# JsonBodyWriter.java

    /*
    ** Module   : JsonBodyWriter.java
    ** Abstract : Implementation of the builtin class.
    **
    ** Copyright (c) 2019-2023, Golden Code Development Corporation.
    **
    ** -#- -I- --Date-- ---------------------------------------Description----------------------------------------
    ** 001 IAS 20190923 First version.
    ** 002 MP  20200611 Added missing methods as stubs taken by converting the skeleton using FWD.
    ** 003 CA  20210113 Renamed Iiterator.next to Iiterator.next_, to follow NameConverter's rules.
    **                  Renamed clear() to clear_(), to follow NameConverter's rules.
    ** 004 ME  20210210 Fix/extend implementation as of OE12.2.
    ** 005 CA  20210221 Fixed 'qualified', 'extent' and 'returns' annotations at the legacy
    **                  signature.
    ** 006 ME  20210324 Moved legacy error serialization in JsonExport.
    **     VVT 20210917 Javadoc fixed.
    **     VVT 20221003 CommonHandle.getResourceType() method renamed to resourceType() to prevent conflicts
    **                  with namesakes in DMO. See #6694.
    ** 007 CA  20231113 The 'execute' method must be annotated with LegacySignature Type.Execute, and also can be
    **                  dropped if is a no-op.
    */

    /*
    ** This program is free software: you can redistribute it and/or modify
    ** it under the terms of the GNU Affero General Public License as
    ** published by the Free Software Foundation, either version 3 of the
    ** License, or (at your option) any later version.
    **
    ** This program is distributed in the hope that it will be useful,
    ** but WITHOUT ANY WARRANTY; without even the implied warranty of
    ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ** GNU Affero General Public License for more details.
    **
    ** You may find a copy of the GNU Affero GPL version 3 at the following
    ** location: https://www.gnu.org/licenses/agpl-3.0.en.html
    **
    ** Additional terms under GNU Affero GPL version 3 section 7:
    **
    **   Under Section 7 of the GNU Affero GPL version 3, the following additional
    **   terms apply to the works covered under the License.  These additional terms
    **   are non-permissive additional terms allowed under Section 7 of the GNU
    **   Affero GPL version 3 and may not be removed by you.
    **
    **   0. Attribution Requirement.
    **
    **     You must preserve all legal notices or author attributions in the covered
    **     work or Appropriate Legal Notices displayed by works containing the covered
    **     work.  You may not remove from the covered work any author or developer
    **     credit already included within the covered work.
    **
    **   1. No License To Use Trademarks.
    **
    **     This license does not grant any license or rights to use the trademarks
    **     Golden Code, FWD, any Golden Code or FWD logo, or any other trademarks
    **     of Golden Code Development Corporation. You are not authorized to use the
    **     name Golden Code, FWD, or the names of any author or contributor, for
    **     publicity purposes without written authorization.
    **
    **   2. No Misrepresentation of Affiliation.
    **
    **     You may not represent yourself as Golden Code Development Corporation or FWD.
    **
    **     You may not represent yourself for publicity purposes as associated with
    **     Golden Code Development Corporation, FWD, or any author or contributor to
    **     the covered work, without written authorization.
    **
    **   3. No Misrepresentation of Source or Origin.
    **
    **     You may not represent the covered work as solely your work.  All modified
    **     versions of the covered work must be marked in a reasonable way to make it
    **     clear that the modified work is not originating from Golden Code Development
    **     Corporation or FWD.  All modified versions must contain the notices of
    **     attribution required in this license.
    */

    package com.goldencode.p2j.oo.net.http.filter.payload;

    import static com.goldencode.p2j.util.BlockManager.externalProcedure;
    import static com.goldencode.p2j.report.ReportConstants.*;
    import static com.goldencode.p2j.util.BlockManager.function;
    import static com.goldencode.p2j.util.BlockManager.internalProcedure;
    import static com.goldencode.p2j.util.BlockManager.onBlockLevel;
    import static com.goldencode.p2j.util.BlockManager.returnNormal;
    import static com.goldencode.p2j.util.BlockManager.undoThrow;

