/// <summary> This provides an opportunity for the viewer to perform any pre-display work
/// which is necessary before entering any of the rendering portions </summary>
/// <param name="Tracer"> Trace object keeps a list of each method executed and important milestones in rendering </param>
/// <remarks> This method his class pulls any full-text search results for this single item from the Solr/Lucene engine </remarks>
public override void Perform_PreDisplay_Work(Custom_Tracer Tracer)
{
if (CurrentMode.Text_Search.Length > 0)
{
List<string> terms = new List<string>();
List<string> web_fields = new List<string>();
// Split the terms correctly
SobekCM_Assistant.Split_Clean_Search_Terms_Fields(CurrentMode.Text_Search, "ZZ", Search_Type_Enum.Basic, terms, web_fields, null, Search_Precision_Type_Enum.Contains, '|');
Tracer.Add_Trace("Text_Search_Item_Viewer.Perform_PreDisplay_Work", "Performing Solr/Lucene search");
results = Solr_Page_Results.Search(CurrentItem.BibID, CurrentItem.VID, terms, 20, CurrentMode.SubPage, false);
Tracer.Add_Trace("Text_Search_Item_Viewer.Perform_PreDisplay_Work", "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 Solr_Page_Results Search(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;
// Create the solr worker to query the page index
var solrWorker = Solr_Operations_Cache<Solr_Page_Result>.GetSolrOperations( SobekCM_Library_Settings.Page_Solr_Index_URL);
// 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" }, },
ExtraParams = new Dictionary<string, string> { { "hl.useFastVectorHighlighter", "true" } }
};
// 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
ISolrQueryResults<Solr_Page_Result> results = solrWorker.Query(queryStringBuilder.ToString(), options);
// Create the results object to pass back out
var searchResults = new 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 (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;
}
/// <summary> Stores the item-level search results string </summary>
/// <param name="BibID"> Bibliographic Identifier for the digital resource against which the search was conducted </param>
/// <param name="VID"> Volume Identifier for the digital resourceagainst which the search was conducted </param>
/// <param name="StoreObject"> Item-level search results strings </param>
/// <param name="Tracer"> Trace object keeps a list of each method executed and important milestones in rendering</param>
public static void Store_Item_Search_Results(string BibID, string VID, Solr_Page_Results StoreObject, Custom_Tracer Tracer)
{
// If the cache is disabled, just return before even tracing
if (Disabled)
return;
// Determine the key
string key = "ITEMSEARCH_" + BibID + "_" + VID + "_" + StoreObject.Query.ToLower() + "_" + StoreObject.Page_Number;
if (StoreObject.Sort_By_Score)
key = key + "_SCORE";
if (Tracer != null)
{
Tracer.Add_Trace("Cached_Data_Manager.Store_Item_Search_Results", "Adding object '" + key + "' to the cache with expiration of 5 minutes");
}
// Store this on the cache
if (HttpContext.Current.Cache[key] == null)
{
HttpContext.Current.Cache.Insert(key, StoreObject, null, Cache.NoAbsoluteExpiration, TimeSpan.FromMinutes(5));
}
}
/// <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 Solr_Page_Results Search(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;
}
// Create the solr worker to query the page index
var solrWorker = Solr_Operations_Cache <Solr_Page_Result> .GetSolrOperations(SobekCM_Library_Settings.Page_Solr_Index_URL);
// 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" },
},
ExtraParams = new Dictionary <string, string> {
{ "hl.useFastVectorHighlighter", "true" }
}
};
// 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
ISolrQueryResults <Solr_Page_Result> results = solrWorker.Query(queryStringBuilder.ToString(), options);
// Create the results object to pass back out
var searchResults = new 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 (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);
}
}
