tsk-45: Added another function

src/detection/song.rs

@@ -1,10 +1,11 @@
+/// Gets the file type of a Song from it's path
 pub fn file_type_from_filepath(
     filepath: &str,
 ) -> Result<crate::detection::FileType, std::io::Error> {
     match infer::get_from_path(filepath) {
         Ok(Some(kind)) => {
             let mime = kind.mime_type();
-            if mime == "audio/x-flac" {
+            if mime == constants::mime::FLAC {
                 Ok(crate::detection::FileType {
                     mime: String::from(mime),
                     file_type: String::from(constants::FLAC_TYPE),
@@ -18,8 +19,32 @@ pub fn file_type_from_filepath(
     }
 }
 
+/// Gets the file type of a Song given it's data
+pub fn file_type_from_data(data: &Vec<u8>) -> Result<crate::detection::FileType, std::io::Error> {
+    match infer::get(data) {
+        Some(kind) => {
+            let mime = kind.mime_type();
+            if mime == constants::mime::FLAC {
+                Ok(crate::detection::FileType {
+                    mime: String::from(mime),
+                    file_type: String::from(constants::FLAC_TYPE)
+                })
+            } else {
+                Err(std::io::Error::other("Unsupported file type"))
+            }
+        }
+        None => {
+            Err(std::io::Error::other("File type not determined"))
+        }
+    }
+}
+
 pub mod constants {
     pub const FLAC_TYPE: &str = "flac";
+
+    pub mod mime {
+        pub const FLAC: &str = "audio/x-flac";
+    }
 }
 
 #[cfg(test)]