public SearchOptions Create(string compartmentType, string compartmentId, string resourceType, IReadOnlyList <Tuple <string, string> > queryParameters)
{
var searchOptions = new SearchOptions();
string continuationToken = null;
var searchParams = new SearchParams();
var unsupportedSearchParameters = new List <Tuple <string, string> >();
// Extract the continuation token, filter out the other known query parameters that's not search related.
foreach (Tuple <string, string> query in queryParameters ?? Enumerable.Empty <Tuple <string, string> >())
{
if (query.Item1 == KnownQueryParameterNames.ContinuationToken)
{
// This is an unreachable case. The mapping of the query parameters makes it so only one continuation token can exist.
if (continuationToken != null)
{
throw new InvalidSearchOperationException(
string.Format(Core.Resources.MultipleQueryParametersNotAllowed, KnownQueryParameterNames.ContinuationToken));
}
// Checks if the continuation token is base 64 bit encoded. Needed for systems that have cached continuation tokens from before they were encoded.
if (Base64FormatRegex.IsMatch(query.Item2))
{
continuationToken = System.Text.Encoding.UTF8.GetString(Convert.FromBase64String(query.Item2));
}
else
{
continuationToken = query.Item2;
}
}
else if (query.Item1 == KnownQueryParameterNames.Format)
{
// TODO: We need to handle format parameter.
}
else if (string.IsNullOrWhiteSpace(query.Item1) || string.IsNullOrWhiteSpace(query.Item2))
{
// Query parameter with empty value is not supported.
unsupportedSearchParameters.Add(query);
}
else if (string.Compare(query.Item1, KnownQueryParameterNames.Total, StringComparison.OrdinalIgnoreCase) == 0)
{
if (Enum.TryParse <TotalType>(query.Item2, true, out var totalType))
{
// Estimate is not yet supported.
if (totalType == TotalType.Estimate)
{
throw new SearchOperationNotSupportedException(Core.Resources.UnsupportedTotalParameter);
}
searchOptions.IncludeTotal = totalType;
}
else
{
throw new BadRequestException(Core.Resources.UnsupportedTotalParameter);
}
}
else
{
// Parse the search parameters.
try
{
// Basic format checking (e.g. integer value for _count key etc.).
searchParams.Add(query.Item1, query.Item2);
}
catch (Exception ex)
{
throw new BadRequestException(ex.Message);
}
}
}
searchOptions.ContinuationToken = continuationToken;
// Check the item count.
if (searchParams.Count != null)
{
searchOptions.MaxItemCount = searchParams.Count.Value;
}
// Check to see if only the count should be returned
searchOptions.CountOnly = searchParams.Summary == SummaryType.Count;
// If the resource type is not specified, then the common
// search parameters should be used.
ResourceType parsedResourceType = ResourceType.DomainResource;
if (!string.IsNullOrWhiteSpace(resourceType) &&
!Enum.TryParse(resourceType, out parsedResourceType))
{
throw new ResourceNotSupportedException(resourceType);
}
var searchExpressions = new List <Expression>();
if (!string.IsNullOrWhiteSpace(resourceType))
{
searchExpressions.Add(Expression.SearchParameter(_resourceTypeSearchParameter, Expression.StringEquals(FieldName.TokenCode, null, resourceType, false)));
}
searchExpressions.AddRange(searchParams.Parameters.Select(
q =>
{
try
{
return(_expressionParser.Parse(parsedResourceType.ToString(), q.Item1, q.Item2));
}
catch (SearchParameterNotSupportedException)
{
unsupportedSearchParameters.Add(q);
return(null);
}
})
.Where(item => item != null));
if (searchParams.Include?.Count > 0)
{
searchExpressions.AddRange(searchParams.Include.Select(
q => _expressionParser.ParseInclude(parsedResourceType.ToString(), q))
.Where(item => item != null));
}
if (!string.IsNullOrWhiteSpace(compartmentType))
{
if (Enum.TryParse(compartmentType, out CompartmentType parsedCompartmentType))
{
if (string.IsNullOrWhiteSpace(compartmentId))
{
throw new InvalidSearchOperationException(Core.Resources.CompartmentIdIsInvalid);
}
searchExpressions.Add(Expression.CompartmentSearch(compartmentType, compartmentId));
}
else
{
throw new InvalidSearchOperationException(string.Format(Core.Resources.CompartmentTypeIsInvalid, compartmentType));
}
}
if (searchExpressions.Count == 1)
{
searchOptions.Expression = searchExpressions[0];
}
else if (searchExpressions.Count > 1)
{
searchOptions.Expression = Expression.And(searchExpressions.ToArray());
}
if (unsupportedSearchParameters.Any())
{
// TODO: Client can specify whether exception should be raised or not when it encounters unknown search parameters.
