Added code to get tag info

src/lib.rs

@@ -2,6 +2,52 @@ pub fn add(left: u64, right: u64) -> u64 {
     left + right
 }
 
+mod meta_type {
+    pub enum Type {
+        Title,
+        Artist,
+        Album,
+        Genre,
+        Year,
+        Track,
+    }
+}
+
+mod meta {
+    use super::*;
+    use taglib;
+
+    pub fn get_meta(t: meta_type::Type, filepath: &String) -> Result<String, taglib::FileError> {
+        match t {
+            meta_type::Type::Title => {
+                match get_file(filepath) {
+                    Ok(file) => {
+                        match get_tag(&file) {
+                            Ok(tag) => {
+                                match tag.title() {
+                                    Some(title) => Ok(title),
+                                    None => Err(taglib::FileError::NoAvailableTag)
+                                }
+                            }
+                            Err(err) => Err(err)
+                        }
+                    }
+                    Err(err) => Err(err)
+                }
+            }
+            _ => Err(taglib::FileError::InvalidFile),
+        }
+    }
+
+    fn get_file(filepath: &String) -> Result<taglib::File, taglib::FileError> {
+        taglib::File::new(filepath)
+    }
+
+    fn get_tag(tag: &taglib::File) -> Result<taglib::Tag, taglib::FileError> {
+        tag.tag()
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;