From 9f0f47abaa934b66da5b302236bfc89f95a7f329 Mon Sep 17 00:00:00 2001
From: Justin Wernick <justin@worthe-it.co.za>
Date: Mon, 27 Feb 2023 23:12:32 +0200
Subject: Revamp parsing to support more complex commands

---
 src/main.rs | 37 ++++++++++++++++++++++---------------
 1 file changed, 22 insertions(+), 15 deletions(-)

(limited to 'src/main.rs')

diff --git a/src/main.rs b/src/main.rs
index 93880de..0df2754 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,38 +1,45 @@
-use std::error::Error;
 use std::{io, io::Write};
+use thiserror::Error;
 
-fn prompt() -> Result<(), Box<dyn Error>> {
+mod parser;
+
+use parser::Command;
+
+fn prompt() -> Result<(), ShackleError> {
     print!("> ");
     io::stdout().flush()?;
     Ok(())
 }
 
-fn read_stdin() -> Result<String, Box<dyn Error>> {
+fn read_stdin() -> Result<String, ShackleError> {
     let mut buffer = String::new();
     io::stdin().read_line(&mut buffer)?;
     Ok(buffer)
 }
 
-fn main() -> Result<(), Box<dyn Error>> {
+fn main() -> Result<(), ShackleError> {
     loop {
         prompt()?;
         let user_input = read_stdin()?;
 
-        if user_input.len() == 0 {
-            // control-d or end of input. Needs to be specially handled before
-            // the match because this is identical to whitespace after the trim.
-            break;
-        }
-
-        match user_input.trim() {
-            "" => {}
-            "exit" => {
+        match user_input.parse::<Command>() {
+            Err(unknown_input) => {
+                println!("Unknown input \"{}\"", unknown_input);
+            }
+            Ok(Command::Whitespace) => {}
+            Ok(Command::Exit) => {
                 break;
             }
-            other_input => {
-                println!("Unknown input {}", other_input);
+            Ok(Command::GitInit(repo_name)) => {
+                println!("Successfully created {}.git", repo_name);
             }
         }
     }
     Ok(())
 }
+
+#[derive(Error, Debug)]
+enum ShackleError {
+    #[error(transparent)]
+    IoError(#[from] io::Error),
+}
-- 
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