From 7b9498bccc9e97186bc6a78d9c8ed426bfe84aad Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Constantin=20F=C3=BCrst?= <c@fuersten.info>
Date: Sat, 2 Jul 2022 12:12:37 +0200
Subject: [PATCH] add basic construct for libconv.py

---
 libconv.py | 124 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 libconv.py

diff --git a/libconv.py b/libconv.py
new file mode 100644
index 0000000..e3da86f
--- /dev/null
+++ b/libconv.py
@@ -0,0 +1,124 @@
+CONFIG_FILE: str = "libconv.ini"
+CUE_SHEET_EXTENSION: str = ".cue"
+
+import os
+import shutil
+import logging
+import subprocess
+from configparser import ConfigParser
+from copy import deepcopy
+from pathlib import Path
+from typing import List, Optional, Tuple
+ 
+LOGGER = logging.getLogger(__name__)
+
+config = ConfigParser()
+config.read(CONFIG_FILE)
+source_folder: str = config.get("libconv", "source_folder")
+destination_folder: str = config.get("libconv", "destination_folder")
+source_file_extensions: List[str] = config.get("libconv", "source_file_extensions").split(",")
+destination_extension: str = config.get("libconv", "destination_extension")
+ffmpeg_options: str = config.get("libconv", "ffmpeg_options")
+ffmpeg_location: str = config.get("libconv", "ffmpeg_location")
+folder_icon_extensions: List[str] = config.get("libconv", "folder_icon_extensions").split(",")
+overwrite: bool = config.get("libconv", "overwrite_files") == "true"
+dry_run: bool = config.get("libconv", "dry_run") != "false"
+
+# ----------------------------------------------------------------- #
+# file and folder operations
+
+def copy(src: str, dst: str):
+    if (dry_run):
+        LOGGER.debug(f"copy {src} to {dst}")
+    else:
+        shutil.copyfile(src, dst, follow_symlinks=True)
+
+def mkdir(path: str):
+    if (dry_run):
+        LOGGER.debug(f"mkdir -r {path}")
+    else:
+        os.makedirs(path, exist_ok=True)
+
+def execute(command: str):
+    if (dry_run):
+        LOGGER.debug(f"execute: {command}")
+    else:
+        subprocess.run(command)
+
+# ----------------------------------------------------------------- #
+# cue sheet processing
+
+def cue_sheet_processor(path: str):
+    dst_folder = prepare_destination(path)
+    sheet = get_files_with_ext(path, [CUE_SHEET_EXTENSION])
+
+    if (len(sheet) != 1):
+        LOGGER.debug(f"ERR: Expected exactly one but {path} contains {len(sheet)} cue sheets")
+        exit(-1)
+
+# ----------------------------------------------------------------- #
+# basic "folder contains audio files" processing
+
+def file_processor(path: str):
+    dst_folder = prepare_destination(path)
+    files = get_files_with_ext(path, source_file_extensions)
+
+    for file in files:
+        filename = get_filename(file, path)
+        execute(f"{ffmpeg_location} -i {file} {ffmpeg_options} {dst_folder + filename}.{destination_extension}")
+
+# ----------------------------------------------------------------- #
+# Iteration over library folders and preparation
+
+def contains_extension(path: str, extensions: List[str]) -> bool:
+    for root, dirs, files in os.walk(path):
+        for file in files:
+            for ext in extensions:
+                if file.endswith(ext):
+                    return True
+    return False
+
+def get_files_with_ext(path: str, extensions: List[str]) -> List[str]:
+    files = []
+    for root, dirs, files in os.walk(path):
+        for file in files:
+            for ext in extensions:
+                if file.endswith(ext):
+                    files.append(os.path.join(root, file))
+    return files
+
+def prepare_destination(path: str) -> str:
+    images = get_files_with_ext(path, folder_icon_extensions)
+
+    sub_path = path.replace(source_folder, "")
+    new_path = destination_folder + sub_path
+    mkdir(new_path)
+
+    for img in images:
+        img_name = img.replace(path, "")
+        new_img_path = new_path + img_name
+        copy(img, new_img_path)
+
+    return new_path
+        
+def get_filename(file: str, path: str) -> str:
+    fname = file.replace(path, "")
+    for ext in source_file_extensions:
+        fname = fname.replace("." + ext, "")
+    return fname
+
+def scan_folder(path: str):
+    for root, dirs, files in os.walk(path):
+        for directory in dirs:
+            process_folder(os.path.join(root, directory))
+
+def process_folder(path: str):
+    if contains_extension(path, [CUE_SHEET_EXTENSION]):
+        cue_sheet_processor(path)
+    elif contains_extension(path, source_file_extensions):
+        file_processor(path)
+    else:
+        scan_folder(path)
+
+if __name__ == "__main__":
+    process_folder(source_folder)
\ No newline at end of file