# HG changeset patch
# User Sebastien Jodogne <s.jodogne@gmail.com>
# Date 1403705327 -7200
# Node ID 2fd5a163776d9a218e5db73f2e0a4b1e21a7c67d
# Parent  8811abd6aec9134c18df710a3344cb6bb778e2be
primitives for proper encoding handling

diff -r 8811abd6aec9 -r 2fd5a163776d Core/Enumerations.h
--- a/Core/Enumerations.h	Wed Jun 25 15:32:02 2014 +0200
+++ b/Core/Enumerations.h	Wed Jun 25 16:08:47 2014 +0200
@@ -230,6 +230,7 @@
 
   enum Encoding
   {
+    Encoding_Ascii,
     Encoding_Utf8,
     Encoding_Latin1
   };
diff -r 8811abd6aec9 -r 2fd5a163776d Core/Toolbox.cpp
--- a/Core/Toolbox.cpp	Wed Jun 25 15:32:02 2014 +0200
+++ b/Core/Toolbox.cpp	Wed Jun 25 16:08:47 2014 +0200
@@ -505,6 +505,9 @@
         // Already in UTF-8: No conversion is required
         return source;
 
+      case Encoding_Ascii:
+        return ConvertToAscii(source);;
+
       case Encoding_Latin1:
         encoding = "ISO-8859-1";
         break;
diff -r 8811abd6aec9 -r 2fd5a163776d OrthancServer/FromDcmtkBridge.cpp
--- a/OrthancServer/FromDcmtkBridge.cpp	Wed Jun 25 15:32:02 2014 +0200
+++ b/OrthancServer/FromDcmtkBridge.cpp	Wed Jun 25 16:08:47 2014 +0200
@@ -115,8 +115,18 @@
             GetCharValue(c[3]));
   }
 
+
+  Encoding FromDcmtkBridge::DetectEncoding(DcmDataset& dataset)
+  {
+    // TODO Implement this!
+    return Encoding_Latin1;
+  }
+
+
   void FromDcmtkBridge::Convert(DicomMap& target, DcmDataset& dataset)
   {
+    Encoding encoding = DetectEncoding(dataset);
+
     target.Clear();
     for (unsigned long i = 0; i < dataset.card(); i++)
     {
@@ -125,7 +135,7 @@
       {
         target.SetValue(element->getTag().getGTag(),
                         element->getTag().getETag(),
-                        ConvertLeafElement(*element));
+                        ConvertLeafElement(*element, encoding));
       }
     }
   }
@@ -137,7 +147,8 @@
   }
 
 
-  DicomValue* FromDcmtkBridge::ConvertLeafElement(DcmElement& element)
+  DicomValue* FromDcmtkBridge::ConvertLeafElement(DcmElement& element,
+                                                  Encoding encoding)
   {
     if (!element.isLeaf())
     {
@@ -151,7 +162,7 @@
           c != NULL)
       {
         std::string s(c);
-        std::string utf8 = Toolbox::ConvertToUtf8(s, Encoding_Latin1); // TODO Parameter?
+        std::string utf8 = Toolbox::ConvertToUtf8(s, encoding);
         return new DicomString(utf8);
       }
       else
@@ -313,25 +324,28 @@
 
   static void StoreElement(Json::Value& target,
                            DcmElement& element,
-                           unsigned int maxStringLength);
+                           unsigned int maxStringLength,
+                           Encoding encoding);
 
   static void StoreItem(Json::Value& target,
                         DcmItem& item,
-                        unsigned int maxStringLength)
+                        unsigned int maxStringLength,
+                        Encoding encoding)
   {
     target = Json::Value(Json::objectValue);
 
     for (unsigned long i = 0; i < item.card(); i++)
     {
       DcmElement* element = item.getElement(i);
-      StoreElement(target, *element, maxStringLength);
+      StoreElement(target, *element, maxStringLength, encoding);
     }
   }
 
 
   static void StoreElement(Json::Value& target,
                            DcmElement& element,
-                           unsigned int maxStringLength)
+                           unsigned int maxStringLength,
+                           Encoding encoding)
   {
     assert(target.type() == Json::objectValue);
 
