Kavita/API/Data/MigrateConfigFiles.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using API.Services;
using Kavita.Common;

namespace API.Data
{
    public static class MigrateConfigFiles
    {
        private static readonly List<string> LooseLeafFiles = new List<string>()
        {
            "appsettings.json",
            "appsettings.Development.json",
            "kavita.db",
        };

        private static readonly List<string> AppFolders = new List<string>()
        {
            "covers",
            "stats",
            "logs",
            "backups",
            "cache",
            "temp"
        };

        private static readonly string ConfigDirectory = Path.Join(Directory.GetCurrentDirectory(), "config");


        /// <summary>
        /// In v0.4.8 we moved all config files to config/ to match with how docker was setup. This will move all config files from current directory
        /// to config/
        /// </summary>
        public static void Migrate(bool isDocker)
        {
            Console.WriteLine("Checking if migration to config/ is needed");

            if (isDocker)
            {
                Console.WriteLine(
                    "Migrating files from pre-v0.4.8. All Kavita config files are now located in config/");

                CopyAppFolders();
                DeleteAppFolders();
                
                UpdateConfiguration();

                Console.WriteLine("Migration complete. All config files are now in config/ directory");
                return;
            }

            if (!new FileInfo(Path.Join(Directory.GetCurrentDirectory(), "appsettings.json")).Exists)
            {
                Console.WriteLine("Migration to config/ not needed");
                return;
            }

            Console.WriteLine(
                "Migrating files from pre-v0.4.8. All Kavita config files are now located in config/");

            Console.WriteLine($"Creating {ConfigDirectory}");
            DirectoryService.ExistOrCreate(ConfigDirectory);

            CopyLooseLeafFiles();

            CopyAppFolders();

            // Then we need to update the config file to point to the new DB file
            UpdateConfiguration();

            // Finally delete everything in the source directory
            Console.WriteLine("Removing old files");
            DeleteLooseFiles();
            DeleteAppFolders();
            Console.WriteLine("Removing old files...DONE");

            Console.WriteLine("Migration complete. All config files are now in config/ directory");
        }

        private static void DeleteAppFolders()
        {
            foreach (var folderToDelete in AppFolders)
            {
                if (!new DirectoryInfo(Path.Join(Directory.GetCurrentDirectory(), folderToDelete)).Exists) continue;

                DirectoryService.ClearAndDeleteDirectory(Path.Join(Directory.GetCurrentDirectory(), folderToDelete));
            }
        }

        private static void DeleteLooseFiles()
        {
            var configFiles = LooseLeafFiles.Select(file => new FileInfo(Path.Join(Directory.GetCurrentDirectory(), file)))
                .Where(f => f.Exists);
            DirectoryService.DeleteFiles(configFiles.Select(f => f.FullName));
        }

        private static void CopyAppFolders()
        {
            Console.WriteLine("Moving folders to config");
            foreach (var folderToMove in AppFolders)
            {
                if (new DirectoryInfo(Path.Join(ConfigDirectory, folderToMove)).Exists) continue;

                DirectoryService.CopyDirectoryToDirectory(Path.Join(Directory.GetCurrentDirectory(), folderToMove),
                    Path.Join(ConfigDirectory, folderToMove));
            }

            Console.WriteLine("Moving folders to config...DONE");
        }

        private static void CopyLooseLeafFiles()
        {
            var configFiles = LooseLeafFiles.Select(file => new FileInfo(Path.Join(Directory.GetCurrentDirectory(), file)))
                .Where(f => f.Exists);
            // First step is to move all the files
            Console.WriteLine("Moving files to config/");
            foreach (var fileInfo in configFiles)
            {
                try
                {
                    fileInfo.CopyTo(Path.Join(ConfigDirectory, fileInfo.Name));
                }
                catch (Exception)
                {
                    /* Swallow exception when already exists */
                }
            }

            Console.WriteLine("Moving files to config...DONE");
        }

        private static void UpdateConfiguration()
        {
            Console.WriteLine("Updating appsettings.json to new paths");
            Configuration.DatabasePath = "config//kavita.db";
            Configuration.LogPath = "config//logs/kavita.log";
            Console.WriteLine("Updating appsettings.json to new paths...DONE");
        }
    }
}