private IEnumerable <IMessage> GetFilteredMessages(MessageFilteringParams messageFilteringParams)
{
var filteredByUser = FilteredByUser(messageFilteringParams);
var filteredByText = FilteredByText(messageFilteringParams);
var filteredByDate = FilteredByDate(messageFilteringParams);
if (messageFilteringParams.UsersSortOptions == SortOptions.AND)
{
filteredByUser = filteredByUser.Intersect(filteredByText, new MessageComparer());
}
else if (messageFilteringParams.UsersSortOptions == SortOptions.OR)
{
filteredByUser = filteredByUser.Union(filteredByText, new MessageComparer());
}
if (messageFilteringParams.MessageTextSortOptions == SortOptions.AND)
{
filteredByUser = filteredByUser.Intersect(filteredByDate, new MessageComparer());
}
else if (messageFilteringParams.MessageTextSortOptions == SortOptions.OR)
{
filteredByUser = filteredByUser.Union(filteredByDate, new MessageComparer());
}
return(filteredByUser);
}
private IEnumerable <IMessage> FilteredByDate(MessageFilteringParams messageFilteringParams)
{
var filteredMessages = from i in Messages
where i.ReceivingTime <messageFilteringParams.BeforeDate &&
i.ReceivingTime> messageFilteringParams.FromDate
select i;
return(filteredMessages);
}
private IEnumerable <IMessage> FilteredByText(MessageFilteringParams messageFilteringParams)
{
if (string.IsNullOrEmpty(messageFilteringParams.MessageText))
{
return(Messages);
}
var filteredMessages = from i in Messages
where i.Text.Contains(messageFilteringParams.MessageText)
select i;
return(filteredMessages);
}
private IEnumerable <IMessage> FilteredByUser(MessageFilteringParams messageFilteringParams)
{
if (string.IsNullOrEmpty(messageFilteringParams.SelectedUser))
{
return(Messages);
}
var filteredMessages = from i in Messages
where i.User == messageFilteringParams.SelectedUser
select i;
return(filteredMessages);
}
public IEnumerable <IMessage> GetMessages(MessageFilteringParams messageFilteringParams)
{
var filteredMessages = GetFilteredMessages(messageFilteringParams);
var filteredMessagesForFormatting = from m in filteredMessages
select new Message()
{
User = m.User,
Text = m.Text,
ReceivingTime = m.ReceivingTime
};
return(Format(filteredMessagesForFormatting, messageFilteringParams).ToList());
}
private static IEnumerable <IMessage> Format(IEnumerable <IMessage> messages, MessageFilteringParams messageFilteringParams)
{
var formatedMessages = from m in messages
select FormatMethods.GetFormatMethod(messageFilteringParams.FormattingOptions).Invoke(m);
return(formatedMessages);
}