private static string CreateQueryStringUrlTemplate(string functionId, XmlNamespaceSearchCriterionSet xmlCriterionSet, HttpContext httpContext, IOpenSearchContext openSearchContext)
{
UriBuilder uriTemplate = new UriBuilder(openSearchContext.BaseSearchUrlTemplate.ToString().Replace("{functionId}", functionId));
uriTemplate.Query = xmlCriterionSet.ToQueryStringUrlTemplate();
return(uriTemplate.ToString());
}
public static OpenSearchDescription GenerateOpenSearchDescription(ISearchEngine searchEngine, HttpContext httpContext, IOpenSearchContext openSearchContext)
{
OpenSearchDescription openSearchDescription = new OpenSearchDescription();
openSearchDescription.Url = OpenSearchHelpers.CreateOpenSearchDescriptionUrls(searchEngine.GetSearchFunctions(), httpContext, openSearchContext).ToList();
return(openSearchDescription);
}
/// <summary>
/// This function creates a list of opensearch Url with templates from a list
/// of search functions based on the formatting capabities of the httpContext
/// </summary>
/// <param name="searchFunctions">list of search functions to make an opensearch Url template from</param>
/// <param name="httpContext">the HTTP context</param>
/// <returns></returns>
public static IEnumerable <OpenSearchDescriptionUrl> CreateOpenSearchDescriptionUrls(IDictionary <string, ISearchFunction> searchFunctions, HttpContext httpContext, IOpenSearchContext openSearchContext)
{
// prepare an empty url list
List <OpenSearchDescriptionUrl> urls = new List <OpenSearchDescriptionUrl>();
// get the OpenSearch Formatter selector
OpenSearchFormatterSelector selector = (OpenSearchFormatterSelector)httpContext.RequestServices.GetService(typeof(OpenSearchFormatterSelector));
// urls are the combination of the search function possible results type and the relevant formatters
foreach (var searchFunction in searchFunctions)
{
foreach (var formatter in selector.SelectFormatters(searchFunction.Value.ResultType))
{
// if the formatter is able to serialize the result, then there is a possible url template
var supportedContentTypes = formatter.GetSupportedContentTypes(null, searchFunction.Value.ResultType);
if (supportedContentTypes == null || supportedContentTypes.Count == 0)
{
continue;
}
var xmlCriterionSet = QualifyCriterionSetForOpenSearch(searchFunction.Value.SearchCriterionSet);
OpenSearchDescriptionUrl url = new OpenSearchDescriptionUrl(
supportedContentTypes.First(),
CreateQueryStringUrlTemplate(searchFunction.Key, xmlCriterionSet, httpContext, openSearchContext),
"results",
xmlCriterionSet.GetExtraNamespacesIfAny()
);
urls.Add(url);
}
}
return(urls);
}
