From 80f1c2cf75f3ef491e6a242199f54793eadf1571 Mon Sep 17 00:00:00 2001
From: dvkt <c@dvkt.io>
Date: Fri, 27 Dec 2019 22:17:42 -0800
Subject: [PATCH] .reverse

---
 README.md     |  3 ++-
 src/server.rs | 14 ++++++++++++--
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 1474fb9..2737bca 100644
--- a/README.md
+++ b/README.md
@@ -12,10 +12,11 @@ point it at a directory and it'll serve up all its text files, sub-directories,
 
 special files:
 
-- **header.gph**: if it exists in a directoy, its content will be shown above the directory's content. put ascii art in it.
+- **header.gph**: if it exists in a directory, its content will be shown above the directory's content. put ascii art in it.
 - **footer.gph**: same, but will be shown below a directory's content.
 - **index.gph**: completely replaces a directory's content with what's in this file.
 - **??.gph**: visiting gopher://yoursite/1/dog/ will try to render `dog.gph` on disk.
+- **.reverse**: if this exists, the directory contents will be listed in reverse alphanumeric order. useful for phloggin'.
 
 Any line in a `.gph` file that doesn't contain any tabs (`\t`) and doesn't start with an `i` will get an `i` automatically prefixed, turning it into a gopher information item. 
 
diff --git a/src/server.rs b/src/server.rs
index af0598c..a113be3 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -19,6 +19,9 @@ const MAX_PEEK_SIZE: usize = 1024;
 /// how many bytes to read() from the socket at a time.
 const TCP_BUF_SIZE: usize = 1024;
 
+/// Files not displayed in directory listings.
+const IGNORED_FILES: [&str; 3] = ["header.gph", "footer.gph", ".reverse"];
+
 /// Starts a Gopher server at the specified host, port, and root directory.
 pub fn start(host: &str, port: u16, root: &str) -> Result<()> {
     let addr = format!("{}:{}", host, port);
@@ -127,11 +130,18 @@ where
 
     // sort directory entries
     let mut paths: Vec<_> = fs::read_dir(&path)?.filter_map(|r| r.ok()).collect();
-    paths.sort_by_key(|dir| dir.path());
+    let mut reverse = path.clone();
+    reverse.push_str("/.reverse");
+    if Path::new(&reverse).exists() {
+        paths.sort_by_key(|dir| std::cmp::Reverse(dir.path()));
+    } else {
+        paths.sort_by_key(|dir| dir.path());
+    }
 
     for entry in paths {
         let file_name = entry.file_name();
-        if file_name == "header.gph" || file_name == "footer.gph" {
+        let f = file_name.to_string_lossy().to_string();
+        if IGNORED_FILES.contains(&f.as_ref()) {
             continue;
         }
         let mut path = rel_path.clone();