From de900a725acd01a0fd7c1a5a978c8449c47d3a85 Mon Sep 17 00:00:00 2001
From: Hippolyte Chauvin <hchauvin38@outlook.fr>
Date: Sat, 28 Oct 2023 14:35:43 +0200
Subject: [PATCH] =?UTF-8?q?Premi=C3=A8re=20version=20du=20parser?=
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Capable de découper des mots en fonction des whitespaces
---
 src/main.rs   |  8 +++++++-
 src/parser.rs | 48 ++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 53 insertions(+), 3 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index e7a11a9..71ac746 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,9 @@
+mod parser;
+
 fn main() {
-    println!("Hello, world!");
+    let command_line = String::from("ls -l");
+
+    let command_line_as_array: Vec<String> = parser::parse(&command_line);
+
+    println!("{:?}", command_line_as_array);
 }
diff --git a/src/parser.rs b/src/parser.rs
index ebf7ac5..97a4bf6 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -1,3 +1,47 @@
-pub fn parse(command_line: String) -> Vec<String> {
-    todo!();
+fn parse_after_whitespace(char_splitted_command_line: &mut Vec<char>, argv: &mut Vec<String>) -> Vec<String> {
+    let current_char_option = char_splitted_command_line.pop();
+
+    if current_char_option.is_none() {
+        argv.to_vec()
+    } else {
+        let current_char = current_char_option.unwrap();
+
+        if current_char.is_whitespace() {
+            parse_after_whitespace(char_splitted_command_line, argv)
+        } else {
+            parse_initial_state(char_splitted_command_line, &mut String::from(current_char.to_string()), argv)
+        }
+    }
+}
+
+fn parse_initial_state(char_splitted_command_line: &mut Vec<char>, current_arg: &mut String, argv: &mut Vec<String>) -> Vec<String> {
+    let current_char_option = char_splitted_command_line.pop();
+
+    if current_char_option.is_none() {
+        argv.push(current_arg.to_string());
+        argv.to_vec()
+    } else {
+        let current_char = current_char_option.unwrap();
+        if current_char.is_whitespace() {
+            argv.push(current_arg.to_string());
+            parse_after_whitespace(char_splitted_command_line, argv)
+        } else {
+            current_arg.push(current_char);
+            parse_initial_state(char_splitted_command_line, current_arg, argv)
+        }
+    }
+}
+
+fn split_string_in_chars(string_to_split: &String) -> Vec<char> {
+    string_to_split.chars().rev().collect()
+}
+
+pub fn parse(command_line: &String) -> Vec<String> {
+    let mut argv: Vec<String> = Vec::new();
+    let mut char_splitted_command_line: Vec<char> = split_string_in_chars(&command_line);
+    let mut new_arg = String::new();
+
+    argv = parse_initial_state(&mut char_splitted_command_line, &mut new_arg, &mut argv);
+
+    argv
 }