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using AutoMapper;
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using Core.Contexts;
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using Models.Tags;
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using Serilog;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Core.Services.TagService
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{
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public class TagServiceEF : ITagService
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{
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private readonly DatabaseContext databaseContext;
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private readonly ILogger logger;
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private readonly IMapper mapper;
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public TagServiceEF(DatabaseContext databaseContext, ILogger logger, IMapper mapper)
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{
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this.databaseContext = databaseContext;
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this.logger = logger;
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this.mapper = mapper;
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}
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public TagTreeResponse GetTagTree()
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{
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// Prefetch from DB
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var tagCategories = databaseContext.TagCategories.Select(tc => tc).ToList();
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var tags = databaseContext.Tags.Select(tc => tc).ToList();
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var subTags = databaseContext.SubTags.Select(tc => tc).ToList();
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var tagCategoriesDTOs = new List<TagCategoryInfo>();
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foreach (var tagCategory in tagCategories)
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{
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var tagCategoryDTO = mapper.Map<TagCategoryInfo>(tagCategory);
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var categoryTags = tags.Where(t => t.Category == tagCategory);
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var tagDTOs = new List<TagInfo>();
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foreach (var tag in categoryTags)
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{
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var tagDTO = mapper.Map<TagInfo>(tag);
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var tagSubTags = subTags.Where(st => st.Tag == tag).ToList();
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var subTagDTOs = new List<SubTagInfo>();
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if (tagSubTags.Count() != 0)
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{
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foreach (var subTag in tagSubTags)
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{
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subTagDTOs.Add(mapper.Map<SubTagInfo>(subTag));
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}
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}
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tagDTO.SubTags = subTagDTOs;
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tagDTOs.Add(tagDTO);
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}
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tagCategoryDTO.Tags = tagDTOs;
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tagCategoriesDTOs.Add(tagCategoryDTO);
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}
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return new TagTreeResponse()
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{
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TagCategories = tagCategoriesDTOs
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};
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}
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public void CreateCategory(CreateCategoryRequest request)
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{
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if (request.Color == "" || request.Name == "")
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{
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throw new InvalidOperationException("Category name or color empty");
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}
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CategoryNameUnusedOrThrow(request.Name);
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databaseContext.TagCategories.Add(new Entities.TagCategory()
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{
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Name = request.Name,
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Color = request.Color,
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Description = request.Description
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});
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databaseContext.SaveChanges();
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}
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public void DeleteCategory(Guid categoryId)
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{
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CategoryExistsOrThrow(categoryId);
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var category = databaseContext.TagCategories.First(tc => tc.Id == categoryId);
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databaseContext.TagCategories.Remove(category);
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databaseContext.SaveChanges();
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}
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public void UpdateCategory(ModifyCategoryRequest request, Guid categoryId)
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{
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CategoryExistsOrThrow(categoryId);
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var category = databaseContext.TagCategories.First(tc => tc.Id == categoryId);
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if (request.Name != null)
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{
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CategoryNameUnusedOrThrow(request.Name);
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category.Name = request.Name;
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}
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if (request.Description != null)
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{
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category.Description = request.Description;
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}
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if (request.Color != null)
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{
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if (request.Color == "")
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{
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throw new InvalidOperationException("Empty color");
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}
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category.Color = request.Color;
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}
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databaseContext.SaveChanges();
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}
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public void CreateTag(CreateTagRequest request)
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{
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CategoryExistsOrThrow(request.CategoryId);
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TagNameUnusedOrThrow(request.Name);
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if (request.Color == "")
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{
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throw new InvalidOperationException("Color empty");
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}
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var category = databaseContext.TagCategories.First(tc => tc.Id == request.CategoryId);
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databaseContext.Tags.Add(new Entities.Tag()
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{
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Name = request.Name,
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Color = request.Color,
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Description = request.Description,
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Category = category
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});
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databaseContext.SaveChanges();
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}
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public void DeleteTag(Guid tagId)
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{
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TagExistsOrThrow(tagId);
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var tag = databaseContext.Tags.First(t => t.Id == tagId);
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databaseContext.Tags.Remove(tag);
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}
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public void UpdateTag(ModifyTagRequest request, Guid tagId)
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{
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TagExistsOrThrow(tagId);
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var tag = databaseContext.Tags.First(t => t.Id == tagId);
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if (request.Name != null)
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{
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TagNameUnusedOrThrow(request.Name);
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tag.Name = request.Name;
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}
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if (request.Color != null)
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{
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if (request.Color == "")
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{
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throw new InvalidOperationException("Color empty");
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}
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tag.Color = request.Color;
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}
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if (request.Description != null)
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{
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tag.Description = request.Description;
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}
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databaseContext.SaveChanges();
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}
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private void CategoryExistsOrThrow(Guid categoryId)
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{
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if (!databaseContext.TagCategories.Any(tc => tc.Id == categoryId))
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{
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throw new InvalidOperationException("Category does not exist");
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}
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}
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private void CategoryNameUnusedOrThrow(string name)
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{
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if (databaseContext.TagCategories.Any(tc => tc.Name == name))
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{
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throw new InvalidOperationException("Category name already used");
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}
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}
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private void TagExistsOrThrow(Guid tagId)
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{
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if (!databaseContext.Tags.Any(t => t.Id == tagId))
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{
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throw new InvalidOperationException("Tag does not exist");
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}
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}
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private void TagNameUnusedOrThrow(string name)
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{
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if (databaseContext.Tags.Any(t => t.Name == name))
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{
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throw new InvalidOperationException("Tag name already used");
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}
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}
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}
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}
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