feat(backend) move module scheduler

backend/server/src/scheduler/scheduler_error.rs

@@ -0,0 +1,47 @@
+use std::{
+    error::Error,
+    fmt::{Debug, Display, Formatter},
+    sync::PoisonError,
+};
+
+use crate::scheduler::scheduler_error::SchedulerError::MutexPoison;
+
+pub enum SchedulerError {
+    IdNotFound,
+    IdAlreadyRunning,
+    MutexPoison(String),
+}
+
+impl<T> From<PoisonError<T>> for SchedulerError {
+    fn from(value: PoisonError<T>) -> Self {
+        MutexPoison(value.to_string())
+    }
+}
+
+impl Debug for SchedulerError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl Display for SchedulerError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{}",
+            match self {
+                SchedulerError::IdNotFound => {
+                    "SchedulerError::IdNotFound".to_string()
+                }
+                SchedulerError::IdAlreadyRunning => {
+                    "SchedulerError::IdAlreadyRunning".to_string()
+                }
+                MutexPoison(str) => {
+                    format!("SchedulerError::MutexPoison: {}", str)
+                }
+            }
+        )
+    }
+}
+
+impl Error for SchedulerError {}