public PartialFindResult <Tag> Find(TagQueryParams queryParams, bool onlyMinimalFields)
{
var isMoveToTopQuery = queryParams.Common.MoveExactToTop &&
queryParams.Common.NameMatchMode != NameMatchMode.StartsWith &&
queryParams.Common.NameMatchMode != NameMatchMode.Exact &&
queryParams.Paging.Start == 0 &&
!queryParams.Common.TextQuery.IsEmpty;
if (isMoveToTopQuery)
{
return(GetTagsMoveExactToTop(queryParams));
}
var query = CreateQuery(queryParams, queryParams.Common.Query, queryParams.Common.NameMatchMode);
var orderedAndPaged = query
.OrderBy(queryParams.SortRule, _languagePreference)
.Paged(queryParams.Paging);
Tag[] tags;
if (onlyMinimalFields)
{
tags = orderedAndPaged.Select(t => new Tag
{
Id = t.Id,
CategoryName = t.CategoryName,
CreateDate = t.CreateDate,
Status = t.Status,
Version = t.Version,
Names = new NameManager <TagName>
{
SortNames =
{
English = t.Names.SortNames.English,
Romaji = t.Names.SortNames.Romaji,
Japanese = t.Names.SortNames.Japanese,
DefaultLanguage = t.Names.SortNames.DefaultLanguage
}
}
}).ToArray();
}
else
{
tags = orderedAndPaged.ToArray();
}
var count = 0;
if (queryParams.Paging.GetTotalCount)
{
count = query.Count();
}
return(PartialFindResult.Create(tags, count));
}
private IQueryable <Tag> CreateQuery(TagQueryParams queryParams, string queryText, NameMatchMode nameMatchMode)
{
var textQuery = TagSearchTextQuery.Create(queryText, nameMatchMode);
var query = dbContext.Query()
.WhereIsDeleted(false)
.WhereHasName(textQuery)
.WhereAllowChildren(queryParams.AllowChildren)
.WhereHasCategoryName(queryParams.CategoryName);
return(query);
}
/// <summary>
/// Get tags, searching by exact matches FIRST.
/// This mode does not support paging.
/// </summary>
private PartialFindResult <Tag> GetTagsMoveExactToTop(TagQueryParams queryParams)
{
var sortRule = queryParams.SortRule;
var maxResults = queryParams.Paging.MaxEntries;
var getCount = queryParams.Paging.GetTotalCount;
// Exact query contains the "exact" matches.
// Note: the matched name does not have to be in user's display language, it can be any name.
// The songs are sorted by user's display language though
var exactQ = CreateQuery(queryParams, queryParams.Common.Query, NameMatchMode.StartsWith);
int count;
int[] ids;
var exactResults = exactQ
.OrderBy(sortRule, languagePreference)
.Select(s => s.Id)
.Take(maxResults)
.ToArray();
if (exactResults.Length >= maxResults)
{
ids = exactResults;
count = getCount ? CreateQuery(queryParams, queryParams.Common.Query, queryParams.Common.NameMatchMode).Count() : 0;
}
else
{
var directQ = CreateQuery(queryParams, queryParams.Common.Query, queryParams.Common.NameMatchMode);
var direct = directQ
.OrderBy(sortRule, languagePreference)
.Select(s => s.Id)
.Take(maxResults)
.ToArray();
ids = exactResults
.Concat(direct)
.Distinct()
.Take(maxResults)
.ToArray();
count = getCount ? directQ.Count() : 0;
}
var tags = dbContext
.LoadMultiple <Tag>(ids)
.ToArray()
.OrderByIds(ids);
return(new PartialFindResult <Tag>(tags, count, queryParams.Common.Query));
}
