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181
src/Hl7.Fhir.Base/Specification/Terminology/CodeSystemTerminologyService.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,181 @@ | ||
| #nullable enable | ||
|
|
||
| using Hl7.Fhir.Model; | ||
| using Hl7.Fhir.Rest; | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Net; | ||
| using System.Text; | ||
| using System.Threading.Tasks; | ||
| using T = System.Threading.Tasks; | ||
|
|
||
| namespace Hl7.Fhir.Specification.Terminology | ||
| { | ||
| /// <summary> | ||
| /// Base class for checking Code terminology | ||
| /// </summary> | ||
| public abstract class CodeSystemTerminologyService : ITerminologyService | ||
| { | ||
| private readonly string _terminologyType; | ||
| private readonly string _codeSystem; | ||
| private readonly string[] _codeValueSets; | ||
|
|
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| /// <summary> | ||
| /// Base class for checking Code terminology. | ||
| /// </summary> | ||
| /// <param name="terminologyType">String representation of the code type which is being checked. Exclusively used for error messages</param> | ||
| /// <param name="codeSystem">Name of the specification defining the members of the value set</param> | ||
| /// <param name="codeValueSets">uri's of the definitions of the code system. This can be multiple, if a FHIR version has changed this at some point.</param> | ||
| protected CodeSystemTerminologyService(string terminologyType, string codeSystem, string[] codeValueSets) | ||
| { | ||
| _terminologyType = terminologyType; | ||
| _codeSystem = codeSystem; | ||
| _codeValueSets = codeValueSets; | ||
| } | ||
|
|
||
| ///<inheritdoc /> | ||
| public T.Task<Resource> Closure(Parameters parameters, bool useGet = false) => | ||
| throw new NotImplementedException(); | ||
|
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| ///<inheritdoc /> | ||
| public T.Task<Parameters> | ||
| CodeSystemValidateCode(Parameters parameters, string? id = null, bool useGet = false) => | ||
| throw new NotImplementedException(); | ||
|
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| ///<inheritdoc /> | ||
| public T.Task<Resource> Expand(Parameters parameters, string? id = null, bool useGet = false) => | ||
| throw new NotImplementedException(); | ||
|
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| ///<inheritdoc /> | ||
| public T.Task<Parameters> Lookup(Parameters parameters, bool useGet = false) => | ||
| throw new NotImplementedException(); | ||
|
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| ///<inheritdoc /> | ||
| public T.Task<Parameters> Subsumes(Parameters parameters, string? id = null, bool useGet = false) => | ||
| throw new NotImplementedException(); | ||
|
|
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| ///<inheritdoc /> | ||
| public T.Task<Parameters> Translate(Parameters parameters, string? id = null, bool useGet = false) => | ||
| throw new NotImplementedException(); | ||
|
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| ///<inheritdoc /> | ||
| public async T.Task<Parameters> ValueSetValidateCode(Parameters parameters, string? id = null, | ||
| bool useGet = false) | ||
| { | ||
| parameters.CheckForValidityOfValidateCodeParams(); | ||
|
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| var validCodeParams = new ValidateCodeParameters(parameters); | ||
| var valueSetUri = validCodeParams?.Url?.Value != null | ||
| ? new Canonical(validCodeParams?.Url?.Value).Uri | ||
| : null; | ||
|
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| if (_codeValueSets.All(valueSet => valueSet != valueSetUri)) | ||
| { | ||
| // 404 not found | ||
| throw new FhirOperationException($"Cannot find valueset '{validCodeParams!.Url?.Value}'", | ||
| HttpStatusCode.NotFound); | ||
| } | ||
|
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||
| try | ||
| { | ||
| if (validCodeParams!.CodeableConcept is { }) | ||
| return await ValidateCodeVS(validCodeParams.CodeableConcept).ConfigureAwait(false); | ||
| else if (validCodeParams.Coding is { }) | ||
| return await ValidateCodeVS(validCodeParams.Coding).ConfigureAwait(false); | ||
| else | ||
| return await ValidateCodeVS(validCodeParams.Code?.Value, validCodeParams.System?.Value) | ||
| .ConfigureAwait(false); | ||
| } | ||
| catch (Exception e) | ||
| { | ||
| //500 internal server error | ||
| throw new FhirOperationException(e.Message, (HttpStatusCode)500); | ||
| } | ||
|
|
||
| } | ||
|
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| private async Task<Parameters> ValidateCodeVS(Coding coding) | ||
| { | ||
| return await ValidateCodeVS(coding.Code, coding.System).ConfigureAwait(false); | ||
