Get the full integration working for real

Rename `handle_alias` to `write_alias` and implement the function. This
function integrates all our steps together and writes our new alias if
we have one.

Alter our `main` function to remove some of the old code. Don't convert
STDIN to a vector. That was naïve. Instead iterate over its lines
directly. Handle all our errors with either a "no news is good news" or
a panic.

1 files changed, 13 insertions, 10 deletions

diff --git a/src/main.rs b/src/main.rs
index cba6d9e..547bae7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -63,7 +63,12 @@ impl Alias {
     }
 }
 
-fn handle_alias(s: &str) {
+fn write_alias(from: String) -> Result<(), AliasSearchError> {
+    let mut alias = Alias::new(&from);
+    let similar_aliases = try!(find_alias_in_file(&alias, "./testaliases"));
+    alias.update_alias_id(similar_aliases);
+    try!(alias.write_to_file("./testaliases"));
+    Ok(())
 }
 
 #[derive(Debug)]
@@ -128,17 +133,15 @@ fn find_alias_in_file(alias: &Alias, file: &str) -> Result<Vec<String>, AliasSea
 
 fn main() {
     let stdin = io::stdin();
-    let input: Vec<String> = stdin.lock().lines().map(|line| line.unwrap()).collect();
 
-    for line in &input {
+    for line in stdin.lock().lines() {
+        let line = line.unwrap();
         if line.starts_with("From: ") {
-            println!("!!!!!!!! {}", line);
-            // run matcher function
-            handle_alias(line);
+            match write_alias(line) {
+                Ok(_)  => return,
+                Err(AliasSearchError::NotFound) | Err(AliasSearchError::EmailExists) => return,
+                Err(e) => panic!(e),
+            };
         }
     }
-
-    for l in &input {
-        println!("{}", l);
-    }
 }