public SuggestionsList Suggest(string query)
{
AuditServiceItem auditServiceItem = AuditService.Register("SuggestionsService", "Suggest", query);
AuditService.Start(auditServiceItem);
SuggestionsList suggestionsList = SuggestionsCacheHelper.ReadSuggestionsList(query);
if (suggestionsList == null)
{
try
{
IProviderSuggestionsService googleSuggestionsService = new GoogleSuggestionsService();
SuggestionsContext googleSuggestionsContext = new SuggestionsContext(ProviderEnum.Google, query);
suggestionsList = googleSuggestionsService.GetSuggestions(googleSuggestionsContext);
SuggestionsCacheHelper.CacheSuggestionList(query, suggestionsList);
}
catch (Exception exception)
{
ErrorService.Log("SuggestionsService", "Suggest", query, exception);
}
}
AuditService.End(auditServiceItem);
return suggestionsList;
}
public SuggestionsList GetSuggestions(SuggestionsContext suggestionsContext)
{
SuggestionsList suggestionsList = new SuggestionsList();
try
{
string query = suggestionsContext.Query;
string urlTemplate = "http://google.com/complete/search?output=toolbar&q={0}";
string url = string.Format(urlTemplate, query);
XmlDocument xmlDocument = new XMLConnector().GetXMLDocument(url); ;
XmlNodeList resultNodes = xmlDocument.SelectNodes("toplevel/CompleteSuggestion");
if (resultNodes != null)
{
foreach (XmlNode resultNode in resultNodes)
{
string name = null;
double numberQueries = 0;
XmlNode suggestionNode = resultNode.SelectSingleNode("suggestion");
if (suggestionNode != null)
{
XmlAttribute dataAttribute = suggestionNode.Attributes["data"];
if (dataAttribute != null)
{
name = dataAttribute.Value;
}
}
XmlNode numQueriesNode = resultNode.SelectSingleNode("num_queries");
if (numQueriesNode != null)
{
XmlAttribute intAttribute = numQueriesNode.Attributes["int"];
if (intAttribute != null)
{
string numQuery = intAttribute.Value;
try {
numberQueries = double.Parse(numQuery);
} catch (Exception) {}
}
}
if (name != null && numberQueries > 0)
{
SuggestionItem suggestionItem = new SuggestionItem(name);
suggestionItem.Provider = ProviderEnum.Google;
suggestionItem.NumberQueries = numberQueries;
suggestionItem.Weight = CalculateWeight(numberQueries);
suggestionsList.Add(suggestionItem);
}
}
}
}
catch (Exception exception)
{
ErrorService.Log("GoogleSuggestionsService", "GetSuggestions", suggestionsContext.ToString(), exception);
}
return suggestionsList;
}