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path: root/src/DevHive.Services/Services/LanguageService.cs
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using System;
using System.Threading.Tasks;
using AutoMapper;
using DevHive.Data.Models;
using DevHive.Data.Repositories;
using DevHive.Services.Models.Language;

namespace DevHive.Services.Services
{
	public class LanguageService
	{
		private readonly LanguageRepository _languageRepository;
		private readonly IMapper _languageMapper;

		public LanguageService(LanguageRepository languageRepository, IMapper mapper)
		{
			this._languageRepository = languageRepository;
			this._languageMapper = mapper;
		}

		public async Task<bool> CreateLanguage(CreateLanguageServiceModel createLanguageServiceModel)
		{
			if (await this._languageRepository.DoesLanguageNameExistAsync(createLanguageServiceModel.Name))
				throw new ArgumentException("Language already exists!");

			//TODO: Fix, cuz it breaks
			Language language = this._languageMapper.Map<Language>(createLanguageServiceModel);
			bool result = await this._languageRepository.AddAsync(language);

			return result;
		}

		public async Task<LanguageServiceModel> GetLanguageById(Guid id)
		{
			Language language = await this._languageRepository.GetByIdAsync(id);

			if (language == null)
				throw new ArgumentException("The language does not exist");

			return this._languageMapper.Map<LanguageServiceModel>(language);
		}

		public async Task<bool> UpdateLanguage(UpdateLanguageServiceModel languageServiceModel)
		{
			Task<bool> langExist = this._languageRepository.DoesLanguageExistAsync(languageServiceModel.Id);
			Task<bool> newLangNameExists = this._languageRepository.DoesLanguageNameExistAsync(languageServiceModel.Name);

			await Task.WhenAny(langExist, newLangNameExists);

			if (!langExist.Result)
				throw new ArgumentException("Language already exists!");

			if (newLangNameExists.Result)
				throw new ArgumentException("This name is already in our datbase!");

			Language lang = this._languageMapper.Map<Language>(languageServiceModel);
			return await this._languageRepository.EditAsync(lang);
		}

		public async Task<bool> DeleteLanguage(Guid id)
		{
			if (!await this._languageRepository.DoesLanguageExistAsync(id))
				throw new ArgumentException("Language does not exist!");

			Language language = await this._languageRepository.GetByIdAsync(id);
			return await this._languageRepository.DeleteAsync(language);
		}
	}
}