1 files changed, 65 insertions, 0 deletions
diff --git a/tools/cru-py/cru/app.py b/tools/cru-py/cru/app.py
new file mode 100644
index 0000000..6a60926
--- /dev/null
+++ b/tools/cru-py/cru/app.py
@@ -0,0 +1,65 @@
+import os
+from pathlib import Path
+
+from ._error import CruException
+from ._path import CruPath
+
+
+class CruApplication:
+    def __init__(self, name: str) -> None:
+        self._name = name
+
+
+class ApplicationPathError(CruException):
+    def __init__(self, message, _path: Path, *args, **kwargs):
+        super().__init__(message, *args, **kwargs)
+        self._path = _path
+
+    @property
+    def path(self) -> Path:
+        return self._path
+
+
+class ApplicationPath:
+    def __init__(self, p: str | Path, is_dir: bool) -> None:
+        self._path = CruPath(p)
+        self._is_dir = is_dir
+
+    @property
+    def path(self) -> CruPath:
+        return self._path
+
+    @property
+    def is_dir(self) -> bool:
+        return self._is_dir
+
+    def check_parents(self, must_exist: bool = False) -> bool:
+        return self._path.check_parents_dir(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("Not 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("")