72 lines
1.5 KiB
JavaScript
72 lines
1.5 KiB
JavaScript
|
const Utils = require('./utils')
|
||
|
|
|
||
|
|
const BLOCK_CHAR = {
|
||
|
|
WW: ' ',
|
||
|
|
WB: '▄',
|
||
|
|
BB: '█',
|
||
|
|
BW: '▀'
|
||
|
|
}
|
||
|
|
|
||
|
|
const INVERTED_BLOCK_CHAR = {
|
||
|
|
BB: ' ',
|
||
|
|
BW: '▄',
|
||
|
|
WW: '█',
|
||
|
|
WB: '▀'
|
||
|
|
}
|
||
|
|
|
||
|
|
function getBlockChar (top, bottom, blocks) {
|
||
|
|
if (top && bottom) return blocks.BB
|
||
|
|
if (top && !bottom) return blocks.BW
|
||
|
|
if (!top && bottom) return blocks.WB
|
||
|
|
return blocks.WW
|
||
|
|
}
|
||
|
|
|
||
|
|
exports.render = function (qrData, options, cb) {
|
||
|
|
const opts = Utils.getOptions(options)
|
||
|
|
let blocks = BLOCK_CHAR
|
||
|
|
if (opts.color.dark.hex === '#ffffff' || opts.color.light.hex === '#000000') {
|
||
|
|
blocks = INVERTED_BLOCK_CHAR
|
||
|
|
}
|
||
|
|
|
||
|
|
const size = qrData.modules.size
|
||
|
|
const data = qrData.modules.data
|
||
|
|
|
||
|
|
let output = ''
|
||
|
|
let hMargin = Array(size + (opts.margin * 2) + 1).join(blocks.WW)
|
||
|
|
hMargin = Array((opts.margin / 2) + 1).join(hMargin + '\n')
|
||
|
|
|
||
|
|
const vMargin = Array(opts.margin + 1).join(blocks.WW)
|
||
|
|
|
||
|
|
output += hMargin
|
||
|
|
for (let i = 0; i < size; i += 2) {
|
||
|
|
output += vMargin
|
||
|
|
for (let j = 0; j < size; j++) {
|
||
|
|
const topModule = data[i * size + j]
|
||
|
|
const bottomModule = data[(i + 1) * size + j]
|
||
|
|
|
||
|
|
output += getBlockChar(topModule, bottomModule, blocks)
|
||
|
|
}
|
||
|
|
|
||
|
|
output += vMargin + '\n'
|
||
|
|
}
|
||
|
|
|
||
|
|
output += hMargin.slice(0, -1)
|
||
|
|
|
||
|
|
if (typeof cb === 'function') {
|
||
|
|
cb(null, output)
|
||
|
|
}
|
||
|
|
|
||
|
|
return output
|
||
|
|
}
|
||
|
|
|
||
|
|
exports.renderToFile = function renderToFile (path, qrData, options, cb) {
|
||
|
|
if (typeof cb === 'undefined') {
|
||
|
|
cb = options
|
||
|
|
options = undefined
|
||
|
|
}
|
||
|
|
|
||
|
|
const fs = require('fs')
|
||
|
|
const utf8 = exports.render(qrData, options)
|
||
|
|
fs.writeFile(path, utf8, cb)
|
||
|
|
}
|