Create query module

src/cmus/query.rs

@@ -0,0 +1,40 @@
+use std::str::FromStr;
+use crate::cmus::{CmusError, Track};
+use crate::cmus::player_settings::PlayerSettings;
+
+/// This struct is used to store the row status response from cmus.
+/// So we don't parse it and take the time then we don't need it.
+/// We only parse it when we need it.
+#[derive(Debug, PartialEq, Default)]
+pub struct CmusQueryResponse {
+    track_row: String,
+    player_settings_row: String,
+}
+
+impl FromStr for CmusQueryResponse {
+    type Err = String;
+
+    #[inline]
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let sep_index = s.find("set ").ok_or("Corrupted cmus response")?;
+
+        Ok(Self {
+            track_row: s[..sep_index].to_string(),
+            player_settings_row: s[sep_index..].to_string(),
+        })
+    }
+}
+
+impl CmusQueryResponse {
+    /// Actually process and parse the track info, from the cmus response.
+    #[inline(always)]
+    pub fn track(&self) -> Result<Track, CmusError> {
+        Track::from_str(&self.track_row)
+    }
+
+    /// Actually process and parse the player settings, from the cmus response.
+    #[inline(always)]
+    pub fn player_settings(&self) -> Result<PlayerSettings, CmusError> {
+        PlayerSettings::from_str(&self.player_settings_row)
+    }
+}