ErsatzTV/ErsatzTV.Infrastructure/Data/DbInitializer.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Threading;
using System.Threading.Tasks;
using ErsatzTV.Core.Domain;
using LanguageExt;

namespace ErsatzTV.Infrastructure.Data
{
    public static class DbInitializer
    {
        public static async Task<Unit> Initialize(TvContext context, CancellationToken cancellationToken)
        {
            if (!context.LanguageCodes.Any())
            {
                var assembly = Assembly.GetEntryAssembly();
                if (assembly != null)
                {
                    await using Stream resource =
                        assembly.GetManifestResourceStream("ErsatzTV.Resources.ISO-639-2_utf-8.txt");
                    if (resource != null)
                    {
                        using var reader = new StreamReader(resource);
                        while (!reader.EndOfStream)
                        {
                            string line = await reader.ReadLineAsync();
                            if (line != null)
                            {
                                string[] split = line.Split("|");
                                if (split.Length == 5)
                                {
                                    var languageCode = new LanguageCode
                                    {
                                        ThreeCode1 = split[0],
                                        ThreeCode2 = split[1],
                                        TwoCode = split[2],
                                        EnglishName = split[3],
                                        FrenchName = split[4]
                                    };

                                    await context.LanguageCodes.AddAsync(languageCode, cancellationToken);
                                }
                            }
                        }
                    }
                }

                await context.SaveChangesAsync(cancellationToken);
            }

            if (context.Resolutions.Any())
            {
                return Unit.Default;
            }

            var resolutions = new List<Resolution>
            {
                new() { Id = 1, Name = "720x480", Width = 720, Height = 480 },
                new() { Id = 2, Name = "1280x720", Width = 1280, Height = 720 },
                new() { Id = 3, Name = "1920x1080", Width = 1920, Height = 1080 },
                new() { Id = 4, Name = "3840x2160", Width = 3840, Height = 2160 }
            };
            await context.Resolutions.AddRangeAsync(resolutions, cancellationToken);
            await context.SaveChangesAsync(cancellationToken);

            var resolutionConfig = new ConfigElement
            {
                Key = ConfigElementKey.FFmpegDefaultResolutionId.Key,
                Value = "3" // 1920x1080
            };
            await context.ConfigElements.AddAsync(resolutionConfig, cancellationToken);
            await context.SaveChangesAsync(cancellationToken);

            var defaultProfile = FFmpegProfile.New("1920x1080 x264 ac3", resolutions[2]);
            await context.FFmpegProfiles.AddAsync(defaultProfile, cancellationToken);
            await context.SaveChangesAsync(cancellationToken);

            var profileConfig = new ConfigElement
            {
                Key = ConfigElementKey.FFmpegDefaultProfileId.Key,
                Value = defaultProfile.Id.ToString()
            };
            await context.ConfigElements.AddAsync(profileConfig, cancellationToken);
            await context.SaveChangesAsync(cancellationToken);

            var defaultChannel = new Channel(Guid.NewGuid())
            {
                Number = "1",
                Name = "ErsatzTV",
                FFmpegProfile = defaultProfile,
                StreamingMode = StreamingMode.TransportStream
            };
            await context.Channels.AddAsync(defaultChannel, cancellationToken);
            await context.SaveChangesAsync(cancellationToken);

            // TODO: create looping static image that mentions configuring via web
            return Unit.Default;
        }
    }
}