern);
		}
	},
	getErrorCorrectPolynomial(errorCorrectLength) {
		let a = new QRPolynomial([1],0);
		for (let i = 0; i < errorCorrectLength; i++) {
			a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)],0));
		}
		return a;
	},
	getLengthInBits(mode, type) {
		if (1 <= type && type < 10) {
			switch (mode) {
			case QRMode.MODE_NUMBER:
				return 10;
			case QRMode.MODE_ALPHA_NUM:
				return 9;
			case QRMode.MODE_8BIT_BYTE:
				return 8;
			case QRMode.MODE_KANJI:
				return 8;
			default:
				throw new Error("mode:" + mode);
			}
		} else if (type < 27) {
			switch (mode) {
			case QRMode.MODE_NUMBER:
				return 12;
			case QRMode.MODE_ALPHA_NUM:
				return 11;
			case QRMode.MODE_8BIT_BYTE:
				return 16;
			case QRMode.MODE_KANJI:
				return 10;
			default:
				throw new Error("mode:" + mode);
			}
		} else if (type < 41) {
			switch (mode) {
			case QRMode.MODE_NUMBER:
				return 14;
			case QRMode.MODE_ALPHA_NUM:
				return 13;
			case QRMode.MODE_8BIT_BYTE:
				return 16;
			case QRMode.MODE_KANJI:
				return 12;
			default:
				throw new Error("mode:" + mode);
			}
		} else {
			throw new Error("type:" + type);
		}
	},
	getLostPoint(qrCode) {
		let moduleCount = qrCode.getModuleCount();
		let lostPoint = 0;
		for (let row = 0; row < moduleCount; row++) {
			for (let col = 0; col < moduleCount; col++) {
				let sameCount = 0;
				let dark = qrCode.isDark(row, col);
				for (let r = -1; r <= 1; r++) {
					if (row + r < 0 || moduleCount <= row + r) {
						continue;
					}
					for (let c = -1; c <= 1; c++) {
						if (col + c < 0 || moduleCount <= col + c) {
							continue;
						}
						if (r == 0 && c == 0) {
							continue;
						}
						if (dark == qrCode.isDark(row + r, col + c)) {
							sameCount++;
						}
					}
				}
				if (sameCount > 5) {
					lostPoint += (3 + sameCount - 5);
				}
			}
		}
		for (let row = 0; row < moduleCount - 1; row++) {
			for (let col = 0; col < moduleCount - 1; col++) {
				let count = 0;
				if (qrCode.isDark(row, col))
					count++;
				if (qrCode.isDark(row + 1, col))
					count++;
				if (qrCode.isDark(row, col + 1))
					count++;
				if (qrCode.isDark(row + 1, col + 1))
					count++;
				if (count == 0 || count == 4) {
					lostPoint += 3;
				}
			}
		}
		for (let row = 0; row < moduleCount; row++) {
			for (let col = 0; col < moduleCount - 6; col++) {
				if (qrCode.isDark(row, col) && !qrCode.isDark(row, col + 1) && qrCode.isDark(row, col + 2) && qrCode.isDark(row, col + 3) && qrCode.isDark(row, col + 4) && !qrCode.isDark(row, col + 5) && qrCode.isDark(row, col + 6)) {
					lostPoint += 40;
				}
			}
		}
		for (let col = 0; col < moduleCount; col++) {
			for (let row = 0; row < moduleCount - 6; row++) {
				if (qrCode.isDark(row, col) && !qrCode.isDark(row + 1, col) && qrCode.isDark(row + 2, col) && qrCode.isDark(row + 3, col) && qrCode.isDark(row + 4, col) && !qrCode.isDark(row + 5, col) && qrCode.isDark(row + 6, col)) {
					lostPoint += 40;
				}
			}
		}
		let darkCount = 0;
		for (let col = 0; col < moduleCount; col++) {
			for (let row = 0; row < moduleCount; row++) {
				if (qrCode.isDark(row, col)) {
					darkCount++;
				}
			}
		}
		let ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
		lostPoint += ratio * 10;
		return lostPoint;
	}
};
let QRMath = {
	glog(n) {
		check(n >= 1, `glog(${n})`);
		return QRMath.LOG_TABLE[n];
	},
	gexp(n) {
		while (n < 0) {
			n += 255;
		}
		while (n >= 256) {
			n -= 255;
		}
		return QRMath.EXP_TABLE[n];
	},
	EXP_TABLE: new Array(256),
	LOG_TABLE: new Array(256)
};
for (let i = 0; i < 8; i++) {
	QRMath.EXP_TABLE[i] = 1 << i;
}
for (let i = 8; i < 256; i++) {
	QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] ^ QRMath.EXP_TABLE[i - 5] ^ QRMath.EXP_TABLE[i - 6] ^ QRMath.EXP_TABLE[i - 8];
}
for (let i = 0; i < 255; i++) {
	QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i;
}