@@ -356,7 +370,7 @@
         value["PrivateCreator"] = tagbis.getPrivateCreator();
       }
 
-      std::auto_ptr<DicomValue> v(FromDcmtkBridge::ConvertLeafElement(element));
+      std::auto_ptr<DicomValue> v(FromDcmtkBridge::ConvertLeafElement(element, encoding));
       if (v->IsNull())
       {
         value["Type"] = "Null";
@@ -393,7 +407,7 @@
       {
         DcmItem* child = sequence.getItem(i);
         Json::Value& v = children.append(Json::objectValue);
-        StoreItem(v, *child, maxStringLength);
+        StoreItem(v, *child, maxStringLength, encoding);
       }  
 
       target[formattedTag]["Name"] = tagName;
@@ -407,7 +421,7 @@
                                DcmDataset& dataset,
                                unsigned int maxStringLength)
   {
-    StoreItem(root, dataset, maxStringLength);
+    StoreItem(root, dataset, maxStringLength, DetectEncoding(dataset));
   }
 
 
diff -r 8811abd6aec9 -r 2fd5a163776d OrthancServer/FromDcmtkBridge.h
--- a/OrthancServer/FromDcmtkBridge.h	Wed Jun 25 15:32:02 2014 +0200
+++ b/OrthancServer/FromDcmtkBridge.h	Wed Jun 25 16:08:47 2014 +0200
@@ -44,11 +44,14 @@
   class FromDcmtkBridge
   {
   public:
+    static Encoding DetectEncoding(DcmDataset& dataset);
+
     static void Convert(DicomMap& target, DcmDataset& dataset);
 
     static DicomTag GetTag(const DcmElement& element);
 
-    static DicomValue* ConvertLeafElement(DcmElement& element);
+    static DicomValue* ConvertLeafElement(DcmElement& element,
+                                          Encoding encoding);
 
     static void ToJson(Json::Value& target, 
                        DcmDataset& dataset,
diff -r 8811abd6aec9 -r 2fd5a163776d OrthancServer/ParsedDicomFile.cpp
--- a/OrthancServer/ParsedDicomFile.cpp	Wed Jun 25 15:32:02 2014 +0200
+++ b/OrthancServer/ParsedDicomFile.cpp	Wed Jun 25 16:08:47 2014 +0200
@@ -146,6 +146,7 @@
   struct ParsedDicomFile::PImpl
   {
     std::auto_ptr<DcmFileFormat> file_;
+    Encoding encoding_;
   };
 
 
@@ -170,6 +171,8 @@
     }
     pimpl_->file_->loadAllDataIntoMemory();
     pimpl_->file_->transferEnd();
+
+    pimpl_->encoding_ = FromDcmtkBridge::DetectEncoding(*pimpl_->file_->getDataset());
   }
 
 
@@ -872,7 +875,7 @@
       return false;
     }
 
-    std::auto_ptr<DicomValue> v(FromDcmtkBridge::ConvertLeafElement(*element));
+    std::auto_ptr<DicomValue> v(FromDcmtkBridge::ConvertLeafElement(*element, pimpl_->encoding_));
 
     if (v.get() == NULL)
     {
@@ -887,7 +890,6 @@
   }
 
 
-
   DicomInstanceHasher ParsedDicomFile::GetHasher()
   {
     std::string patientId, studyUid, seriesUid, instanceUid;
@@ -904,98 +906,6 @@
   }
 
