Moved parameter reader into own file

src/configuration.rs

@@ -1,7 +1,72 @@
-//! File: configuration.rs
+//! File: settings.rs
-//! Description: Definition file for the configuration namespace
+//! Description: Defines a stuct that holds all of the configuration settings passed to the program
-//! Author:Jali <jali@orca-central.de>
+//!              by  line.
-//! Created On: Tue 04 Jun 2019 10:06:53 pm CEST
+//! Author: Jali <jali@orcacentral.de>
-//! Last Modified: Tue 04 Jun 2019 10:06:53 pm CEST
+//! Created On: Tue 04 Jun 2019 10:30:46 pm CEST
+//! Last Modified: TIMESTAMP
 
-pub mod configuration;
+use clap::ArgMatches;
+use std::str::FromStr;
+
+/**
+ * Stores the configuration needed for the server.
+ */
+pub struct Settings {
+    pub foreground: bool,
+    pub listen: String,
+    pub plugins: Vec<String>,
+    pub port: i32,
+}
+
+impl Settings {
+    /**
+     * # Description
+     *
+     * Creates a new instance of a Settings object either from 
+     * the command line, or the default configuration.
+     *
+     * # Returns 
+     *
+     * A new ```Settings``` object
+     *
+     * # Exanples
+     *
+     * ```rust
+     * let settings = Settings::create();
+     * ```
+     */
+    pub fn create() -> Settings {
+            let matches = Settings::parse_command_line();
+
+            Settings {
+                foreground: matches.is_present("FOREGROUND"),
+                listen: matches.value_of("LISTEN").unwrap_or("default").to_owned(),
+                plugins: matches.value_of("PLUGIN").unwrap_or("filesystem").split(",").map(|s| s.to_string()).collect(),
+                port: FromStr::from_str(matches.value_of("PORT").unwrap_or("70")).unwrap()
+            }
+    }
+
+
+    /**
+     * # Description
+     * 
+     * Parses the command line and returns all matches that fit the known  
+     * options
+     *
+     * # returns
+     * A collection of matches.
+     */
+     fn parse_command_line<'a>() -> ArgMatches<'a> {
+         // Read the configuration from the command line
+        clap_app!(myapp => 
+            (version: "0.1")
+            (author: "jali@orca-central.de")
+            (about: "A simple modular gopher server, that pushes converted web-content to a client")
+            (@arg FOREGROUND: -f --foreground "Keeps the service in the foreground")
+            (@arg LISTEN: -l --listen +takes_value "Specifies the interface to listn on. Is either a hostname or an address-pattern.")
+            (@arg PLUGIN: -u --plugins +takes_value +required "A comma separated list of plugins to load.")
+            (@arg PORT: -p --port +takes_value "Specifies the port the server listens on. Default is 70")
+         )
+         .get_matches()
+    }
+}

src/configuration/settings.rs

@@ -1,15 +0,0 @@
-//! File: settings.rs
-//! Description: Defines a stuct that holds all of the configuration settings passed to the program
-//!              by command line.
-//! Author: Jali <jali@orca-central.de>
-//! Created On: Tue 04 Jun 2019 10:30:46 pm CEST
-//! Last Modified: TIMESTAMP
-
-/**
- * Defines a data stucture to to store the configuration in.
- */
-pub struct settings {
-    Foreground: bool,
-    Plugins: Vec<String>,
-    Port: i32,
-}

src/main.rs

@@ -1,57 +1,20 @@
+#[macro_use]
 extern crate clap;
+mod configuration;
 
-use clap::{App, Arg, ArgMatches};
+use crate::configuration::Settings;
 
 /**
  * Initiates an instance of the gopherbridge server and
  * starts listening for connections on the given port.
  */
 fn main() {
-    let matches = parse_command_line();
+    let settings = Settings::create();
-    let pluginlist = matches.value_of("PLUGIN");
-    let port = matches.value_of("PORT");
 
-    match port {
+    println!("Program listens on {}", settings.listen);
-        None => println!("Default port 70 used"),
+    println!("Loading plugins {:?}", settings.plugins);
-        Some(p) => println!("Using port {}", p),
+    println!("Listening on port {}", settings.port);
-    }
+    if settings.foreground {
-
+        println!("Server runs in the foreground");
-    match pluginlist {
-        None => println!("No plugins given"),
-        Some(p) => println!("Loading the following plugins: {}", p),
     }
 }
-
-/**
- * Defines the command line parameters passed to the server and creates the
- * server lines
- */
-fn parse_command_line<'a>() -> ArgMatches<'a> {
-    return App::new("gopherbridge")
-        .version("0.1")
-        .author("jali@orca-central.de")
-        .about("a simple modular gopher server, that pushes converted web-content to a client")
-        .arg(
-            Arg::with_name("FORGROUND")
-                .short("f")
-                .long("foreground")
-                .help("Keeps the service in the foreground")
-                .takes_value(false),
-        )
-        .arg(
-            Arg::with_name("PLUGIN")
-                .short("l")
-                .long("plugins")
-                .value_name("PLUGINLIST")
-                .takes_value(true)
-                .index(1),
-        )
-        .arg(
-            Arg::with_name("PORT")
-                .short("p")
-                .long("port")
-                .help("Specifies the port the server listens on. Default is 70")
-                .takes_value(true),
-        )
-        .get_matches();
-}