Generic Importer Trait (#71)

* initial importer trait

* appease linters

* improve file handling. fixes #66

* use size hint

* format + comment

* update serde rename mess

* tested :sunglasses: :rocket:

* small formatting

1 files changed, 11 insertions, 3 deletions

diff --git a/atuin-client/src/import/mod.rs b/atuin-client/src/import/mod.rs
index 0b21d605..d73d3857 100644
--- a/atuin-client/src/import/mod.rs
+++ b/atuin-client/src/import/mod.rs
@@ -1,16 +1,24 @@
-use std::fs::File;
-use std::io::{BufRead, BufReader, Seek, SeekFrom};
+use std::io::{BufRead, BufReader, Read, Seek, SeekFrom};
+use std::path::{Path, PathBuf};
 
 use eyre::Result;
 
+use crate::history::History;
+
 pub mod bash;
 pub mod resh;
 pub mod zsh;
 
 // this could probably be sped up
-fn count_lines(buf: &mut BufReader<File>) -> Result<usize> {
+fn count_lines(buf: &mut BufReader<impl Read + Seek>) -> Result<usize> {
     let lines = buf.lines().count();
     buf.seek(SeekFrom::Start(0))?;
 
     Ok(lines)
 }
+
+pub trait Importer: IntoIterator<Item = Result<History>> + Sized {
+    const NAME: &'static str;
+    fn histpath() -> Result<PathBuf>;
+    fn parse(path: impl AsRef<Path>) -> Result<Self>;
+}