tsk-44: Added detection module

Cargo.lock

@@ -83,10 +83,17 @@ dependencies = [
 name = "icarus_meta"
 version = "0.4.0"
 dependencies = [
+ "imghdr",
  "lofty",
  "tempfile",
 ]
 
+[[package]]
+name = "imghdr"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c8b35f3ad95576ac81603375dfe47a0450b70a368aa34d2b6e5bb0a0d7f02428"
+
 [[package]]
 name = "libc"
 version = "0.2.177"

Cargo.toml

@@ -6,6 +6,7 @@ rust-version = "1.90"
 
 [dependencies]
 lofty = { version = "0.22.4" }
+imghdr = { version = "0.7.0" }
 
 [dev-dependencies]
 tempfile = { version = "3.23.0" }

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;