From 4f76460efa869317bd7065b4770c16d0146a92da Mon Sep 17 00:00:00 2001
From: Akshay <nerdy@peppe.rs>
Date: Tue, 21 Jul 2020 20:33:22 +0530
Subject: add help command

---
 src/command.rs | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

(limited to 'src/command.rs')

diff --git a/src/command.rs b/src/command.rs
index f856b00..29908f4 100644
--- a/src/command.rs
+++ b/src/command.rs
@@ -59,15 +59,16 @@ pub enum Command {
     Delete(String),
     TrackUp(String),
     TrackDown(String),
+    Help(Option<String>),
     Quit,
     Blank,
 }
 
 #[derive(Debug)]
 pub enum CommandLineError {
-    InvalidCommand(String),
-    InvalidArg(u32), // position
-    NotEnoughArgs(String, u32),
+    InvalidCommand(String),     // command name
+    InvalidArg(u32),            // position
+    NotEnoughArgs(String, u32), // command name, required no. of args
 }
 
 impl std::error::Error for CommandLineError {}
@@ -134,6 +135,12 @@ impl Command {
                 }
                 return Ok(Command::TrackDown(args[0].to_string()));
             }
+            "h" | "?" | "help" => {
+                if args.is_empty() {
+                    return Ok(Command::Help(None));
+                }
+                return Ok(Command::Help(Some(args[0].to_string())));
+            }
             "mprev" | "month-prev" => return Ok(Command::MonthPrev),
             "mnext" | "month-next" => return Ok(Command::MonthNext),
             "q" | "quit" => return Ok(Command::Quit),
-- 
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