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40 lines
967 B
40 lines
967 B
const gm = require('@tohru/gm')
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, rr = (min, max) => Math.floor(Math.random() * (max-min + 1) + min)
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, width = 200
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, height = 80;
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function getShape() {
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const x1 = rr(width * 0.1, width * 0.9)
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, y1 = rr(height * 0.1, height * 0.9)
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, size = rr(15, 30)
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, x2 = rr(x1, x1 + size)
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, y2 = rr(y1, y1 + size);
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return { x1, x2, y1, y2 };
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}
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module.exports = (text, captchaId) => {
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return new Promise((resolve, reject) => {
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text = text.split(''); //array of chars
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const x = gm(200, 80, '#fff')
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.fill('#000')
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.fontSize(80)
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for (let i = 0; i <6; i++) {
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x.drawText(i*30, 55+rr(0,10), text[i])
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}
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for (let i = 0; i <4; i++) {
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const shape = getShape();
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x.strokeWidth(rr(3, 5))
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x.drawCircle(shape.x1, shape.y1, shape.x2, shape.y1)
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}
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x.wave(10, rr(50,80))
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.blur(1, 2)
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.crop(200, 80, 0, 0)
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.quality(30)
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.write(`./static/captcha/${captchaId}.jpg`, (err) => {
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if (err) {
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return reject(err);
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}
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return resolve();
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});
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})
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}
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