Elaborate accept_file in new_organizer

PFERD/new_organizer.py

@@ -3,14 +3,24 @@
 A organizer is bound to a single directory.
 """
 
+import filecmp
 import logging
 import shutil
 from pathlib import Path
 from typing import List, Set
 
-from .utils import prompt_yes_no
+from .utils import PrettyLogger, prompt_yes_no, resolve_path
 
 logger = logging.getLogger(__name__)
+pretty_logger = PrettyLogger(logger)
+
+
+class FileAcceptException(Exception):
+    """An exception while accepting a file."""
+
+    def __init__(self, message: str):
+        """Create a new exception."""
+        super().__init__(message)
 
 
 class Organizer():
@@ -20,35 +30,70 @@ class Organizer():
         """Create a new organizer for a given path."""
         self._path = path
         self._known_files: Set[Path] = set()
+        # Keep the root dir
+        self.mark(path)
 
     @property
     def path(self) -> Path:
         """Return the path for this organizer."""
         return self._path
 
-    # TODO: Name this method :/ move_from? add_file? new_file?
-    def accept_file(self, source: Path, target: Path) -> None:
+    def resolve(self, target_file: Path) -> Path:
+        """Resolve a file relative to the path of this organizer.
+
+        Raises an exception if the file is outside the given directory.
+        """
+        return resolve_path(self.path, target_file)
+
+    def accept_file(self, src: Path, dst: Path) -> None:
         """Move a file to this organizer and mark it."""
-        source_absolute = self.path.joinpath(source).absolute()
-        target_absolute = self.path.joinpath(target).absolute()
+        src_absolute = src.resolve()
+        dst_absolute = self.resolve(dst)
 
-        logger.debug(f"Copying '{source_absolute}' to '{target_absolute}")
+        if not src_absolute.exists():
+            raise FileAcceptException("Source file does not exist")
 
-        shutil.move(str(source_absolute), str(target_absolute))
+        if not src_absolute.is_file():
+            raise FileAcceptException("Source is a directory")
 
-        self.mark_file(target)
+        logger.debug(f"Copying '{src_absolute}' to '{dst_absolute}")
 
-    # TODO: Name this method :/ track_file?
-    def mark_file(self, path: Path) -> None:
+        # Destination file is directory
+        if dst_absolute.exists() and dst_absolute.is_dir():
+            if prompt_yes_no(f"Overwrite folder {dst_absolute} with file?", default=False):
+                shutil.rmtree(dst_absolute)
+            else:
+                logger.warn(f"Could not add file {dst_absolute}")
+                return
+
+        # Destination file exists
+        if dst_absolute.exists() and dst_absolute.is_file():
+            if filecmp.cmp(str(src_absolute), str(dst_absolute), shallow=False):
+                pretty_logger.ignored_file(dst_absolute)
+
+                # Bail out, nothing more to do
+                self.mark(dst)
+                return
+            else:
+                pretty_logger.modified_file(dst_absolute)
+        else:
+            pretty_logger.new_file(dst_absolute)
+
+        # Create parent dir if needed
+        dst_parent_dir: Path = dst_absolute.parent
+        dst_parent_dir.mkdir(exist_ok=True, parents=True)
+
+        # Move file
+        shutil.move(str(src_absolute), str(dst_absolute))
+
+        self.mark(dst)
+
+    def mark(self, path: Path) -> None:
         """Mark a file as used so it will not get cleaned up."""
-        absolute_path = self.path.joinpath(path).absolute()
+        absolute_path = self.path.joinpath(path).resolve()
         self._known_files.add(absolute_path)
         logger.debug(f"Tracked {absolute_path}")
 
-    def resolve_file(self, file_path: Path) -> Path:
-        """Resolve a file relative to the path of this organizer."""
-        return self.path.joinpath(file_path)
-
     def cleanup(self) -> None:
         """Remove all untracked files in the organizer's dir."""
         logger.debug("Deleting all untracked files...")
@@ -63,12 +108,12 @@ class Organizer():
             if path.is_dir():
                 self._cleanup(path)
             else:
-                if path.absolute() not in self._known_files:
+                if path.resolve() not in self._known_files:
                     self._delete_file_if_confirmed(path)
 
         # Delete dir if it was empty and untracked
         dir_empty = len(list(start_dir.iterdir())) == 0
-        if start_dir.absolute() not in self._known_files and dir_empty:
+        if start_dir.resolve() not in self._known_files and dir_empty:
             start_dir.rmdir()
 
     def _delete_file_if_confirmed(self, path: Path) -> None:

PFERD/utils.py

@@ -52,6 +52,29 @@ def prompt_yes_no(question: str, default: Optional[bool] = None) -> bool:
             print(WRONG_REPLY)
 
 
+class ResolveException(Exception):
+    """An exception while resolving a file."""
+
+    def __init__(self, message: str):
+        """Create a new exception."""
+        super().__init__(message)
+
+
+def resolve_path(directory: Path, target_file: Path) -> Path:
+    """Resolve a file relative to the path of this organizer.
+
+    Raises a [ResolveException] if the file is outside the given directory.
+    """
+    absolute_path = directory.joinpath(target_file).resolve()
+
+    if not str(absolute_path).startswith(str(directory.resolve())):
+        raise ResolveException(
+            f"Path resolved to file outside folder ({absolute_path})"
+        )
+
+    return absolute_path
+
+
 class PrettyLogger:
 
     def __init__(self, logger: logging.Logger) -> None: