fuck off, I call that a day.

src/event_processor.rs

@@ -0,0 +1,47 @@
+use std::borrow::Borrow;
+use std::fs;
+use std::fs::File;
+use std::path::PathBuf;
+
+use rusqlite::Connection;
+
+use crate::util::{CustomResult, Error};
+
+// struct
+
+
+fn process_event_file(conn: &mut Connection, file: File) -> CustomResult<()> {
+    return Ok(());
+}
+
+pub fn process_event_files<I>(conn: &mut Connection, paths: I) -> CustomResult<()>
+    where I: Iterator,
+          I::Item: Borrow<PathBuf> {
+    for path in paths {
+        let file = File::open(path.borrow()).map_err(Error::IOError)?;
+        process_event_file(conn, file).unwrap();
+    }
+    Ok(())
+}
+
+
+mod test {
+    use std::fs::File;
+
+    use tempfile::tempfile;
+
+    use super::*;
+
+    fn test_basic_logic(file: File) -> Result<(), Error> {
+        Ok(())
+    }
+
+
+    #[test]
+    fn test_basic() -> CustomResult<()> {
+        let file = tempfile().unwrap();
+        let mut conn = Connection::open_in_memory().unwrap();
+        let ret = process_event_file(&mut conn, file);
+        ret
+    }
+}