Add complex configuration

Cargo.toml

@@ -1,21 +1,16 @@
 [package]
-name = "lldap"
+authors = ["Valentin Tolmer <valentin@tolmer.fr>", "Steve Barrau <steve.barrau@gmail.com>", "Thomas Wickham <mackwic@gmail.com>"]
 edition = "2018"
+name = "lldap"
 version = "0.1.0"
-authors = [
-  "Valentin Tolmer <valentin@tolmer.fr>",
-  "Steve Barrau <steve.barrau@gmail.com>",
-  "Thomas Wickham <mackwic@gmail.com>"
-]
-
 [dependencies]
-clap = "3.0.0-beta.2"
 actix-web = "3"
 anyhow = "*"
-thiserror="*"
+clap = "3.0.0-beta.2"
 http = "*"
 passablewords = "*"
 serde = "*"
+thiserror = "*"
 tracing = "*"
 tracing-actix-web = "*"
 tracing-log = "*"

lldap_config.toml

@@ -0,0 +1,2 @@
+# LLDAP configuration
+some_text = "ok boomer"

src/infra/configuration.rs

@@ -1,6 +1,30 @@
-#[derive(Debug, Default)]
-pub struct Configuration;
+use anyhow::Result;
+use figment::{
+    providers::{Env, Format, Serialized, Toml},
+    Figment,
+};
+use serde::{Deserialize, Serialize};
 
-pub fn init() -> Configuration {
-    Configuration::default()
+#[derive(Debug, Deserialize, Serialize)]
+pub struct Configuration {
+    secret_pepper: String,
+    some_text: String,
+}
+
+impl Default for Configuration {
+    fn default() -> Self {
+        Configuration {
+            secret_pepper: String::from("secretsecretpepper"),
+            some_text: String::new(),
+        }
+    }
+}
+
+pub fn init() -> Result<Configuration> {
+    let config: Configuration = Figment::from(Serialized::defaults(Configuration::default()))
+        .merge(Toml::file("lldap_config.toml"))
+        .merge(Env::prefixed("LLDAP_"))
+        .extract()?;
+
+    Ok(config)
 }