let QRPolynomial = class {
	constructor(num, shift) {
		check(num.length != undefined, `${num.length}/${shift}`);
		let offset = 0;
		while (offset < num.length && num[offset] == 0) {
			offset++;
		}
		this.num = new Array(num.length - offset + shift);
		for (let i = 0; i < num.length - offset; i++) {
			this.num[i] = num[i + offset];
		}
	}
	get(index) {
		return this.num[index];
	}
	getLength() {
		return this.num.length;
	}
	multiply(e) {
		let num = new Array(this.getLength() + e.getLength() - 1);
		for (let i = 0; i < this.getLength(); i++) {
			for (let j = 0; j < e.getLength(); j++) {
				num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i)) + QRMath.glog(e.get(j)));
			}
		}
		return new QRPolynomial(num,0);
	}
	mod(e) {
		if (this.getLength() - e.getLength() < 0) {
			return this;
		}
		let ratio = QRMath.glog(this.get(0)) - QRMath.glog(e.get(0));
		let num = new Array(this.getLength());
		for (let i = 0; i < this.getLength(); i++) {
			num[i] = this.get(i);
		}
		for (let i = 0; i < e.getLength(); i++) {
			num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio);
		}
		return new QRPolynomial(num,0).mod(e);
	}
};
let QRRSBlock = class {
	constructor(totalCount, dataCount) {
		this.totalCount = totalCount;
		this.dataCount = dataCount;
	}
	static RS_BLOCK_TABLE = [[1, 26, 19], [1, 26, 16], [1, 26, 13], [1, 26, 9], [1, 44, 34], [1, 44, 28], [1, 44, 22], [1, 44, 16], [1, 70, 55], [1, 70, 44], [2, 35, 17], [2, 35, 13], [1, 100, 80], [2, 50, 32], [2, 50, 24], [4, 25, 9], [1, 134, 108], [2, 67, 43], [2, 33, 15, 2, 34, 16], [2, 33, 11, 2, 34, 12], [2, 86, 68], [4, 43, 27], [4, 43, 19], [4, 43, 15], [2, 98, 78], [4, 49, 31], [2, 32, 14, 4, 33, 15], [4, 39, 13, 1, 40, 14], [2, 121, 97], [2, 60, 38, 2, 61, 39], [4, 40, 18, 2, 41, 19], [4, 40, 14, 2, 41, 15], [2, 146, 116], [3, 58, 36, 2, 59, 37], [4, 36, 16, 4, 37, 17], [4, 36, 12, 4, 37, 13], [2, 86, 68, 2, 87, 69], [4, 69, 43, 1, 70, 44], [6, 43, 19, 2, 44, 20], [6, 43, 15, 2, 44, 16], [4, 101, 81], [1, 80, 50, 4, 81, 51], [4, 50, 22, 4, 51, 23], [3, 36, 12, 8, 37, 13], [2, 116, 92, 2, 117, 93], [6, 58, 36, 2, 59, 37], [4, 46, 20, 6, 47, 21], [7, 42, 14, 4, 43, 15], [4, 133, 107], [8, 59, 37, 1, 60, 38], [8, 44, 20, 4, 45, 21], [12, 33, 11, 4, 34, 12], [3, 145, 115, 1, 146, 116], [4, 64, 40, 5, 65, 41], [11, 36, 16, 5, 37, 17], [11, 36, 12, 5, 37, 13], [5, 109, 87, 1, 110, 88], [5, 65, 41, 5, 66, 42], [5, 54, 24, 7, 55, 25], [11, 36, 12], [5, 122, 98, 1, 123, 99], [7, 73, 45, 3, 74, 46], [15, 43, 19, 2, 44, 20], [3, 45, 15, 13, 46, 16], [1, 135, 107, 5, 136, 108], [10, 74, 46, 1, 75, 47], [1, 50, 22, 15, 51, 23], [2, 42, 14, 17, 43, 15], [5, 150, 120, 1, 151, 121], [9, 69, 43, 4, 70, 44], [17, 50, 22, 1, 51, 23], [2, 42, 14, 19, 43, 15], [3, 141, 113, 4, 142, 114], [3, 70, 44, 11, 71, 45], [17, 47, 21, 4, 48, 22], [9, 39, 13, 16, 40, 14], [3, 135, 107, 5, 136, 108], [3, 67, 41, 13, 68, 42], [15, 54, 24, 5, 55, 25], [15, 43, 15, 10, 44, 16], [4, 144, 116, 4, 145, 117], [17, 68, 42], [17, 50, 22, 6, 51, 23], [19, 46, 16, 6, 