replace commandline arguments with config.lua & add support for changing themes & coloschemes

src/config_parser/mod.rs

@@ -0,0 +1 @@
+pub mod parser;

src/config_parser/parser.rs

@@ -0,0 +1,62 @@
+//! This module provides the functionality to parse the lua config and convert the config options
+//! into rust readable form.
+
+use rlua::Lua;
+use serde::Serialize;
+use std::fs;
+
+#[derive(Serialize, Clone)]
+pub struct Style {
+    pub theme: String,
+    pub colorscheme: String,
+}
+
+impl Style {
+    pub fn new(theme: String, colorscheme: String) -> Self {
+        Style { theme, colorscheme }
+    }
+}
+
+/// A named struct which stores the parsed config file options.
+///
+/// # Fields
+//
+/// * `port` - It stores the parsed port number option on which the server should launch.
+/// * `binding_ip_addr` - It stores the parsed ip address option on which the server should launch
+#[derive(Clone)]
+pub struct Config {
+    pub port: u16,
+    pub binding_ip_addr: String,
+    pub style: Style,
+}
+
+impl Config {
+    /// A function which parses the config.lua file and puts all the parsed options in the newly
+    /// contructed Config struct and returns it.
+    ///
+    /// # Error
+    ///
+    /// Returns a lua parse error if parsing of the config.lua file fails or has a syntax error
+    /// or io error if the config.lua file doesn't exists otherwise it returns a newly contructed
+    /// Config struct with all the parsed config options from the parsed config file.
+    pub fn parse() -> Result<Self, Box<dyn std::error::Error>> {
+        let lua = Lua::new();
+
+        lua.context(|context| {
+            let globals = context.globals();
+
+            context
+                .load(&fs::read_to_string("./websurfx/config.lua")?)
+                .exec()?;
+
+            Ok(Config {
+                port: globals.get::<_, u16>("port")?,
+                binding_ip_addr: globals.get::<_, String>("binding_ip_addr")?,
+                style: Style::new(
+                    globals.get::<_, String>("theme")?,
+                    globals.get::<_, String>("colorscheme")?,
+                ),
+            })
+        })
+    }
+}