Initial commit

src/obd2/mod.rs

@@ -0,0 +1,72 @@
+mod device;
+
+type Result<T> = std::result::Result<T, Error>;
+
+#[derive(Default)]
+pub struct Obd2 {
+    device: device::Obd2Basic,
+}
+
+impl Obd2 {
+    pub fn get_vin(&mut self) -> Result<String> {
+        let response = self
+            .device
+            .cmd("0902")?
+            .ok_or(Error::Other("no response to get vin command".to_owned()))?;
+        let mut n_idx = 0;
+        let data: Vec<String> = response
+            .split('\n')
+            .filter_map(|l| l.split_once(':'))
+            .flat_map(|(idx, data)| {
+                if u8::from_str_radix(idx, 16) != Ok(n_idx) {
+                    todo!()
+                }
+                n_idx = (n_idx + 1) % 0x10;
+                data.split_whitespace().map(|s| s.to_owned())
+            })
+            .collect();
+
+        if data.get(0).map(|s| s.as_str()) != Some("49") {
+            todo!()
+        }
+        if data.get(1).map(|s| s.as_str()) != Some("02") {
+            todo!()
+        }
+
+        let vin = String::from_utf8(
+            data.split_at(3)
+                .1
+                .iter()
+                .map(|s| u8::from_str_radix(s, 16).map_err(|e| e.into()))
+                .collect::<Result<_>>()?,
+        )?;
+
+        Ok(vin)
+    }
+}
+
+#[derive(thiserror::Error, Debug)]
+pub enum Error {
+    #[error("Communication error: `{0:?}`")]
+    Communication(device::Error),
+    #[error("Other OBD2 error: `{0}`")]
+    Other(String),
+}
+
+impl From<device::Error> for Error {
+    fn from(e: device::Error) -> Self {
+        Error::Communication(e)
+    }
+}
+
+impl From<std::num::ParseIntError> for Error {
+    fn from(e: std::num::ParseIntError) -> Self {
+        Error::Other(format!("Invalid data recieved: {:?}", e))
+    }
+}
+
+impl From<std::string::FromUtf8Error> for Error {
+    fn from(e: std::string::FromUtf8Error) -> Self {
+        Error::Other(format!("Invalid string recieved: {:?}", e))
+    }
+}