Added sorting code

src/env/commandlinearguments.rs

@@ -0,0 +1,63 @@
+//! File: env/commandlinearguments.rs
+//! Created On: Thu 26 Dec 2019 09:01:57 PM CET
+//! Last Modfied: Thu 26 Dec 2019 09:01:57 PM CET
+//! Author: Jali <jali@orca-central.de>
+//! Description: Defines the command line arguments that were passed
+
+use clap::ArgMatches;
+use std::str::FromStr;
+
+/**
+ * # Summary
+ * Stores the command line arguments from our
+ * service.
+ */
+pub struct CommandLineArguments {
+    pub no_of_balls: u32,
+}
+
+impl CommandLineArguments {
+    /**
+     * # Summary
+     * Creates a new instance of a CommandLineArguments object either from
+     * the command line or the default configuration
+     *
+     * # Returns
+     * A new ```CommandLineArguments``` object
+     *
+     * # Examples
+     *
+     * ```rust
+     * let cmdargs = CommandLineArguments::new();
+     * ```
+     */
+    pub fn new() -> CommandLineArguments {
+        let matches = CommandLineArguments::parse_command_line();
+
+        CommandLineArguments {
+            no_of_balls: FromStr::from_str(matches.value_of("NOOFBALLS").unwrap_or("1000"))
+                .unwrap(),
+        }
+    }
+
+    /**
+     * # Summary
+     * Parses the command line and returns all matches that fit valid options.
+     *
+     * # Generics
+     * ## Lifetimeparm: 'a
+     * Assures the same lifetime to the return value than the command line.
+     *
+     * # Returns
+     * An *ArgMatches* struct, that contrains all matched arguments.
+     */
+    fn parse_command_line<'a>() -> ArgMatches<'a> {
+        clap_app!(myapp =>
+            (version: "1.0.360.1")
+            (author: "Jali <jali@orca-central.de>")
+            (about: "A naïve algorithm to sort balls in a ballpit by colour")
+            (@arg NOOFBALLS: -n --noofballs +takes_value "Specifies the number of balls in the ballpit")
+        )
+        .get_matches()
+    }
+}