From efc287d21d868d4c54fef8c9d2fd9cff59373a1f Mon Sep 17 00:00:00 2001
From: Faustino Aguilar <faustinoaq@gmail.com>
Date: Thu, 30 Mar 2017 07:33:12 -0500
Subject: [PATCH] Add Watcher.scan and event.status

---
 src/watcher.cr | 43 ++++++++++++++++++++++++++-----------------
 1 file changed, 26 insertions(+), 17 deletions(-)

diff --git a/src/watcher.cr b/src/watcher.cr
index 43c490e..100cbd2 100644
--- a/src/watcher.cr
+++ b/src/watcher.cr
@@ -4,9 +4,9 @@ module Watcher
   TIMESTAMPS = {} of String => String
 
   private class WatchEvent
-    property change = false, files = {} of String => String
+    property status = false, files = {} of String => String
     def on_change
-      yield files if change
+      yield files if status
     end
   end
 
@@ -15,25 +15,32 @@ module Watcher
     File.stat(file).mtime.to_s("%Y%m%d%H%M%S")
   end
 
+  private def self.scan(files, event)
+    event.status = false
+    Dir.glob(files) do |file|
+      timestamp = timestamp_for(file)
+      if TIMESTAMPS[file]? && TIMESTAMPS[file] != timestamp
+        TIMESTAMPS[file] = timestamp
+        event.status = true
+        event.files[file] = timestamp
+        puts "🤖  #{file}"
+      elsif TIMESTAMPS[file]?.nil?
+        TIMESTAMPS[file] = timestamp
+        event.status = true
+        event.files[file] = timestamp
+        puts "🤖  watching file: #{file}"
+      end
+    end
+    event
+  end
+
   # Allow to watch file changes using Watcher.watch
   def self.watch(files)
-    files = Dir.glob(files)
-    files.each do |file|
-      TIMESTAMPS[file] = timestamp_for(file)
-    end
     event = WatchEvent.new
     loop do
-      event.change = false
-      event.files.clear
-      files.each do |file|
-        timestamp = timestamp_for(file)
-        if TIMESTAMPS[file]? != timestamp
-          TIMESTAMPS[file] = timestamp
-          event.change = true
-          event.files[file] = timestamp
-        end
-      end
+      event = Watcher.scan(files, event)
       yield event
+      event.files.clear
       sleep 1
     end
   end
@@ -41,5 +48,7 @@ end
 
 # Allow to watch file changes
 def watch(files)
-  Watcher.watch(files)
+  Watcher.watch(files) do |event|
+    yield event
+  end
 end