47, 17], [2, 139, 111, 7, 140, 112], [17, 74, 46], [7, 54, 24, 16, 55, 25], [34, 37, 13], [4, 151, 121, 5, 152, 122], [4, 75, 47, 14, 76, 48], [11, 54, 24, 14, 55, 25], [16, 45, 15, 14, 46, 16], [6, 147, 117, 4, 148, 118], [6, 73, 45, 14, 74, 46], [11, 54, 24, 16, 55, 25], [30, 46, 16, 2, 47, 17], [8, 132, 106, 4, 133, 107], [8, 75, 47, 13, 76, 48], [7, 54, 24, 22, 55, 25], [22, 45, 15, 13, 46, 16], [10, 142, 114, 2, 143, 115], [19, 74, 46, 4, 75, 47], [28, 50, 22, 6, 51, 23], [33, 46, 16, 4, 47, 17], [8, 152, 122, 4, 153, 123], [22, 73, 45, 3, 74, 46], [8, 53, 23, 26, 54, 24], [12, 45, 15, 28, 46, 16], [3, 147, 117, 10, 148, 118], [3, 73, 45, 23, 74, 46], [4, 54, 24, 31, 55, 25], [11, 45, 15, 31, 46, 16], [7, 146, 116, 7, 147, 117], [21, 73, 45, 7, 74, 46], [1, 53, 23, 37, 54, 24], [19, 45, 15, 26, 46, 16], [5, 145, 115, 10, 146, 116], [19, 75, 47, 10, 76, 48], [15, 54, 24, 25, 55, 25], [23, 45, 15, 25, 46, 16], [13, 145, 115, 3, 146, 116], [2, 74, 46, 29, 75, 47], [42, 54, 24, 1, 55, 25], [23, 45, 15, 28, 46, 16], [17, 145, 115], [10, 74, 46, 23, 75, 47], [10, 54, 24, 35, 55, 25], [19, 45, 15, 35, 46, 16], [17, 145, 115, 1, 146, 116], [14, 74, 46, 21, 75, 47], [29, 54, 24, 19, 55, 25], [11, 45, 15, 46, 46, 16], [13, 145, 115, 6, 146, 116], [14, 74, 46, 23, 75, 47], [44, 54, 24, 7, 55, 25], [59, 46, 16, 1, 47, 17], [12, 151, 121, 7, 152, 122], [12, 75, 47, 26, 76, 48], [39, 54, 24, 14, 55, 25], [22, 45, 15, 41, 46, 16], [6, 151, 121, 14, 152, 122], [6, 75, 47, 34, 76, 48], [46, 54, 24, 10, 55, 25], [2, 45, 15, 64, 46, 16], [17, 152, 122, 4, 153, 123], [29, 74, 46, 14, 75, 47], [49, 54, 24, 10, 55, 25], [24, 45, 15, 46, 46, 16], [4, 152, 122, 18, 153, 123], [13, 74, 46, 32, 75, 47], [48, 54, 24, 14, 55, 25], [42, 45, 15, 32, 46, 16], [20, 147, 117, 4, 148, 118], [40, 75, 47, 7, 76, 48], [43, 54, 24, 22, 55, 25], [10, 45, 15, 67, 46, 16], [19, 148, 118, 6, 149, 119], [18, 75, 47, 31, 76, 48], [34, 54, 24, 34, 55, 25], [20, 45, 15, 61, 46, 16]];
	static getRSBlocks(typeNumber, errorCorrectLevel) {
		let rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel);
		check(rsBlock != undefined, `bad RSBlock @ typeNumber:${typeNumber}/errorCorrectLevel:${errorCorrectLevel}`);
		let length = rsBlock.length / 3;
		let list = [];
		for (let i = 0; i < length; i++) {
			let count = rsBlock[i * 3 + 0];
			let totalCount = rsBlock[i * 3 + 1];
			let dataCount = rsBlock[i * 3 + 2];
			for (let j = 0; j < count; j++) {
				list.push(new QRRSBlock(totalCount,dataCount));
			}
		}
		return list;
	}
	static getRsBlockTable(typeNumber, errorCorrectLevel) {
		switch (errorCorrectLevel) {
		case QRErrorCorrectLevel.L:
			return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0];
		case QRErrorCorrectLevel.M:
			return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1];
		case QRErrorCorrectLevel.Q:
			return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2];
		case QRErrorCorrectLevel.H:
			return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3];
		default:
			return undefined;
		}
	}
};

