utils: watcher

Author: krishpranav

src/utils/watcher.cr

@@ -0,0 +1,37 @@
+# -----------------------------------------------------------------------
+# This file is part of MoonScript
+#
+# MoonSript is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# MoonSript is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with MoonSript.  If not, see <https://www.gnu.org/licenses/>.
+#
+# Copyright (C) 2025 Krisna Pranav, MoonScript Developers
+# -----------------------------------------------------------------------
+
+module MoonScript
+    class Watcher
+       @patterns = Array(String) = [] of String
+       @state = Set(Tuple(String, Time)).new
+
+       def initialize(&@listener: Proc(Array(String), Symbol, Nil))
+       end
+
+       def patterns=(@patterns: Array(String))
+            @state.clear
+            scan: reset
+       end
+
+       def scan(reason: Symbol)
+        current = Dir.glob(@patterns).map(&->info(String)).sort_by!(&.last).to_set
+       end
+    end
+end