create cache module

src/cache.rs

@@ -0,0 +1,34 @@
+use crate::structs::{Cache, StoredGameData};
+use std::{fs, path::Path};
+
+pub fn get_cache(dir: &Path) -> Cache {
+    let cache_path = dir.join("awcache.json");
+    let cache_content = fs::read_to_string(cache_path).unwrap_or_default();
+    if cache_content.trim().is_empty() {
+        Cache::default()
+    } else {
+        serde_json::from_str(&cache_content).unwrap_or_default()
+    }
+}
+
+pub fn save_cache(dir: &Path, cache: Cache) {
+    let cache_path = dir.join("awcache.json");
+    let cache_serialized = serde_json::to_string_pretty(&cache).unwrap();
+    fs::write(cache_path, cache_serialized).unwrap_or_else(|e| {
+        error!("Failed to save cache: {}", e);
+    });
+}
+
+pub fn get_stored_data() -> Option<StoredGameData> {
+    let dir = std::env::current_dir().ok()?;
+    let cache = get_cache(&dir);
+    cache.stored_data
+}
+
+pub fn store_game_data(data: &StoredGameData) -> Result<(), Box<dyn std::error::Error>> {
+    let dir = std::env::current_dir()?;
+    let mut cache = get_cache(&dir);
+    cache.stored_data = Some((*data).clone());
+    save_cache(&dir, cache);
+    Ok(())
+}