IW4M-Admin/Application/Misc/MetaService.cs

188 lines
5.9 KiB
C#
Raw Normal View History

using Microsoft.EntityFrameworkCore;
using SharedLibraryCore.Database.Models;
using SharedLibraryCore.Dtos;
using SharedLibraryCore.Interfaces;
using SharedLibraryCore.QueryHelper;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace IW4MAdmin.Application.Misc
{
/// <summary>
/// implementation of IMetaService
/// used to add and retrieve runtime and persistent meta
/// </summary>
public class MetaService : IMetaService
{
private readonly IDictionary<MetaType, List<dynamic>> _metaActions;
private readonly IDatabaseContextFactory _contextFactory;
private readonly ILogger _logger;
public MetaService(ILogger logger, IDatabaseContextFactory contextFactory)
{
_logger = logger;
_metaActions = new Dictionary<MetaType, List<dynamic>>();
_contextFactory = contextFactory;
}
public async Task AddPersistentMeta(string metaKey, string metaValue, EFClient client)
{
// this seems to happen if the client disconnects before they've had time to authenticate and be added
if (client.ClientId < 1)
{
return;
}
using var ctx = _contextFactory.CreateContext();
var existingMeta = await ctx.EFMeta
.Where(_meta => _meta.Key == metaKey)
.Where(_meta => _meta.ClientId == client.ClientId)
.FirstOrDefaultAsync();
if (existingMeta != null)
{
existingMeta.Value = metaValue;
existingMeta.Updated = DateTime.UtcNow;
}
else
{
ctx.EFMeta.Add(new EFMeta()
{
ClientId = client.ClientId,
Created = DateTime.UtcNow,
Key = metaKey,
Value = metaValue
});
}
await ctx.SaveChangesAsync();
}
public async Task<EFMeta> GetPersistentMeta(string metaKey, EFClient client)
{
using var ctx = _contextFactory.CreateContext(enableTracking: false);
return await ctx.EFMeta
.Where(_meta => _meta.Key == metaKey)
.Where(_meta => _meta.ClientId == client.ClientId)
.Select(_meta => new EFMeta()
{
MetaId = _meta.MetaId,
Key = _meta.Key,
ClientId = _meta.ClientId,
Value = _meta.Value
})
.FirstOrDefaultAsync();
}
public void AddRuntimeMeta<T, V>(MetaType metaKey, Func<T, Task<IEnumerable<V>>> metaAction) where T : PaginationRequest where V : IClientMeta
{
if (!_metaActions.ContainsKey(metaKey))
{
_metaActions.Add(metaKey, new List<dynamic>() { metaAction });
}
else
{
_metaActions[metaKey].Add(metaAction);
}
}
public async Task<IEnumerable<IClientMeta>> GetRuntimeMeta(ClientPaginationRequest request)
{
var meta = new List<IClientMeta>();
foreach (var (type, actions) in _metaActions)
{
// information is not listed chronologically
if (type != MetaType.Information)
{
var metaItems = await actions[0](request);
meta.AddRange(metaItems);
}
}
return meta.OrderByDescending(_meta => _meta.When)
.Take(request.Count)
.ToList();
}
public async Task<IEnumerable<T>> GetRuntimeMeta<T>(ClientPaginationRequest request, MetaType metaType) where T : IClientMeta
{
IEnumerable<T> meta;
if (metaType == MetaType.Information)
{
var allMeta = new List<T>();
foreach (var individualMetaRegistration in _metaActions[metaType])
{
allMeta.AddRange(await individualMetaRegistration(request));
}
return ProcessInformationMeta(allMeta);
}
else
{
meta = await _metaActions[metaType][0](request) as IEnumerable<T>;
}
return meta;
}
private static IEnumerable<T> ProcessInformationMeta<T>(IEnumerable<T> meta) where T : IClientMeta
{
var table = new List<List<T>>();
var metaWithColumn = meta
.Where(_meta => _meta.Column != null);
var columnGrouping = metaWithColumn
.GroupBy(_meta => _meta.Column);
var metaToSort = meta.Except(metaWithColumn).ToList();
foreach (var metaItem in columnGrouping)
{
table.Add(new List<T>(metaItem));
}
while (metaToSort.Count > 0)
{
var sortingMeta = metaToSort.First();
int indexOfSmallestColumn()
{
int index = 0;
int smallestColumnSize = int.MaxValue;
for (int i = 0; i < table.Count; i++)
{
if (table[i].Count < smallestColumnSize)
{
smallestColumnSize = table[i].Count;
index = i;
}
}
return index;
}
int columnIndex = indexOfSmallestColumn();
sortingMeta.Column = columnIndex;
sortingMeta.Order = columnGrouping
.First(_group => _group.Key == columnIndex)
.Count();
table[columnIndex].Add(sortingMeta);
metaToSort.Remove(sortingMeta);
}
return meta;
}
}
}