Add youtube.rs for YouTube support

src/input/youtube.rs

@@ -0,0 +1,62 @@
+//! YouTube URL 輸入
+
+use anyhow::Result;
+use std::process::Command;
+
+pub struct YouTubeInput {
+    url: Option<String>,
+    title: Option<String>,
+    duration: Option<u64>,
+}
+
+impl YouTubeInput {
+    pub fn new() -> Self {
+        Self {
+            url: None,
+            title: None,
+            duration: None,
+        }
+    }
+
+    pub fn parse(&mut self, url: &str) -> Result<String> {
+        if !Self::is_youtube_url(url) {
+            anyhow::bail!("Not a valid YouTube URL");
+        }
+        
+        self.url = Some(url.to_string());
+        
+        let info = self.get_video_info(url)?;
+        self.title = Some(info.0);
+        self.duration = Some(info.1);
+        
+        Ok(url.to_string())
+    }
+
+    fn is_youtube_url(url: &str) -> bool {
+        url.contains("youtube.com") || url.contains("youtu.be")
+    }
+
+    fn get_video_info(&self, url: &str) -> Result<(String, u64)> {
+        let output = Command::new("yt-dlp")
+            .args(["--dump-json", "--no-download", url])
+            .output()?;
+        
+        if !output.status.success() {
+            anyhow::bail!("Failed to get video info");
+        }
+        
+        let json: serde_json::Value = serde_json::from_slice(&output.stdout)?;
+        let title = json["title"].as_str().unwrap_or("Unknown").to_string();
+        let duration = json["duration"].as_u64().unwrap_or(0);
+        
+        Ok((title, duration))
+    }
+
+    pub fn get_title(&self) -> Option<&str> {
+        self.title.as_deref()
+    }
+
+    pub fn get_duration(&self) -> Option<u64> {
+        self.duration
+    }
+}