refactor: split main.rs into more files; add docs

src/input.rs

@@ -0,0 +1,38 @@
+//! Input handling utilities for interactive features.
+//!
+//! This module provides functions for reading raw keyboard input,
+//! particularly for handling arrow keys in the interactive review mode.
+
+use std::io::{self, Read};
+use termion::raw::IntoRawMode;
+
+/// Reads raw keyboard input including arrow keys and special characters.
+/// Handles ANSI escape sequences for arrow keys and returns string representations.
+/// Used for interactive navigation in review mode.
+pub fn read_key_input() -> io::Result<String> {
+    let _stdout = io::stdout().into_raw_mode()?;
+    let mut buffer = [0; 3];
+
+    // Read first byte
+    io::stdin().read_exact(&mut buffer[0..1])?;
+
+    match buffer[0] {
+        27 => {
+            // ESC sequence, read next two bytes
+            io::stdin().read_exact(&mut buffer[1..3])?;
+            match (buffer[1], buffer[2]) {
+                (91, 65) => Ok("up".to_string()),    // ESC[A
+                (91, 66) => Ok("down".to_string()),  // ESC[B
+                (91, 67) => Ok("right".to_string()), // ESC[C
+                (91, 68) => Ok("left".to_string()),  // ESC[D
+                _ => Ok("unknown".to_string()),
+            }
+        }
+        b'\n' | b'\r' => Ok("enter".to_string()),
+        b'q' => Ok("q".to_string()),
+        b'p' => Ok("p".to_string()),
+        b'a' => Ok("a".to_string()),
+        b's' => Ok("s".to_string()),
+        _ => Ok("unknown".to_string()),
+    }
+}