1 files changed, 61 insertions, 0 deletions
diff --git a/src/config/mod.rs b/src/config/mod.rs
new file mode 100644
index 0000000..273b9ab
--- /dev/null
+++ b/src/config/mod.rs
@@ -0,0 +1,61 @@
+extern crate serde;
+
+pub mod config;
+pub mod keymap;
+pub mod mimetype;
+pub mod preview;
+pub mod theme;
+
+pub use self::config::JoshutoConfig;
+pub use self::keymap::JoshutoKeymap;
+pub use self::mimetype::JoshutoMimetype;
+pub use self::preview::JoshutoPreview;
+pub use self::theme::{JoshutoColorTheme, JoshutoTheme};
+
+use self::serde::de::DeserializeOwned;
+use std::fs;
+use std::path::{Path, PathBuf};
+
+use CONFIG_HIERARCHY;
+
+// implemented by config file implementations to turn a RawConfig into a Config
+trait Flattenable<T> {
+    fn flatten(self) -> T;
+}
+
+// searches a list of folders for a given file in order of preference
+pub fn search_directories<P>(filename: &str, directories: &[P]) -> Option<PathBuf>
+where
+    P: AsRef<Path>,
+{
+    for path in directories.iter() {
+        let filepath = path.as_ref().join(filename);
+        if filepath.exists() {
+            return Some(filepath);
+        }
+    }
+    None
+}
+
+// parses a config file into its appropriate format
+fn parse_config_file<T, S>(filename: &str) -> Option<S>
+where
+    T: DeserializeOwned + Flattenable<S>,
+{
+    let file_path = search_directories(filename, &CONFIG_HIERARCHY)?;
+    let file_contents = match fs::read_to_string(&file_path) {
+        Ok(content) => content,
+        Err(e) => {
+            eprintln!("Error reading {} file: {}", filename, e);
+            return None;
+        }
+    };
+    let config = match toml::from_str::<T>(&file_contents) {
+        Ok(config) => config,
+        Err(e) => {
+            eprintln!("Error parsing {} file: {}", filename, e);
+            return None;
+        }
+    };
+    Some(config.flatten())
+}