/// <summary>
/// Write a new version of the topic (doesn't write a new version). Generate all needed federation update changes via the supplied generator.
/// </summary>
/// <param name="topic">Topic to write</param>
/// <param name="content">New content</param>
/// <param name="sink">Object to recieve change info about the topic</param>
override protected void WriteTopic(LocalTopicName topic, string content, FederationUpdateGenerator gen)
{
string root = Root;
string fullpath = MakePath(root, topic);
bool isNew = !(File.Exists(fullpath));
// Get old topic so we can analyze it for properties to compare with the new one
string oldText = null;
Hashtable oldProperties = null;
if (!isNew)
{
using (StreamReader sr = new StreamReader(new FileStream(fullpath, FileMode.Open, FileAccess.Read, FileShare.Read)))
{
oldText = sr.ReadToEnd();
}
oldProperties = ExtractExplicitFieldsFromTopicBody(oldText);
}
// Change it
using (StreamWriter sw = new StreamWriter(fullpath))
{
sw.Write(content);
}
// Quick check to see if we're about to let somebody write the DefinitionTopic for this ContentBase.
// If so, we reset our Info object to reread
string pathToDefinitionTopic = MakePath(Root, DefinitionTopicName.LocalName);
if (fullpath == pathToDefinitionTopic)
this.Federation.InvalidateNamespace(Namespace);
// Record changes
try
{
AbsoluteTopicName absTopic = topic.AsAbsoluteTopicName(Namespace);
gen.Push();
// Record the topic-level change
if (isNew)
gen.RecordCreatedTopic(absTopic);
else
gen.RecordUpdatedTopic(absTopic);
// Now process the properties
Hashtable newProperties = ExtractExplicitFieldsFromTopicBody(content);
if (isNew)
{
foreach (string pName in newProperties.Keys)
gen.RecordPropertyChange(absTopic, pName, FederationUpdate.PropertyChangeType.PropertyAdd);
gen.RecordPropertyChange(absTopic, "_Body", FederationUpdate.PropertyChangeType.PropertyAdd);
gen.RecordPropertyChange(absTopic, "_TopicName", FederationUpdate.PropertyChangeType.PropertyAdd);
gen.RecordPropertyChange(absTopic, "_TopicFullName", FederationUpdate.PropertyChangeType.PropertyAdd);
gen.RecordPropertyChange(absTopic, "_LastModifiedBy", FederationUpdate.PropertyChangeType.PropertyAdd);
gen.RecordPropertyChange(absTopic, "_CreationTime", FederationUpdate.PropertyChangeType.PropertyAdd);
gen.RecordPropertyChange(absTopic, "_ModificationTime", FederationUpdate.PropertyChangeType.PropertyAdd);
}
else
{
if (content != oldText)
{
FillFederationUpdateByComparingPropertyHashes(gen, absTopic, oldProperties, newProperties);
gen.RecordPropertyChange(absTopic, "_Body", FederationUpdate.PropertyChangeType.PropertyUpdate);
}
gen.RecordPropertyChange(absTopic, "_ModificationTime", FederationUpdate.PropertyChangeType.PropertyUpdate);
}
}
finally
{
gen.Pop();
}
}
private void RecordTopicChanges(LocalTopicName topic, FederationUpdateGenerator gen, bool isNew, string content, string oldText, Hashtable oldProperties)
{
try
{
AbsoluteTopicName absTopic = topic.AsAbsoluteTopicName(Namespace);
gen.Push();
// Record the topic-level change
if (isNew)
gen.RecordCreatedTopic(absTopic);
else
gen.RecordUpdatedTopic(absTopic);
// Now process the properties
Hashtable newProperties = ExtractExplicitFieldsFromTopicBody(content);
if (isNew)
{
foreach (string pName in newProperties.Keys)
gen.RecordPropertyChange(absTopic, pName, FederationUpdate.PropertyChangeType.PropertyAdd);
gen.RecordPropertyChange(absTopic, "_Body", FederationUpdate.PropertyChangeType.PropertyAdd);
gen.RecordPropertyChange(absTopic, "_TopicName", FederationUpdate.PropertyChangeType.PropertyAdd);
gen.RecordPropertyChange(absTopic, "_TopicFullName", FederationUpdate.PropertyChangeType.PropertyAdd);
gen.RecordPropertyChange(absTopic, "_LastModifiedBy", FederationUpdate.PropertyChangeType.PropertyAdd);
gen.RecordPropertyChange(absTopic, "_CreationTime", FederationUpdate.PropertyChangeType.PropertyAdd);
gen.RecordPropertyChange(absTopic, "_ModificationTime", FederationUpdate.PropertyChangeType.PropertyAdd);
}
else
{
if (content != oldText)
{
FillFederationUpdateByComparingPropertyHashes(gen, absTopic, oldProperties, newProperties);
gen.RecordPropertyChange(absTopic, "_Body", FederationUpdate.PropertyChangeType.PropertyUpdate);
}
gen.RecordPropertyChange(absTopic, "_ModificationTime", FederationUpdate.PropertyChangeType.PropertyUpdate);
}
}
finally
{
gen.Pop();
}
}
