better errors

src/api_interface.rs

@@ -186,7 +186,20 @@ impl TeslaInterface {
                         return;
                     }
                 }
-                error!("Error getting state: {e:#?}")
+
+                match e {
+                    RequestError::StdIo(e) => log::error!("Stdio error: {e:?}"),
+                    RequestError::RonSpanned(e) => log::error!("RON parsing error: {e:?}"),
+                    RequestError::Teslatte(teslatte::error::TeslatteError::DecodeJsonError {
+                        source: _,
+                        request: _,
+                        body,
+                    }) => {
+                        log::error!("Error getting state: {body}")
+                    }
+                    RequestError::Teslatte(e) => log::error!("Teslatte error: {e:?}"),
+                    RequestError::Save(e) => log::error!("Save error: {e:?}"),
+                }
             }
         }
     }
@@ -195,18 +208,11 @@ impl TeslaInterface {
         // refresh our Tesla (the company's web servers, not the car) access token
         if Instant::now().duration_since(self.last_refresh) >= KEY_REFRESH_INTERVAL {
             log::warn!("refreshing keys...");
-            match self.api.refresh().await {
+            if self.api.refresh().await.some_or_print().is_some() {
-                Ok(_) => {
                 let now = Instant::now();
-                    match self.save_key() {
+                if self.save_key().some_or_print().is_some() {
-                        Ok(_) => {
-                            log::warn!("refreshed keys...");
                     self.last_refresh = now;
                 }
-                        Err(e) => error!("error saving auth token: {e:?}"),
-                    }
-                }
-                Err(e) => error!("error refreshing auth token: {e:?}"),
             }
         }
     }

src/errors.rs

@@ -1,5 +1,27 @@
 use thiserror::Error;
 
+pub trait PrintErrors {
+    type Inner;
+    fn some_or_print(self) -> Option<Self::Inner>;
+}
+
+impl<T, E> PrintErrors for Result<T, E>
+where
+    E: std::error::Error,
+{
+    type Inner = T;
+
+    fn some_or_print(self) -> Option<Self::Inner> {
+        match self {
+            Ok(val) => Some(val),
+            Err(e) => {
+                log::error!("{e:?}");
+                None
+            }
+        }
+    }
+}
+
 #[derive(Error, Debug)]
 pub enum SaveError {
     #[error("stdio error")]
@@ -8,15 +30,6 @@ pub enum SaveError {
     RonSpanned(#[from] ron::Error),
 }
 
-impl SaveError {
-    pub fn error_string(&self) -> String {
-        match self {
-            SaveError::StdIo(e) => format!("Error reading access token from disk: {e:?}"),
-            SaveError::RonSpanned(e) => format!("Error deserialising access token: {e:?}"),
-        }
-    }
-}
-
 #[derive(Error, Debug)]
 pub enum AuthLoadError {
     #[error("stdio error")]
@@ -31,18 +44,6 @@ pub enum AuthLoadError {
     NoVehicles,
 }
 
-impl AuthLoadError {
-    pub fn error_string(&self) -> String {
-        match self {
-            AuthLoadError::Teslatte(e) => format!("Error refreshing access token: {e:?}"),
-            AuthLoadError::StdIo(e) => format!("Error reading access token from disk: {e:?}"),
-            AuthLoadError::RonSpanned(e) => format!("Error deserialising access token: {e:?}"),
-            AuthLoadError::Save(e) => e.error_string(),
-            AuthLoadError::NoVehicles => String::from("No vehicles attached to account"),
-        }
-    }
-}
-
 #[derive(Error, Debug)]
 pub enum RequestError {
     #[error("stdio error")]

src/main.rs

@@ -5,6 +5,7 @@ extern crate rocket;
 
 use api_interface::TeslaInterface;
 use clap::{Parser, Subcommand};
+use errors::PrintErrors;
 use pl_interface::Pli;
 use std::path::PathBuf;
 
@@ -51,8 +52,8 @@ async fn main() {
                 ron::ser::to_string_pretty(&Config::default(), Default::default()).unwrap()
             );
         }
-        Commands::Watch => match TeslaInterface::load(auth_path).await {
+        Commands::Watch => {
-            Ok(mut interface) => {
+            if let Some(mut interface) = TeslaInterface::load(auth_path).await.some_or_print() {
                 let config: Config =
                     ron::from_str(&std::fs::read_to_string(&config_path).unwrap()).unwrap();
 
@@ -74,7 +75,7 @@ async fn main() {
                                     _ = interval.tick() => pli.refresh(),
                                     message = pli_receiver.recv() => match message {
                                         Ok(message) => pli.process_request(message),
-                                        Err(e) => error!("Error on receive channel: {e:#?}")
+                                        Err(e) => error!("Error on receive channel: {e:?}")
                                     }
                                 }
                             }
@@ -106,7 +107,7 @@ async fn main() {
                             _ = interval.tick() => interface.refresh().await,
                             message = api_receiver.recv() => match message {
                                 Ok(message) => interface.process_request(message).await,
-                                Err(e) => error!("Error on receive channel: {e:#?}")
+                                Err(e) => error!("Error on receive channel: {e:?}")
                             }
                         }
                     }
@@ -114,7 +115,6 @@ async fn main() {
 
                 server_handle.await;
             }
-            Err(e) => error!("{}", e.error_string()),
+        }
-        },
     }
 }

src/pl_interface.rs

@@ -9,7 +9,7 @@ use serde::{Deserialize, Serialize};
 use serialport::SerialPort;
 use termcolor::WriteColor;
 
-use crate::errors::PliError;
+use crate::errors::{PliError, PrintErrors};
 
 pub struct Pli {
     pub state: Arc<RwLock<PlState>>,
@@ -152,8 +152,7 @@ impl Pli {
     }
 
     pub fn refresh(&mut self) {
-        match self.read_state() {
+        if let Some(new_state) = self.read_state().some_or_print() {
-            Ok(new_state) => {
             self.voltage_gauge.set(new_state.battery_voltage);
             self.target_voltage_gauge.set(new_state.target_voltage);
             self.duty_cycle.set(new_state.duty_cycle);
@@ -165,14 +164,12 @@ impl Pli {
 
             *self.state.write().expect("PLI state handler panicked!!") = new_state;
         }
-            Err(e) => log::error!("State read error: {e:#?}"),
-        }
     }
 
     pub fn process_request(&mut self, message: PliRequest) {
         match message {
-            PliRequest::ReadRam(address) => match self.read_ram(address) {
+            PliRequest::ReadRam(address) => {
-                Ok(data) => {
+                if let Some(data) = self.read_ram(address).some_or_print() {
                     let mut stdout =
                         termcolor::StandardStream::stdout(termcolor::ColorChoice::Always);
                     let _ = stdout.set_color(
@@ -184,8 +181,7 @@ impl Pli {
                         );
                     };
                 }
-                Err(e) => log::error!("RAM read error: {e:?}"),
+            }
-            },
         }
     }
 
@@ -208,10 +204,7 @@ impl Pli {
 
     fn receive<const LENGTH: usize>(&mut self) -> [u8; LENGTH] {
         let mut buf = [0; LENGTH];
-        match self.port.read_exact(&mut buf) {
+        let _ = self.port.read_exact(&mut buf).some_or_print();
-            Ok(_) => {}
-            Err(e) => log::error!("PLI serial read error: {e:#?}"),
-        }
         buf
     }