 
-  static void StoreElement(Json::Value& target,
-                           DcmElement& element,
-                           unsigned int maxStringLength);
-
-  static void StoreItem(Json::Value& target,
-                        DcmItem& item,
-                        unsigned int maxStringLength)
-  {
-    target = Json::Value(Json::objectValue);
-
-    for (unsigned long i = 0; i < item.card(); i++)
-    {
-      DcmElement* element = item.getElement(i);
-      StoreElement(target, *element, maxStringLength);
-    }
-  }
-
-
-  static void StoreElement(Json::Value& target,
-                           DcmElement& element,
-                           unsigned int maxStringLength)
-  {
-    assert(target.type() == Json::objectValue);
-
-    DicomTag tag(FromDcmtkBridge::GetTag(element));
-    const std::string formattedTag = tag.Format();
-
-#if 0
-    const std::string tagName = FromDcmtkBridge::GetName(tag);
-#else
-    // This version of the code gives access to the name of the private tags
-    DcmTag tagbis(element.getTag());
-    const std::string tagName(tagbis.getTagName());      
-#endif
-
-    if (element.isLeaf())
-    {
-      Json::Value value(Json::objectValue);
-      value["Name"] = tagName;
-
-      if (tagbis.getPrivateCreator() != NULL)
-      {
-        value["PrivateCreator"] = tagbis.getPrivateCreator();
-      }
-
-      std::auto_ptr<DicomValue> v(FromDcmtkBridge::ConvertLeafElement(element));
-      if (v->IsNull())
-      {
-        value["Type"] = "Null";
-        value["Value"] = Json::nullValue;
-      }
-      else
-      {
-        std::string s = v->AsString();
-        if (maxStringLength == 0 ||
-            s.size() <= maxStringLength)
-        {
-          value["Type"] = "String";
-          value["Value"] = s;
-        }
-        else
-        {
-          value["Type"] = "TooLong";
-          value["Value"] = Json::nullValue;
-        }
-      }
-
-      target[formattedTag] = value;
-    }
-    else
-    {
-      Json::Value children(Json::arrayValue);
-
-      // "All subclasses of DcmElement except for DcmSequenceOfItems
-      // are leaf nodes, while DcmSequenceOfItems, DcmItem, DcmDataset
-      // etc. are not." The following cast is thus OK.
-      DcmSequenceOfItems& sequence = dynamic_cast<DcmSequenceOfItems&>(element);
-
-      for (unsigned long i = 0; i < sequence.card(); i++)
-      {
-        DcmItem* child = sequence.getItem(i);
-        Json::Value& v = children.append(Json::objectValue);
-        StoreItem(v, *child, maxStringLength);
-      }  
-
-      target[formattedTag]["Name"] = tagName;
-      target[formattedTag]["Type"] = "Sequence";
-      target[formattedTag]["Value"] = children;
-    }
-  }
-
-
   template <typename T>
   static void ExtractPngImageTruncate(std::string& result,
                                       DicomIntegerPixelAccessor& accessor,
@@ -1044,6 +954,7 @@
   ParsedDicomFile::ParsedDicomFile() : pimpl_(new PImpl)
   {
     pimpl_->file_.reset(new DcmFileFormat);
+    pimpl_->encoding_ = Encoding_Ascii;
     Replace(DICOM_TAG_PATIENT_ID, FromDcmtkBridge::GenerateUniqueIdentifier(ResourceType_Patient));
     Replace(DICOM_TAG_STUDY_INSTANCE_UID, FromDcmtkBridge::GenerateUniqueIdentifier(ResourceType_Study));
     Replace(DICOM_TAG_SERIES_INSTANCE_UID, FromDcmtkBridge::GenerateUniqueIdentifier(ResourceType_Series));
@@ -1073,6 +984,8 @@
     pimpl_(new PImpl)
   {
     pimpl_->file_.reset(dynamic_cast<DcmFileFormat*>(other.pimpl_->file_->clone()));
+
+    pimpl_->encoding_ = other.pimpl_->encoding_;
   }
 
 
@@ -1279,4 +1192,9 @@
     writer.WriteToMemory(result, accessor);
   }
 
+
+  Encoding ParsedDicomFile::GetEncoding() const
+  {
+    return pimpl_->encoding_;
+  }
 }
diff -r 8811abd6aec9 -r 2fd5a163776d OrthancServer/ParsedDicomFile.h
--- a/OrthancServer/ParsedDicomFile.h	Wed Jun 25 15:32:02 2014 +0200
+++ b/OrthancServer/ParsedDicomFile.h	Wed Jun 25 16:08:47 2014 +0200
@@ -104,6 +104,8 @@
     void ExtractPngImage(std::string& result,
                          unsigned int frame,
                          ImageExtractionMode mode);
+
+    Encoding GetEncoding() const;
   };
 
 }