Rewrite from TypeScript to Rust

src/resource.rs

@@ -0,0 +1,63 @@
+use crate::REPO;
+
+pub type AnyError = Box<dyn std::error::Error>;
+
+pub trait ResourceFile
+where
+    Self: Default + serde::Serialize + serde::de::DeserializeOwned,
+{
+    const FILE_NAME: &'static str;
+
+    fn path() -> std::path::PathBuf {
+        let mut path = std::path::PathBuf::new();
+        path.push(REPO);
+        path.push(Self::FILE_NAME);
+        path
+    }
+
+    /// If the resource file does not exist, use default data and apply these modifications.
+    fn initialize(self) -> Self {
+        self
+    }
+
+    /// Update any legacy settings on load.
+    fn migrate(self) -> Self {
+        self
+    }
+
+    fn load() -> Result<Self, AnyError> {
+        Self::load_from(&Self::path())
+    }
+
+    fn load_from(path: &std::path::PathBuf) -> Result<Self, AnyError> {
+        if !path.exists() {
+            return Ok(Self::default().initialize());
+        }
+        let content = Self::load_raw(path)?;
+        Self::load_from_string(&content)
+    }
+
+    fn load_raw(path: &std::path::PathBuf) -> Result<String, AnyError> {
+        Ok(std::fs::read_to_string(path)?)
+    }
+
+    fn load_from_string(content: &str) -> Result<Self, AnyError> {
+        Ok(ResourceFile::migrate(serde_yaml::from_str(content)?))
+    }
+
+    fn serialize(&self) -> String {
+        serde_yaml::to_string(&self).unwrap()
+    }
+
+    fn save(&self) {
+        let new_content = serde_yaml::to_string(&self).unwrap();
+
+        if let Ok(old_content) = Self::load_raw(&Self::path()) {
+            if old_content == new_content {
+                return;
+            }
+        }
+
+        let _ = std::fs::write(Self::path(), new_content.as_bytes());
+    }
+}