iocaine 2.0.0

The deadliest poison known to AI
Documentation 
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// SPDX-FileCopyrightText: 2025 Gergely Nagy
// SPDX-FileContributor: Gergely Nagy
//
// SPDX-License-Identifier: MIT

use base64::{engine::general_purpose::STANDARD, Engine as _};
use image::Luma;
use minijinja::{value::Kwargs, Error, ErrorKind, State};
use qrcode::{render::svg, QrCode};
use std::io::Cursor;

pub fn generate(_state: &State, content: String, options: Kwargs) -> Result<String, Error> {
    let format = options
        .get::<Option<String>>("format")?
        .unwrap_or("png".to_string());
    let width: Option<usize> = options.get("width")?;
    let height: Option<usize> = options.get("height")?;

    let code = QrCode::new(content.as_bytes()).unwrap();

    if &format == "png" {
        let image = if let (Some(w), Some(h)) = (width, height) {
            code.render::<Luma<u8>>()
                .max_dimensions(w as u32, h as u32)
                .build()
        } else {
            code.render::<Luma<u8>>().build()
        };

        let mut w: Vec<u8> = Vec::new();
        image
            .write_to(&mut Cursor::new(&mut w), image::ImageFormat::Png)
            .unwrap();

        let image_data = STANDARD.encode(w);
        Ok(format!("data:image/png;base64,{}", image_data))
    } else if &format == "svg" || &format == "svg:raw" {
        let image = if let (Some(w), Some(h)) = (width, height) {
            code.render()
                .max_dimensions(w as u32, h as u32)
                .dark_color(svg::Color("#000000"))
                .light_color(svg::Color("#ffffff"))
                .build()
        } else {
            code.render()
                .dark_color(svg::Color("#000000"))
                .light_color(svg::Color("#ffffff"))
                .build()
        };

        if &format == "svg" {
            let image_data = STANDARD.encode(image);
            Ok(format!("data:image/svg+xml;base64,{}", image_data))
        } else {
            Ok(String::from_utf8(image.into()).unwrap())
        }
    } else {
        Err(Error::new(
            ErrorKind::UndefinedError,
            format!("unknown format: {}", format),
        ))
    }
}