tsk-44: Added detection module

src/detection/coverart.rs

@@ -0,0 +1,20 @@
+/// Gets the file type of a CoverArt given it's path
+pub fn file_type(filepath: &str) -> Result<String, 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(None) => {
+            Err(std::io::Error::other("Image file not supported"))
+        }
+        Err(err) => {
+            Err(err)
+        }
+        _ => {
+            Err(std::io::Error::other("Image file not supported"))
+        }
+    }
+}

src/detection/mod.rs

@@ -0,0 +1 @@
+pub mod coverart;

src/lib.rs

@@ -1,3 +1,4 @@
+pub mod detection;
 pub mod meta;
 pub mod properties;
 pub mod types;