/// <summary>
/// Deletes the node with the specified id from the database.
/// </summary>
/// <param name="id">The id of the node to delete</param>
public void DeleteNode(Guid id)
{
// Delete the node from the autocomplete database
using (CassandraDriver autocompleteDriver = new CassandraDriver())
{
autocompleteDriver.DeleteNode(id.ToString());
}
// Delete the node from the graph database
using (NeoDriver graphDriver = new NeoDriver())
{
graphDriver.DeleteNode(id);
}
}
/// <summary>
/// Updates the given node within the database system.
/// </summary>
/// <param name="node">The node to update</param>
public void UpdateNode(BasicNodeModel node)
{
// Update the node in the autocomplete database
using (CassandraDriver autocompleteDriver = new CassandraDriver())
{
autocompleteDriver.UpdateNode(node);
}
// Update the node in the graph database
using (NeoDriver graphDriver = new NeoDriver())
{
graphDriver.UpdateNode(node);
}
}
/// <summary>
/// Adds the given node into the database system.
/// </summary>
/// <param name="node">The node to add to the system</param>
public void AddNode(BasicNodeModel node)
{
// Map the node's information for information marked as "New addition"
MapNewAdditions(ref node);
// Add the node into the autocomplete database
using (CassandraDriver autocompleteDriver = new CassandraDriver())
{
autocompleteDriver.AddNode(node);
}
// Add the node to the graph
using (NeoDriver graphDriver = new NeoDriver())
{
graphDriver.AddNode(node);
}
}
/// <summary>
/// Uses the autocomplete database to map node information to existing information.
/// </summary>
/// <param name="node">The node to map</param>
private void MapNewAdditions(ref BasicNodeModel node)
{
// Get the referenced nodes that are marked as new additions
IEnumerable <RelationshipModel> newAdditions = node.Relationships.Where(x => x.IsNewAddition);
using (CassandraDriver driver = new CassandraDriver())
{
// For each of the new additions
foreach (RelationshipModel m in newAdditions)
{
// Search for an existing record
List <AutocompleteRecord> existingRecords = driver.MappingSearch(m.TargetName, m.TargetType);
// If there is exactly one record,
if (existingRecords.Count == 1)
{
// Update the id to the existing record
m.TargetId = Guid.Parse(existingRecords.First().Id);
}
}
}
}