// For now, we will ignore any unknown search parameters.
}
searchOptions.UnsupportedSearchParams = unsupportedSearchParameters;
if (searchParams.Sort?.Count > 0)
{
var sortings = new List <(SearchParameterInfo, SortOrder)>();
List <(string parameterName, string reason)> unsupportedSortings = null;
foreach (Tuple <string, Hl7.Fhir.Rest.SortOrder> sorting in searchParams.Sort)
{
try
{
SearchParameterInfo searchParameterInfo = _searchParameterDefinitionManager.GetSearchParameter(parsedResourceType.ToString(), sorting.Item1);
sortings.Add((searchParameterInfo, sorting.Item2.ToCoreSortOrder()));
}
catch (SearchParameterNotSupportedException)
{
(unsupportedSortings ??= new List <(string parameterName, string reason)>()).Add((sorting.Item1, string.Format(Core.Resources.SearchParameterNotSupported, sorting.Item1, resourceType)));
}
}
searchOptions.Sort = sortings;
searchOptions.UnsupportedSortingParams = (IReadOnlyList <(string parameterName, string reason)>)unsupportedSortings ?? Array.Empty <(string parameterName, string reason)>();
}
else
{
searchOptions.Sort = Array.Empty <(SearchParameterInfo searchParameterInfo, SortOrder sortOrder)>();
searchOptions.UnsupportedSortingParams = Array.Empty <(string parameterName, string reason)>();
}
return(searchOptions);
}
public async Task <SearchResult> SearchHistoryAsync(
string resourceType,
string resourceId,
PartialDateTime at,
PartialDateTime since,
PartialDateTime before,
int?count,
string continuationToken,
CancellationToken cancellationToken)
{
var queryParameters = new List <Tuple <string, string> >();
if (at != null)
{
if (since != null)
{
// _at and _since cannot be both specified.
throw new InvalidSearchOperationException(
string.Format(
CultureInfo.InvariantCulture,
Core.Resources.AtCannotBeSpecifiedWithBeforeOrSince,
KnownQueryParameterNames.At,
KnownQueryParameterNames.Since));
}
if (before != null)
{
// _at and _since cannot be both specified.
throw new InvalidSearchOperationException(
string.Format(
CultureInfo.InvariantCulture,
Core.Resources.AtCannotBeSpecifiedWithBeforeOrSince,
KnownQueryParameterNames.At,
KnownQueryParameterNames.Before));
}
}
if (before != null)
{
var beforeOffset = before.ToDateTimeOffset(
defaultMonth: 1,
defaultDaySelector: (year, month) => 1,
defaultHour: 0,
defaultMinute: 0,
defaultSecond: 0,
defaultFraction: 0.0000000m,
defaultUtcOffset: TimeSpan.Zero).ToUniversalTime();
if (beforeOffset.CompareTo(Clock.UtcNow) > 0)
{
// you cannot specify a value for _before in the future
throw new InvalidSearchOperationException(
string.Format(
CultureInfo.InvariantCulture,
Core.Resources.HistoryParameterBeforeCannotBeFuture,
KnownQueryParameterNames.Before));
}
}
bool searchByResourceId = !string.IsNullOrEmpty(resourceId);
if (searchByResourceId)
{
queryParameters.Add(Tuple.Create(SearchParameterNames.Id, resourceId));
}
if (!string.IsNullOrEmpty(continuationToken))
{
queryParameters.Add(Tuple.Create(KnownQueryParameterNames.ContinuationToken, continuationToken));
}
if (at != null)
{
queryParameters.Add(Tuple.Create(SearchParameterNames.LastUpdated, at.ToString()));
}
else
{
if (since != null)
{
queryParameters.Add(Tuple.Create(SearchParameterNames.LastUpdated, $"ge{since}"));
}
if (before != null)
{
queryParameters.Add(Tuple.Create(SearchParameterNames.LastUpdated, $"lt{before}"));
}
}
if (count.HasValue && count > 0)
{
queryParameters.Add(Tuple.Create(KnownQueryParameterNames.Count, count.ToString()));
}
SearchOptions searchOptions = _searchOptionsFactory.Create(resourceType, queryParameters);
SearchResult searchResult = await SearchHistoryInternalAsync(searchOptions, cancellationToken);
// If no results are returned from the _history search
// determine if the resource actually exists or if the results were just filtered out.
