Streamlined config usage

site/src/config.rs

@@ -0,0 +1,72 @@
+use std::sync::Mutex;
+
+use dotenvy::dotenv;
+use once_cell::sync::Lazy;
+
+struct Config {
+    pub submit_token: String,
+    pub root_path: String,
+    pub username: String,
+    pub email: String,
+    pub bind_port: String,
+    pub accounts: Accounts
+}
+
+struct Accounts {
+    pub github:    Option<String>,
+    pub twitter:   Option<String>,
+    pub mastodon:  Option<String>,
+    pub discord:   Option<String>,
+    pub reddit:    Option<String>,
+}
+
+fn load_config() -> Config {
+    dotenv().expect(".env file not found");
+
+    // return config value or panic if not set
+    let eval_required_conf = |variable_name| {
+        match std::env::var(variable_name) {
+            Ok(_) => {
+                let value = std::env::var(variable_name).unwrap();
+                println!("{}: {}", variable_name, value);
+                return value;
+            },
+            Err(_) => {
+                panic!("{} not set!", variable_name)
+            }
+        }
+    };
+
+    // return optional value
+    let eval_optional_conf = |variable_name| {
+        match std::env::var(variable_name) {
+            Ok(_) => {
+                let value = std::env::var(variable_name).unwrap();
+                println!("{}: {}", variable_name, value);
+                return Some(value);
+            },
+            Err(_) => {
+                return None
+            }
+        }
+    };
+
+    Config {
+        submit_token: eval_required_conf("SUBMIT_TOKEN"),
+        root_path: eval_required_conf("ROOT_PATH"),
+        username: eval_required_conf("USERNAME"),
+        email: eval_required_conf("EMAIL"),
+        bind_port: eval_required_conf("BIND_PORT"),
+        accounts: Accounts {
+            github: eval_optional_conf("GITHUB_ACCOUNT"),
+            discord: eval_optional_conf("DISCORD_ACCOUNT"),
+            twitter: eval_optional_conf("TWITTER_ACCOUNT"),
+            mastodon: eval_optional_conf("MASTODON_ACCOUNT"),
+            reddit: eval_optional_conf("REDDIT_ACCOUNT"),
+        }
+    }
+}
+
+pub static CONFIG: Lazy<Config> = Lazy::new(|| {
+    load_config()
+});