public RecipeDisplayViewModel EntityToViewModel(RecipeEntity entity)
{
if (entity == null)
{
throw new ArgumentNullException(
"entity",
"Cannot convert an entity to a view model when no entity is passed.");
}
bool canEdit = false;
if (HttpContext.Current != null
&& HttpContext.Current.Request.IsAuthenticated)
{
canEdit = WebSecurity.CurrentUserId == entity.Contributor.UserId;
}
return new RecipeDisplayViewModel
{
RecipeId = entity.RecipeId,
Name = entity.Name,
Category = entity.Style.Category.ToString(),
Style = entity.Style.Name,
OriginalGravity = entity.OriginalGravity,
FinalGravity = entity.FinalGravity,
PercentAlcoholByVolume = entity.PercentAlcoholByVolume,
GrainBill = entity.GrainBill,
Instructions = entity.Instructions,
Slug = entity.Slug,
StyleSlug = entity.Style.Slug,
ContributedBy = entity.Contributor.UserName,
CanEdit = canEdit
};
}
public RecipeEditViewModel EntityToViewModel(RecipeEntity entity)
{
var editModel = new RecipeEditViewModel();
var styles = this._styleRepository.GetStyles();
editModel.StyleList = new SelectList(
styles,
"StyleId",
"Name",
0);
if (entity != null)
{
editModel.FinalGravity = entity.FinalGravity;
editModel.GrainBill = entity.GrainBill;
editModel.Instructions = entity.Instructions;
editModel.Name = entity.Name;
editModel.OriginalGravity = entity.OriginalGravity;
editModel.RecipeId = entity.RecipeId;
editModel.StyleId = entity.Style.StyleId;
editModel.Slug = entity.Slug;
}
return editModel;
}
/// <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();
}
/// <summary>
/// Assigns the values of a Recipe entity's
/// properties to the properties of a Recipe
/// data model.
/// </summary>
/// <param name="recipe">The Recipe entity
/// containing the property values to assign.
/// </param>
/// <param name="dbRecipe">The Recipe data
/// model to receive the property values.
/// </param>
private void AssignEntityToModel(RecipeEntity recipe, Recipe dbRecipe)
{
dbRecipe.FinalGravity = recipe.FinalGravity;
dbRecipe.GrainBill = recipe.GrainBill;
dbRecipe.Instructions = recipe.Instructions;
dbRecipe.Name = recipe.Name;
dbRecipe.OriginalGravity = recipe.OriginalGravity;
dbRecipe.RecipeId = recipe.RecipeId;
}
private bool CanEdit(RecipeEntity entity)
{
if (Request.IsAuthenticated)
{
return WebSecurity.CurrentUserId == entity.Contributor.UserId;
}
return false;
}