Initial commit for savefile migration

backend/src/persist/migration.rs

@@ -0,0 +1,52 @@
+use std::collections::HashMap;
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize)]
+pub struct OldOnEventJson {
+    pub on_save: Option<String>,
+    pub on_load: Option<String>,
+    pub on_set: Option<String>,
+    pub on_resume: Option<String>,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct OldSettingsJson {
+    pub version: u64,
+    pub name: String,
+    pub persistent: bool,
+    pub cpus: Vec<super::CpuJson>,
+    pub gpu: super::GpuJson,
+    pub battery: super::BatteryJson,
+    pub provider: Option<super::DriverJson>,
+    pub events: Option<OldOnEventJson>,
+}
+
+impl From<&OldSettingsJson> for super::SettingsJson {
+    fn from(old_settings: &OldSettingsJson) -> Self {
+        Self {
+            version: old_settings.version,
+            name: old_settings.name.clone(),
+            variant: 0,
+            persistent: old_settings.persistent,
+            cpus: old_settings.cpus.clone(),
+            gpu: old_settings.gpu.clone(),
+            battery: old_settings.battery.clone(),
+            provider: old_settings.provider.clone(),
+        }
+    }
+}
+
+impl From<&OldSettingsJson> for super::FileJson {
+    fn from(old_settings: &OldSettingsJson) -> Self {
+        let mut variants = HashMap::new();
+        let variant = super::SettingsJson::from(old_settings);
+        variants.insert(0, variant);
+
+        Self {
+            version: 0,
+            name: old_settings.name.clone(),
+            variants,
+        }
+    }
+}

backend/src/persist/mod.rs

@@ -5,6 +5,7 @@ mod error;
 mod file;
 mod general;
 mod gpu;
+mod migration;
 
 pub use battery::{BatteryEventJson, BatteryJson};
 pub use cpu::CpuJson;
@@ -12,7 +13,6 @@ pub use driver::DriverJson;
 pub use file::FileJson;
 pub use general::{MinMaxJson, SettingsJson};
 pub use gpu::GpuJson;
+pub use migration::OldSettingsJson;
 
-pub use error::SerdeError;
-
-pub const LATEST_VERSION: u64 = 0;
+pub use error::{RonError, SerdeError};