| } | ||
|
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| private async Task<Parameters> ValidateCodeVS(CodeableConcept cc) | ||
| { | ||
| var result = new Parameters(); | ||
|
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| // Maybe just a text, but if there are no codings, that's a positive result | ||
| if (!cc.Coding.Any()) | ||
| { | ||
| result.Add("result", new FhirBoolean(true)); | ||
| return result; | ||
| } | ||
|
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| // If we have just 1 coding, we better handle this using the simpler version of ValidateBinding | ||
| if (cc.Coding.Count == 1) | ||
| return await ValidateCodeVS(cc.Coding.Single()).ConfigureAwait(false); | ||
|
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| // Else, look for one succesful match in any of the codes in the CodeableConcept | ||
| var callResults = await Task.WhenAll(cc.Coding.Select(coding => ValidateCodeVS(coding))).ConfigureAwait(false); | ||
| var anySuccesful = callResults.Any(p => p.GetSingleValue<FhirBoolean>("result")?.Value == true); | ||
|
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| if (anySuccesful == false) | ||
| { | ||
| var messages = new StringBuilder(); | ||
| messages.AppendLine("None of the Codings in the CodeableConcept were valid for the binding. Details follow."); | ||
|
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| // gathering the messages of all calls | ||
| foreach (var msg in callResults.Select(cr => cr.GetSingleValue<FhirString>("message")?.Value).Where(m => m is { })) | ||
| { | ||
| messages.AppendLine(msg); | ||
| } | ||
|
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| result.Add("message", new FhirString(messages.ToString())); | ||
| result.Add("result", new FhirBoolean(false)); | ||
| } | ||
| else | ||
| { | ||
| result.Add("result", new FhirBoolean(true)); | ||
| } | ||
|
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| return result; | ||
| } | ||
|
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| private Task<Parameters> ValidateCodeVS(string? code, string? system) | ||
| { | ||
| var result = new Parameters(); | ||
| var systemUri = system != null ? new Canonical(system).Uri : null; | ||
|
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| if (systemUri == _codeSystem || systemUri == null) | ||
| { | ||
| if (code is null) | ||
| { | ||
| result.Add("message", new FhirString("No code supplied.")) | ||
| .Add("result", new FhirBoolean(false)); | ||
| } | ||
| else | ||
| { | ||
| var success = ValidateCodeType(code); | ||
|
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| if (success) | ||
| { | ||
| result.Add("result", new FhirBoolean(true)); | ||
| } | ||
| else | ||
| { | ||
| result.Add("result", new FhirBoolean(false)) | ||
| .Add("message", new FhirString($"'{code}' is not a valid {_terminologyType}.")); | ||
| } | ||
| } | ||
| } | ||
| else | ||
| { | ||
| throw new FhirOperationException($"Unknown system '{systemUri}'", HttpStatusCode.NotFound); | ||
| } | ||
| return Task.FromResult(result); | ||
| } | ||
| abstract protected bool ValidateCodeType(string code); | ||
| } | ||
| } |
27 changes: 27 additions & 0 deletions
27
src/Hl7.Fhir.Base/Specification/Terminology/LanguageTerminologyService.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| #nullable enable | ||
|
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| using System.Text.RegularExpressions; | ||
|
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| namespace Hl7.Fhir.Specification.Terminology | ||
| { | ||
| /// <summary> | ||
| /// Checks if codes are valid language types | ||
| /// </summary> | ||
| public class LanguageTerminologyService : CodeSystemTerminologyService | ||
| { | ||
| private const string LANGUAGE_SYSTEM = "urn:ietf:bcp:47"; | ||
| public const string LANGUAGE_VALUESET = "http://hl7.org/fhir/ValueSet/all-languages"; | ||
|
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| public LanguageTerminologyService() : base("language", LANGUAGE_SYSTEM, [LANGUAGE_VALUESET]) | ||
| { | ||
| } | ||
|
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| override protected bool ValidateCodeType(string code) | ||
| { | ||
| var regex = new Regex("^[a-z]{2}(-[A-Z]{2})?$"); // matches either two lowercase letters OR 2 lowercase letters followed by a dash and two uppercase letters | ||
| return regex.IsMatch(code); | ||
| } | ||
| } | ||
| } | ||
|
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| #nullable restore |
138 changes: 4 additions & 134 deletions
138
src/Hl7.Fhir.Base/Specification/Terminology/MimeTypeTerminologyService.cs
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