Document config

src/config.rs

@@ -1,9 +1,8 @@
 use anyhow::{Context, Result};
 use serde::Deserialize;
-use std::env;
-use std::fs::File;
-use std::io::BufReader;
+use std::{env, fs::File, io::BufReader};
 
+/// Email server credentials.
 #[derive(Deserialize)]
 pub struct EmailServer {
     pub server_name: String,
@@ -11,30 +10,35 @@ pub struct EmailServer {
     pub password: String,
 }
 
+/// UTC offset for time formatting.
 #[derive(Deserialize)]
 pub struct UtcOffset {
     pub hours: i8,
     pub minutes: i8,
 }
 
+/// Error messages for localization.
 #[derive(Deserialize)]
 pub struct ErrorMessages {
     pub captcha_error: String,
     pub email_error: String,
 }
 
+/// Field localization strings in a form with label and invalid feedback on wrong field input.
 #[derive(Deserialize)]
 pub struct Field {
     pub label: String,
     pub invalid_feedback: String,
 }
 
+/// Localization strings.
 #[derive(Deserialize)]
 pub struct Strings {
     pub description: String,
     pub title: String,
     pub name_field: Field,
     pub email_field: Field,
+    /// No invalid feedback because it is optional.
     pub telefon_field_label: String,
     pub message_field: Field,
     pub captcha_field: Field,
@@ -42,13 +46,19 @@ pub struct Strings {
     pub success: String,
 }
 
+/// Configuration.
 #[derive(Deserialize)]
 pub struct Config {
+    /// The language tag of the HTML file.
     pub lang: String,
+    /// The path prefix of all routes.
     pub path_prefix: String,
+    /// The server socket address including port.
     pub socket_address: String,
     pub email_server: EmailServer,
+    /// From mailbox.
     pub email_from: String,
+    /// To mailbox.
     pub email_to: String,
     pub log_file: String,
     pub utc_offset: UtcOffset,
@@ -57,16 +67,17 @@ pub struct Config {
 }
 
 impl Config {
-    pub fn new() -> Result<Self> {
+    pub fn build() -> Result<Self> {
+        // The environment variable with the path to the config file.
         let config_file_var = "CF_CONFIG_FILE";
         let config_path = env::var(config_file_var)
             .with_context(|| format!("Environment variable {config_file_var} missing!"))?;
 
-        let config_file = File::open(&config_path)
+        let file = File::open(&config_path)
             .with_context(|| format!("Can not open the config file at the path {config_path}"))?;
-        let config_reader = BufReader::new(config_file);
-        let config: Self = serde_yaml::from_reader(config_reader)
-            .context("Can not parse the YAML config file!")?;
+        let reader = BufReader::new(file);
+        let config =
+            serde_yaml::from_reader(reader).context("Can not parse the YAML config file!")?;
 
         Ok(config)
     }

src/mailer.rs

@@ -13,7 +13,7 @@ pub struct Mailer {
 }
 
 impl Mailer {
-    pub fn new(config: &Config) -> Result<Self> {
+    pub fn build(config: &Config) -> Result<Self> {
         let creds = Credentials::new(
             config.email_server.email.clone(),
             config.email_server.password.clone(),

src/states.rs

@@ -13,8 +13,8 @@ pub struct AppState {
 
 impl AppState {
     pub fn build() -> Result<Self> {
-        let config = Config::new()?;
-        let mailer = Arc::new(Mailer::new(&config)?);
+        let config = Config::build()?;
+        let mailer = Arc::new(Mailer::build(&config)?);
 
         let config = Arc::new(config);
         let captcha_solutions = Arc::new(Mutex::new(CaptchaSolutions::default()));