QR codes

use qr.qweruse qr_svg, qr_svg_colors from qr      // Quillo 0.6: only these

qrcode = { version = "0.14", default-features = false, features = ["svg"] }

// A QR code for a link, served as an image and shown in a page.////   quillo run qr.qwe      then open http://localhost:8080/use "qr.qwer"route GET /qr.svg ? { text: str = "https://quillolang.org" } =    respond(200, qr_svg(text, 256)?, { "content-type": "image/svg+xml", "cache-control": "max-age=86400" })route GET / = <html><body>    <h1>Scan to open the docs</h1>    <div style="width: 200px">{raw(qr_svg_colors("https://quillolang.org/docs/", 200, "#1b1630", "#f7f3e8")?)}</div>    <img src="/qr.svg?text=WIFI%3AT%3AWPA%3BS%3ACafe%3BP%3Asecret%3B%3B" width="160" alt="Join the café's Wi-Fi"/></body></html>

//! QR codes as SVG: links, tickets, payments, Wi-Fi and two-factor set-up, sharp at any size.//! version: 1.0.0//!//! [dependencies]//! qrcode = { version = "0.14", default-features = false, features = ["svg"] }use qrcode::render::svg;use qrcode::{EcLevel, QrCode};fn code(text: &str, level: &str) -> Result<QrCode, String> {    let ec = match level { "L" | "l" => EcLevel::L, "Q" | "q" => EcLevel::Q, "H" | "h" => EcLevel::H, _ => EcLevel::M };    QrCode::with_error_correction_level(text.as_bytes(), ec).map_err(|e| e.to_string())}/// An SVG image of `text` as a QR code, at least `size` pixels wide, dark on light; put it in a page with `raw(...)` or serve it as image/svg+xml.pub fn qr_svg(text: &str, size: i64) -> Result<String, String> {    qr_svg_colors(text, size, "#000000", "#ffffff")}/// The same, in the colours given (CSS colours), with error correction "M"; use a dark colour on a light one for scanners.pub fn qr_svg_colors(text: &str, size: i64, dark: &str, light: &str) -> Result<String, String> {    let s = size.clamp(32, 4096) as u32;    Ok(code(text, "M")?.render::<svg::Color>().min_dimensions(s, s).dark_color(svg::Color(dark)).light_color(svg::Color(light)).build())}/// The QR code drawn in text, for a terminal or a log: `quillo run` printing a link to scan.pub fn qr_text(text: &str) -> Result<String, String> {    Ok(code(text, "L")?.render::<char>().quiet_zone(true).module_dimensions(2, 1).dark_color('█').light_color(' ').build())}/// The text a phone's camera joins a Wi-Fi network from (`WPA` security), for a QR code by the door.pub fn wifi_qr_text(ssid: &str, password: &str) -> String {    let esc = |s: &str| s.replace('\\', "\\\\").replace(';', "\\;").replace(',', "\\,").replace(':', "\\:").replace('"', "\\\"");    format!("WIFI:T:WPA;S:{};P:{};;", esc(ssid), esc(password))}