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/var/lang/lib/node_modules/npm/node_modules/qrcode-terminal/lib
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main.js3.0 KB
main.js3.0 KB · 101 lines
1var QRCode = require('./../vendor/QRCode'),2    QRErrorCorrectLevel = require('./../vendor/QRCode/QRErrorCorrectLevel'),3    black = "\033[40m  \033[0m",4    white = "\033[47m  \033[0m",5    toCell = function (isBlack) {6        return isBlack ? black : white;7    },8    repeat = function (color) {9        return {10            times: function (count) {11                return new Array(count).join(color);12            }13        };14    },15    fill = function(length, value) {16        var arr = new Array(length);17        for (var i = 0; i < length; i++) {18            arr[i] = value;19        }20        return arr;21    };22 23module.exports = {24 25    error: QRErrorCorrectLevel.L,26 27    generate: function (input, opts, cb) {28        if (typeof opts === 'function') {29            cb = opts;30            opts = {};31        }32 33        var qrcode = new QRCode(-1, this.error);34        qrcode.addData(input);35        qrcode.make();36 37        var output = '';38        if (opts && opts.small) {39            var BLACK = true, WHITE = false;40            var moduleCount = qrcode.getModuleCount();41            var moduleData = qrcode.modules.slice();42 43            var oddRow = moduleCount % 2 === 1;44            if (oddRow) {45                moduleData.push(fill(moduleCount, WHITE));46            }47 48            var platte= {49                WHITE_ALL: '\u2588',50                WHITE_BLACK: '\u2580',51                BLACK_WHITE: '\u2584',52                BLACK_ALL: ' ',53            };54 55            var borderTop = repeat(platte.BLACK_WHITE).times(moduleCount + 3);56            var borderBottom = repeat(platte.WHITE_BLACK).times(moduleCount + 3);57            output += borderTop + '\n';58 59            for (var row = 0; row < moduleCount; row += 2) {60                output += platte.WHITE_ALL;61 62                for (var col = 0; col < moduleCount; col++) {63                    if (moduleData[row][col] === WHITE && moduleData[row + 1][col] === WHITE) {64                        output += platte.WHITE_ALL;65                    } else if (moduleData[row][col] === WHITE && moduleData[row + 1][col] === BLACK) {66                        output += platte.WHITE_BLACK;67                    } else if (moduleData[row][col] === BLACK && moduleData[row + 1][col] === WHITE) {68                        output += platte.BLACK_WHITE;69                    } else {70                        output += platte.BLACK_ALL;71                    }72                }73 74                output += platte.WHITE_ALL + '\n';75            }76 77            if (!oddRow) {78                output += borderBottom;79            }80        } else {81            var border = repeat(white).times(qrcode.getModuleCount() + 3);82 83            output += border + '\n';84            qrcode.modules.forEach(function (row) {85                output += white;86                output += row.map(toCell).join(''); 87                output += white + '\n';88            });89            output += border;90        }91 92        if (cb) cb(output);93        else console.log(output);94    },95 96    setErrorLevel: function (error) {97        this.error = QRErrorCorrectLevel[error] || this.error;98    }99 100};101