music-kraken-core/README.md

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# Music Kraken
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<img src="assets/logo.svg" width=300 alt="music kraken logo"/>
- [Music Kraken](#music-kraken)
- [Installation](#installation)
- [Notes for WSL](#notes-for-wsl)
- [Quick-Guide](#quick-guide)
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- [Query](#query)
- [CONTRIBUTE](#contribute)
- [Matrix Space](#matrix-space)
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- [TODO till the next release](#todo-till-the-next-release)
- [Programming Interface / Use as Library](#programming-interface--use-as-library)
- [Quick Overview](#quick-overview)
- [Data Model](#data-model)
- [Data Objects](#data-objects)
- [Creation](#creation)
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---
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## Installation
You can find and get this project from either [PyPI](https://pypi.org/project/music-kraken/) as a Python-Package,
or simply the source code from [GitHub](https://github.com/HeIIow2/music-downloader). Note that even though
everything **SHOULD** work cross-platform, I have only tested it on Ubuntu.
If you enjoy this project, feel free to give it a star on GitHub.
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```sh
# Install it with
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pip install music-kraken
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# and simply run it like this:
music-kraken
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```
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### Notes for WSL
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If you choose to run it in WSL, make sure ` ~/.local/bin` is added to your `$PATH` [#2][i2]
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## Quick-Guide
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The **Genre** you define at the start, is the folder my program will download the files into, as well as the value of the ID3 genre field.
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When it drops you into the **shell** 2 main things are important:
1. You search with `s: <query/url>`
2. You choose an option with just the index number of the option
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3. You download with `d: <options/url>`, where the options are comma separated
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### Query
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The syntax for the query is really simple.
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```mk
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> s: #a <any artist>
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searches for the artist <any artist>
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> s: #a <any artist> #r <any release>
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searches for the release (album) <any release> by the artist <any artist>
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> s: #r <any release> Me #t <any track>
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searches for the track <any track> from the release <any relaese>
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```
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The escape character is as usual `\`.
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---
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## CONTRIBUTE
I am happy about every pull request. To contribute look [here](contribute.md).
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## Matrix Space
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<img align="right" alt="music-kraken logo" src="assets/element_logo.png" width=100>
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I decided against creating a discord server, due to various communities get often banned from discord. A good and free Alternative are Matrix Spaces. I recommend the use of the Client [Element](https://element.io/download). It is completely open source.
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**Click [this invitation](https://matrix.to/#/#music-kraken:matrix.org) _([https://matrix.to/#/#music-kraken:matrix.org](https://matrix.to/#/#music-kraken:matrix.org))_ to join.**
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## TODO till the next release
> These Points will most likely be in the changelogs.
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- [x] Migrate away from pandoc, to a more lightweight alternative, that can be installed over PiPY.
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- [ ] Update the Documentation of the internal structure. _(could be pushed back one release)_
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---
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# Programming Interface / Use as Library
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This application is $100\%$ centered around Data. Thus, the most important thing for working with musik kraken is, to understand how I structured the data.
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## Quick Overview
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- explanation of the [Data Model](#data-model)
- how to use the [Data Objects](#data-objects)
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- further Dokumentation of _hopefully_ [most relevant classes](documentation/objects.md)
- the [old implementation](documentation/old_implementation.md)
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```mermaid
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---
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title: Quick Overview (outdated)
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---
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sequenceDiagram
participant pg as Page (eg. YouTube, MB, Musify, ...)
participant obj as DataObjects (eg. Song, Artist, ...)
participant db as DataBase
obj ->> db: write
db ->> obj: read
pg -> obj: find a source for any page, for object.
obj -> pg: add more detailed data from according page.
obj -> pg: if available download audio to target.
```
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## Data Model
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The Data Structure, that the whole programm is built on looks as follows:
```mermaid
---
title: Music Data
---
erDiagram
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Target {
}
Lyrics {
}
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Song {
}
Album {
}
Artist {
}
Label {
}
Source {
}
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Source }o--|| Song : ""
Source }o--|| Lyrics : ""
Source }o--|| Album : ""
Source }o--|| Artist : ""
Source }o--|| Label : ""
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Song }o--o{ Album : AlbumSong
Album }o--o{ Artist : ArtistAlbum
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Song }o--o{ Artist : "ArtistSong (features)"
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Label }o--o{ Album : LabelAlbum
Label }o--o{ Artist : LabelSong
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Song ||--o{ Lyrics : ""
Song ||--o{ Target : ""
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```
Ok now this **WILL** look intimidating, thus I break it down quickly.
*That is also the reason I didn't add all Attributes here.*
The most important Entities are:
- Song
- Album
- Artist
- Label
All of them *(and Lyrics)* can have multiple Sources, and every Source can only Point to one of those Element.
The `Target` Entity represents the location on the hard drive a Song has. One Song can have multiple download Locations.
The `Lyrics` Entity simply represents the Lyrics of each Song. One Song can have multiple Lyrics, e.g. Translations.
Here is the simplified Diagramm without only the main Entities.
```mermaid
---
title: simplified Music Data
---
erDiagram
Song {
}
Album {
}
Artist {
}
Label {
}
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Song }o--o{ Album : AlbumSong
Album }o--o{ Artist : ArtistAlbum
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Song }o--o{ Artist : "ArtistSong (features)"
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Label }o--o{ Album : LabelAlbum
Label }o--o{ Artist : LabelSong
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```
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Looks way more manageable, doesn't it?
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The reason every relation here is a `n:m` *(many to many)* relation is not, that it makes sense in the aspekt of modeling reality, but to be able to put data from many Sources in the same Data Model.
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Every Service models Data a bit different, and projecting a one-to-many relationship to a many to many relationship without data loss is easy. The other way around it is basically impossible
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## Data Objects
> Not 100% accurate yet and *might* change slightly
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### Creation
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```python
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# needs to be added
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```
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If you just want to start implementing, then just use the code example I provided, I don't care.
For those who don't want any bugs and use it as intended *(which is recommended, cuz I am only one person so there are defs bugs)* continue reading, and read the whole documentation, which may exist in the future xD
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[i10]: https://github.com/HeIIow2/music-downloader/issues/10
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[i2]: https://github.com/HeIIow2/music-downloader/issues/2