public static void EnsureAllRfpFileExists()
{
string fileName = IOHelper.GetAllRfpsFileName();
if (!File.Exists(fileName))
{
XElement root = new XElement("requestForProposals");
root.Save(fileName);
}
}
// retrieve a Request for Proposal from the repository by Id
public static RequestForProposal Retrieve(Guid id)
{
// load the document
XElement doc = XElement.Load(IOHelper.GetAllRfpsFileName());
// erase nodes for the current rfp
IEnumerable <RequestForProposal> current =
from r in doc.Elements("requestForProposal")
where r.Attribute("id").Value.Equals(id.ToString())
select MapFrom(r);
return(current.First <RequestForProposal>());
}
// retrieve all finished Requests for Proposals
public static IEnumerable <RequestForProposal> RetrieveFinished()
{
// if no persistence file, exit
if (!File.Exists(IOHelper.GetAllRfpsFileName()))
{
return(new List <RequestForProposal>());
}
// load the document
XElement doc = XElement.Load(IOHelper.GetAllRfpsFileName());
// fetch active rfps
return
(from rfp in doc.Descendants("requestForProposal")
where (rfp.Attribute("status").Value.Equals("finished"))
select MapFrom(rfp));
}
//Implementations of MapValues are given all the values collected from all participants’ implementations of CollectValues
protected override IDictionary <XName, object> MapValues(IDictionary <XName, object> readWriteValues, IDictionary <XName, object> writeOnlyValues)
{
XName statusXname = XName.Get("Status", propertiesNamespace);
IDictionary <XName, object> mappedValues = base.MapValues(readWriteValues, writeOnlyValues);
RequestForProposal requestForProposal = null;
string status = string.Empty;
object value = null;
//retrieve the status of the workflow
if (writeOnlyValues.TryGetValue(statusXname, out value))
{
status = (string)value;
}
//retrieve the RequestForProposal object
foreach (KeyValuePair <System.Xml.Linq.XName, object> item in writeOnlyValues)
{
if (item.Value is LocationInfo)
{
LocationInfo li = (LocationInfo)item.Value;
if (li.Value is RequestForProposal)
{
requestForProposal = (RequestForProposal)li.Value;
}
}
}
IOHelper.EnsureAllRfpFileExists();
// load the document
XElement doc = XElement.Load(IOHelper.GetAllRfpsFileName());
IEnumerable <XElement> current =
from r in doc.Elements("requestForProposal")
where r.Attribute("id").Value.Equals(Id.ToString())
select r;
if (status == "Closed")
{
// erase nodes for the current rfp
foreach (XElement xe in current)
{
xe.Attribute("status").Value = "finished";
}
}
else
{
// erase nodes for the current rfp
foreach (XElement xe in current)
{
xe.Remove();
}
// get the Xml version of the Rfp, add it to the document and save it
if (requestForProposal != null)
{
XElement e = SerializeRfp(requestForProposal, Id);
doc.Add(e);
}
}
doc.Save(IOHelper.GetAllRfpsFileName());
return(mappedValues);
}
