Move download summary into a separate class

PFERD/download_summary.py

@@ -0,0 +1,50 @@
+class DownloadSummary:
+
+    def __init__(self):
+        self._new_files = []
+        self._changed_files = []
+        self._deleted_files = []
+
+    def merge(self, summary: 'DownloadSummary') -> None:
+        self._new_files += summary._new_files
+        self._changed_files += summary._changed_files
+        self._deleted_files += summary._deleted_files
+
+    def add_deleted_file(self, path) -> None:
+        self._deleted_files.append(path)
+
+    def add_changed_file(self, path) -> None:
+        self._changed_files.append(path)
+
+    def add_new_file(self, path) -> None:
+        self._new_files.append(path)
+
+    def _has_no_updates(self) -> bool:
+        return len(self._new_files) == 0 and len(self._changed_files) == 0 and len(self._deleted_files) == 0
+
+    def print(self, logger, pretty) -> None:
+        logger.info("")
+        logger.info("Summary: ")
+        if self._has_no_updates():
+            logger.info("nothing changed")
+        else:
+            if len(self._new_files) > 0:
+                logger.info("New Files:")
+                for file in self._new_files:
+                    pretty.new_file(file)
+
+            logger.info("")
+
+            if len(self._changed_files) > 0:
+                logger.info("Modified Files:")
+                for file in self._changed_files:
+                    pretty.modified_file(file)
+
+            logger.info("")
+
+            if len(self._deleted_files) > 0:
+                logger.info("Deleted Files:")
+                for file in self._deleted_files:
+                    pretty.deleted_file(file)
+
+        logger.info("")

PFERD/organizer.py

@@ -9,6 +9,7 @@ import shutil
 from pathlib import Path, PurePath
 from typing import List, Set
 
+from .download_summary import DownloadSummary
 from .location import Location
 from .logging import PrettyLogger
 from .utils import prompt_yes_no
@@ -24,10 +25,6 @@ class FileAcceptException(Exception):
 class Organizer(Location):
     """A helper for managing downloaded files."""
 
-    new_files = []
-    modified_files = []
-    deleted_files = []
-
     def __init__(self, path: Path):
         """Create a new organizer for a given path."""
         super().__init__(path)
@@ -36,6 +33,8 @@ class Organizer(Location):
         # Keep the root dir
         self._known_files.add(path.resolve())
 
+        self.download_summary = DownloadSummary()
+
     def accept_file(self, src: Path, dst: PurePath) -> None:
         """Move a file to this organizer and mark it."""
         src_absolute = src.resolve()
@@ -73,10 +72,10 @@ class Organizer(Location):
                 dst_absolute.touch()
                 return
 
-            self.modified_files.append(dst_absolute)
+            self.download_summary.add_changed_file(dst_absolute)
             PRETTY.modified_file(dst_absolute)
         else:
-            self.new_files.append(dst_absolute)
+            self.download_summary.add_new_file(dst_absolute)
             PRETTY.new_file(dst_absolute)
 
         # Create parent dir if needed
@@ -127,5 +126,5 @@ class Organizer(Location):
         prompt = f"Do you want to delete {path}"
 
         if prompt_yes_no(prompt, False):
-            self.deleted_files.append(path)
+            self.download_summary.add_deleted_file(path)
             path.unlink()

PFERD/pferd.py

@@ -9,6 +9,7 @@ from typing import Callable, List, Optional, Union
 from .cookie_jar import CookieJar
 from .diva import (DivaDownloader, DivaDownloadStrategy, DivaPlaylistCrawler,
                    diva_download_new)
+from .download_summary import DownloadSummary
 from .errors import FatalException, swallow_and_print_errors
 from .ilias import (IliasAuthenticator, IliasCrawler, IliasDirectoryFilter,
                     IliasDownloader, IliasDownloadInfo, IliasDownloadStrategy,
@@ -34,10 +35,6 @@ class Pferd(Location):
     useful shortcuts for running synchronizers in a single interface.
     """
 
-    new_files = []
-    modified_files = []
-    deleted_files = []
-
     def __init__(
             self,
             base_dir: Path,
@@ -46,6 +43,7 @@ class Pferd(Location):
     ):
         super().__init__(Path(base_dir))
 
+        self._download_summary = DownloadSummary()
         self._tmp_dir = TmpDir(self.resolve(tmp_dir))
         self._test_run = test_run
 
@@ -156,38 +154,12 @@ class Pferd(Location):
             clean=clean,
         )
 
-        self.new_files += organizer.new_files
-        self.modified_files += organizer.modified_files
-        self.deleted_files += organizer.deleted_files
+        self._download_summary.merge(organizer.download_summary)
 
         return organizer
 
     def print_summary(self):
-        LOGGER.info("")
-        LOGGER.info("Summary: ")
-        if len(self.new_files) == 0 and len(self.modified_files) == 0 and len(self.deleted_files) == 0:
-            LOGGER.info("Nothing changed")
-
-        if len(self.new_files) > 0:
-            LOGGER.info("New Files:")
-            for file in self.new_files:
-                PRETTY.new_file(file)
-
-        LOGGER.info("")
-
-        if len(self.modified_files) > 0:
-            LOGGER.info("Modified Files:")
-            for file in self.modified_files:
-                PRETTY.modified_file(file)
-
-        LOGGER.info("")
-
-        if len(self.deleted_files) > 0:
-            LOGGER.info("Deleted Files:")
-            for file in self.deleted_files:
-                PRETTY.deleted_file(file)
-
-        LOGGER.info("")
+        self._download_summary.print(LOGGER, PRETTY)
 
     @swallow_and_print_errors
     def ilias_kit_personal_desktop(