/// <summary> Constructor for a new instance of the Text_Search_ItemViewer class, which allows the full text of an
/// individual resource to be searched and individual matching pages are displayed with page thumbnails </summary>
/// <param name="BriefItem"> Digital resource object </param>
/// <param name="CurrentUser"> Current user, who may or may not be logged on </param>
/// <param name="CurrentRequest"> Information about the current request </param>
/// <param name="Tracer"> Trace object keeps a list of each method executed and important milestones in rendering </param>
public Text_Search_ItemViewer(BriefItemInfo BriefItem, User_Object CurrentUser, Navigation_Object CurrentRequest, Custom_Tracer Tracer)
{
Tracer.Add_Trace("Text_Search_ItemViewer.Constructor");
// Save the arguments for use later
this.BriefItem = BriefItem;
this.CurrentUser = CurrentUser;
this.CurrentRequest = CurrentRequest;
// Set the behavior properties to the empy behaviors ( in the base class )
Behaviors = EmptyBehaviors;
if (!String.IsNullOrWhiteSpace(CurrentRequest.Text_Search))
{
List <string> terms = new List <string>();
List <string> web_fields = new List <string>();
// Split the terms correctly
SobekCM_Assistant.Split_Clean_Search_Terms_Fields(CurrentRequest.Text_Search, "ZZ", Search_Type_Enum.Basic, terms, web_fields, null, Search_Precision_Type_Enum.Contains, '|');
Tracer.Add_Trace("Text_Search_ItemViewer.Constructor", "Performing Solr/Lucene search");
int page = CurrentRequest.SubPage.HasValue ? Math.Max(CurrentRequest.SubPage.Value, ((ushort)1)) : 1;
// Search differently, depending on the search type
if (UI_ApplicationCache_Gateway.Settings.System.Search_System == Search_System_Enum.Beta)
{
results = v5_Solr_Searcher.Search_Within_Document(BriefItem.BibID, BriefItem.VID, terms, 20, page, false);
}
else
{
results = Legacy_Solr_Searcher.Search_Within_Document(BriefItem.BibID, BriefItem.VID, terms, 20, page, false);
}
Tracer.Add_Trace("Text_Search_ItemViewer.Constructor", "Completed Solr/Lucene search in " + results.QueryTime + "ms");
}
}
/// <summary> Perform an in-document search for pages with matching full-text </summary>
/// <param name="BibID"> Bibliographic identifier (BibID) for the item to search </param>
/// <param name="VID"> Volume identifier for the item to search </param>
/// <param name="Search_Terms"> Terms to search for within the page text </param>
/// <param name="ResultsPerPage"> Number of results to display per a "page" of results </param>
/// <param name="ResultsPage"> Which page of results to return ( one-based, so the first page is page number of one )</param>
/// <param name="Sort_By_Score"> Flag indicates whether to sort the results by relevancy score, rather than the default page order </param>
/// <returns> Page search result object with all relevant result information </returns>
public static Legacy_Solr_Page_Results Search_Within_Document(string BibID, string VID, List <string> Search_Terms, int ResultsPerPage, int ResultsPage, bool Sort_By_Score)
{
// Ensure page is not erroneously set to zero or negative
if (ResultsPage <= 0)
{
ResultsPage = 1;
}
// Get and clean the solr document url
string solrPageUrl = Engine_ApplicationCache_Gateway.Settings.Servers.Page_Solr_Index_URL;
if ((!String.IsNullOrEmpty(solrPageUrl)) && (solrPageUrl[solrPageUrl.Length - 1] == '/'))
{
solrPageUrl = solrPageUrl.Substring(0, solrPageUrl.Length - 1);
}
// Create the solr worker to query the page index
var solrWorker = Solr_Operations_Cache <Legacy_Solr_Page_Result> .GetSolrOperations(solrPageUrl);
// Create the query options
QueryOptions options = new QueryOptions
{
Rows = ResultsPerPage,
Start = (ResultsPage - 1) * ResultsPerPage,
Fields = new[] { "pageid", "pagename", "pageorder", "score", "thumbnail" },
Highlight = new HighlightingParameters {
Fields = new[] { "pagetext" }, Fragsize = 1000
},
ExtraParams = new Dictionary <string, string> {
{ "hl.useFastVectorHighlighter", "true" }, { "wt", "xml" }
}
};
// If this is not the default Solr sort (by score) request sort by the page order
if (!Sort_By_Score)
{
options.OrderBy = new[] { new SortOrder("pageorder", Order.ASC) }
}
;
// Build the query string
StringBuilder queryStringBuilder = new StringBuilder("(bibid:" + BibID + ")AND(vid:" + VID + ")AND(");
bool first_value = true;
foreach (string searchTerm in Search_Terms)
{
if (searchTerm.Length > 1)
{
// Skip any AND NOT for now
if (searchTerm[0] != '-')
{
// Find the joiner
if (first_value)
{
if (searchTerm.IndexOf(" ") > 0)
{
if ((searchTerm[0] == '+') || (searchTerm[0] == '=') || (searchTerm[0] == '-'))
{
queryStringBuilder.Append("(pagetext:\"" + searchTerm.Substring(1).Replace(":", "") + "\")");
}
else
{
queryStringBuilder.Append("(pagetext:\"" + searchTerm.Replace(":", "") + "\")");
}
}
else
{
if ((searchTerm[0] == '+') || (searchTerm[0] == '=') || (searchTerm[0] == '-'))
{
queryStringBuilder.Append("(pagetext:" + searchTerm.Substring(1).Replace(":", "") + ")");
}
else
{
queryStringBuilder.Append("(pagetext:" + searchTerm.Replace(":", "") + ")");
}
}
first_value = false;
}
else
{
if ((searchTerm[0] == '+') || (searchTerm[0] == '=') || (searchTerm[0] == '-'))
{
queryStringBuilder.Append(searchTerm[0] == '=' ? " OR " : " AND ");
if (searchTerm.IndexOf(" ") > 0)
{
queryStringBuilder.Append("(pagetext:\"" + searchTerm.Substring(1).Replace(":", "") + "\")");
}
else
{
queryStringBuilder.Append("(pagetext:" + searchTerm.Substring(1).Replace(":", "") + ")");
}
}
else
{
if (searchTerm.IndexOf(" ") > 0)
{
queryStringBuilder.Append(" AND (pagetext:\"" + searchTerm.Replace(":", "") + "\")");
}
else
{
queryStringBuilder.Append(" AND (pagetext:" + searchTerm.Replace(":", "") + ")");
}
}
}
}
}
}
queryStringBuilder.Append(")");
// Perform this search
SolrQueryResults <Legacy_Solr_Page_Result> results = solrWorker.Query(queryStringBuilder.ToString(), options);
// Create the results object to pass back out
var searchResults = new Legacy_Solr_Page_Results
{
QueryTime = results.Header.QTime,
TotalResults = results.NumFound,
Query = queryStringBuilder.ToString(),
Sort_By_Score = Sort_By_Score,
Page_Number = ResultsPage
};
// Pass all the results into the List and add the highlighted text to each result as well
foreach (Legacy_Solr_Page_Result thisResult in results)
{
// Add the highlight snipper
if ((results.Highlights.ContainsKey(thisResult.PageID)) && (results.Highlights[thisResult.PageID].Count > 0) && (results.Highlights[thisResult.PageID].ElementAt(0).Value.Count > 0))
{
thisResult.Snippet = results.Highlights[thisResult.PageID].ElementAt(0).Value.ElementAt(0);
}
// Add this results
searchResults.Add_Result(thisResult);
}
return(searchResults);
}
#endregion
}
