From 36b902e22791e9fab32d5df4b760941375b55c24 Mon Sep 17 00:00:00 2001
From: ChaotiCryptidz <chaoticryptidz@owo.monster>
Date: Fri, 4 Feb 2022 13:32:22 +0000
Subject: [PATCH] initial commit

---
 .envrc                            |   1 +
 .gitignore                        |   1 +
 README.md                         |  91 +-----------------
 main.py                           |  27 ++++++
 musicutil/copy_command.py         | 147 ++++++++++++++++++++++++++++++
 musicutil/load_tag_information.py |  20 ++++
 musicutil/meta.py                 |   7 ++
 musicutil/process_command.py      |  62 +++++++++++++
 musicutil/scan_for_music.py       |  17 ++++
 musicutil/substitutions.py        |  11 +++
 musicutil/types.py                |  43 +++++++++
 nix-extra-deps/fold-to-ascii.nix  |  12 +++
 shell.nix                         |   7 ++
 13 files changed, 356 insertions(+), 90 deletions(-)
 create mode 100644 .envrc
 create mode 100644 .gitignore
 create mode 100755 main.py
 create mode 100644 musicutil/copy_command.py
 create mode 100644 musicutil/load_tag_information.py
 create mode 100644 musicutil/meta.py
 create mode 100644 musicutil/process_command.py
 create mode 100644 musicutil/scan_for_music.py
 create mode 100644 musicutil/substitutions.py
 create mode 100644 musicutil/types.py
 create mode 100644 nix-extra-deps/fold-to-ascii.nix
 create mode 100644 shell.nix

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..977c7a4
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use nix         
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ed8ebf5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+__pycache__
\ No newline at end of file
diff --git a/README.md b/README.md
index 5b2d7ae..d48df89 100644
--- a/README.md
+++ b/README.md
@@ -1,92 +1,3 @@
 # musicutil
 
-
-
-## Getting started
-
-To make it easy for you to get started with GitLab, here's a list of recommended next steps.
-
-Already a pro? Just edit this README.md and make it your own. Want to make it easy? [Use the template at the bottom](#editing-this-readme)!
-
-## Add your files
-
-- [ ] [Create](https://docs.gitlab.com/ee/user/project/repository/web_editor.html#create-a-file) or [upload](https://docs.gitlab.com/ee/user/project/repository/web_editor.html#upload-a-file) files
-- [ ] [Add files using the command line](https://docs.gitlab.com/ee/gitlab-basics/add-file.html#add-a-file-using-the-command-line) or push an existing Git repository with the following command:
-
-```
-cd existing_repo
-git remote add origin https://gitlab.com/ChaotiCryptidz/musicutil.git
-git branch -M main
-git push -uf origin main
-```
-
-## Integrate with your tools
-
-- [ ] [Set up project integrations](https://gitlab.com/ChaotiCryptidz/musicutil/-/settings/integrations)
-
-## Collaborate with your team
-
-- [ ] [Invite team members and collaborators](https://docs.gitlab.com/ee/user/project/members/)
-- [ ] [Create a new merge request](https://docs.gitlab.com/ee/user/project/merge_requests/creating_merge_requests.html)
-- [ ] [Automatically close issues from merge requests](https://docs.gitlab.com/ee/user/project/issues/managing_issues.html#closing-issues-automatically)
-- [ ] [Enable merge request approvals](https://docs.gitlab.com/ee/user/project/merge_requests/approvals/)
-- [ ] [Automatically merge when pipeline succeeds](https://docs.gitlab.com/ee/user/project/merge_requests/merge_when_pipeline_succeeds.html)
-
-## Test and Deploy
-
-Use the built-in continuous integration in GitLab.
