report update, handle no row return

src/main/java/com/ffii/tsms/modules/report/service/ReportService.kt

@@ -1505,27 +1505,31 @@ open class ReportService(
         lateStartData: List<Map<String, Any>>,
         evaluator: FormulaEvaluator
     ) {
-        var dataRowIndex = 6  // Start populating data from row index 7
+        var dataRowIndex = 6
+
+        // Populate the rows with data from the database
         lateStartData.forEachIndexed { index, data ->
             val row = sheet.getRow(dataRowIndex) ?: sheet.createRow(dataRowIndex)
             populateDataRow(workbook, sheet, row, data, index)
             dataRowIndex++
         }
 
-        // Update and apply conditional formatting to highlight specific values in column J
-        val sheetCF = sheet.sheetConditionalFormatting
-        val rule1 = sheetCF.createConditionalFormattingRule("J7 < 60")
-        val pattern1 = rule1.createPatternFormatting().apply {
-            fillBackgroundColor = IndexedColors.RED.index
-            fillPattern = PatternFormatting.SOLID_FOREGROUND
-        }
-        val rule2 = sheetCF.createConditionalFormattingRule("J7 >= 60")
-        val pattern2 = rule2.createPatternFormatting().apply {
-            fillBackgroundColor = IndexedColors.YELLOW.index
-            fillPattern = PatternFormatting.SOLID_FOREGROUND
-        }
-        val region = CellRangeAddress(dataRowIndex - lateStartData.size, dataRowIndex - 1, 9, 9) // Column J
-        sheetCF.addConditionalFormatting(arrayOf(region), arrayOf(rule1, rule2))
+        // Only apply conditional formatting if there is data
+        if (lateStartData.isNotEmpty()) {
+            val sheetCF = sheet.sheetConditionalFormatting
+            val rule1 = sheetCF.createConditionalFormattingRule("J7 < 60")
+            val pattern1 = rule1.createPatternFormatting().apply {
+                fillBackgroundColor = IndexedColors.RED.index
+                fillPattern = PatternFormatting.SOLID_FOREGROUND
+            }
+            val rule2 = sheetCF.createConditionalFormattingRule("J7 >= 60")
+            val pattern2 = rule2.createPatternFormatting().apply {
+                fillBackgroundColor = IndexedColors.YELLOW.index
+                fillPattern = PatternFormatting.SOLID_FOREGROUND
+            }
+            val region = CellRangeAddress(6, dataRowIndex - 1, 9, 9) // Column J
+            sheetCF.addConditionalFormatting(arrayOf(region), arrayOf(rule1, rule2))
+        }
     }
 
     // Sets team and client IDs in the sheet to manage data visibility based on the selected team and client