feat: enhance media management with EXIF data extraction, metadata filtering, and storage path generation

refactor: update configuration handling to use environment variables and improve code organization

libertas_core/src/config.rs

@@ -1,6 +1,9 @@
 use serde::Deserialize;
 
+use crate::error::{CoreError, CoreResult};
+
 #[derive(Deserialize, Clone)]
+#[serde(rename_all = "lowercase")]
 pub enum DatabaseType {
     Postgres,
     Sqlite,
@@ -30,6 +33,48 @@ pub struct ThumbnailConfig {
 
 #[derive(Deserialize, Clone)]
 pub struct Config {
+    #[serde(rename = "DATABASE_URL")]
+    pub database_url: String,
+    
+    #[serde(rename = "DATABASE_DB_TYPE")]
+    pub database_db_type: DatabaseType,
+
+    #[serde(rename = "SERVER_ADDRESS")]
+    pub server_address: String,
+    
+    #[serde(rename = "JWT_SECRET")]
+    pub jwt_secret: String,
+
+    #[serde(rename = "MEDIA_LIBRARY_PATH")]
+    pub media_library_path: String,
+    
+    #[serde(rename = "BROKER_URL")]
+    pub broker_url: String,
+
+    #[serde(default = "default_max_upload_size")]
+    #[serde(rename = "MAX_UPLOAD_SIZE_MB")]
+    pub max_upload_size_mb: u32,
+
+    #[serde(default = "default_storage_quota")]
+    #[serde(rename = "DEFAULT_STORAGE_QUOTA_GB")]
+    pub default_storage_quota_gb: u64,
+
+    #[serde(default = "default_allowed_sort_columns")]
+    #[serde(rename = "ALLOWED_SORT_COLUMNS")]
+    pub allowed_sort_columns: Vec<String>,
+
+    #[serde(flatten)]
+    pub thumbnail_config: Option<ThumbnailConfig>,
+}
+
+fn default_max_upload_size() -> u32 { 100 }
+fn default_storage_quota() -> u64 { 10 }
+fn default_allowed_sort_columns() -> Vec<String> {
+    vec!["created_at".to_string(), "original_filename".to_string()]
+}
+
+#[derive(Clone)]
+pub struct AppConfig {
     pub database: DatabaseConfig,
     pub server_address: String,
     pub jwt_secret: String,
@@ -40,3 +85,29 @@ pub struct Config {
     pub allowed_sort_columns: Option<Vec<String>>,
     pub thumbnail_config: Option<ThumbnailConfig>,
 }
+
+pub fn load_config() -> CoreResult<AppConfig> {
+    // Load the .env file at that specific path
+   let env_path = dotenvy::dotenv()
+        .map_err(|e| CoreError::Config(format!("Failed to load .env file: {}", e)))?;
+
+    println!("Loaded config from {}", env_path.display());
+
+    let config = envy::from_env::<Config>()
+        .map_err(|e| CoreError::Config(format!("Failed to load config from env: {}", e)))?;
+
+    Ok(AppConfig {
+        database: DatabaseConfig {
+            db_type: config.database_db_type,
+            url: config.database_url,
+        },
+        server_address: config.server_address,
+        jwt_secret: config.jwt_secret,
+        media_library_path: config.media_library_path,
+        broker_url: config.broker_url,
+        max_upload_size_mb: Some(config.max_upload_size_mb),
+        default_storage_quota_gb: Some(config.default_storage_quota_gb),
+        allowed_sort_columns: Some(config.allowed_sort_columns),
+        thumbnail_config: config.thumbnail_config,
+    })
+}