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CE-881 - Support multiple views

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This commit is contained in:
darin.kelkhoff
2024-04-01 08:57:33 -05:00
parent 050d102efe
commit 4d4405ec32
1 changed files with 175 additions and 9 deletions
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184
qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/actions/reporting/JsonExportStreamer.java
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@ -26,12 +26,14 @@ import java.io.IOException;
import java.io.OutputStream;
import java.io.Serializable;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import com.kingsrook.qqq.backend.core.exceptions.QReportingException;
import com.kingsrook.qqq.backend.core.logging.QLogger;
import com.kingsrook.qqq.backend.core.model.actions.reporting.ExportInput;
import com.kingsrook.qqq.backend.core.model.actions.reporting.ReportDestination;
import com.kingsrook.qqq.backend.core.model.data.QRecord;
import com.kingsrook.qqq.backend.core.model.metadata.fields.QFieldMetaData;
import com.kingsrook.qqq.backend.core.model.metadata.reporting.QReportView;
@ -47,13 +49,20 @@ public class JsonExportStreamer implements ExportStreamerInterface
{
private static final QLogger LOG = QLogger.getLogger(JsonExportStreamer.class);
private boolean prettyPrint = true;
private ExportInput exportInput;
private QTableMetaData table;
private List<QFieldMetaData> fields;
private OutputStream outputStream;
private boolean needComma = false;
private boolean prettyPrint = true;
private boolean multipleViews = false;
private boolean haveStartedAnyViews = false;
private boolean needCommaBeforeRecord = false;
private byte[] indent = new byte[0];
private String indentString = "";
@ -66,6 +75,37 @@ public class JsonExportStreamer implements ExportStreamerInterface
/*******************************************************************************
**
*******************************************************************************/
@Override
public void preRun(ReportDestination reportDestination, List<QReportView> views) throws QReportingException
{
outputStream = reportDestination.getReportOutputStream();
if(views.size() > 1)
{
multipleViews = true;
}
if(multipleViews)
{
try
{
indentIfPretty(outputStream);
outputStream.write('[');
newlineIfPretty(outputStream);
increaseIndent();
}
catch(IOException e)
{
throw (new QReportingException("Error starting report output", e));
}
}
}
/*******************************************************************************
**
*******************************************************************************/
@ -75,16 +115,88 @@ public class JsonExportStreamer implements ExportStreamerInterface
this.exportInput = exportInput;
this.fields = fields;
table = exportInput.getTable();
outputStream = this.exportInput.getReportDestination().getReportOutputStream();
needCommaBeforeRecord = false;
try
{
if(multipleViews)
{
if(haveStartedAnyViews)
{
/////////////////////////
// close the last view //
/////////////////////////
newlineIfPretty(outputStream);
decreaseIndent();
indentIfPretty(outputStream);
outputStream.write(']');
newlineIfPretty(outputStream);
decreaseIndent();
indentIfPretty(outputStream);
outputStream.write('}');
outputStream.write(',');
newlineIfPretty(outputStream);
}
/////////////////////////////////////////////////////////////
// open a new view, as an object, with a name & data entry //
/////////////////////////////////////////////////////////////
indentIfPretty(outputStream);
outputStream.write('{');
newlineIfPretty(outputStream);
increaseIndent();
indentIfPretty(outputStream);
outputStream.write(String.format("""
"name":"%s",""", label).getBytes(StandardCharsets.UTF_8));
newlineIfPretty(outputStream);
indentIfPretty(outputStream);
outputStream.write("""
"data":""".getBytes(StandardCharsets.UTF_8));
newlineIfPretty(outputStream);
}
//////////////////////////////////////////////
// start the array of entries for this view //
//////////////////////////////////////////////
indentIfPretty(outputStream);
outputStream.write('[');
increaseIndent();
}
catch(IOException e)
{
throw (new QReportingException("Error starting report output", e));
}
haveStartedAnyViews = true;
}
/*******************************************************************************
**
*******************************************************************************/
private void increaseIndent()
{
indent = new byte[indent.length + 3];
Arrays.fill(indent, (byte) ' ');
indentString = new String(indent);
}
/*******************************************************************************
**
*******************************************************************************/
private void decreaseIndent()
{
indent = new byte[Math.max(0, indent.length - 3)];
Arrays.fill(indent, (byte) ' ');
indentString = new String(indent);
}
@ -112,7 +224,7 @@ public class JsonExportStreamer implements ExportStreamerInterface
{
try
{
if(needComma)
if(needCommaBeforeRecord)
{
outputStream.write(',');
}
@ -125,16 +237,21 @@ public class JsonExportStreamer implements ExportStreamerInterface
}
String json = prettyPrint ? JsonUtils.toPrettyJson(mapForJson) : JsonUtils.toJson(mapForJson);
if(prettyPrint)
{
json = json.replaceAll("(?s)\n", "\n" + indentString);
}
if(prettyPrint)
{
outputStream.write('\n');
}
indentIfPretty(outputStream);
outputStream.write(json.getBytes(StandardCharsets.UTF_8));
outputStream.flush(); // todo - less often?
needComma = true;
needCommaBeforeRecord = true;
}
catch(Exception e)
{
@ -163,11 +280,34 @@ public class JsonExportStreamer implements ExportStreamerInterface
{
try
{
if(prettyPrint)
{
outputStream.write('\n');
}
//////////////////////////////////////////////
// close the array of entries for this view //
//////////////////////////////////////////////
newlineIfPretty(outputStream);
decreaseIndent();
indentIfPretty(outputStream);
outputStream.write(']');
newlineIfPretty(outputStream);
if(multipleViews)
{
////////////////////////////////////////////
// close this view, if there are multiple //
////////////////////////////////////////////
decreaseIndent();
indentIfPretty(outputStream);
outputStream.write('}');
newlineIfPretty(outputStream);
/////////////////////////////
// close the list of views //
/////////////////////////////
decreaseIndent();
indentIfPretty(outputStream);
outputStream.write(']');
newlineIfPretty(outputStream);
}
}
catch(IOException e)
{
@ -175,4 +315,30 @@ public class JsonExportStreamer implements ExportStreamerInterface
}
}
/*******************************************************************************
**
*******************************************************************************/
private void newlineIfPretty(OutputStream outputStream) throws IOException
{
if(prettyPrint)
{
outputStream.write('\n');
}
}
/*******************************************************************************
**
*******************************************************************************/
private void indentIfPretty(OutputStream outputStream) throws IOException
{
if(prettyPrint)
{
outputStream.write(indent);
}
}
}