From 41b25cd9845007a08547d18f1afd60236de564a6 Mon Sep 17 00:00:00 2001
From: primardj <b00168148@mytudublin.ie>
Date: Fri, 5 Apr 2024 20:12:55 +0100
Subject: [PATCH] make a parser for sv

---
 01_phase_rust_src/sv/src/main.rs        |  12 ++-
 01_phase_rust_src/sv/src/parser.rs      | 118 ++++++++++++++++++++++++
 01_phase_rust_src/sv/src/parser/misc.rs |   5 +
 3 files changed, 134 insertions(+), 1 deletion(-)
 create mode 100644 01_phase_rust_src/sv/src/parser.rs
 create mode 100644 01_phase_rust_src/sv/src/parser/misc.rs

diff --git a/01_phase_rust_src/sv/src/main.rs b/01_phase_rust_src/sv/src/main.rs
index 2d4c1e6..20097a0 100644
--- a/01_phase_rust_src/sv/src/main.rs
+++ b/01_phase_rust_src/sv/src/main.rs
@@ -1,7 +1,17 @@
 
+//mod misc;
+mod parser;
+
 use std::env;
 
 fn main() {
     let args: Vec<String> = env::args().collect();
-    dbg!(args);
+
+    // args
+    let arg_parser: Vec<String> = parser::parse_args(args);
+
+    dbg!(arg_parser);
+
+    
+    //dbg!(args);
 }
diff --git a/01_phase_rust_src/sv/src/parser.rs b/01_phase_rust_src/sv/src/parser.rs
new file mode 100644
index 0000000..aa2a608
--- /dev/null
+++ b/01_phase_rust_src/sv/src/parser.rs
@@ -0,0 +1,118 @@
+
+
+mod misc;
+
+use std::process::exit;
+
+pub fn parse_args(args: Vec<String>) -> Vec<String>{
+    let mut i: i8 = 0;
+
+    let mut parser: Vec<String> = Vec::new();
+    let mut tmpstr: String;
+
+    for arg in args.iter() {
+        if i == 0 {
+            i += 1;
+        }
+        else if i == 1 {
+            tmpstr = parse_args_1(arg);
+
+            if tmpstr == "--" {
+                i += 1;
+            }
+            if tmpstr == "-w" {
+                // i = 4 signifie, take next word, and return to i = 1.
+                i = 4;
+            }
+            
+            if tmpstr != "--" && tmpstr != "" {
+                parser.push(tmpstr);
+            }
+            else if tmpstr == "" {
+                // We are actually in phase II. Do exactly the same if it was phase II.
+                parser.push(phase2(arg));
+                i = 3;
+            }
+        }
+        else if i == 2 {
+            parser.push(phase2(arg));
+            i += 1;
+        }
+        else if i == 3 {
+            // phase 3, everything is a service name.
+            parser.push(arg.to_string());
+        }
+        else if i == 4 {
+            // 4. push arg and return to stage 1.
+            parser.push(arg.to_string());
+            i = 1;
+
+        }
+    }
+
+    return parser;
+}
+
+fn phase2(arg: &String) -> String {
+    let tmpstr: String;
+    tmpstr = parse_args_2(arg);
+
+    if tmpstr == "INVALID" {
+        misc::usage();
+        exit(100);
+
+    }
+
+    return tmpstr
+    
+}
+
+pub fn parse_args_1(arg: &String) -> String{
+    // Get a string
+    // Return a vect ('first_char', 'length', 'entry_necessary')
+    
+
+    let ch1 = arg.chars().next().unwrap();
+    
+    //println!("{}", ch1);
+
+    if ch1 == '-' && arg.len() >= 2{
+        return (&arg[..2]).to_string()
+    } else if ch1 == '-' {
+        return ch1.to_string()
+    }
+
+    println!("{}",arg);
+    return "".to_string()
+
+
+}
+
+
+pub fn parse_args_2(arg: &String) -> String{
+    let possible: Vec<&str> = vec!["start", "stop", "reload", "restart", "shutdown", "force-stop", "force-reload", "force-restart", "force-shutdown", "try-restart"];
+    let cpossible: Vec<char> = vec!['s', 'u', 'd', 'o', 'p', 'c', 'h', 'a', 'i', 'q', '1', '2', 't', 'k'];
+
+
+        
+    for var in possible.iter() {
+        if arg == var {
+            return var.to_string()
+        }
+    }
+
+
+    let ch1 = arg.chars().next().unwrap();
+
+
+    for var in cpossible.iter() {
+        if ch1 == *var {
+            return ch1.to_string()
+        }
+    }
+
+
+    return "INVALID".to_string()
+
+
+}
diff --git a/01_phase_rust_src/sv/src/parser/misc.rs b/01_phase_rust_src/sv/src/parser/misc.rs
new file mode 100644
index 0000000..9fcd81d
--- /dev/null
+++ b/01_phase_rust_src/sv/src/parser/misc.rs
@@ -0,0 +1,5 @@
+
+
+pub fn usage() {
+    println!("usage: sv [-v] [-w sec] command service ...\n")
+}