/// <summary>
/// Update the tags associated with a content container that has been edited
/// </summary>
/// <param name="contentContainer"></param>
/// <param name="listOfTags"></param>
private void UpdateTagsInContentContainer(ContentContainer contentContainer, string listOfTags)
{
IEnumerable<string> formattedListOfTags = ExtractTagsFromString(listOfTags);
// gets a IEnumerable of string tags from the comma separated list of tags
DeleteTagsFromContentContainer(contentContainer, formattedListOfTags);
// add tags
AddListOfTagsToContentContainer(contentContainer, formattedListOfTags);
}
/// <summary>
/// Update the categories associated with a content container that has been edited
/// </summary>
/// <param name="contentContainer"></param>
/// <param name="categoryId"></param>
private void UpdateCategoriesInContentContainer(ContentContainer contentContainer, int[] categoryId)
{
// Delete association with categories no longer selected
DeleteCategoriesFromContentContainer(contentContainer, categoryId);
// Add association with categories that have been selected
AddCategoriesToContentContainer(contentContainer, categoryId);
}
/// <summary>
/// Deletes the association between a content container and those tags that are no longer selected
/// </summary>
/// <param name="contentContainer"></param>
/// <param name="stringTags"></param>
private void DeleteTagsFromContentContainer(ContentContainer contentContainer, IEnumerable<string> stringTags)
{
var query = from tag in contentContainer.Tags
from tagString in stringTags
where tag.Name == tagString
select tag;
var tagsPresent = query.Distinct().ToList();
// Delete the association with tags that are no longer needed
// select tags to delete
List<Tag> tagsToDelete = contentContainer.Tags.Where(tag => !tagsPresent.Contains(tag)).ToList();
// delete them
foreach(var tag in tagsToDelete)
contentContainer.Tags.Remove(tag);
}
/// <summary>
/// Deletes the associations with categories that are no longer selected
/// </summary>
/// <param name="contentContainer"></param>
/// <param name="categoryId"></param>
private void DeleteCategoriesFromContentContainer(ContentContainer contentContainer, int[] categoryId)
{
if (categoryId != null)
{
// This should be improved****
var query = from category in contentContainer.Categories
from id in categoryId
where category.CategoryID == id
select category;
List<Category> categoriesPresent = query.Distinct().ToList();
// Delete those not present
// Select categories to delete
List<Category> categoriesToDelete = contentContainer.Categories.Where(category => !categoriesPresent.Contains(category)).ToList();
// Delete them
foreach (var category in categoriesToDelete)
contentContainer.Categories.Remove(category);
}
else
{
while (contentContainer.Categories.Count > 0)
contentContainer.Categories.RemoveAt(0);
}
}
/// <summary>
/// Method that adds the tags represented by a string list of tags to a certain
/// contentContainer
/// </summary>
/// <param name="contentContainer"></param>
/// <param name="listOfTags"></param>
private void AddListOfTagsToContentContainer(ContentContainer contentContainer, IEnumerable<string> listOfTags)
{
IEnumerable<Tag> tags = ManageTagsFromListOfTags(listOfTags);
foreach (Tag tag in tags)
{
if (!contentContainer.Tags.Contains(tag))
contentContainer.Tags.Add(tag);
}
}
/// <summary>
/// Adds the categories that have been selected to a given content container
/// </summary>
/// <param name="contentContainer"></param>
/// <param name="categories"></param>
private void AddCategoriesToContentContainer(ContentContainer contentContainer, int[] categories)
{
if (categories != null)
{
foreach (var categoryID in categories)
{
// get category from database
Category category = _context.Categories.Single(x => x.CategoryID == categoryID);
// add it to blogPost
if (!contentContainer.Categories.Contains(category))
contentContainer.Categories.Add(category);
}
}
}
