From 6d5c9a730c45c21ff23c9a6b1f54fb47460df15d Mon Sep 17 00:00:00 2001
From: gabe <gabevenberg@gmail.com>
Date: Fri, 29 Jul 2022 14:39:04 -0500
Subject: [PATCH] made minigrep project.

---
 the_book/minigrep/Cargo.toml  |  8 ++++
 the_book/minigrep/poem.txt    |  9 ++++
 the_book/minigrep/src/lib.rs  | 90 +++++++++++++++++++++++++++++++++++
 the_book/minigrep/src/main.rs | 18 +++++++
 4 files changed, 125 insertions(+)
 create mode 100644 the_book/minigrep/Cargo.toml
 create mode 100644 the_book/minigrep/poem.txt
 create mode 100644 the_book/minigrep/src/lib.rs
 create mode 100644 the_book/minigrep/src/main.rs

diff --git a/the_book/minigrep/Cargo.toml b/the_book/minigrep/Cargo.toml
new file mode 100644
index 0000000..a256566
--- /dev/null
+++ b/the_book/minigrep/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/the_book/minigrep/poem.txt b/the_book/minigrep/poem.txt
new file mode 100644
index 0000000..8707527
--- /dev/null
+++ b/the_book/minigrep/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/the_book/minigrep/src/lib.rs b/the_book/minigrep/src/lib.rs
new file mode 100644
index 0000000..b5a1b8e
--- /dev/null
+++ b/the_book/minigrep/src/lib.rs
@@ -0,0 +1,90 @@
+use std::error::Error;
+use std::env;
+use std::fs;
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.filename)?;
+    let results = if config.ignore_case {
+        search_case_insensitive(&config.query, &contents)
+    } else {
+        search(&config.query, &contents)
+    };
+    for line in results {
+        println!("{}", line);
+    }
+    Ok(())
+}
+
+pub struct Config {
+    pub query: String,
+    pub filename: String,
+    pub ignore_case: bool,
+}
+
+impl Config {
+    pub fn new(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("Not enough arguments");
+        }
+        let query = args[1].clone();
+        let filename = args[2].clone();
+        let ignore_case = env::var("IGNORE_CASE").is_ok();
+        Ok(Config { query, filename, ignore_case })
+    }
+}
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+pub fn search_case_insensitive<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let query = query.to_lowercase();
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.to_lowercase().contains(&query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn one_result() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Duct tape.";
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+
+    #[test]
+    fn case_insensitive() {
+        let query = "rUsT";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Trust me.";
+
+        assert_eq!(
+            vec!["Rust:", "Trust me."],
+            search_case_insensitive(query, contents)
+        );
+    }
+}
diff --git a/the_book/minigrep/src/main.rs b/the_book/minigrep/src/main.rs
new file mode 100644
index 0000000..7d5e0a2
--- /dev/null
+++ b/the_book/minigrep/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::new(&args).unwrap_or_else(|err| {
+        eprintln!("Problem parsing arguments: {}", err);
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config){
+        eprintln!("Application error: {}", e);
+        process::exit(1);
+    }
+}