-
-- [ ] [Get started with GitLab CI/CD](https://docs.gitlab.com/ee/ci/quick_start/index.html)
-- [ ] [Analyze your code for known vulnerabilities with Static Application Security Testing(SAST)](https://docs.gitlab.com/ee/user/application_security/sast/)
-- [ ] [Deploy to Kubernetes, Amazon EC2, or Amazon ECS using Auto Deploy](https://docs.gitlab.com/ee/topics/autodevops/requirements.html)
-- [ ] [Use pull-based deployments for improved Kubernetes management](https://docs.gitlab.com/ee/user/clusters/agent/)
-- [ ] [Set up protected environments](https://docs.gitlab.com/ee/ci/environments/protected_environments.html)
-
-***
-
-# Editing this README
-
-When you're ready to make this README your own, just edit this file and use the handy template below (or feel free to structure it however you want - this is just a starting point!).  Thank you to [makeareadme.com](https://www.makeareadme.com/) for this template.
-
-## Suggestions for a good README
-Every project is different, so consider which of these sections apply to yours. The sections used in the template are suggestions for most open source projects. Also keep in mind that while a README can be too long and detailed, too long is better than too short. If you think your README is too long, consider utilizing another form of documentation rather than cutting out information.
-
-## Name
-Choose a self-explaining name for your project.
-
-## Description
-Let people know what your project can do specifically. Provide context and add a link to any reference visitors might be unfamiliar with. A list of Features or a Background subsection can also be added here. If there are alternatives to your project, this is a good place to list differentiating factors.
-
-## Badges
-On some READMEs, you may see small images that convey metadata, such as whether or not all the tests are passing for the project. You can use Shields to add some to your README. Many services also have instructions for adding a badge.
-
-## Visuals
-Depending on what you are making, it can be a good idea to include screenshots or even a video (you'll frequently see GIFs rather than actual videos). Tools like ttygif can help, but check out Asciinema for a more sophisticated method.
-
-## Installation
-Within a particular ecosystem, there may be a common way of installing things, such as using Yarn, NuGet, or Homebrew. However, consider the possibility that whoever is reading your README is a novice and would like more guidance. Listing specific steps helps remove ambiguity and gets people to using your project as quickly as possible. If it only runs in a specific context like a particular programming language version or operating system or has dependencies that have to be installed manually, also add a Requirements subsection.
-
-## Usage
-Use examples liberally, and show the expected output if you can. It's helpful to have inline the smallest example of usage that you can demonstrate, while providing links to more sophisticated examples if they are too long to reasonably include in the README.
-
-## Support
-Tell people where they can go to for help. It can be any combination of an issue tracker, a chat room, an email address, etc.
-
-## Roadmap
-If you have ideas for releases in the future, it is a good idea to list them in the README.
-
-## Contributing
-State if you are open to contributions and what your requirements are for accepting them.
-
-For people who want to make changes to your project, it's helpful to have some documentation on how to get started. Perhaps there is a script that they should run or some environment variables that they need to set. Make these steps explicit. These instructions could also be useful to your future self.
-
-You can also document commands to lint the code or run tests. These steps help to ensure high code quality and reduce the likelihood that the changes inadvertently break something. Having instructions for running tests is especially helpful if it requires external setup, such as starting a Selenium server for testing in a browser.
-
-## Authors and acknowledgment
-Show your appreciation to those who have contributed to the project.
-
-## License
-For open source projects, say how it is licensed.
-
-## Project status
-If you have run out of energy or time for your project, put a note at the top of the README saying that development has slowed down or stopped completely. Someone may choose to fork your project or volunteer to step in as a maintainer or owner, allowing your project to keep going. You can also make an explicit request for maintainers.
+My tool for managing a local music library.
