From fbc3be564f3bc6a2617048ea9105ed126c9f134b Mon Sep 17 00:00:00 2001
From: theo <theo.lettermann@gmail.com>
Date: Wed, 28 Aug 2024 23:34:09 +0200
Subject: [PATCH] feat: implement parsing to data structures

---
 .../src/types/serialization_types.rs          | 88 +++++++++++++++++--
 1 file changed, 83 insertions(+), 5 deletions(-)

diff --git a/crates/services-sesam-vitale-sys/src/types/serialization_types.rs b/crates/services-sesam-vitale-sys/src/types/serialization_types.rs
index 65c560d..e28812d 100644
--- a/crates/services-sesam-vitale-sys/src/types/serialization_types.rs
+++ b/crates/services-sesam-vitale-sys/src/types/serialization_types.rs
@@ -1,5 +1,5 @@
 use bitvec::index::BitIdx;
-use std::{error::Error, vec::Vec};
+use std::{error::Error, str::FromStr, vec::Vec};
 
 use deku::{
     bitvec::{BitStore, Msb0},
@@ -10,7 +10,7 @@ use deku::{
 };
 
 #[deku_derive(DekuRead)]
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 #[deku(endian = "big")]
 pub struct GroupId(u16);
 
@@ -26,7 +26,7 @@ impl<T, E: Error> MapToDekuParseError<T> for Result<T, E> {
 
 #[deku_derive(DekuRead)]
 #[derive(Debug, PartialEq)]
-pub struct DekuDataField {
+pub struct DataField {
     #[deku(reader = "read_size(deku::reader)")]
     data_size: ByteSize,
 
@@ -48,8 +48,8 @@ pub struct BlockHeader {
 pub struct DataBlock {
     pub header: BlockHeader,
 
-    #[deku(bytes_read = "header.data_size.0")]
-    pub data: Vec<DekuDataField>,
+    #[deku(ctx = "header.group_id")]
+    pub inner: DataGroup,
 }
 
 fn read_size<R: std::io::Read>(reader: &mut Reader<R>) -> Result<ByteSize, DekuError> {
@@ -77,3 +77,81 @@ fn read_size<R: std::io::Read>(reader: &mut Reader<R>) -> Result<ByteSize, DekuE
         false => Ok(ByteSize(first_byte as usize)),
     }
 }
+
+// Using this as the map function asks deku to parse a datafield
+// We then use the datafield and convert it to the corresponding value
+fn convert_from_data_field<T>(data_field: DataField) -> Result<T, DekuError>
+where
+    T: FromStr,
+    T::Err: Error,
+{
+    let text = String::from_utf8(data_field.data).map_to_deku_parse_error()?;
+    T::from_str(&text).map_to_deku_parse_error()
+}
+
+#[deku_derive(DekuRead)]
+#[derive(Debug, PartialEq)]
+pub struct SSVVersionNumber(#[deku(map = "convert_from_data_field")] u16);
+
+#[deku_derive(DekuRead)]
+#[derive(Debug, PartialEq)]
+pub struct GALSSVersionNumber(#[deku(map = "convert_from_data_field")] u16);
+
+#[deku_derive(DekuRead)]
+#[derive(Debug, PartialEq)]
+pub struct PSSVersionNumber(#[deku(map = "convert_from_data_field")] u16);
+
+#[deku_derive(DekuRead)]
+#[derive(Debug, PartialEq)]
+pub struct ConfigurationHeader {
+    pub ssv_version: SSVVersionNumber,
+    pub galss_version: GALSSVersionNumber,
+    pub pss_version: PSSVersionNumber,
+}
+
+#[deku_derive(DekuRead)]
+#[derive(Debug, PartialEq)]
+pub struct PCSCReaderName(#[deku(map = "convert_from_data_field")] String);
+
+#[deku_derive(DekuRead)]
+#[derive(Debug, PartialEq)]
+pub struct CardType(#[deku(map = "convert_from_data_field")] u8);
+
+#[deku_derive(DekuRead)]
+#[derive(Debug, PartialEq)]
+pub struct PCSCReader {
+    pub name: PCSCReaderName,
+    pub card_type: CardType,
+}
+
+#[deku_derive(DekuRead)]
+#[derive(Debug, PartialEq)]
+pub struct SESAMVitaleComponentID(#[deku(map = "convert_from_data_field")] u16);
+
+#[deku_derive(DekuRead)]
+#[derive(Debug, PartialEq)]
+pub struct SESAMVitaleComponentDescription(#[deku(map = "convert_from_data_field")] String);
+
+#[deku_derive(DekuRead)]
+#[derive(Debug, PartialEq)]
+pub struct SESAMVitaleComponentVersion(#[deku(map = "convert_from_data_field")] String);
+
+#[deku_derive(DekuRead)]
+#[derive(Debug, PartialEq)]
+pub struct SESAMVitaleComponent {
+    pub id: SESAMVitaleComponentID,
+    pub description: SESAMVitaleComponentDescription,
+    pub version: SESAMVitaleComponentVersion,
+}
+
+#[deku_derive(DekuRead)]
+#[derive(Debug, PartialEq)]
+#[deku(ctx = "group_id: GroupId", id = "group_id.0")]
+pub enum DataGroup {
+    #[deku(id = 60)]
+    ConfigurationHeader(ConfigurationHeader),
+    #[deku(id = 67)]
+    PCSCReader(PCSCReader),
+    #[deku(id = 64)]
+    SESAMVitaleComponent(SESAMVitaleComponent),
+}