let QRBitBuffer = class {
	buffer = [];
	length = 0;
	get(index) {
		let bufIndex = Math.floor(index / 8);
		return ((this.buffer[bufIndex] >>> (7 - index % 8)) & 1) == 1;
	}
	put(num, length) {
		for (let i = 0; i < length; i++) {
			this.putBit(((num >>> (length - i - 1)) & 1) == 1);
		}
	}
	getLengthInBits() {
		return this.length;
	}
	putBit(bit) {
		let bufIndex = Math.floor(this.length / 8);
		if (this.buffer.length <= bufIndex) {
			this.buffer.push(0);
		}
		if (bit) {
			this.buffer[bufIndex] |= (0x80 >>> (this.length % 8));
		}
		this.length++;
	}
};
let QRCodeLimitLength = [[17, 14, 11, 7], [32, 26, 20, 14], [53, 42, 32, 24], [78, 62, 46, 34], [106, 84, 60, 44], [134, 106, 74, 58], [154, 122, 86, 64], [192, 152, 108, 84], [230, 180, 130, 98], [271, 213, 151, 119], [321, 251, 177, 137], [367, 287, 203, 155], [425, 331, 241, 177], [458, 362, 258, 194], [520, 412, 292, 220], [586, 450, 322, 250], [644, 504, 364, 280], [718, 560, 394, 310], [792, 624, 442, 338], [858, 666, 482, 382], [929, 711, 509, 403], [1003, 779, 565, 439], [1091, 857, 611, 461], [1171, 911, 661, 511], [1273, 997, 715, 535], [1367, 1059, 751, 593], [1465, 1125, 805, 625], [1528, 1190, 868, 658], [1628, 1264, 908, 698], [1732, 1370, 982, 742], [1840, 1452, 1030, 790], [1952, 1538, 1112, 842], [2068, 1628, 1168, 898], [2188, 1722, 1228, 958], [2303, 1809, 1283, 983], [2431, 1911, 1351, 1051], [2563, 1989, 1423, 1093], [2699, 2099, 1499, 1139], [2809, 2213, 1579, 1219], [2953, 2331, 1663, 1273]];