\ No newline at end of file
diff --git a/main.py b/main.py
new file mode 100755
index 0000000..e6f442a
--- /dev/null
+++ b/main.py
@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+
+import argparse
+
+from musicutil.process_command import ProcessCommand
+from musicutil.copy_command import CopyCommand
+
+parser = argparse.ArgumentParser(description='Highly Opinionated Music ')
+subparsers = parser.add_subparsers(dest="subparser_name")
+
+process_parser = subparsers.add_parser('process')
+process_parser.add_argument('src', type=str, help='src base music directory')
+process_parser.add_argument('--dry-run', action='store_true')
+
+copy_parser = subparsers.add_parser('copy')
+copy_parser.add_argument('src', type=str, help='src base music directory')
+copy_parser.add_argument('dest', type=str, help='dest music directory')
+copy_parser.add_argument('--transcode-level', type=str, help='transcode level', default="copy")
+copy_parser.add_argument('--skip-existing', action='store_true')
+copy_parser.add_argument('--single-directory', action='store_true')
+
+args = parser.parse_args()
+
+if args.subparser_name == "process":
+  ProcessCommand(args.src, args.dry_run).run()
+elif args.subparser_name == "copy":
+  CopyCommand(args.src, args.dest, args.transcode_level, args.single_directory, args.skip_existing).run()
\ No newline at end of file
diff --git a/musicutil/copy_command.py b/musicutil/copy_command.py
new file mode 100644
index 0000000..b599f3a
--- /dev/null
+++ b/musicutil/copy_command.py
@@ -0,0 +1,147 @@
+from .types import File
+from .scan_for_music import scan_for_music
+from .load_tag_information import load_tag_information
+
+from os import makedirs as make_directories
+from os.path import exists as path_exists
+from shutil import copy as copy_file
+from copy import deepcopy as deep_copy
+from subprocess import run as run_command
+
+class CopyCommandState:
+  files: list[File] = []
+  transcoded_files: list[File] = []
+
+class CopyCommand(): 
+  def __init__(self, 
+    src: str, 
+    dest: str,
+    transcode_level: str,
+    single_directory: bool,
+    skip_existing: bool
+  ):
+    self.src = src
+    self.dest = dest
+    self.transcode_level = transcode_level
+    self.single_directory = single_directory
+    self.skip_existing = skip_existing
+    self.state = CopyCommandState()
+
+  def run(self):
+    print("Copying")
+    self.scan_for_music()
+    self.load_tag_information()
+    if self.single_directory:
+      self.check_for_collisions()
+    self.transcode_files()
+
+  def scan_for_music(self):
+    print("Scanning For Music")
+    self.state.files = scan_for_music(self.src)
+
+  def load_tag_information(self):
+    print("Loading Tag Information")
+
+    for file in self.state.files:
+      file.tags = load_tag_information(file)
+      
+  def check_for_collisions(self):
+    print("Checking For Colisions")
+    seen = set()
+    dupes = []
+
+    for file in self.state.files:
+      filename = file.filename
+      if filename in seen:
+          dupes.append(filename)
+      else:
+          seen.add(filename)
+
+    if len(dupes) > 0:
+      print("Dupes Found:", dupes)
+      print("Cannot continue using --single-directory")
+      print("Please rename or remove duplicates")
+      exit()
+
+  def _transcode_copy(self, file: File): 
+    src = file.join_path_to()
+    dest = file.join_filename() if self.single_directory else file.join_path_from_src()
+    dest = self.dest + "/" + dest
+
+    exists = path_exists(dest)
+
+    if (self.skip_existing and not exists) or not self.skip_existing:
+      print("Copying", src, "to", dest)
+      copy_file(
+       src,
+       dest,
+      )
+    else:
+      print("Skipping", src, "as already is copied at", dest)
+    
+    self.state.transcoded_files.append(file)
+
+  def _transcode_with_level(self, file: File, level: str):
+    transcoded_file_extension = "opus"
+
+    src = file.join_path_to()
+
+    new_file = deep_copy(file)
+    new_file.extension = transcoded_file_extension
