internal async Task <SearchResultsInfo> ParseAsync(string searchTerms, int maxResults, string languageId, bool haveUser, List <DataProviderFilterInfo> extraFilters = null)
{
using (SearchDataProvider searchDP = new SearchDataProvider()) {
bool haveMore = false;
extraFilters = DataProviderFilterInfo.Join(extraFilters, new DataProviderFilterInfo {
Field = nameof(SearchData.Language), Operator = "==", Value = languageId
});
if (haveUser)
{
extraFilters = DataProviderFilterInfo.Join(extraFilters, new DataProviderFilterInfo {
Field = nameof(SearchData.AllowAnyUser), Operator = "==", Value = true
});
}
else
{
extraFilters = DataProviderFilterInfo.Join(extraFilters, new DataProviderFilterInfo {
Field = nameof(SearchData.AllowAnonymous), Operator = "==", Value = true
});
}
string s = searchTerms;
BuildNodesInfo urls = await BuildNodesAsync(searchDP, s, languageId, haveUser, extraFilters);
List <DataProvider.SearchResult> results = (from u in urls.Data group u by u.SearchDataUrlId into g select new SearchResult {
Count = g.Sum(x => x.Count),
PageUrl = g.Select(m => m.PageUrl).FirstOrDefault(),
DateCreated = g.Select(m => m.DatePageCreated).FirstOrDefault(),
DateUpdated = g.Select(m => m.DatePageUpdated).FirstOrDefault(),
Description = g.Select(m => m.PageTitle).FirstOrDefault(),
PageSummary = g.Select(m => m.PageSummary).FirstOrDefault(),
PageSecurity = g.Select(m => m.PageSecurity).FirstOrDefault(),
CustomData = g.Select(m => m.CustomData).FirstOrDefault(),
}).OrderByDescending(m => m.Count).Take(maxResults + 1).ToList();
haveMore = (results.Count >= maxResults);
return(new Search.DataProvider.SearchResultDataProvider.SearchResultsInfo {
Data = results,
HaveMore = haveMore,
});
}
}
// generate a list of url (ids) based on search terms
private async Task <BuildNodesInfo> BuildNodesAsync(SearchDataProvider searchDP, string search, string languageId, bool haveUser, List <DataProviderFilterInfo> extraFilters)
{
if (string.IsNullOrEmpty(search))
{
return(new BuildNodesInfo());
}
BuildNodesInfo list = null;
for ( ; ;)
{
search = search.Trim();
if (search.Length <= 0)
{
break;
}
char c = search[0];
if (c == '(')
{
parenLevel++;
search = search.Remove(0, 1);
list = await BuildNodesAsync(searchDP, search, languageId, haveUser, extraFilters);
search = list.Search;
}
else if (c == ')')
{
if (parenLevel <= 0)
{
throw new Error(this.__ResStr("invQueryCloseParen", "Invalid query - too many ')'"));
}
parenLevel--;
list.Search = search.Remove(0, 1);
return(list);
}
else
{
string token;
int irp = search.IndexOf(')');
int i = search.IndexOf(' ');
if (irp >= 0 && (irp < i || i < 0))
{
i = irp;
}
int ilp = search.IndexOf('(');
if (ilp >= 0 && (ilp < i || i < 0))
{
i = ilp;
}
if (i < 0)
{
token = search;
search = "";
}
else
{
token = search.Substring(0, i);
search = search.Remove(0, i);
}
if (list != null)
{
if (string.Compare(token, GetKeyWordOr(), true) == 0)
{
BuildNodesInfo rhsList = await BuildNodesAsync(searchDP, search, languageId, haveUser, extraFilters);
search = rhsList.Search;
list.Data = list.Data.Union(rhsList.Data, new SearchDataComparer()).ToList();
}
else if (string.Compare(token, GetKeyWordAnd(), true) == 0)
{
BuildNodesInfo rhsList = await BuildNodesAsync(searchDP, search, languageId, haveUser, extraFilters);
search = rhsList.Search;
list.Data = list.Data.Intersect(rhsList.Data, new SearchDataComparer()).ToList();
}
else
{
List <DataProviderFilterInfo> filters = DataProviderFilterInfo.Copy(extraFilters);
if (token.EndsWith("*"))
{
token = token.TrimEnd(new char[] { '*' });
filters = DataProviderFilterInfo.Join(filters, new DataProviderFilterInfo {
Field = nameof(SearchData.SearchTerm), Operator = "StartsWith", Value = token
});
}
else
{
filters = DataProviderFilterInfo.Join(filters, new DataProviderFilterInfo {
Field = nameof(SearchData.SearchTerm), Operator = "==", Value = token
});
}
DataProviderGetRecords <SearchData> rhsList = await searchDP.GetItemsWithUrlAsync(0, 0, null, filters);
list.Data = list.Data.Intersect(rhsList.Data, new SearchDataComparer()).ToList();
}
}
else
{
List <DataProviderFilterInfo> filters = DataProviderFilterInfo.Copy(extraFilters);
if (token.EndsWith("*"))
{
token = token.TrimEnd(new char[] { '*' });
filters = DataProviderFilterInfo.Join(filters, new DataProviderFilterInfo {
Field = nameof(SearchData.SearchTerm), Operator = "StartsWith", Value = token
});
}
else
{
filters = DataProviderFilterInfo.Join(filters, new DataProviderFilterInfo {
Field = nameof(SearchData.SearchTerm), Operator = "==", Value = token
});
}
list = new BuildNodesInfo {
Search = search
};
list.Data = (await searchDP.GetItemsWithUrlAsync(0, 0, null, filters)).Data;
search = list.Search;
}
}
}
if (parenLevel > 0)
{
throw new Error(this.__ResStr("invQueryOpenParen", "Invalid query - unmatched '('"));
}
list.Search = search;
return(list);
}