// The 'deleted' state has no effect because history will return deleted resources
if (searchByResourceId && searchResult.Results.Any() == false)
{
var resource = await _fhirDataStore.GetAsync(new ResourceKey(resourceType, resourceId), cancellationToken);
if (resource == null)
{
throw new ResourceNotFoundException(string.Format(Core.Resources.ResourceNotFoundById, resourceType, resourceId));
}
}
return(searchResult);
}
protected abstract Task <SearchResult> SearchForReindexInternalAsync(
SearchOptions searchOptions,
string searchParameterHash,
CancellationToken cancellationToken);
protected abstract Task <SearchResult> SearchHistoryInternalAsync(
SearchOptions searchOptions,
CancellationToken cancellationToken);
public SearchOptions Create(string compartmentType, string compartmentId, string resourceType, IReadOnlyList <Tuple <string, string> > queryParameters)
{
var searchOptions = new SearchOptions();
string continuationToken = null;
var searchParams = new SearchParams();
var unsupportedSearchParameters = new List <Tuple <string, string> >();
// Extract the continuation token, filter out the other known query parameters that's not search related.
foreach (Tuple <string, string> query in queryParameters ?? Enumerable.Empty <Tuple <string, string> >())
{
if (query.Item1 == KnownQueryParameterNames.ContinuationToken)
{
// This is an unreachable case. The mapping of the query parameters makes it so only one continuation token can exist.
if (continuationToken != null)
{
throw new InvalidSearchOperationException(
string.Format(Core.Resources.MultipleQueryParametersNotAllowed, KnownQueryParameterNames.ContinuationToken));
}
// Checks if the continuation token is base 64 bit encoded. Needed for systems that have cached continuation tokens from before they were encoded.
if (Regex.IsMatch(query.Item2, "^([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)?$"))
{
continuationToken = System.Text.Encoding.UTF8.GetString(Convert.FromBase64String(query.Item2));
}
else
{
continuationToken = query.Item2;
}
}
else if (query.Item1 == KnownQueryParameterNames.Format)
{
// TODO: We need to handle format parameter.
}
else if (string.IsNullOrWhiteSpace(query.Item1) || string.IsNullOrWhiteSpace(query.Item2))
{
// Query parameter with empty value is not supported.
unsupportedSearchParameters.Add(query);
}
else
{
// Parse the search parameters.
try
{
searchParams.Add(query.Item1, query.Item2);
}
catch (Exception ex)
{
_logger.LogInformation(ex, "Failed to parse the query parameter. Skipping.");
// There was a problem parsing the parameter. Add it to list of unsupported parameters.
unsupportedSearchParameters.Add(query);
}
}
}
searchOptions.ContinuationToken = continuationToken;
// Check the item count.
if (searchParams.Count != null)
{
searchOptions.MaxItemCount = searchParams.Count.Value;
}
// Check to see if only the count should be returned
searchOptions.CountOnly = searchParams.Summary == SummaryType.Count;
// If the resource type is not specified, then the common
// search parameters should be used.
ResourceType parsedResourceType = ResourceType.DomainResource;
if (!string.IsNullOrWhiteSpace(resourceType) &&
!Enum.TryParse(resourceType, out parsedResourceType))
{
throw new ResourceNotSupportedException(resourceType);
}
var searchExpressions = new List <Expression>();
if (!string.IsNullOrWhiteSpace(resourceType))
{
searchExpressions.Add(Expression.SearchParameter(_resourceTypeSearchParameter, Expression.StringEquals(FieldName.TokenCode, null, resourceType, false)));
}
searchExpressions.AddRange(searchParams.Parameters.Select(
q =>
{
try
{
return(_expressionParser.Parse(parsedResourceType.ToString(), q.Item1, q.Item2));
}
catch (SearchParameterNotSupportedException)
{
unsupportedSearchParameters.Add(q);
return(null);
}
})
.Where(item => item != null));
if (!string.IsNullOrWhiteSpace(compartmentType))
{
if (Enum.TryParse(compartmentType, out CompartmentType parsedCompartmentType))
{
if (string.IsNullOrWhiteSpace(compartmentId))
{
throw new InvalidSearchOperationException(Core.Resources.CompartmentIdIsInvalid);
}
searchExpressions.Add(Expression.CompartmentSearch(compartmentType, compartmentId));
}
else
{
throw new InvalidSearchOperationException(string.Format(Core.Resources.CompartmentTypeIsInvalid, compartmentType));
}
}
if (searchExpressions.Count == 1)
{
searchOptions.Expression = searchExpressions[0];
}
else if (searchExpressions.Count > 1)
{
searchOptions.Expression = Expression.And(searchExpressions.ToArray());
}
if (unsupportedSearchParameters.Any())
{
// TODO: Client can specify whether exception should be raised or not when it encounters unknown search parameters.
// For now, we will ignore any unknown search parameters.
}
searchOptions.UnsupportedSearchParams = unsupportedSearchParameters;
return(searchOptions);
}
