public DonateAnywhereResult EvaluateRequest(IDonateAnywhereRequestContext donateAnywhereContext)
{
if(!donateAnywhereContext.EnoughInformationToBuildSuggestions)
{
throw new ArgumentException("Not enough information on the current context is available to generate suggestions.", "donateAnywhereContext");
}
var keywords = CalculateKeywordsForSearchCriteria(donateAnywhereContext);
SearchResults searchResults;
SearchResults relatedResults;
using (new DebugTimer("Calling search API for " + donateAnywhereContext.UriToAnalyse))
{
searchResults = _searchProvider.Search(keywords.ToListOfStrings()
.Take(KEYWORD_CAP_FOR_SEARCH_REQUEST))
.Take(SEARCH_RESULT_CAP)
.BoostResultsWhichContainExactKeyword(keywords)
.RemoveResultsThatDontMention(keywords);
relatedResults = _searchProvider.Search(keywords.ToListOfStrings())
.RemoveAnyItemsThatAreAlsoIn(searchResults)
.BoostResultsWhichContainExactKeyword(keywords)
.Take(SEARCH_RESULT_CAP);
}
return new DonateAnywhereResult
{
Keywords = keywords,
Results = searchResults.Take(SEARCH_RESULT_CAP),
RelatedResults = relatedResults.Take(SEARCH_RESULT_CAP).ToList(),
RequestContext = donateAnywhereContext
};
}
private static void MapUrlToAnalyse(IDonateAnywhereRequestContext donateAnywhereRequestContext, HttpContextBase httpContextBase)
{
donateAnywhereRequestContext.UriToAnalyse = httpContextBase.Request.UrlReferrer;
if(httpContextBase.Request.QueryString.AllKeys.Contains("UrlContext"))
{
donateAnywhereRequestContext.UriToAnalyse = new Uri(httpContextBase.Request.QueryString["UrlContext"]);
}
}
private Keywords CalculateKeywordsForSearchCriteria(IDonateAnywhereRequestContext donateAnywhereContext)
{
var keywords = new List<string>();
if (donateAnywhereContext.UserSuppliedKeywords.Count > 0)
{
TakeTopTenUserSuggestedKeywords(donateAnywhereContext, keywords);
}
else if (donateAnywhereContext.RequiresFullPageAnalysis)
{
ExtractTopTenKeywordsFromPage(donateAnywhereContext, keywords);
}
return new Keywords(keywords);
}
private void ExtractTopTenKeywordsFromPage(IDonateAnywhereRequestContext donateAnywhereContext, List<string> keywords)
{
var report = _pageAnalyser.Analyse(donateAnywhereContext.UriToAnalyse);
keywords.AddRange(report.KeywordDensity.Keys.Take(KEYWORD_CAP));
}
private static void TakeTopTenUserSuggestedKeywords(IDonateAnywhereRequestContext donateAnywhereContext, List<string> keywords)
{
keywords.AddRange(donateAnywhereContext.UserSuppliedKeywords.Take(KEYWORD_CAP));
}
