From 04c136467587d54cc328a12b415ee6f895987339 Mon Sep 17 00:00:00 2001
From: Will Crichton <wcrichto@cs.stanford.edu>
Date: Thu, 22 Aug 2024 17:35:54 -0700
Subject: [PATCH 1/2] Add Logger data structure

---
 .gitignore                |  2 +-
 crates/chatbot/src/lib.rs | 23 ++++++++++++++++++++++-
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index 869df07..3d91d49 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,2 @@
 /target
-Cargo.lock
\ No newline at end of file
+log.txt
\ No newline at end of file
diff --git a/crates/chatbot/src/lib.rs b/crates/chatbot/src/lib.rs
index 13c321f..c9bd6c1 100644
--- a/crates/chatbot/src/lib.rs
+++ b/crates/chatbot/src/lib.rs
@@ -1,5 +1,5 @@
 use rand::{rngs::SmallRng, Rng, SeedableRng};
-use std::{cell::RefCell, path::PathBuf, time::Duration};
+use std::{cell::RefCell, io, path::PathBuf, time::Duration};
 
 thread_local! {
     static RNG: RefCell<SmallRng> = RefCell::new(SmallRng::from_entropy());
@@ -58,3 +58,24 @@ impl Chatbot {
         ]
     }
 }
+
+/// Holds chat messages and writes them to disk infrequently.
+#[derive(Default)]
+pub struct Logger {
+    logs: Vec<String>,
+}
+
+impl Logger {
+    /// Saves the message to the logger.
+    pub fn append(&mut self, message: &str) {
+        self.logs.push(message.to_string());
+    }
+
+    /// Potentially writes the logs to disk, if needed.
+    pub async fn save(&self) -> io::Result<()> {
+        if self.logs.len() % 3 == 0 {
+            tokio::fs::write("log.txt", self.logs.join("\n")).await?;
+        }
+        Ok(())
+    }
+}

From 47547c2992a3e84f41c15dfd2347c73cc9e18962 Mon Sep 17 00:00:00 2001
From: Will Crichton <wcrichto@cs.stanford.edu>
Date: Mon, 26 Aug 2024 14:22:12 -0700
Subject: [PATCH 2/2] Restore Cargo.lock to gitignore

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index 3d91d49..04f3846 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /target
+Cargo.lock
 log.txt
\ No newline at end of file