feat: Add row parser (#644)

* feat: adding explore table data source

* refactor: revert changes

* feat: adding a shareable explore value parser

* refactor: addressing comments

* feat: adding a row parser

* refactor: addressing comments

* refactor: remove row parser

Author: anandtiwary

projects/components/src/table/cells/data-parsers/table-cell-string-parser.ts

@@ -1,16 +1,34 @@
+import { MetricAggregation } from '@hypertrace/distributed-tracing';
 import { TableCellParser } from '../table-cell-parser';
 import { TableCellParserBase } from '../table-cell-parser-base';
 import { CoreTableCellParserType } from '../types/core-table-cell-parser-type';
 
 @TableCellParser({
   type: CoreTableCellParserType.String
 })
-export class TableCellStringParser extends TableCellParserBase<string, string, string> {
-  public parseValue(cellData: string): string {
-    return cellData;
+export class TableCellStringParser extends TableCellParserBase<string, CellValue, CellValue> {
+  public parseValue(cellData: CellData): CellValue {
+    return this.extractValue(cellData);
   }
 
-  public parseFilterValue(cellData: string): string {
+  private extractValue(cellData: CellData): CellValue {
+    switch (typeof cellData) {
+      case 'object':
+        return cellData?.value ?? undefined;
+      case 'string':
+      default:
+        return cellData;
+    }
+  }
+
+  public parseFilterValue(cellData: string): CellValue {
     return this.parseValue(cellData);
   }
 }
+
+type CellData = string | null | Partial<NullableValueMetricAggregation>;
+type CellValue = string | undefined;
+
+interface NullableValueMetricAggregation extends Omit<MetricAggregation, 'value'> {
+  value: string | null;
+}