1 files changed, 87 insertions, 0 deletions

diff --git a/src/commands/qr.rs b/src/commands/qr.rs
new file mode 100644
index 0000000..26232ee
--- /dev/null
+++ b/src/commands/qr.rs
@@ -0,0 +1,87 @@
+use poise::serenity_prelude as serenity;
+
+use crate::Data;
+use crate::error::{Error, Result};
+use crate::lang;
+
+type Context<'a> = poise::Context<'a, Data, Error>;
+
+/// QR group
+#[poise::command(slash_command, subcommands("dekodowanie", "generowanie",))]
+pub async fn qr(_ctx: Context<'_>) -> Result<()> {
+    Ok(())
+}
+
+/// Generate a QR code from text
+#[poise::command(slash_command)]
+pub async fn generowanie(
+    ctx: Context<'_>,
+    #[description = "Zawartość kodu QR"] text: String,
+) -> Result<()> {
+    ctx.defer().await?;
+
+    let code = qrcode::QrCode::new(text.as_bytes())?;
+    let image = code.render::<image::Luma<u8>>().build();
+
+    let scaled = image::imageops::resize(
+        &image,
+        image.width() * 10,
+        image.height() * 10,
+        image::imageops::Nearest,
+    );
+
+    let mut buf = std::io::Cursor::new(Vec::new());
+    scaled.write_to(&mut buf, image::ImageFormat::Png)?;
+
+    ctx.send(
+        poise::CreateReply::default()
+            .content(lang::L_QR_GENERATED)
+            .attachment(serenity::CreateAttachment::bytes(
+                buf.into_inner(),
+                "qrcode.png",
+            )),
+    )
+    .await?;
+    Ok(())
+}
+
+/// Decode a QR code from an uploaded image
+#[poise::command(slash_command)]
+pub async fn dekodowanie(
+    ctx: Context<'_>,
+    #[description = "Obraz zawierający kod QR"] image: serenity::Attachment,
+) -> Result<()> {
+    ctx.defer().await?;
+
+    let img_data = ctx
+        .data()
+        .http_client
+        .get(&image.url)
+        .send()
+        .await?
+        .bytes()
+        .await?;
+    let img = image::load_from_memory(&img_data)?;
+    let gray = img.to_luma8();
+
+    let decoded = decode_qr_simple(&gray);
+    match decoded {
+        Some(text) => {
+            ctx.say(lang::fmt_qr_decoded(&text)).await?;
+        }
+        None => {
+            ctx.say(lang::L_QR_DECODE_FAILED).await?;
+        }
+    }
+    Ok(())
+}
+
+fn decode_qr_simple(img: &image::ImageBuffer<image::Luma<u8>, Vec<u8>>) -> Option<String> {
+    rxing::helpers::detect_in_luma(img.as_raw().to_vec(), img.width(), img.height(), None)
+        .ok()
+        .map(|r| r.getText().to_owned())
+}
+
+pub fn commands() -> Vec<poise::Command<Data, Error>> {
+    vec![qr()]
+}