let check = (condition, message) => {
	if (!condition) {
		throw new Error(message);
	}
};

export let QRCode = class {
	static generate({
		message = '',
		size = 256,
		padding = 16,
		swap = false, /* swap the X and Y modules, some users have had issues with the QR Code */
		ecl = 'M',
		foreground = '#900',
		background = '#fff8f8',
	}) {
		let _checkColor = (c) => {
			return /^#[0-9a-f]{3}(?:[0-9a-f]{3})?$/i.test(c);
		};
		let _getErrorCorrectLevel = (ecl) => {
			switch (ecl) {
			case 'L':
				return QRErrorCorrectLevel.L;
			case 'M':
				return QRErrorCorrectLevel.M;
			case 'Q':
				return QRErrorCorrectLevel.Q;
			case 'H':
				return QRErrorCorrectLevel.H;
			default:
				throw new Error(`unknown error correction level: ${ecl}`);
			}
		};
		let _getTypeNumber = (message, ecl) => {
			let type = 1,
				limit = 0,
				l1 = _getUTF8Length(message),
				l2 = QRCodeLimitLength.length;
			for (let i = 0; i <= l2; i++) {
				let table = QRCodeLimitLength[i];
				check(table, `content too long: expected ${limit} but got ${l1}`);
				switch (ecl) {
				case "L":
					limit = table[0];
					break;
				case "M":
					limit = table[1];
					break;
				case "Q":
					limit = table[2];
					break;
				case "H":
					limit = table[3];
					break;
				default:
					limit = table[0];
				}

				if (l1 <= limit) {
					break;
				}

				type++;
			}

			check(type <= QRCodeLimitLength.length, `content too long`);

			return type;
		};
		let _getUTF8Length = (message) => {
			let result = encodeURI(message).toString().replace(/\%[0-9a-fA-F]{2}/g, 'a');
			return result.length + (result.length != message ? 3 : 0);
		};
		
		check(typeof message == 'string', '"message" must be string');
		check(message.length, '"message" must not be empty');
		/* 7089 >= content.length */
		check(size > 0, '"size" value must be higher than zero');
		check(padding >= 0, '"padding" value must be non-negative');
		check(size > padding, '"padding" value must not be more than "size" value');
		check(_checkColor(foreground), '"foreground" value is not valid');
		check(!background || _checkColor(background), '"background" value is not valid');
		
		// generate QR Code matrix
		let qrcode = new QRCodeModel(_getTypeNumber(message, ecl), _getErrorCorrectLevel(ecl));
		qrcode.addData(message);
		qrcode.make();

		let ns = 'http://www.w3.org/2000/svg';
		let el = (element, attributes = {}) => {
			element = document.createElementNS(ns, element);
			for (let key in attributes) {
				element.setAttribute(key, attributes[key]);
			}
			return element;
		};
		let bit = qrcode.modules,
			length = bit.length,
			_s = ((size - (2 * padding)) / length).toFixed(4),
			_m = [_s, 0, 0, _s, padding, padding],
			_path = '';
		for (let y = 0; y < length; y++) {
			for (let x = 0; x < length; x++) {
				if (bit[x][y]) {
					let _y = y,
						_x = x;
					if (swap) {
						_y = x,
						_x = y;
					}
					_path += 'M' + _x + ',' + _y + 'h1v1h-1v-1z';
				}
			}
		}
		let output = el('svg', {
			'viewBox': [0, 0, size, size].join(' '),
			'width': size,
			'height': size,
			'fill': foreground,
			'shape-rendering': 'crispEdges',
			'xmlns': ns,
			'version': '1.1'
		});
		if (background) {
			output.append(el('path', {
				'fill': background,
				'd': 'M0,0V' + size + 'H' + size + 'V0H0Z'
			}));
		}
		output.append(el('path', {
			'transform': 'matrix(' + _m + ')',
			'd': _path
		}));
		return output;
	}
};