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import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { SimpleModel } from '../models/common/SimpleModel';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class DataService<T extends SimpleModel> {

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public class Ingredient : BaseEntity 
{ 
   public string Name { get; set; } 
   public int Amount { get; set; } 
   [ForeignKey("Recipe")] 
   public int RecipeId { get; set; } 
   public Recipe Recipe { get; set; } 
}

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public class Recipe : BaseEntity 
{ 
   public string Name { get; set; } 
   public string Description { get; set; } 
   public string ImagePath { get; set; } 
   public RecipeDifficulty Difficulty { get; set; } 
   public int Time { get; set; }
 
   public IEnumerable<Ingredient> Ingredients { get; set; } 

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public class User : BaseEntity 
{ 
   public string Name { get; set; } 
   public string Email { get; set; } 
   public IEnumerable<Recipe> Recipes { get; set; } 
}

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"ConnectionStrings": 
{ 
   "DatabaseConnection": "Server=(localdb)\mssqllocaldb;Database=MyCookingMaster;Trusted_Connection=True" 
}

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public class ApplicationDbContext : DbContext 
{ 
   public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : base(options) { } 

   public virtual DbSet<User> Users { get; set; } 
   public virtual DbSet<Recipe> Recipes { get; set; } 
   public virtual DbSet<Ingredient> Ingredients { get; set; } 
}

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public class DesignTimeDbContextFactory : IDesignTimeDbContextFactory<ApplicationDbContext> 
{ 
   public ApplicationDbContext CreateDbContext(string[] args) 
   { 
      IConfigurationRoot configuration = new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory()).AddJsonFile(@Directory.GetCurrentDirectory() + "/../MyCookingMaster.API/appsettings.json").Build(); 
      var builder = new DbContextOptionsBuilder<ApplicationDbContext>(); 
      var connectionString = configuration.GetConnectionString("DatabaseConnection"); 
      builder.UseSqlServer(connectionString); 
      return new ApplicationDbContext(builder.Options); 
   } 

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public class DataSeeder 
{ 
   public static void Initialize(ApplicationDbContext context) 
   { 
      if (!context.Users.Any()) 
      { 
         var users = new List<User>() 
         { 
            new User { /*Id = 1,*/ Name = "John", Email = "john@john.com" }, 
            new User { /*Id = 2,*/ Name = "Michael", Email = "michael@michael.com" } 

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public class Program 
{ 
   public static void Main(string[] args) 
   { 
      var host = CreateWebHostBuilder(args).Build(); 
      using (var scope = host.Services.CreateScope()) 
      { 
         var services = scope.ServiceProvider; 
         try 
         { 

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public void ConfigureServices(IServiceCollection services) 
{ 
   services.AddDbContext<ApplicationDbContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DatabaseConnection"))); 
   services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2).AddJsonOptions(options => 
   { 
      options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore; 
   }); 
}