Create a function that will check whether an alias is in a file

This will allow us to pass an alias and grep for it in a given file.
Just a rough outline to start. Added a super basic test and a file in
"testdata" to operate on for testing.

3 files changed, 34 insertions, 2 deletions

diff --git a/src/main.rs b/src/main.rs
index 5e02b38..1677e5c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,6 @@
-use std::io::{self, BufRead};
+use std::io::{self, BufRead, BufReader};
+use std::fs::File;
+use std::path::Path;
 
 #[cfg(test)]
 mod tests;
@@ -34,6 +36,26 @@ fn build_alias(s: &str) -> String {
     alias_line
 }
 
+fn is_alias_in_file(alias: &str, file: &str) -> Result<(), io::Error> {
+    let alias_parts: Vec<&str> = alias.split_whitespace().collect();
+
+    let f = try!(File::open(file));
+    let mut file = BufReader::new(&f);
+    for line in file.lines() {
+        let line = line.unwrap();
+        let split: Vec<&str> = line.split_whitespace().collect();
+
+        // if email is in alias file
+        // return true
+
+        if split[1].starts_with(alias_parts[1]) {
+            println!("booya");
+        }
+    }
+
+    Ok(())
+}
+
 fn main() {
     let stdin = io::stdin();
     let input: Vec<String> = stdin.lock().lines().map(|line| line.unwrap()).collect();
diff --git a/src/tests.rs b/src/tests.rs
index 2e43d35..712b41e 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -1,4 +1,4 @@
-use super::build_alias;
+use super::{build_alias, is_alias_in_file};
 
 #[test]
 fn build_alias_with_only_email() {
@@ -39,3 +39,12 @@ fn build_alias_with_special_characters() {
         build_alias("From: \"O'Strulson, Celty\" <celty@dollars.co>")
     );
 }
+
+
+#[test]
+fn is_alias_in_file_finds_a_match() {
+    is_alias_in_file(
+        "alias farnsworth-hubert Hubert Farnsworth <professor@planetexpress.com>",
+        "./testdata/aliases"
+    );
+}
diff --git a/testdata/aliases b/testdata/aliases
new file mode 100644
index 0000000..a8a08a8
--- /dev/null
+++ b/testdata/aliases
@@ -0,0 +1 @@
+alias farnsworth-hubert Hubert Farnsworth <professor@planetexpress.com>