More detailed error message in case of command parse error (#684)

* Refactored `command::parse`

* Removed unnecessary duplication in error msg

* Renamed `NotEnoughArgs` -> `InsufficientArgs`

* Inaccurate var name

* Ditch wordy error prefix

* Use `split_whitespace` instead of regex

* Cleanup unused regex import

* `insert` cmd fails fast

* Refactor: use `and_then` instead of `unwrap`

* Updated `Command::to_string`

* Added `Command::basename`

* Better err msg when running cmd in unsupported view, fully closes #597

* Sort `match` branches by their order in the enum

src/spotify_url.rs

@@ -1,12 +1,29 @@
+use std::fmt;
+
 use crate::spotify::UriType;
 
 use url::{Host, Url};
 
+#[derive(Clone, Serialize, Deserialize, Debug)]
 pub struct SpotifyUrl {
     pub id: String,
     pub uri_type: UriType,
 }
 
+impl fmt::Display for SpotifyUrl {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let type_seg = match self.uri_type {
+            UriType::Album => "album",
+            UriType::Artist => "artist",
+            UriType::Episode => "episode",
+            UriType::Playlist => "playlist",
+            UriType::Show => "show",
+            UriType::Track => "track",
+        };
+        write!(f, "https://open.spotify.com/{}/{}", type_seg, self.id)
+    }
+}
+
 impl SpotifyUrl {
     fn new(id: &str, uri_type: UriType) -> SpotifyUrl {
         SpotifyUrl {
@@ -22,8 +39,8 @@ impl SpotifyUrl {
     /// assert_eq!(result.id, "4uLU6hMCjMI75M1A2tKUQC");
     /// assert_eq!(result.uri_type, URIType::Track);
     /// ```
-    pub fn from_url(s: &str) -> Option<SpotifyUrl> {
-        let url = Url::parse(s).ok()?;
+    pub fn from_url<S: AsRef<str>>(s: S) -> Option<SpotifyUrl> {
+        let url = Url::parse(s.as_ref()).ok()?;
         if url.host() != Some(Host::Domain("open.spotify.com")) {
             return None;
         }