feat: add verb concept

wfassoc/src/win32/concept.rs

@@ -834,7 +834,80 @@ impl FromStr for FileName {
         }
 
         // Build self and return
-        Ok(Self { filename: s.to_string() })
+        Ok(Self {
+            filename: s.to_string(),
+        })
+    }
+}
+
+// endregion
+
+// region: Verb
+
+pub type BadVerbError = ParseVerbError;
+
+/// The struct representing a verb when manipulating file
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct Verb {
+    /// The validated verb name.
+    verb: String,
+}
+
+impl Verb {
+    pub const OPEN: LazyLock<Verb> = LazyLock::new(|| Verb::new("open").expect("unexpected bad verb"));
+    pub const EDIT: LazyLock<Verb> = LazyLock::new(|| Verb::new("edit").expect("unexpected bad verb"));
+    pub const PLAY: LazyLock<Verb> = LazyLock::new(|| Verb::new("play").expect("unexpected bad verb"));
+}
+
+impl Verb {
+    /// Create a new verb.
+    ///
+    /// `verb` is the verb for validating.
+    /// This function will validate whether given verb is legal.
+    pub fn new(verb: &str) -> Result<Self, BadVerbError> {
+        Self::from_str(verb)
+    }
+
+    /// Get the validated verb name.
+    pub fn inner(&self) -> &str {
+        &self.verb
+    }
+}
+
+/// The error occurs when constructing Verb with bad verb name.
+#[derive(Debug, TeError)]
+#[error("given verb \"{inner}\" is illegal")]
+pub struct ParseVerbError {
+    inner: String,
+}
+
+impl ParseVerbError {
+    fn new(inner: &str) -> Self {
+        Self {
+            inner: inner.to_string(),
+        }
+    }
+}
+
+impl Display for Verb {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        self.verb.fmt(f)
+    }
+}
+
+impl FromStr for Verb {
+    type Err = ParseVerbError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        static RE: LazyLock<Regex> = LazyLock::new(|| {
+            Regex::new(r"^[a-zA-Z0-9_-]+$").expect("unexpected bad regex pattern string")
+        });
+        match RE.captures(s) {
+            Some(_) => Ok(Self {
+                verb: s.to_string(),
+            }),
+            None => Err(ParseVerbError::new(s)),
+        }
     }
 }
 

wfassoc/tests/concept.rs

@@ -254,3 +254,25 @@ fn test_file_name() {
 }
 
 // endregion
+
+// region: Verb
+
+#[test]
+fn test_verb() {
+    fn ok_tester(s: &str) {
+        let rv = Verb::from_str(s);
+        assert!(rv.is_ok());
+        let rv = rv.unwrap();
+        assert_eq!(s, rv.inner());
+    }
+    fn err_tester(s: &str) {
+        let rv = Verb::from_str(s);
+        assert!(rv.is_err());
+    }
+
+    ok_tester("Open");
+    ok_tester("open");
+    err_tester("Space Name");
+}
+
+// endregion