MusicCatalogue.Entities 1.11.0

MusicCatalogue

Contents

• Overview
• Console Lookup Tool
• UI
• Web Service
• Application Configuration File
• Album Lookup
• SQLite Database

Overview

<img src="diagrams/application-schematic.png" alt="Application Schematic" width="600">

• The Music Catalogue repository is intended to provide a catalogue for a private music collection
• It supports the following functions:
  • Music catalogue collection browser (artists, albums and tracks)
  • A "wish list" of albums with the ability to move albums between the main catalogue and the wish list at will
  • Album search
  • External API integration for looking up new albums
  • Data import from CSV format files
  • Data export as CSV or Excel workbooks
• It contains the following components:

• NuGet packages are available for the entities, data and logic
• Docker builds of the REST API and GUI are also available

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The Console Lookup Tool

Overview

• The console application provides a simple command line interface for:
  • Looking up albums one at a time, given an artist and album title
  • Importing data from CSV files
  • Exporting data to CSV files or Excel workbooks
• The album lookup facility uses the algorithm described under "Album Lookup", below
• Consequently, searching for an album that's not currently in the catalogue will add it to the local database
• The console application doesn't use the web service (see below) and can be used standalone

Configuration

• The console application uses an "appsettings.json" file to hold configuration settings
• It's described in the "Application Configuration File" section, below

Command Line Options

• The following command line arguments are supported:

• For album lookups
  • It is recommended that the artist name and album title are both double-quoted
  • This is mandatory if either contains spaces
  • The target determines whether the album is tagged as being in the wish list or the main catalogue:

• For data exports, the exported format is based on the file extension for the supplied file path:

CSV File Format

• The first row in the CSV file is expected to contain headers and is ignored
• Durations should be specified in MM:SS format, e.g. "03:10" for 3 minutes and 10 seconds
• The following is an example, illustrating the format for the headers and for the rows containing data:

Artist,Album,Genre,Released,Cover Url,Track Number,Track,Duration,Wish List,Purchase Date,Price,Retailer
George Harrison,All Things Must Pass,Rock & Roll,1970,https://www.theaudiodb.com/images/media/album/thumb/all-things-must-pass-4f09954aa6370.jpg,1,I'd Have You Anytime,02:56,False,12/11/2023,59.07,Amazon

• Exports include all albums in both the main catalogue and the wish list

Example - Album Lookup

• The following command will look-up the album "Blue Train" by John Coltrane
• In this example, if the album isn't stored locally and is looked up using the external APIs (see below) the results will be stored in the main cataloge

MusicCatalogue.LookupTool --lookup "John Coltrane" "Blue Train" catalogue

• The output lists the album details and the number, title and duration of each track:

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GUI

Overview

• The GUI is written using React.js
• It provides facilities to:
  • Browse the artists, albums and track lists in the collection
  • Perform album lookups, given an artist name and title
• The album lookup facility uses the algorithm described under "Album Lookup", below
• Consequently, searching for an album that's not currently in the catalogue will add it to the local database
• The GUI uses the web service (see below) to retrieve and lookup data

Configuration

• The UI uses a simple "config.json" file containing the base URL for the Music Catalogue web service and locale settings used by the UI:

{
  "api": {
    "baseUrl": "http://localhost:8098"
  },
  "region": {
    "locale": "en-GB",
    "currency": "GBP"
  }
}

Login

• On browing to the application, the login dialog is displayed, prompting for a username and password
• This authenticates with the web service (see below), so a valid login in the local database is required
• Instructions on adding a user to the database are given in the "Database Users" section, below

Browsing the Catalogue

Main Catalogue

• After logging in, the "Artists" page is displayed, listing the artists currently in the database
• This acts as the home page for the site and clicking on the "Artists" menu item or the site logo navigates back to it

<img src="diagrams/artist-list.png" alt="Artist List" width="600">

• As the mouse pointer is moved up and down the table, the current row is highlighted
• Clicking on a row opens the album list for the artist shown in that row:

<img src="diagrams/album-list.png" alt="Album List" width="600">

• As the mouse pointer is moved up and down the table, the current row is highlighted
• Clicking on the trash icon prompts for confirmation and, if confirmed, deletes the album shown in that row along with the associated tracks
• Clicking on the "heart" icon moves the album from the main catalogue to the wish list then refreshes the album list
• Clicking on the "money" icon opens a form allowing the purchase details to be set:

<img src="diagrams/purchase-details.png" alt="Purchase Details" width="600">

• Clicking anywhere else on a row opens the track list for the album shown in that row:

<img src="diagrams/track-list.png" alt="Track List" width="600">

• Clicking on the artist name in any row in the track list or clicking on the "Back" button returns to the album list for that artist

The Wish List

• To view the wish list, click on the "Wish List" menu item
• A page identical in layout to the "Artists" page is displayed, but with a title indicating that it is the wish list
• The page operates in an identical manner to the "Artists" page and clicking on a row in the table navigates to the wish list for that artist:

<img src="diagrams/wish-list-album-list.png" alt="Wish List Album List" width="600">

• Clicking on a row drills into the album content, as per the "Artists" page
• Clicking on the trash icon prompts for confirmation and, if confirmed, deletes the album shown in that row along with the associated tracks
• Clicking on the vinyl record icon moves the album from the wish list to the main catalogue then refreshes the album list
• Clicking on the money icon opens the purchase details page and allows the price and a potential retailer to be set, but not the purchase date

Album Lookup

• To search for an album, click on the "Search" menu bar item:

