1 files changed, 173 insertions, 0 deletions
diff --git a/src/args.rs b/src/args.rs
new file mode 100644
index 0000000..ae86108
--- /dev/null
+++ b/src/args.rs
@@ -0,0 +1,173 @@
+use crate::auth;
+use crate::listing;
+use clap::{crate_authors, crate_description, crate_name, crate_version};
+use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+use std::path::PathBuf;
+
+/// Possible characters for random routes
+const ROUTE_ALPHABET: [char; 16] = [
+    '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', 'a', 'b', 'c', 'd', 'e', 'f',
+];
+
+/// Checks wether a path is valid, i.e. it exists on the system and points to a file/directory
+fn is_valid_path(path: String) -> Result<(), String> {
+    let path_to_check = PathBuf::from(path);
+    if path_to_check.is_file() || path_to_check.is_dir() {
+        return Ok(());
+    }
+    Err(String::from(
+        "Path either doesn't exist or is not a regular file or a directory",
+    ))
+}
+
+/// Checks wether a port is valid
+fn is_valid_port(port: String) -> Result<(), String> {
+    port.parse::<u16>()
+        .and(Ok(()))
+        .or_else(|e| Err(e.to_string()))
+}
+
+
+/// Checks wether an interface is valid, i.e. it can be parsed into an IP address
+fn is_valid_interface(interface: String) -> Result<(), String> {
+    interface
+        .parse::<IpAddr>()
+        .and(Ok(()))
+        .or_else(|e| Err(e.to_string()))
+}
+
+/// Checks wether the auth string is valid, i.e. it follows the syntax username:password
+fn is_valid_auth(auth: String) -> Result<(), String> {
+    auth.find(':')
+        .ok_or_else(|| "Correct format is username:password".to_owned())
+        .map(|_| ())
+}
+
+/// Parses the command line arguments
+pub fn parse_args() -> crate::MiniserveConfig {
+    use clap::{App, AppSettings, Arg};
+
+    let matches = App::new(crate_name!())
+        .version(crate_version!())
+        .author(crate_authors!())
+        .about(crate_description!())
+        .global_setting(AppSettings::ColoredHelp)
+        .arg(
+            Arg::with_name("verbose")
+                .short("v")
+                .long("verbose")
+                .help("Be verbose, includes emitting access logs"),
+        )
+        .arg(
+            Arg::with_name("PATH")
+                .required(false)
+                .validator(is_valid_path)
+                .help("Which path to serve"),
+        )
+        .arg(
+            Arg::with_name("port")
+                .short("p")
+                .long("port")
+                .help("Port to use")
+                .validator(is_valid_port)
+                .required(false)
+                .default_value("8080")
+                .takes_value(true),
+        )
+        .arg(
+            Arg::with_name("interfaces")
+                .short("i")
+                .long("if")
+                .help("Interface to listen on")
+                .validator(is_valid_interface)
+                .required(false)
+                .takes_value(true)
+                .multiple(true),
+        )
+        .arg(
+            Arg::with_name("auth")
+                .short("a")
+                .long("auth")
+                .validator(is_valid_auth)
+                .help("Set authentication (username:password)")
+                .takes_value(true),
+        )
+        .arg(
+            Arg::with_name("random-route")
+                .long("random-route")
+                .help("Generate a random 6-hexdigit route"),
+        )
+        .arg(
+            Arg::with_name("sort")
+                .short("s")
+                .long("sort")
+                .possible_values(&["natural", "alpha", "dirsfirst"])
+                .default_value("natural")
+                .help("Sort files"),
+        )
+        .arg(
+            Arg::with_name("reverse")
+                .long("reverse")
+                .help("Reverse sorting order"),
+        )
+        .arg(
+            Arg::with_name("no-symlinks")
+                .short("P")
+                .long("no-symlinks")
+                .help("Do not follow symbolic links"),
+        )
+        .get_matches();
+
+    let verbose = matches.is_present("verbose");
+    let no_symlinks = matches.is_present("no-symlinks");
+    let path = matches.value_of("PATH");
+    let port = matches.value_of("port").unwrap().parse().unwrap();
+    let interfaces = if let Some(interfaces) = matches.values_of("interfaces") {
+        interfaces.map(|x| x.parse().unwrap()).collect()
+    } else {
+        vec![
+            IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0)),
+            IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)),
+        ]
+    };
+    let auth = if let Some(auth_split) = matches.value_of("auth").map(|x| x.splitn(2, ':')) {
+        let auth_vec = auth_split.collect::<Vec<&str>>();
+        if auth_vec.len() == 2 {
+            Some(auth::BasicAuthParams {
+                username: auth_vec[0].to_owned(),
+                password: auth_vec[1].to_owned(),
+            })
+        } else {
+            None
+        }
+    } else {
+        None
+    };
+
+    let random_route = if matches.is_present("random-route") {
+        Some(nanoid::custom(6, &ROUTE_ALPHABET))
+    } else {
+        None
+    };
+
+    let sort_method = matches
+        .value_of("sort")
+        .unwrap()
+        .parse::<listing::SortingMethods>()
+        .unwrap();
+
+    let reverse_sort = matches.is_present("reverse");
+
+    crate::MiniserveConfig {
+        verbose,
+        path: PathBuf::from(path.unwrap_or(".")),
+        port,
+        interfaces,
+        auth,
+        path_explicitly_chosen: path.is_some(),
+        no_symlinks,
+        random_route,
+        sort_method,
+        reverse_sort,
+    }
+}