+  
+    dest_filepath = new_file.join_filename() if self.single_directory else new_file.join_path_from_src()
+    dest_filepath = self.dest + "/" + dest_filepath
+
+    if (self.skip_existing and path_exists(dest_filepath)):
+      print("Skipping transcoding", dest_filepath)
+      self.state.transcoded_files.append(new_file)
+      return
+    
+    bitrate = ""
+
+    if self.transcode_level == "high":
+      bitrate = "128K"
+    elif self.transcode_level == "medium":
+      bitrate = "96K"
+    elif self.transcode_level == "low":
+      bitrate = "64K"
+
+    print("Transcoding", src, "to", dest_filepath)
+
+    title = file.tags.title
+    artist = file.tags.artist
+
+    # TODO: check for errors
+    run_command([
+      "ffmpeg",
+      "-y",
+      "-hide_banner",
+      "-loglevel", "warning",
+      "-i", src,
+      "-c:a", "libopus",
+      "-b:a", bitrate,
+      "-metadata", f"title=\"{title}\"",
+      "-metadata", f"artist=\"{artist}\"",
+      dest_filepath
+    ])
+
+    self.state.transcoded_files.append(new_file) 
+      
+  def transcode_files(self):
+    print("Transcoding Files")
+    
+    if not self.single_directory:
+      directories = set()
+      for file in self.state.files:
+        directories.add(file.path_from_src)
+      for dir in directories:
+        make_directories(self.dest + "/" + dir, exist_ok=True)
+
+    if self.transcode_level == "copy":
+      for file in self.state.files:
+        self._transcode_copy(file)
+      return
+    elif self.transcode_level in ["high", "medium", "low"]:
+      for file in self.state.files:
+        self._transcode_with_level(file, self.transcode_level)
+
diff --git a/musicutil/load_tag_information.py b/musicutil/load_tag_information.py
new file mode 100644
index 0000000..18ba648
--- /dev/null
+++ b/musicutil/load_tag_information.py
@@ -0,0 +1,20 @@
+from .types import File, Tags
+
+from mutagen.mp3 import EasyMP3 as MP3
+from mutagen.flac import FLAC
+
+def load_tag_information(file: File) -> Tags:
+  path = file.join_path_to()
+  tags = Tags()
+  if file.extension == "mp3":
+    mp3 = MP3(path)
+    tags.title = mp3["title"][0]
+    tags.artist = mp3["artist"][0]
+  elif file.extension == "flac":
+    flac = FLAC(path)
+    tags.title = flac["title"][0]
+    tags.artist = flac["artist"][0]
+  else:
+    print("Invalid / Unsupported Container")
+    exit()
+  return tags
\ No newline at end of file
diff --git a/musicutil/meta.py b/musicutil/meta.py
new file mode 100644
index 0000000..bbe9dd7
--- /dev/null
+++ b/musicutil/meta.py
@@ -0,0 +1,7 @@
+supported_formats = ["mp3", "flac"]
+
+sub_char = "_"
+
+substitutions = {
+  "α": "a",
+}
\ No newline at end of file
diff --git a/musicutil/process_command.py b/musicutil/process_command.py
new file mode 100644
index 0000000..2f68d87
--- /dev/null
+++ b/musicutil/process_command.py
@@ -0,0 +1,62 @@
+from .types import File, Tags
+from .scan_for_music import scan_for_music
+from .load_tag_information import load_tag_information
+from .substitutions import reduce_to_ascii_and_substitute
+
+from copy import deepcopy as deep_copy
+from os import rename as rename_file
+
+class ProcessCommandState:
+  files: list[File] = []
+
+class ProcessCommand(): 
+  def __init__(self, src: str, dry_run: bool):
+    self.src = src
+    self.dry_run = dry_run
+    self.state = ProcessCommandState()
+
+  def run(self):
+    print("Renaming")
+    self.scan_for_music()
+    self.load_tag_information()
+    self.rename_files()
+
+  def scan_for_music(self):
+    print("Scanning For Music")
+    self.state.files = scan_for_music(self.src)
+
+  def load_tag_information(self):
+    print("Loading Tag Information")
+
+    for file in self.state.files:
+      tags = load_tag_information(file)
+      file.tags = tags
+      
+
+  def _rename_file(self, file: File) -> File:
+    filename = file.filename
+    artist = file.tags.artist.replace("\n", "")
+    title = file.tags.title.replace("\n", "")
+
+    proper_filename = reduce_to_ascii_and_substitute(f"{artist} - {title}")
