private void AssignEntityToModel(UserProfileEntity userProfile, UserProfile dbUserProfile)
{
dbUserProfile.UserId = userProfile.UserId;
dbUserProfile.UserName = userProfile.UserName;
}
/// <summary>
/// Saves the state of a recipe to persistent
/// storage.
/// </summary>
/// <param name="recipeEntity">The recipe to persist
/// in storage.</param>
public void Save(RecipeEntity recipeEntity)
{
if (recipeEntity == null)
{
throw new ArgumentNullException("recipe",
"You must specify a recipe to save.");
}
if (recipeEntity.Style == null)
{
throw new InvalidOperationException(
"Recipes require a style.");
}
if (recipeEntity.Contributor == null)
{
throw new InvalidOperationException(
"Recipes require a contributor.");
}
// Load the style assigned to the recipe. We load this because
// it may change from whatthe current db model is.
var existingStyleModel = new Style();
AssignEntityToModel(recipeEntity.Style, existingStyleModel);
this
.Context
.Styles
.Attach(existingStyleModel);
// If it's a new recipe we have to do a decent bit of work.
if (recipeEntity.RecipeId == 0)
{
// Create the recipe.
var newRecipeModel = new Recipe();
// Add the recipe to the context for change tracking.
this.Context.Recipes.Add(newRecipeModel);
// Assumes the user already exists and the domain has validated
// this is the user that created the model
var existingUserModel = new UserProfile();
AssignEntityToModel(recipeEntity.Contributor, existingUserModel);
this
.Context
.UserProfiles
.Attach(existingUserModel);
// Assign the properties that can only be assigned on creation.
newRecipeModel.Style = existingStyleModel;
newRecipeModel.Slug = recipeEntity.Slug;
newRecipeModel.Contributor = existingUserModel;
AssignEntityToModel(recipeEntity, newRecipeModel);
this.Context.SaveChanges();
recipeEntity.RecipeId = newRecipeModel.RecipeId;
return;
}
var recipeModel = this
.Context
.Recipes
.Include("Style")
.Include("Contributor")
.FirstOrDefault(r => r.RecipeId == recipeEntity.RecipeId);
if (recipeModel == null)
{
throw new InvalidOperationException(
"The recipe being modified does not exist.");
}
AssignEntityToModel(recipeEntity, recipeModel);
recipeModel.Style = existingStyleModel;
this.Context.SaveChanges();
}
public void SaveReview(ReviewEntity review)
{
// It's not a new review. Update the value.
var recipe = Context
.Recipes
.FirstOrDefault(r => r.RecipeId == review.RecipeId);
if (recipe == null)
{
throw new InvalidOperationException(
"Cannot save review without a recipe.");
}
// It's a new review.
if (review.ReviewId == 0)
{
var modelReview = new Review();
AssignEntityToModel(review, modelReview);
var userProfile = new UserProfile();
userProfile.UserId = review.Reviewer.UserId;
userProfile.UserName = review.Reviewer.UserName;
this
.Context
.UserProfiles
.Attach(userProfile);
modelReview.Reviewer = userProfile;
recipe.Reviews.Add(modelReview);
Context.SaveChanges();
review.ReviewId = modelReview.ReviewId;
return;
}
// Add the review to the recipe.
var oldReviewModel = recipe
.Reviews
.FirstOrDefault(r => r.ReviewId == review.ReviewId);
if (oldReviewModel == null)
{
throw new ArgumentOutOfRangeException("review",
"Cannot edit the review as it cannot be located.");
}
AssignEntityToModel(review, oldReviewModel);
Context.SaveChanges();
}