feat: Convert QrData into Qr data image source url (#1674)

crates/router/src/utils.rs

@@ -5,6 +5,7 @@ pub mod ext_traits;
 #[cfg(feature = "kv_store")]
 pub mod storage_partitioning;
 
+use base64::Engine;
 pub use common_utils::{
     crypto,
     ext_traits::{ByteSliceExt, BytesExt, Encode, StringExt, ValueExt},
@@ -12,7 +13,9 @@ pub use common_utils::{
     validation::validate_email,
 };
 use error_stack::{IntoReport, ResultExt};
+use image::Luma;
 use nanoid::nanoid;
+use qrcode;
 use serde::de::DeserializeOwned;
 
 pub use self::ext_traits::{OptionExt, ValidateCall};
@@ -155,3 +158,46 @@ pub fn to_currency_base_unit_asf64(
 pub fn get_payment_attempt_id(payment_id: impl std::fmt::Display, attempt_count: i16) -> String {
     format!("{payment_id}_{attempt_count}")
 }
+
+#[derive(Debug)]
+pub struct QrImage {
+    pub data: String,
+}
+
+impl QrImage {
+    pub fn new_from_data(
+        data: String,
+    ) -> Result<Self, error_stack::Report<common_utils::errors::QrCodeError>> {
+        let qr_code = qrcode::QrCode::new(data.as_bytes())
+            .into_report()
+            .change_context(common_utils::errors::QrCodeError::FailedToCreateQrCode)?;
+
+        // Renders the QR code into an image.
+        let qrcode_image_buffer = qr_code.render::<Luma<u8>>().build();
+        let qrcode_dynamic_image = image::DynamicImage::ImageLuma8(qrcode_image_buffer);
+
+        let mut image_bytes = Vec::new();
+
+        // Encodes qrcode_dynamic_image and write it to image_bytes
+        let _ = qrcode_dynamic_image.write_to(&mut image_bytes, image::ImageOutputFormat::Png);
+
+        let image_data_source = format!(
+            "{},{}",
+            consts::QR_IMAGE_DATA_SOURCE_STRING,
+            consts::BASE64_ENGINE.encode(image_bytes)
+        );
+        Ok(Self {
+            data: image_data_source,
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::utils;
+    #[test]
+    fn test_image_data_source_url() {
+        let qr_image_data_source_url = utils::QrImage::new_from_data("Hyperswitch".to_string());
+        assert!(qr_image_data_source_url.is_ok());
+    }
+}