/// <summary>
/// Update the specified article. Increment the version if required.
/// </summary>
/// <param name="article"></param>
/// <param name="backupVersion">If true the previous article version is saved as a backup in the VersionedArticle and the current version is incremented.</param>
public override void UpdateArticle(Article article, bool backupVersion)
{
using (TransactionScope transaction = new TransactionScope(mConfiguration))
{
ArticleDataStore dataStore = new ArticleDataStore(transaction);
VersionedArticle versionedArticle = null;
if (backupVersion)
{
//Retrive the previous version (before saving the new instance) and save a versioned row
Article prevVersion = dataStore.FindByKey(article.Id);
if (prevVersion == null)
throw new ArticleNotFoundException(article.Id);
versionedArticle = new VersionedArticle(prevVersion);
VersionedArticleDataStore versionedStore = new VersionedArticleDataStore(transaction);
versionedStore.Insert(versionedArticle);
//Increment the current article version
article.IncrementVersion();
}
//flag the entity to be updated and attach the entity to the db
// I must use InsertOrUpdateCopy because if backupVersion = true there is already a
// persistent entity in the session and I must copy the values to this instance. The Update method in this case throw an exception
article = dataStore.InsertOrUpdateCopy(article);
transaction.Commit();
}
}
/// <summary>
/// Returns the specified version of the article. If the version is equal the article.Version then the article is returned.
/// </summary>
/// <param name="article"></param>
/// <param name="version"></param>
/// <returns></returns>
public override ArticleBase GetArticleByVersion(Article article, int version)
{
if (article.Version == version)
return article;
using (TransactionScope transaction = new TransactionScope(mConfiguration))
{
VersionedArticleDataStore dataStore = new VersionedArticleDataStore(transaction);
VersionedArticle versionedArticle = dataStore.FindByArticleVersion(article, version);
if (versionedArticle == null)
throw new ArticleNotFoundException(article.Name + " " + version.ToString());
return versionedArticle;
}
}
/// <summary>
/// Get a list of article versions (also with the latest version)
/// </summary>
/// <param name="article"></param>
/// <returns></returns>
public override IList<ArticleBase> GetArticleVersions(Article article)
{
using (TransactionScope transaction = new TransactionScope(mConfiguration))
{
VersionedArticleDataStore dataStore = new VersionedArticleDataStore(transaction);
IList<VersionedArticle> versionedArticles = dataStore.GetArticleVersions(article);
List<ArticleBase> list = new List<ArticleBase>();
//Add the latest version
list.Add(article);
//add all the other versions
foreach (VersionedArticle verArticle in versionedArticles)
list.Add(verArticle);
return list;
}
}
public override void DeleteArticleVersion(VersionedArticle article)
{
using (TransactionScope transaction = new TransactionScope(mConfiguration))
{
VersionedArticleDataStore dataStore = new VersionedArticleDataStore(transaction);
dataStore.Delete(article.Id);
transaction.Commit();
}
}