/// <summary>
/// Converts object array containing data from Content Repository to string list.
/// </summary>
/// <param name="handlerValues">String array with a single string containing average rating and numbers of rating separated by pipe character.</param>
/// <returns>String list containing average rating and numbers of ratings</returns>
protected override object ConvertTo(object[] handlerValues)
{
var fs = FieldSetting as RatingFieldSetting;
if (fs == null)
{
throw new NotSupportedException("Invalid field setting.");
}
var items = handlerValues[0] as string;
VoteData data = string.IsNullOrEmpty(items)
? VoteData.CreateVoteData(fs.Range, fs.Split)
: VoteData.CreateVoteData(items);
return(data);
}
/// <summary>
/// Converts string list to object array to store data in Content Repository.
/// </summary>
/// <param name="value">String list containing average rating and numbers of ratings</param>
/// <returns>String array with a single string containing average rating and numbers of rating separated by pipe character.</returns>
protected override object[] ConvertFrom(object value)
{
var fs = FieldSetting as RatingFieldSetting;
if (fs == null)
{
throw new NotSupportedException("Invalid field setting.");
}
if (fs.Range <= 0)
{
throw new NotSupportedException("Range is invalid, must be greater than 0.");
}
var voteData = value as VoteData;
if (voteData == null)
{
throw new InvalidCastException("Unable to cast the given value to VoteData.");
}
var originalValueData = OriginalValue as VoteData;
if (originalValueData == null)
{
throw new NotSupportedException("Invalid items in the field.");
}
//If there was no stored rating or it is invalid, reset votes
if ((originalValueData.MaxVotes != fs.Range * fs.Split || originalValueData.Split != fs.Split) || voteData.SelectedValue == -1)
{
originalValueData = VoteData.CreateVoteData(fs.Range, fs.Split);
}
//Adding vote if present
if (voteData.SelectedValue.HasValue && voteData.SelectedValue.Value > 0)
{
if (voteData.OldValue.HasValue && voteData.OldValue.Value > 0)
{
originalValueData.RemoveVote(voteData.OldValue.Value);
}
originalValueData.AddVote(voteData.SelectedValue.Value);
}
return(new object[] { originalValueData.Serialize(), originalValueData.SumVotes, originalValueData.AverageRate });
}
protected override void ImportData(System.Xml.XmlNode fieldNode, ImportContext context)
{
var text = fieldNode.InnerText;
VoteData vd = null;
var fs = FieldSetting as RatingFieldSetting;
if (fs == null)
{
throw new NotSupportedException("Invalid field setting.");
}
if (fs.Range <= 0)
{
throw new NotSupportedException("Range is invalid, must be greater than 0.");
}
vd = string.IsNullOrEmpty(text) ? VoteData.CreateVoteData(fs.Range, fs.Split) : VoteData.CreateVoteData(text);
if (vd.MaxVotes != fs.Range * fs.Split || vd.Split != fs.Split)
{
vd = VoteData.CreateVoteData(fs.Range, fs.Split);
}
this.SetData(vd);
}