<img src="diagrams/album-search.png" alt="Album Search" width="600">

• Enter the artist name and album title and select the catalogue to save the album to, either the main catalogue or the wish list
• Click on "Lookup" to search for the album
• If the album is found, the track list for the album is displayed
• The album lookup facility uses the algorithm described under "Album Lookup", below
• Consequently, searching for an album that's not currently in the catalogue will add it to the local database

Data Import

• This is scheduled for implementation in a future iteration of the UI

Data Export

• To export the music catalogue, click on the "Export" menu bar item:

<img src="diagrams/catalogue-export.png" alt="Music Catalogue Export" width="600">

• Enter the file name, without a path, and click on the "Export" button to request an export
• A request is sent to the web service to perform an export of the catalogue in the background
• The "export" page is updated when the request has been sent:

<img src="diagrams/catalogue-export-requested.png" alt="Music Catalogue Export" width="600">

• Once the export is complete, the file will appear in the folder indicated by the "CatalogueExportPath" configuration setting (see below)
• The exported format is based on the file extension for the supplied file path, as per the command-line tool (see above)

Reports

Genre Statistics Report

• To view a summary report by genre, jobs, click on the "Reports > Genre Statistics" menu bar item:

<img src="diagrams/reports-genre-statistics.png" alt="Genre Statistics Report" width="600">

• Use the drop down to select the catalogue to report on, either the main catalogue or the wish list
• If no selection is made, the report is generated for the main catalogue
• Click on the "Search" button to view the results

Job Status Report

• To view a report on the status of background export jobs, click on the "Reports > Job Status" menu bar item:

<img src="diagrams/reports-job-status.png" alt="Job Status Report" width="600">

• Use the date pickers to select the start and end dates for the report
• If no dates are selected, all job status records will be returned
• Click on the "Search" button to view the results
• Records are included from 00:00 on the start date up to and including 23:59 on the end date

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Web Service

Facilities

• The REST Web Service implements endpoints for
  • Authenticating registered users
  • Retrieving artist details from the local database
  • Retrieving album and track details from the local database
  • Looking up albums via the external APIs (see below)
  • Managing retailers and purchase details
• The external lookup uses the "album lookup" algorithm described under "Album Lookup", below
• Swagger documentation exposed at:

/swagger/index.html

• For full details of the service endpoints, it's recommended to build and run the service and review the documentation exposed at the above URL

Configuration

• The web service uses an "appsettings.json" file to hold configuration settings
• It's described in the "Application Configuration File" section, below

Authentication

• The service uses bearer token authentication, so clients should:
  • Use the /users/authenticate endpoint to get a token
  • Set the authorization header in subsequent requests:

Authorization: Bearer <token>

Database Users

• To authenticate, users must have a record in the USERS table of the database associating a username with their hashed password
• The following is a code snippet for adding a user to the database:

var userName = "SomeUser";
var password = "ThePassword";
var context = new MusicCatalogueDbContextFactory().CreateDbContext(Array.Empty<string>());
var factory = new MusicCatalogueFactory(context);
Task.Run(() => factory.Users.AddAsync(userName, password)).Wait();

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Application Configuration File

• The console application and web service use a common configuration file format, described in this section
• The GUI has a much simpler configuration file that's described along with the UI, above

General Settings and Database Connection String

• The appsettings.json file in the console application project contains the following keys for controlling the application:

External API Configuration

• The lookup tool and web service include integration with the TheAudioDB public API for artist, album and track details lookup:

TheAudioDB

• To use the integration, a RapidAPI subscription is needed, as this includes an API key needed to acces the APIs
• Signup is free, but daily free usage is restricted with a nominal charge being made for requests above the free limit
• The integration is configured via the following keys in the configuration file:

ApiEndpoint Definitions

• An example API endpoint definition is shown below:

{
  "EndpointType": "Albums",
  "Service": "TheAudioDB",
  "Url": "https://theaudiodb.p.rapidapi.com/searchalbum.php"
}

• Possible values for the endpoint type are:

• Currently, only the TheAudioDB APIs are supported

ApiServiceKey Definitions

• An example key definition for a service is shown below:

{
  "Service": "TheAudioDB",
  "Key": "put-your-RapidPI-key-here"
}

• The "Key" can also specify an external text file in an alternative location containing a single line holding the API key
• This approach is used in the Docker image of the API, where the key file is mounted from the host, avoiding baking the API key into the image

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Album Lookup

• The local SQLite database is searched preferentially for album details
• The external APIs are only used if an artist and/or album aren't found locally
• Details returned by the external APIs are stored in the local database provided the returned data is complete:
  • The artist is found
  • The album is found
  • The album has at least one track associated with it
• Consequently, subsequent searches with the same criteria will return data from the local database, not the APIs
• Artist names, album titles and track names are stored in title case
• Searches convert the search criteria to title case when looking details up in the database

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SQLite Database

Database Schema

• Note that the "Duration" field on the TRACKS table denotes the track duration in ms

Database Management

• The application uses Entity Framework Core and initial creation and management of the database is achieved using EF Core database migrations
• To create the database for the first time, first install the .NET Core SDK and then install the "dotnet ef" tool:

dotnet tool install --global dotnet-ef

• Update the database path in the "appsettings.json" file in the terminal application project to point to the required database location
• Build the solution
• Open a terminal window and change to the MusicCatalogue.Data project
• Run the following command, making sure to use the path separator appropriate for your OS:

dotnet ef database update -s ../MusicCatalogue.LookupTool/MusicCatalogue.LookupTool.csproj

• If the database doesn't exist, it will create it
• It will then bring the database up to date by applying all pending migrations

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Authors

• Dave Walker - Initial work - LinkedIn

Feedback

To file issues or suggestions, please use the Issues page for this project on GitHub.

License

This project is licensed under the MIT License - see the LICENSE file for details.