feat: add external vcard-cli

__external/vcard-qr/src/cli.rs

@@ -0,0 +1,47 @@
+use clap::{Parser, ValueEnum};
+use qrcode_generator::QrCodeEcc;
+
+#[derive(Parser)]
+#[command(author, version, about, long_about = None)]
+pub struct Cli {
+    /// The desired name of the output file, sans extension.
+    #[arg(short, long, default_value = "vcard")]
+    pub output_name: String,
+    /// The desired output format of the QR code.
+    #[arg(short, long, value_enum, default_value_t=OutputFormat::Png)]
+    pub format: OutputFormat,
+    /// The desired error correction level.
+    /// Higher levels generate larger QR codes, but make it more likely
+    /// the code will remain readable if it is damaged.
+    #[arg(short, long, value_enum, default_value_t=ErrorCorrection::Low)]
+    pub error_correction: ErrorCorrection,
+    /// The size of the output image, in pixels.
+    #[arg(short, long, default_value = "1024")]
+    pub size: usize,
+}
+
+#[derive(Debug, Clone, ValueEnum)]
+pub enum ErrorCorrection {
+    Low,
+    Medium,
+    High,
+    Max,
+}
+
+#[allow(clippy::from_over_into)]
+impl Into<QrCodeEcc> for ErrorCorrection {
+    fn into(self) -> QrCodeEcc {
+        match self {
+            ErrorCorrection::Low => QrCodeEcc::Low,
+            ErrorCorrection::Medium => QrCodeEcc::Medium,
+            ErrorCorrection::High => QrCodeEcc::Quartile,
+            ErrorCorrection::Max => QrCodeEcc::High,
+        }
+    }
+}
+
+#[derive(Debug, Clone, ValueEnum)]
+pub enum OutputFormat {
+    Png,
+    Svg,
+}