From 9becb6e3a7cabc9d4ca25f28c324d44516bbb1f2 Mon Sep 17 00:00:00 2001
From: Adrian Malacoda <adrian.malacoda@monarch-pass.net>
Date: Mon, 4 Dec 2017 01:22:39 -0600
Subject: [PATCH] add way to supply downloaded file name, expose whether it's
 cached in return value

---
 src/lib.rs | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 4307f1b..1f515de 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -170,21 +170,34 @@ impl Downloader {
         }
     }
 
-    pub fn get(&self, url: &str) -> PathBuf {
+    pub fn get(&self, url: &str) -> DownloaderResult {
+        let filename = url.get((url.rfind('/').expect("not a valid url") + 1..)).expect("failed to parse filename");
+        self.get_to(url, filename)
+    }
+
+    pub fn get_to(&self, url: &str, filename: &str) -> DownloaderResult {
         if !self.cache.exists() {
             create_dir_all(self.cache.as_path()).expect("failed to create cache directory");
         }
 
-        let filename = url.get((url.rfind('/').expect("not a valid url") + 1..)).expect("failed to parse filename");
         let mut out_path = self.cache.clone();
         out_path.push(filename);
 
-        if !out_path.exists() {
+        let was_cached = out_path.exists();
+        if !was_cached {
             let mut result = reqwest::get(url).expect("failed to download url");
             let mut file = File::create(out_path.as_path()).expect("failed to open file");
             copy(&mut result, &mut file).expect("failed to write file");
         }
 
-        out_path
+        DownloaderResult {
+            out_path: out_path,
+            was_cached: was_cached
+        }
     }
 }
+
+pub struct DownloaderResult {
+    pub out_path: PathBuf,
+    pub was_cached: bool
+}