add custom multicolumn processing

backend/src/main/java/ru/micord/ervu_dashboard/service/ExportGridV2Service.java

@@ -1,6 +1,7 @@
 package ru.micord.ervu_dashboard.service;
 
 import model.FileModel;
+import model.column.GridDisplayColumn;
 import model.grid.GridColumnAggregationValues;
 import model.grid.GridDataExportFormat;
 import model.grid.GridRow;
@@ -8,18 +9,25 @@ import model.grid.GridRows;
 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 import org.apache.poi.ss.usermodel.*;
 import org.apache.poi.xssf.streaming.SXSSFWorkbook;
+import org.springframework.web.util.HtmlUtils;
+import property.enums.GridDisplayType;
+import property.grid.Formatter;
 import property.grid.GridColumn;
+import ru.cg.webbpm.modules.database.bean.entity_graph.EntityColumn;
 import service.GridV2ServiceImpl;
+import utils.ComplexColumnUtils;
+import utils.GridUtils;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
-import java.util.Base64;
+import java.util.*;
-import java.util.Date;
+import java.util.stream.Collectors;
-import java.util.List;
 
+//todo: Убрать этот костыльный сервис, обсудить и реализовать аналогичную логику в платформе
 public class ExportGridV2Service extends GridV2ServiceImpl {
 
     protected FileModel getFileModelWithContent(String[] columnIdsToExport,
@@ -173,4 +181,50 @@ public class ExportGridV2Service extends GridV2ServiceImpl {
         boldStyle.setAlignment(HorizontalAlignment.CENTER);
         return boldStyle;
     }
+
+    @Override
+    protected Map.Entry<String, Object> getValueEntry(GridColumn column, Map<EntityColumn, Object> columnToDataMap) {
+        if (column.isMultiColumn()) {
+            return getEntryFromMultiColumn(column, columnToDataMap);
+        }
+        else return super.getValueEntry(column, columnToDataMap);
+
+    }
+
+    private Map.Entry<String, Object> getEntryFromMultiColumn(final GridColumn column,
+                                                              final Map<EntityColumn, Object> columnToDataMap) {
+        String multiColumnName = evaluateMultiColumnName(column);
+        String multiColumnValue = evaluateMultiColumnValue(column, columnToDataMap);
+        return new AbstractMap.SimpleEntry<>(multiColumnName, multiColumnValue);
+    }
+
+    private String evaluateMultiColumnName(final GridColumn column) {
+        List<EntityColumn> entityColumns = Arrays.stream(column.displayColumns)
+                .map(GridDisplayColumn::getEntityColumn)
+                .collect(Collectors.toList());
+        return GridUtils.toGridColumnName(entityColumns, GridDisplayType.MULTI_COLUMN);
+    }
+
+    private String evaluateMultiColumnValue(final GridColumn column,
+                                            final Map<EntityColumn, Object> columnToDataMap) {
+        GridDisplayColumn[] displayColumns = column.displayColumns;
+        return Arrays.stream(displayColumns)
+                .map(displayColumn -> getMultiColFormattedValue(displayColumn, columnToDataMap))
+                .filter(value -> !value.equals(""))
+                .findFirst()
+                .orElse(null);
+    }
+
+    private String getMultiColFormattedValue(final GridDisplayColumn column,
+                                             final Map<EntityColumn, Object> columnToDataMap) {
+        EntityColumn entityColumn = column.getEntityColumn();
+        Object formattedValue = GridUtils.getFormattedValue(
+                columnToDataMap.get(entityColumn), entityColumn.getType(), column.getFormatter()
+        );
+        String formattedResult = formattedValue == null || formattedValue.equals("")
+                ? column.getEmptyValue()
+                : column.getPrefix() + formattedValue + column.getPostfix();
+        return HtmlUtils.htmlEscape(formattedResult, StandardCharsets.UTF_8.name());
+    }
+
 }