store refs for ModdedInstance in root config

src/basic_types.rs

@@ -1,8 +1,9 @@
+use clap::builder::Str;
 use serde::{Deserialize, Serialize};
 use std::{
     error::Error,
     fs::{self, read_to_string},
-    io::Write,
+    io::{self, Write},
     path::{Path, PathBuf},
 };
 
@@ -20,7 +21,11 @@ pub struct RootConfig {
     /// Where all mods are stored
     pub mod_location: PathBuf,
 
+    #[serde(default)]
+    pub instances: Vec<InstancePointer>,
+
     /// All available mods
+    #[serde(default)]
     pub mods: Vec<ModConfig>,
 }
 
@@ -40,6 +45,16 @@ impl RootConfig {
     pub fn get_mod_by_id(&self, id: &str) -> Option<ModConfig> {
         self.mods.iter().find(|e| e.id == id).cloned()
     }
+
+    pub fn load_instance_by_id(&self, id: &str) -> Result<ModdedInstance, Box<dyn Error>> {
+        let conf = self
+            .instances
+            .iter()
+            .find(|e| e.id == id)
+            .ok_or("ID not found in root config")?;
+
+        ModdedInstance::load_from_file(&conf.path)
+    }
 }
 
 /// Available game
@@ -48,6 +63,12 @@ pub struct Game {
     pub install_location: PathBuf,
 }
 
+#[derive(Debug, Clone, Deserialize, PartialEq)]
+pub struct InstancePointer {
+    pub id: String,
+    pub path: PathBuf,
+}
+
 /// Config for an available mod
 #[derive(Debug, Clone, Deserialize, PartialEq)]
 pub struct ModConfig {