/*
 *
 *  Copyright (C) 2000-2017, OFFIS e.V.
 *  All rights reserved.  See COPYRIGHT file for details.
 *
 *  This software and supporting documentation were developed by
 *
 *    OFFIS e.V.
 *    R&D Division Health
 *    Escherweg 2
 *    D-26121 Oldenburg, Germany
 *
 *
 *  Module: dcmsr
 *
 *  Author: Joerg Riesmeier
 *
 *  Purpose:
 *    classes: DSRContainerTreeNode
 *
 */


#ifndef DSRCONTN_H
#define DSRCONTN_H

#include "dcmtk/config/osconfig.h"   /* make sure OS specific configuration is included first */

#include "dcmtk/dcmsr/dsrdoctn.h"


/*---------------------*
 *  class declaration  *
 *---------------------*/

/** Class for content item CONTAINER
 */
class DCMTK_DCMSR_EXPORT DSRContainerTreeNode
  : public DSRDocumentTreeNode
{

  public:

    /** constructor
     ** @param  relationshipType     type of relationship to the parent tree node.  Should
     *                               not be DSRTypes::RT_invalid or DSRTypes::RT_isRoot.
     *  @param  continuityOfContent  Continuity of content flag (default: separate).
     *                               Should be different from DSRTypes::COC_invalid.
     */
    DSRContainerTreeNode(const E_RelationshipType relationshipType,
                         const E_ContinuityOfContent continuityOfContent = COC_Separate);

    /** copy constructor.
     *  Please note that the comments on the copy constructor of the base class
     *  DSRDocumentTreeNode apply.
     ** @param  node  tree node to be copied
     */
    DSRContainerTreeNode(const DSRContainerTreeNode &node);

    /** destructor
     */
    virtual ~DSRContainerTreeNode();

    /** comparison operator "equal".
     *  Two tree nodes are equal if the comparison operator of the base class DSRDocumentTreeNode
     *  regards them as "equal" (same types and concept names) and the stored values are equal.
     ** @param  node  tree node that should be compared to the current one
     ** @return OFTrue if both tree nodes are equal, OFFalse otherwise
     */
    virtual OFBool operator==(const DSRDocumentTreeNode &node) const;

    /** comparison operator "not equal".
     *  Two tree nodes are not equal if either the comparison operator of the base class
     *  DSRDocumentTreeNode regards them as "not equal" (different types or concept names) or
     *  the stored values are not equal.
     ** @param  node  tree node that should be compared to the current one
     ** @return OFTrue if both tree nodes are not equal, OFFalse otherwise
     */
    virtual OFBool operator!=(const DSRDocumentTreeNode &node) const;

    /** clone this tree node.
     *  Internally, the copy constructor is used, so the corresponding comments apply.
     ** @return copy of this tree node
     */
    virtual DSRContainerTreeNode *clone() const;

    /** clear all member variables.
     *  Please note that the content item might become invalid afterwards.
     */
    virtual void clear();

    /** check whether the content item is valid.
     *  The content item is valid if the base class is valid, the value is valid (see hasValidValue()),
     *  and the concept name is valid or the content item is not the root item.
     ** @return OFTrue if tree node is valid, OFFalse otherwise
     */
    virtual OFBool isValid() const;

    /** check whether the value of the content item, i.e.\ the continuity of content flag, is valid
     ** @return OFTrue if the value is valid, OFFalse otherwise
     */
    virtual OFBool hasValidValue() const;

    /** check whether the content is short.
     *  A container content item is defined to be never short (return always OFFalse).
     ** @param  flags  flag used to customize the output (see DSRTypes::HF_xxx)
     ** @return OFTrue if the content is short, OFFalse otherwise
     */
    virtual OFBool isShort(const size_t flags) const;

    /** print content item.
     *  A typical output looks like this: CONTAINER:(,,"Diagnosis")=SEPARATE for the root node
     *  and contains CONTAINER:=CONTINUOUS for a "normal" content item.
     ** @param  stream  output stream to which the content item should be printed
     *  @param  flags   flag used to customize the output (see DSRTypes::PF_xxx)
     ** @return status, EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition print(STD_NAMESPACE ostream &stream,
                              const size_t flags) const;