    import com.goldencode.p2j.oo.common.support.IcharacterHolder;
    import com.goldencode.p2j.oo.common.support.IhandleHolder;
    import com.goldencode.p2j.oo.common.support.IlongcharHolder;
    import com.goldencode.p2j.oo.common.support.ImemptrHolder;
    import com.goldencode.p2j.oo.core.*;
    import com.goldencode.p2j.oo.core.collections.Icollection;
    import com.goldencode.p2j.oo.core.collections.Iiterator;
    import com.goldencode.p2j.oo.core.collections.Imap;
    import com.goldencode.p2j.oo.core.collections.LegacyMapEntry;
    import com.goldencode.p2j.oo.io.*;
    import com.goldencode.p2j.oo.json.objectmodel.*;
    import com.goldencode.p2j.oo.lang.*;
    import com.goldencode.p2j.persist.TargetData;
    import com.goldencode.p2j.persist.serial.JsonExport;
    import com.goldencode.p2j.persist.serial.Serializator;
    import com.goldencode.p2j.util.*;
    import com.goldencode.p2j.util.BlockManager.Action;
    import com.goldencode.p2j.util.BlockManager.Condition;
    import com.goldencode.p2j.util.InternalEntry.*;

    /**
     *
     * Write application/json body.
     *
     */
    @LegacyResource(resource = "OpenEdge.Net.HTTP.Filter.Payload.JsonBodyWriter")
    @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_PARTIAL)
    public class JsonBodyWriter
    extends com.goldencode.p2j.oo.net.http.filter.payload.MessageWriter
    {
       /**
        * Execute
        */
       @LegacySignature(type = Type.EXECUTE)
       public void __net_http_filter_payload_JsonBodyWriter_execute__()
       {
          onBlockLevel(Condition.ERROR, Action.THROW);
       }

       /**
        * Constructor
        */
       @LegacySignature(type = Type.CONSTRUCTOR)
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_FULL)
       public void __net_http_filter_payload_JsonBodyWriter_constructor__()
       {
          internalProcedure(this, "__net_http_filter_payload_JsonBodyWriter_constructor__",
                new Block((Body) () ->
          {
             __net_http_filter_payload_MessageWriter_constructor__(
                   ObjectOps.getLegacyClass(ByteBucket.class));
          }));
       }

       /**
        * Opens the writer for output.
        */
       @LegacySignature(type = Type.METHOD, name = "Open")
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_FULL)
       @Override
       public void open()
       {
          internalProcedure(this, "Open", new Block((Body) () ->
          {
             if (!entity._isValid())
             {
                entity.assign(ByteBucket.instance());
             }

             super.open();
          }));
       }

       @LegacySignature(returns = "INT64", type = Type.METHOD, name = "Write", parameters =
       {
          @LegacyParameter(name = "phData", type = "HANDLE", mode = "INPUT")
       })
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_FULL)
       @Override
       public int64 write(final handle _phData)
       {
          handle phData = TypeFactory.initInput(_phData);
          memptr mResult = TypeFactory.memptr();

          return function(JsonBodyWriter.class, this, "Write", int64.class, new Block((Body) () ->
          {
             if (phData._isValid())
             {
                if (phData.isType("TEMP-TABLE") || phData.isType("DATASET") || phData.isType("BUFFER"))
                {
                   long now = System.currentTimeMillis();
                   phData.unwrapJsonData().writeJson(new TargetData(Serializator.TYPE_MEMPTR, mResult), SessionUtils.isDebugAlert());
                   getLogger().ref().trace(TextOps.substitute("WRITE-JSON took &1ms", System.currentTimeMillis() - now));
                   bucket().putBytes(mResult);
                   returnNormal(mResult.length());
                }
                else
                {
                   String errMsg = "Unsupported handle type: " + phData.unwrapType().resourceType().getValue();
                   undoThrow(AppError.newInstance(errMsg, 0));
                }
             }
             else
             {
                bucket().clear_();
                returnNormal(write(new longchar("null")));
             }
          }, (Fini) () -> {
             mResult.setLength(0);
          }));
       }

