Add server config for mergable extensions

sync-server/src/utils/is_file_type_mergable.rs

@@ -1,7 +1,10 @@
-pub fn is_file_type_mergable(path_or_file_name: &str) -> bool {
+pub fn is_file_type_mergable(path_or_file_name: &str, mergeable_extensions: &[String]) -> bool {
     let file_extension = path_or_file_name.split('.').next_back().unwrap_or_default();
+    let file_extension_lower = file_extension.to_lowercase();
 
-    matches!(file_extension.to_lowercase().as_str(), "md" | "txt")
+    mergeable_extensions
+        .iter()
+        .any(|ext| ext.to_lowercase() == file_extension_lower)
 }
 
 #[cfg(test)]
@@ -10,14 +13,22 @@ mod tests {
 
     #[test]
     fn test_is_file_type_mergable() {
-        assert!(is_file_type_mergable(".md"));
-        assert!(is_file_type_mergable("hi.md"));
-        assert!(is_file_type_mergable("my/path/to/my/document.md"));
-        assert!(is_file_type_mergable("hi.MD"));
-        assert!(is_file_type_mergable("my/path/to/my/DOCUMENT.MD"));
+        let mergeable = vec!["md".to_owned(), "txt".to_owned()];
 
-        assert!(!is_file_type_mergable(".json"));
-        assert!(!is_file_type_mergable("HELLO.JSON"));
-        assert!(!is_file_type_mergable("my/config.yml"));
+        assert!(is_file_type_mergable(".md", &mergeable));
+        assert!(is_file_type_mergable("hi.md", &mergeable));
+        assert!(is_file_type_mergable(
+            "my/path/to/my/document.md",
+            &mergeable
+        ));
+        assert!(is_file_type_mergable("hi.MD", &mergeable));
+        assert!(is_file_type_mergable(
+            "my/path/to/my/DOCUMENT.MD",
+            &mergeable
+        ));
+
+        assert!(!is_file_type_mergable(".json", &mergeable));
+        assert!(!is_file_type_mergable("HELLO.JSON", &mergeable));
+        assert!(!is_file_type_mergable("my/config.yml", &mergeable));
     }
 }