From 723c9a963a96b25a7498f3e0417307e89c8bb684 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Wed, 31 May 2023 22:56:15 +0800
Subject: HALF WORK: for sync.

---
 tools/cru-py/cru/paths.py | 63 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 tools/cru-py/cru/paths.py

(limited to 'tools/cru-py/cru/paths.py')

diff --git a/tools/cru-py/cru/paths.py b/tools/cru-py/cru/paths.py
new file mode 100644
index 0000000..df5042b
--- /dev/null
+++ b/tools/cru-py/cru/paths.py
@@ -0,0 +1,63 @@
+from pathlib import Path
+import os
+
+from .excp import CruException
+
+
+class ApplicationPathError(CruException):
+    def __init__(self, message: str, p: str | Path, *args, **kwargs):
+        super().__init__(message, *args, path=str(p), **kwargs)
+
+
+def check_parents_dir(p: str | Path, /, must_exist: bool = False) -> bool:
+    p = Path(p) if isinstance(p, str) else p
+    for p in reversed(p.parents):
+        if not p.exists() and not must_exist:
+            return False
+        if not p.is_dir():
+            raise ApplicationPathError("Parents path should be a dir.", p)
+    return True
+
+
+class ApplicationPath:
+    def __init__(self, p: str | Path, is_dir: bool) -> None:
+        self._path = Path(p) if isinstance(p, str) else p
+        self._is_dir = is_dir
+
+    @property
+    def path(self) -> Path:
+        return self._path
+
+    @property
+    def is_dir(self) -> bool:
+        return self._is_dir
+
+    def check_parents(self, must_exist: bool = False) -> bool:
+        return check_parents_dir(self._path.parent, must_exist)
+
+    def check_self(self, must_exist: bool = False) -> bool:
+        if not self.check_parents(must_exist):
+            return False
+        if not self.path.exists():
+            if not must_exist: return False
+            raise ApplicationPathError("Mot exist.", self.path)
+        if self.is_dir:
+            if not self.path.is_dir():
+                raise ApplicationPathError("Should be a directory, but not.", self.path)
+            else:
+                return False
+        else:
+            if not self.path.is_file():
+                raise ApplicationPathError("Should be a file, but not.", self.path)
+            else:
+                return False
+
+    def ensure(self, create_file: bool = False) -> None:
+        e = self.check_self(False)
+        if not e:
+            os.makedirs(self.path.parent, exist_ok=True)
+            if self.is_dir:
+                os.mkdir(self.path)
+            elif create_file:
+                with open(self.path, "w") as f:
+                    f.write("")
-- 
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