1 files changed, 31 insertions, 1 deletions
diff --git a/dichroism/src/config.rs b/dichroism/src/config.rs
index e5b4046..c3dec51 100644
--- a/dichroism/src/config.rs
+++ b/dichroism/src/config.rs
@@ -1 +1,31 @@
-struct Config {}
+use crate::constants::*;
+use crate::error::DichroismError;
+use crate::result::Result;
+use async_std::fs::metadata;
+use async_std::path::PathBuf;
+use std::env;
+use std::net::SocketAddr;
+
+#[derive(Debug, Clone)]
+pub struct Config {
+    pub db_url: String,
+    pub img_root: PathBuf,
+    pub bind_addr: SocketAddr,
+}
+
+impl Config {
+    pub async fn new_from_env() -> Result<Self> {
+        let img_root = PathBuf::from(env::var(ENV_IMG_ROOT)?);
+        let meta = metadata(&img_root).await?;
+
+        if !meta.is_dir() || meta.permissions().readonly() {
+            return Err(Box::new(DichroismError::InvalidImageRoot));
+        }
+
+        Ok(Config {
+            db_url: env::var(ENV_DB_URL)?,
+            img_root,
+            bind_addr: env::var(ENV_BIND_ADDR)?.parse()?,
+        })
+    }
+}