tsk-45: Identify type of Song (#48)

Closes #45

Reviewed-on: phoenix/icarus_meta#48
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

src/detection/coverart.rs

@@ -1,8 +1,16 @@
 /// Gets the file type of a CoverArt given it's path
-pub fn file_type_from_filepath(filepath: &str) -> Result<String, std::io::Error> {
+pub fn file_type_from_filepath(
+    filepath: &str,
+) -> Result<crate::detection::FileType, std::io::Error> {
     match imghdr::from_file(filepath) {
-        Ok(Some(imghdr::Type::Jpeg)) => Ok(String::from("jpeg")),
-        Ok(Some(imghdr::Type::Png)) => Ok(String::from("png")),
+        Ok(Some(imghdr::Type::Jpeg)) => Ok(crate::detection::FileType {
+            mime: String::from(constants::mime::JPEG),
+            file_type: String::from(constants::JPEG_TYPE),
+        }),
+        Ok(Some(imghdr::Type::Png)) => Ok(crate::detection::FileType {
+            mime: String::from(constants::mime::PNG),
+            file_type: String::from(constants::PNG_TYPE),
+        }),
         Ok(None) => Err(std::io::Error::other("Image file not supported")),
         Err(err) => Err(err),
         _ => Err(std::io::Error::other("Image file not supported")),
@@ -10,15 +18,32 @@ pub fn file_type_from_filepath(filepath: &str) -> Result<String, std::io::Error>
 }
 
 /// Gets the file type of a CoverArt given it's data
-pub fn file_type_from_data(data: &Vec<u8>) -> Result<String, std::io::Error> {
+pub fn file_type_from_data(data: &Vec<u8>) -> Result<crate::detection::FileType, std::io::Error> {
     match imghdr::from_bytes(data) {
-        Some(imghdr::Type::Jpeg) => Ok(String::from("jpeg")),
-        Some(imghdr::Type::Png) => Ok(String::from("png")),
+        Some(imghdr::Type::Jpeg) => Ok(crate::detection::FileType {
+            mime: String::from(constants::mime::JPEG),
+            file_type: String::from(constants::JPEG_TYPE),
+        }),
+        Some(imghdr::Type::Png) => Ok(crate::detection::FileType {
+            mime: String::from(constants::mime::PNG),
+            file_type: String::from(constants::PNG_TYPE),
+        }),
         None => Err(std::io::Error::other("Image file not supported")),
         _ => Err(std::io::Error::other("Image file not supported")),
     }
 }
 
+pub mod constants {
+    pub const PNG_TYPE: &str = "png";
+    pub const JPEG_TYPE: &str = "jpeg";
+    pub const JPG_TYPE: &str = "jpg";
+
+    pub mod mime {
+        pub const JPEG: &str = "image/jpeg";
+        pub const PNG: &str = "image/png";
+    }
+}
+
 #[cfg(test)]
 mod tests {
     #[test]
@@ -30,7 +55,8 @@ mod tests {
         match super::file_type_from_filepath(&filepath) {
             Ok(filetype) => {
                 assert_eq!(
-                    filetype, "png",
+                    filetype.file_type,
+                    super::constants::PNG_TYPE,
                     "The file type of the CoverArt should have been png"
                 );
             }
@@ -50,7 +76,8 @@ mod tests {
         match super::file_type_from_data(&data) {
             Ok(filetype) => {
                 assert_eq!(
-                    filetype, "png",
+                    filetype.file_type,
+                    super::constants::PNG_TYPE,
                     "The file type of the CoverArt should have been png"
                 );
             }