Merge branch 'parsing-config-file' into 'master'

Parsing config file prototype

See merge request mhart/DancingDroids!32

src/main.rs

@@ -18,6 +18,35 @@ use std::fs;
 use std::io;
 
 mod robot;
+mod world;
+
+/// Parse the config file, generate the world and robot pool.
+fn parse_config(conf: String, pool: &mut Vec<robot::Robot>) -> Result<world::World, &'static str> {
+    let mut lines = conf.lines();
+    // The first line of the config file should be the World.
+    let raw_line: &str = match lines.next() {
+        Some(raw) => raw,
+        None => return Err("Could not read the first line of the config file !"),
+    };
+    let mut tokens = raw_line.split_whitespace();
+    let token1 = match tokens.next() {
+        Some(raw) => raw,
+        None => return Err("Could not read the first token of the first line !"),
+    };
+    let token2 = match tokens.next() {
+        Some(raw) => raw,
+        None => return Err("Could not read the second token of the first line !"),
+    };
+    let x: i32 = match token1.parse::<i32>() {
+        Ok(x) => x,
+        Err(err) => return Err("Could not convert token one from the first string to i32"),
+    };
+    let y: i32 = match token2.parse::<i32>() {
+        Ok(x) => x,
+        Err(err) => return Err("Could not convert token two from the first string to i32"),
+    };
+    Ok(world::World { x, y })
+}
 
 /// Retrieve the content of a file and return it as a string.
 fn open_file(filename: &str) -> io::Result<String> {
@@ -41,7 +70,8 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     let raw_conf = open_file(matches.value_of("file").unwrap_or("two_robots.txt"))?;
 
-    let robot_pool: Vec<robot::Robot> = Vec::new();
+    let mut robot_pool: Vec<robot::Robot> = Vec::new();
+    let world: world::World = parse_config(raw_conf, &mut robot_pool)?;
 
     Ok(())
 }

src/world.rs

@@ -1,5 +1,5 @@
 /// The World is represented here.
 pub struct World {
-    x: i32,
-    y: i32,
+    pub x: i32,
+    pub y: i32,
 }