refactor code: move compare_lines into lines.rs

readme.md

@@ -5,3 +5,11 @@ Ndiff is an educational Rust rewrite of the [diff](https://linux.die.net/man/1/d
 Of course, it's no way near as featured as
 the [diff](https://linux.die.net/man/1/diff) command,
 since it's utility is to learn Rust concepts by completing a simple project.
+
+## Installation
+
+You may install and play around with the program using the command line:
+
+```bash
+cargo install --git https://github.com/dnutiu/ndiff
+```

src/line.rs

@@ -1,16 +1,17 @@
-use std::{fmt};
+use itertools::Itertools;
+use std::fmt;
 use std::fmt::{Debug, Formatter};
 use termcolor::{Color, ColorChoice, ColorSpec, StandardStream, WriteColor};
 
 #[derive(Debug)]
 pub(crate) struct MissingLineIndicator {
-    pub value: String
+    pub value: String,
 }
 
 impl Default for MissingLineIndicator {
     fn default() -> Self {
-        MissingLineIndicator{
-            value: String::from("<missing line>")
+        MissingLineIndicator {
+            value: String::from("<missing line>"),
         }
     }
 }
@@ -28,7 +29,6 @@ pub(crate) enum Line {
 }
 
 impl Line {
-
     /// Prints the line to stdout
     pub fn print(&self) {
         match self {
@@ -73,3 +73,29 @@ impl fmt::Display for Line {
         }
     }
 }
+
+/// Compares the lines of two texts.
+///
+/// It returns a [`Vec<Line>`]
+pub fn compare_lines(left_text: &str, right_text: &str) -> Vec<Line> {
+    left_text
+        .lines()
+        .map(String::from)
+        .zip_longest(right_text.lines().map(String::from))
+        .enumerate()
+        .map(|(line_number, item)| -> Line {
+            let missing_line_indicator: MissingLineIndicator = Default::default();
+            let left = item
+                .clone()
+                .left()
+                .unwrap_or(missing_line_indicator.value.clone());
+            let right = item.right().unwrap_or(missing_line_indicator.value);
+
+            if left != right {
+                Line::DifferingLine(line_number as i32 + 1, left, right)
+            } else {
+                Line::MatchedLine(line_number as i32 + 1, left)
+            }
+        })
+        .collect()
+}

src/main.rs

@@ -1,46 +1,20 @@
-use crate::line::{Line, MissingLineIndicator};
-use itertools::Itertools;
+use crate::line::Line;
 use std::fs::read_to_string;
 
 mod line;
 
-/// Gets the lines of two given texts
-///
-/// It returns a [`Vec<Box<Line>>`]
-fn get_lines(left_text: &String, right_text: &String) -> Vec<Line> {
-    left_text
-        .lines()
-        .map(String::from)
-        .zip_longest(right_text.lines().map(String::from))
-        .enumerate()
-        .map(|(line_number, item)| -> Line {
-            let missing_line_indicator: MissingLineIndicator = Default::default();
-            let left = item.clone().left().unwrap_or(missing_line_indicator.value.clone());
-            let right = item.right().unwrap_or(missing_line_indicator.value);
-
-            if left != right {
-                Line::DifferingLine(line_number as i32 + 1, left, right)
-            } else {
-                Line::MatchedLine(line_number as i32 + 1, left)
-            }
-        })
-        .collect()
-}
-
 fn main() {
     let left_file = read_to_string("a.txt").expect("Left file not found");
     let right_file = read_to_string("b.txt").expect("Right file not found");
 
-    let lines: Vec<Line> = get_lines(&left_file, &right_file);
+    let lines: Vec<Line> = line::compare_lines(&left_file, &right_file);
 
     let mut differences_counter: i32 = 0;
     for line in lines.iter() {
         line.print();
         match line {
             Line::MatchedLine(_, _) => {}
-            Line::DifferingLine(_, _, _) => {
-                differences_counter += 1
-            }
+            Line::DifferingLine(_, _, _) => differences_counter += 1,
         }
     }
     println!();