    /** write content item in XML format
     ** @param  stream  output stream to which the XML document is written
     *  @param  flags   flag used to customize the output (see DSRTypes::XF_xxx)
     ** @return status, EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition writeXML(STD_NAMESPACE ostream &stream,
                                 const size_t flags) const;

    /** render content item in HTML/XHTML format.
     *  After rendering the current content item all child nodes (if any) are also rendered
     *  (see renderHTMLChildNodes() for details).  This method overwrites the one specified in
     *  base class DSRDocumentTreeNode since the rendering of the child nodes depends on the
     *  value of the flag 'ContinuityOfContent'.
     ** @param  docStream     output stream to which the main HTML/XHTML document is written
     *  @param  annexStream   output stream to which the HTML/XHTML document annex is written
     *  @param  nestingLevel  current nesting level.  Used to render section headings.
     *  @param  annexNumber   reference to the variable where the current annex number is stored.
     *                        Value is increased automatically by 1 after a new entry has been added.
     *  @param  flags         flag used to customize the output (see DSRTypes::HF_xxx)
     ** @return status, EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition renderHTML(STD_NAMESPACE ostream &docStream,
                                   STD_NAMESPACE ostream &annexStream,
                                   const size_t nestingLevel,
                                   size_t &annexNumber,
                                   const size_t flags) const;

    /** get continuity of content flag.
     *  This flag specifies whether or not its contained content items (child nodes) are
     *  logically linked in a continuous textual flow, or are separate items.
     ** @return continuity of content flag if successful, DSRTypes::COC_invalid otherwise
     */
    inline E_ContinuityOfContent getContinuityOfContent() const
    {
        return ContinuityOfContent;
    }

    /** set continuity of content flag.
     *  This flag specifies whether or not its contained content items (child nodes) are
     *  logically linked in a continuous textual flow, or are separate items.
     ** @param  continuityOfContent  value to be set
     *                               (should be different from DSRTypes::COC_invalid)
     *  @param  check                dummy parameter (currently not used)
     ** @return status, EC_Normal if successful, an error code otherwise
     */
    OFCondition setContinuityOfContent(const E_ContinuityOfContent continuityOfContent,
                                       const OFBool check = OFTrue);


  protected:

    /** read content item (value) from dataset
     ** @param  dataset  DICOM dataset from which the content item should be read
     *  @param  flags    flag used to customize the reading process (see DSRTypes::RF_xxx)
     ** @return status, EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition readContentItem(DcmItem &dataset,
                                        const size_t flags);

    /** write content item (value) to dataset
     ** @param  dataset  DICOM dataset to which the content item should be written
     ** @return status, EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition writeContentItem(DcmItem &dataset) const;

    /** read content item specific XML data
     ** @param  doc     document containing the XML file content
     *  @param  cursor  cursor pointing to the starting node
     *  @param  flags   flag used to customize the reading process (see DSRTypes::XF_xxx)
     ** @return status, EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition readXMLContentItem(const DSRXMLDocument &doc,
                                           DSRXMLCursor cursor,
                                           const size_t flags);

    /** render content item (value) in HTML/XHTML format
     ** @param  docStream     output stream to which the main HTML/XHTML document is written
     *  @param  annexStream   output stream to which the HTML/XHTML document annex is written
     *  @param  nestingLevel  current nesting level.  Used to render section headings.
     *  @param  annexNumber   reference to the variable where the current annex number is stored.
     *                        Value is increased automatically by 1 after a new entry has been added.
     *  @param  flags         flag used to customize the output (see DSRTypes::HF_xxx)
     ** @return status, EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition renderHTMLContentItem(STD_NAMESPACE ostream &docStream,
                                              STD_NAMESPACE ostream &annexStream,
                                              const size_t nestingLevel,
                                              size_t &annexNumber,
                                              const size_t flags) const;


  private:

    /// continuity of content flag (associated DICOM VR=CS, mandatory)
    E_ContinuityOfContent ContinuityOfContent;


 // --- declaration of default constructor and assignment operator

    DSRContainerTreeNode();
    DSRContainerTreeNode &operator=(const DSRContainerTreeNode &);
};


#endif
