From 7cda7765dc0279ad99c60e156f7731748b5d5522 Mon Sep 17 00:00:00 2001
From: John Lancaster <32917998+jsl12@users.noreply.github.com>
Date: Sat, 4 May 2024 09:44:17 -0500
Subject: [PATCH] directory monitor prototype

---
 direcory_monitor.py | 49 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 direcory_monitor.py

diff --git a/direcory_monitor.py b/direcory_monitor.py
new file mode 100644
index 0000000..c864a09
--- /dev/null
+++ b/direcory_monitor.py
@@ -0,0 +1,49 @@
+import logging
+from dataclasses import dataclass, field
+from datetime import datetime
+from pathlib import Path
+from typing import Dict, List
+
+logger = logging.getLogger(__name__)
+
+
+@dataclass
+class DirectoryMonitor:
+    dir: Path
+    glob: str = '*'
+    times: Dict[Path, datetime] = field(default_factory=dict, repr=False)
+    changed: List[Path] = field(init=False, repr=False)
+    new: List[Path] = field(init=False, repr=False)
+    deleted: List[Path] = field(init=False, repr=False)
+    last_checked: datetime = field(default_factory=datetime.now)
+
+    def __post_init__(self):
+        self.update()
+
+    def update(self):
+        self.last_checked = datetime.now()
+        self.new, self.changed, self.deleted = [], [], []
+
+        # iterate through the directory and update the stored times
+        for file in self.dir.rglob(self.glob):
+            if file.is_dir():
+                logger.debug(f'Skipping directory: {file}')
+                continue
+
+            modified_time = datetime.fromtimestamp(file.stat().st_mtime)
+            if file in self.times:
+                if modified_time > self.times[file]:
+                    logger.info(f'Updated file: {file}')
+                    self.changed.append(file)
+            else:
+                logger.debug(f'New file: {file}')
+                self.new.append(file)
+
+            self.times[file] = modified_time
+
+        # remove any entries for files that no longer exist
+        for file in list(self.times.keys()):
+            if not file.exists():
+                logger.warning(f'Detected deleted file: {file}')
+                del self.times[file]
+                self.deleted.append(file)