public override object Execute(Expression expression)
{
// reduce expressions to constants where possible
expression = Evaluator.PartialEval(expression);
var crawler = new ExpressionCrawler();
var searchExpression = crawler.FindSearchLambda(expression);
var fetchExpression = crawler.FindFetchLamda(expression);
// the search string sequence
string sequence;
var searchTranslationResult = new ImapQueryTranslator().Translate(searchExpression);
var isSearchRequired = searchTranslationResult.ValidateSearchNecessity();
if (isSearchRequired)
{
var searchCommand = new ImapCommand(searchTranslationResult.SearchCommand);
var response = _client.SendAndReceive(searchCommand);
var success = TryExtractIds(response, out sequence);
if (!success)
{
// no messages match the search criteria therefor we don't need to fetch anything
// we return an empty list
return(Activator.CreateInstance(typeof(List <>).MakeGenericType(fetchExpression.ReturnType), null));
}
}
else
{
sequence = searchTranslationResult.ConvertCommandToSequence();
}
// There are no id's if no message matches the search criterias.
var fetchTranslator = new ImapFetchQueryTranslator {
IsUid = searchTranslationResult.IsUid, UsePeek = _client.UsePeek
};
ResponseProcessor processor;
var fetchString = fetchTranslator.Translate(fetchExpression, sequence, out processor);
var fetchCommand = new ImapCommand(fetchString);
var fetchResponse = _client.SendAndReceive(fetchCommand);
return(Activator.CreateInstance(
typeof(ImapQueryResponseReader <>).MakeGenericType(new[] { fetchExpression.ReturnType }),
BindingFlags.Instance | BindingFlags.Public,
null,
new object[] { fetchResponse, processor },
CultureInfo.CurrentCulture));
}
public void TranslateFetchRecursiveBodyPartsTest()
{
using (var client = new ImapClient()) {
var query = client.Messages.Where(x => x.SequenceNumber == 1).Select(x => new SampleContainer {MyText = (string) x.Parts("1.Text"), MyPart = (string) x.Parts("1.2")});
ResponseProcessor projector;
var translator = new ImapFetchQueryTranslator();
var expression = new ExpressionCrawler().FindFetchLamda(query.Expression);
var actual = translator.Translate(expression, "1:10", out projector);
const string expected = "FETCH 1:10 (BODY[1.TEXT] BODY[1.2])";
Assert.AreEqual(expected, actual);
}
}
public override object Execute(Expression expression)
{
// reduce expressions to constants where possible
expression = Evaluator.PartialEval(expression);
var crawler = new ExpressionCrawler();
var searchExpression = crawler.FindSearchLambda(expression);
var fetchExpression = crawler.FindFetchLamda(expression);
// the search string sequence
string sequence;
var searchTranslationResult = new ImapQueryTranslator().Translate(searchExpression);
var isSearchRequired = searchTranslationResult.ValidateSearchNecessity();
if (isSearchRequired) {
var searchCommand = new ImapCommand(searchTranslationResult.SearchCommand);
var response = _client.SendAndReceive(searchCommand);
var success = TryExtractIds(response, out sequence);
if (!success) {
// no messages match the search criteria therefor we don't need to fetch anything
// we return an empty list
return Activator.CreateInstance(typeof (List<>).MakeGenericType(fetchExpression.ReturnType), null);
}
} else {
sequence = searchTranslationResult.ConvertCommandToSequence();
}
// There are no id's if no message matches the search criterias.
var fetchTranslator = new ImapFetchQueryTranslator {IsUid = searchTranslationResult.IsUid, UsePeek = _client.UsePeek};
ResponseProcessor processor;
var fetchString = fetchTranslator.Translate(fetchExpression, sequence, out processor);
var fetchCommand = new ImapCommand(fetchString);
var fetchResponse = _client.SendAndReceive(fetchCommand);
return Activator.CreateInstance(
typeof (ImapQueryResponseReader<>).MakeGenericType(new[] {fetchExpression.ReturnType}),
BindingFlags.Instance | BindingFlags.Public,
null,
new object[] {fetchResponse, processor},
CultureInfo.CurrentCulture);
}
public void TranslateFetchSelectTest()
{
using (var client = new ImapClient()) {
var query = client.Messages.Where(x => x.SequenceNumber == 1).Select(x => new SampleContainer {MySubject = x.Subject});
ResponseProcessor projector;
var translator = new ImapFetchQueryTranslator();
var expression = new ExpressionCrawler().FindFetchLamda(query.Expression);
var actual = translator.Translate(expression, "1:10", out projector);
const string expected = "FETCH 1:10 (BODY[HEADER.FIELDS (Subject)])";
Assert.AreEqual(expected, actual);
}
}