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 TranslateFromAndToQuery()
{
using (var client = new ImapClient()) {
var translator = new ImapQueryTranslator();
var expression = client.Messages.Where(x => x.From.Contains("Foo") && x.To.Contains("Bar")).Expression;
const string expected = "SEARCH FROM \"Foo\" TO \"Bar\"";
var result = translator.Translate(expression);
Assert.IsFalse(result.IsUid);
Assert.AreEqual(expected, result.SearchCommand);
}
}
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 TranslateHasHeaderField()
{
ImapQueryTranslator target;
Expression expression;
using (var client = new ImapClient()) {
target = new ImapQueryTranslator();
expression = client.Messages.Where(x => x.Headers.Any(y => y.Name.Contains("Foo") && y.Value.Contains("Bar"))).Expression;
}
const string expected = "SEARCH HEADER \"Foo\" \"Bar\"";
var result = target.Translate(expression);
Assert.AreEqual(expected, result.SearchCommand);
}
public void TranslateTestSearchUnseenTextKeyword()
{
ImapQueryTranslator target;
Expression expression;
using (var client = new ImapClient()) {
target = new ImapQueryTranslator();
expression = client.Messages.Where(x => !x.Flags.HasFlag(MessageFlags.Seen)
&& x.Text.Contains("Peter File")
&& x.Keywords.Contains("Cheers")
&& !x.Keywords.Contains("Cheerio")).Expression;
}
const string expected = "SEARCH NOT SEEN TEXT \"Peter File\" KEYWORD Cheers NOT KEYWORD Cheerio";
var result = target.Translate(expression);
Assert.IsFalse(result.IsUid);
Assert.AreEqual(expected, result.SearchCommand);
}
public void TranslateTestSearchUnseen()
{
ImapQueryTranslator target;
Expression expression;
using (var client = new ImapClient()) {
target = new ImapQueryTranslator();
expression = client.Messages.Where(x => !x.Flags.HasFlag(MessageFlags.Seen)).Expression;
}
const string expected = "SEARCH NOT SEEN";
var result = target.Translate(expression);
Assert.IsFalse(result.IsUid);
Assert.AreEqual(expected, result.SearchCommand);
}
public void TranslateTestSearchSeenOperator()
{
try {
using (var client = new ImapClient()) {
var target = new ImapQueryTranslator();
var expression = client.Messages.Where(x => x.Flags == MessageFlags.Seen).Expression;
target.Translate(expression);
}
Assert.Fail();
}
catch (NotSupportedException) {
Assert.IsTrue(true);
}
}
public void TranslateTestSearchIsOldAndNotIsNew()
{
ImapQueryTranslator target;
Expression expression;
using (var client = new ImapClient()) {
target = new ImapQueryTranslator();
expression = client.Messages.Where(x => x.IsNew && !x.IsOld).Expression;
}
const string expected = "SEARCH (RECENT UNSEEN) NOT NOT RECENT";
var result = target.Translate(expression);
Assert.IsFalse(result.IsUid);
Assert.AreEqual(expected, result.SearchCommand);
}
public void TranslateTestSearchDateSinceSeenOrAnswered()
{
ImapQueryTranslator target;
Expression expression;
using (var client = new ImapClient()) {
var date = DateTime.Parse("1-Feb-1994");
target = new ImapQueryTranslator();
expression = client.Messages.Where(x => x.Date < date && (x.Flags.HasFlag(MessageFlags.Seen) || x.Flags.HasFlag(MessageFlags.Answered))).Expression;
// we need to evaluate the field date into a constant.
expression = Evaluator.PartialEval(expression);
}
const string expected = "SEARCH SENTBEFORE 1-Feb-1994 OR SEEN ANSWERED";
var result = target.Translate(expression);
Assert.IsFalse(result.IsUid);
Assert.AreEqual(expected, result.SearchCommand);
}
public void TranslateSingleUidQuery()
{
using (var client = new ImapClient()) {
var translator = new ImapQueryTranslator();
var expression = client.Messages.Where(x => x.Uid == 5).Expression;
const string expected = "UID SEARCH UID 5";
var result = translator.Translate(expression);
Assert.IsTrue(result.IsUid);
Assert.AreEqual(expected, result.SearchCommand);
}
}
public void TranslateSingleSequenceNumberQuery()
{
using (var client = new ImapClient()) {
var translator = new ImapQueryTranslator();
var expression = client.Messages.Where(x => x.SequenceNumber == 5).Expression;
const string expected = "SEARCH 5";
var result = translator.Translate(expression);
Assert.IsFalse(result.IsUid);
Assert.AreEqual(expected, result.SearchCommand);
}
}
public void TranslateSeperatedUidQueriesOpenEnd()
{
ImapQueryTranslator target;
Expression expression;
using (var client = new ImapClient()) {
target = new ImapQueryTranslator();
expression = client.Messages.Where(x => x.Uid >= 1).Expression;
}
const string expected = "UID SEARCH UID 1:*";
var resuult = target.Translate(expression);
Assert.AreEqual(expected, resuult.SearchCommand);
}
public void TranslateNegativeOperatorSeenFlags()
{
using (var client = new ImapClient()) {
var translator = new ImapQueryTranslator();
var expression = client.Messages.Where(x => x.Flags == MessageFlags.Seen).Expression;
SearchTranslationResult result = null;
try {
result = translator.Translate(expression);
Assert.Fail("This call must throw a NotSupportedException.");
}
catch (NotSupportedException) {
Assert.IsTrue(true);
if (result != null) {
Assert.IsFalse(result.IsUid);
}
}
}
}