       /**
        * Write data to/from the entity
        *
        * @param _pData data to be written
        *
        * @return number of bytes written
        */
       @LegacySignature(returns = "INT64", type = Type.METHOD, name = "Write", parameters =
       {
          @LegacyParameter(name = "pData", type = "LONGCHAR", mode = "INPUT")
       })
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_FULL)
       @Override
       public int64 write(longchar _pData)
       {
          longchar pData = TypeFactory.initInput(_pData);

          return function(this, "Write", int64.class, new Block((Body) () ->
          {
             bucket().putString(pData);
             returnNormal(TextOps.byteLength(pData));
          }));
       }

       /**
        * Write data to/from the entity
        *
        * @param pData data to be written
        *
        * @return number of bytes written
        */
       @LegacySignature(returns = "INT64", type = Type.METHOD, name = "Write", parameters =
       {
          @LegacyParameter(name = "pData", type = "MEMPTR", mode = "INPUT")
       })
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_FULL)
       @Override
       public int64 write(memptr pData)
       {
          return function(this, "Write", int64.class, new Block((Body) () ->
          {
             bucket().putBytes(pData.getPointerValue(), pData.length());
             returnNormal(pData.length());
          }));
       }

       @LegacySignature(returns = "INT64", type = Type.METHOD, name = "WriteHandle", parameters =
       {
          @LegacyParameter(name = "phData", type = "HANDLE", mode = "INPUT")
       })
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_FULL)
       public int64 writeHandle(final handle _phData)
       {
          handle phData = TypeFactory.initInput(_phData);

          return function(JsonBodyWriter.class, this, "WriteHandle", int64.class, new Block((Body) () ->
          {
             returnNormal(this.write(phData));
          }));
       }

       /**
        * Write data to/from the entity
        *
        * @param poData data to be written
        *
        * @return number of bytes written
        */
       @LegacySignature(returns = "INT64", type = Type.METHOD, name = "Write", parameters =
       {
          @LegacyParameter(name = "poData", type = "OBJECT",
                qualified = "progress.lang.object", mode = "INPUT")
       })
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_PARTIAL)
       @Override
       public int64 write(object<? extends _BaseObject_> poData)
       {
          memptr mptr = TypeFactory.memptr();

          return function(this, "Write", int64.class, new Block((Body) () ->
          {
             if (!poData._isValid())
             {
                bucket().clear_();
                returnNormal(write(new longchar("Null")));
             }
             else if (ObjectOps.typeOf(poData, LegacyError.class).booleanValue())
             {
                returnNormal(write(JsonExport.serializeError(ObjectOps.cast(poData, LegacyError.class))));
             }
             else if (ObjectOps.typeOf(poData, IcharacterHolder.class).booleanValue())
             {
                object<? extends IcharacterHolder> oICharHolder = ObjectOps.cast(poData, IcharacterHolder.class);
                returnNormal(write(new longchar(oICharHolder.ref().getValue())));
             }
             else if (ObjectOps.typeOf(poData, IlongcharHolder.class).booleanValue())
             {
                object<? extends IlongcharHolder> oLongcharH = ObjectOps.cast(poData, IlongcharHolder.class);
                returnNormal(write(oLongcharH.ref().getValue()));
             }
             else if (ObjectOps.typeOf(poData, FileInputStream.class).booleanValue())
             {
                object<? extends FileInputStream> fis = ObjectOps.cast(poData, FileInputStream.class);

                String[] result = TextOps.splitInt(fis.ref().getFileName().getValue(), '.');

                if (result[result.length - 1].equalsIgnoreCase("json"))
                {
                   returnNormal(this.writeFileStream(fis));
                }