+
+    if filename != proper_filename:
+      print(f"Renaming \"{filename}\"", "to" + f"\"{proper_filename}\"" + "\n")
+
+    new_file = deep_copy(file)
+    new_file.filename = proper_filename
+
+    if not self.dry_run:
+      rename_file(file.join_path_to(), new_file.join_path_to())
+      # so that other steps after read the new file and not 
+      # the orig pre-rename file when not dry run
+      return new_file
+    else: 
+      return file
+
+  def rename_files(self):
+    print("Renaming files")
+
+    for file in self.state.files:
+      index = self.state.files.index(file)
+      self.state.files[index] = self._rename_file(file)
diff --git a/musicutil/scan_for_music.py b/musicutil/scan_for_music.py
new file mode 100644
index 0000000..3bb799c
--- /dev/null
+++ b/musicutil/scan_for_music.py
@@ -0,0 +1,17 @@
+from pathlib import Path
+from os.path import relpath
+
+from .types import File
+from .meta import supported_formats
+
+def scan_for_music(src: str) -> list[File]:
+  files: list[File] = []
+  for format in supported_formats:
+    for path in Path(src).rglob("*." + format):
+      file = File()
+      file.path_to = str(path.parent)
+      file.path_from_src = relpath(str(path.parent), src)
+      file.filename = path.stem
+      file.extension = path.suffix.replace(".", "")
+      files.append(file)
+  return files
\ No newline at end of file
diff --git a/musicutil/substitutions.py b/musicutil/substitutions.py
new file mode 100644
index 0000000..7c8b1ff
--- /dev/null
+++ b/musicutil/substitutions.py
@@ -0,0 +1,11 @@
+from .meta import sub_char, substitutions
+from fold_to_ascii import fold
+
+def reduce_to_ascii_and_substitute(filename: str): 
+  filename = filename.replace("/", sub_char)
+  filename = filename.replace("\\", sub_char)
+  filename = filename.replace("\n", "")
+  for sub_before in substitutions.keys():
+    filename = filename.replace(sub_before, substitutions[sub_before])
+  filename = fold(filename)
+  return filename
diff --git a/musicutil/types.py b/musicutil/types.py
new file mode 100644
index 0000000..cf372b4
--- /dev/null
+++ b/musicutil/types.py
@@ -0,0 +1,43 @@
+class Tags:
+  title = ""
+  artist = ""
+
+  def to_dict(self):
+    return {
+      "title": self.title,
+      "artist": self.artist
+    }
+
+  def __repr__(self):
+    return repr(self.to_dict())
+
+class File:
+  filename = ""
+  extension = ""
+  # The path to the actual file
+  path_to = ""
+  # The path relative to the source directory
+  path_from_src = ""
+
+  tags = Tags()
+
+  def join_filename(self): 
+    return f"{self.filename}.{self.extension}"
+
+  def join_path_to(self): 
+    return f"{self.path_to}/{self.filename}.{self.extension}"
+
+  def join_path_from_src(self): 
+    return f"{self.path_from_src}/{self.filename}.{self.extension}"
+
+  def to_dict(self):
+    return {
+      "filename": self.filename,
+      "extension": self.extension,
+      "path_to": self.path_to,
+      "path_from_src": self.path_from_src,
+      "tags": self.tags.to_dict(),
+    }
+
+  def __repr__(self):
+    return repr(self.to_dict())
\ No newline at end of file
diff --git a/nix-extra-deps/fold-to-ascii.nix b/nix-extra-deps/fold-to-ascii.nix
new file mode 100644
index 0000000..4e9bd08
--- /dev/null
+++ b/nix-extra-deps/fold-to-ascii.nix
@@ -0,0 +1,12 @@
+{ lib, buildPythonPackage, fetchPypi }:
+
+buildPythonPackage rec {
+  pname = "fold-to-ascii";
+  version = "1.0.2.post1";
+
+  src = fetchPypi {
+    pname = "fold_to_ascii";
+    inherit version;
+    sha256 = "sha256-cWegf9wjC9XfU4HpIh/iRtDv86hutn45NfkfWuyjUzo=";
+  };
+}
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..cad554d
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,7 @@
+{ pkgs ? import <nixpkgs> { } }:
+let
+  fold-to-ascii = (py: py.callPackage ./nix-extra-deps/fold-to-ascii.nix { });
+  my_python = pkgs.python39.withPackages
+    (py: with py; [ py.mutagen (fold-to-ascii py) ]);
+
+in pkgs.mkShell { packages = with pkgs; [ my_python ffmpeg ]; }