Huh wuh (#7)

Reviewed-on: #7

src/app.rs

@@ -0,0 +1,55 @@
+/// Seconds to sleep after finising a task
+pub const SECONDS_TO_SLEEP: u64 = 5;
+
+pub const APP_NAME: &str = "catapult";
+
+pub struct App {
+    pub api_url: String,
+    pub auth_url: String,
+    pub service_username: String,
+    pub service_passphrase: String,
+    pub twilio_config: textsender_models::config::auxiliary::TwilioConfig,
+}
+
+// TODO: Change this to non-async at some point.
+// Will require changes in other libraries
+pub async fn load_app() -> Result<App, std::io::Error> {
+    use textsender_models::envy;
+    let auth_url_env = envy::environment::get_env("AUTH_URL").await;
+    let api_url_env = envy::environment::get_env("API_URL").await;
+    let service_username_env = envy::environment::get_env("SERVICE_USERNAME").await;
+    let service_passphrase_env = envy::environment::get_env("SERVICE_PASSPHRASE").await;
+
+    let envs = vec![
+        auth_url_env,
+        api_url_env,
+        service_username_env,
+        service_passphrase_env,
+    ];
+
+    let check_envs = |vs: &Vec<envy::EnvVar>| -> (bool, Option<String>) {
+        for env in vs {
+            if env.value.is_empty() {
+                return (false, Some(format!("Key {} is not provided", env.key)));
+            }
+        }
+        (true, None)
+    };
+
+    let (envs_valid, reason) = check_envs(&envs);
+
+    if envs_valid {
+        match textsender_models::config::auxiliary::load_config().await {
+            Ok(twilio_config) => Ok(App {
+                api_url: String::new(),
+                auth_url: String::new(),
+                service_username: String::new(),
+                service_passphrase: String::new(),
+                twilio_config: twilio_config,
+            }),
+            Err(err) => Err(err),
+        }
+    } else {
+        Err(std::io::Error::other(reason.unwrap()))
+    }
+}