                String msg = String.format("Unsupported file extension .%s for JSON", result[result.length - 1]);
                undoThrow(AppError.newInstance(msg, 0));
             }
             else if (ObjectOps.typeOf(poData, IhandleHolder.class).booleanValue())
             {
                object<? extends IhandleHolder> oHandleHolder = ObjectOps.cast(poData, IhandleHolder.class);
                handle hdl = oHandleHolder.ref().getValue();
                returnNormal(this.write(hdl));
             }
             else if (ObjectOps.typeOf(poData, ImemptrHolder.class).booleanValue())
             {
                object<? extends ImemptrHolder> oIMemptr = ObjectOps.cast(poData, ImemptrHolder.class);
                mptr.assign(oIMemptr.ref().getValue());
                returnNormal(this.write(mptr));
             }
             else if (ObjectOps.typeOf(poData, Imap.class).booleanValue())
             {
                object<? extends JsonObject> oJsonObj = ObjectOps.newInstance(JsonObject.class);
                object<? extends Imap> oMap = ObjectOps.cast(poData, Imap.class);
                object<? extends Iiterator> oIterator = oMap.ref().getEntrySet().ref().iterator();

                while (oIterator.ref().hasNext().booleanValue())
                {
                   object<? extends LegacyMapEntry> oMapEntry = ObjectOps.cast(oIterator.ref().next_(), LegacyMapEntry.class);

                   object<? extends _BaseObject_> oKey = oMapEntry.ref().getKey();
                   object<? extends _BaseObject_> oVal = oMapEntry.ref().getValue();

                   // TODO: value should be converted to something more than strings...
                   if (oKey._isValid())
                   {
                      if (oVal._isValid())
                      {
                         oJsonObj.ref().add(oKey.ref().toLegacyString(), oVal.ref().toLegacyString());
                      }
                      else
                      {
                         oJsonObj.ref().addNull(oKey.ref().toLegacyString());
                      }
                   }
                }

                returnNormal(this.write(oJsonObj));
             }
             else if (ObjectOps.typeOf(poData, Icollection.class).booleanValue())
             {
                object<? extends JsonArray> oJson = ObjectOps.newInstance(JsonArray.class);
                object<? extends Icollection> oCol = ObjectOps.cast(poData, Icollection.class);
                object<? extends Iiterator> oIterator = oCol.ref().iterator();

                while (oIterator.ref().hasNext().booleanValue())
                {
                   object<? extends _BaseObject_> item = oIterator.ref().next_();

                   if (item._isValid())
                   {
                      oJson.ref().add(item.ref().toLegacyString());
                   }
                   else
                   {
                      oJson.ref().addNull();
                   }
                }

                returnNormal(this.write(oJson));
             }
             else if (ObjectOps.typeOf(poData, JsonConstruct.class).booleanValue())
             {
                object<? extends JsonConstruct> oJsonConstr = ObjectOps.cast(poData, JsonConstruct.class);

                oJsonConstr.ref().write(mptr);
                returnNormal(write(mptr));
             }
             else
             {
                String msg = String.format("JsonBodyWriter cannot convert object type %s to JSON",
                         poData.ref().getLegacyClass().ref().getTypeName().toStringMessage());
                undoThrow(AppError.newInstance(msg, 0));
             }
          }, (Fini) () -> {
             mptr.setLength(0);
          }));
       }

       /**
        * Write data to/from the object array
        *
        * @param poData data to be written
        *
        * @return number of bytes written
        */
       @LegacySignature(returns = "INT64", type = Type.METHOD, name = "Write", parameters =
       {
          @LegacyParameter(name = "poData", type = "OBJECT",
                qualified = "progress.lang.object", extent = -1, mode = "INPUT")
       })
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_FULL)
       public int64 write(object<? extends _BaseObject_>[] poData)
       {
          return function(this, "Write", int64.class, new Block((Body) () -> {
             if (poData.length == 0)
             {
                returnNormal(write(new object()));
             }
             else
             {
                object<? extends JsonArray> oJson = ObjectOps.newInstance(JsonArray.class);

                for (int i = 0; i < poData.length; i++)
                {
                   if (poData[i]._isValid())
                   {
                      oJson.ref().add(poData[i].ref().toLegacyString());
                   }
                   else
                   {
                      oJson.ref().addNull();
                   }
                }

                returnNormal(write(oJson));
             }
          }));
       }
    }