Refactor metadata on tableresult by header

api/src/engine/connectors/exareme/transformations.ts

 // This file contains all transformation queries for JSONata
 // see : https://docs.jsonata.org/
 
-import * as jsonata from 'jsonata'; // old import style needed because of 'export = jsonata'
+import * as jsonata from 'jsonata'; // old import style needed due to 'export = jsonata'
 
 export const transientToTable = jsonata(`
 ( 
-  $e := function($x) {(
-      ($x != null) ? $x : ''
-  )};
+    $e := function($x, $r) {($x != null) ? $x : ($r ? $r : '')};
 
-  $fn := function($o, $prefix) { 
-      $each($o, function($v, $k) {(
-          $name := $join([$prefix,$k], '/');
-          $type($v) = 'object' ? $fn($v, $name): {
-              $name: $v
-          }
-      )}) ~> $merge()
-  };
+    $fn := function($o, $prefix) {
+        $type($o) = 'object' ? 
+        $each($o, function($v, $k) {(
+            $type($v) = 'object' ? { $k: $v.count & ' (' & $v.percentage & '%)' } : {
+                $k: $v
+            }
+        )}) ~> $merge()
+        : {}
+    };
 
-  result.data.[
-      $.single.*@$p#$i.{
-          'groupBy' : 'single',
-          'name': $keys(%)[$i],
-          'metadatas': $append("", $keys(*)).{
-              'name': $,
-              'type': 'string'
-          },
-          'data' : [
-              [$keys(%)[$i], $p.*.($e(num_total))],
-              ['Datapoints', $p.*.($e(num_datapoints))],
-              ['Nulls', $p.*.($e(num_nulls))],
-              $p.*.data.($fn($)) ~> $reduce(function($a, $b) {
-                  $each($a, function($v, $k) {(
-                      $val := $lookup($b,$k);
-                      {
-                          $k : [$v, ($val != null) ? $val : '']
-                      }
-                  )}) ~> $merge()
-              }) ~> $each(function($v, $k) {$append($k,$v)}) 
-          ]
-      }
-  ]
+    result.data.[
+        $.single.*@$p#$i.{
+            'groupBy' : 'single',
+            'name': $keys(%)[$i],
+            'metadatas': $append("", $keys(*)).{
+                'name': $,
+                'type': 'string'
+            },
+            'data' : [
+                [$keys(%)[$i], $p.*.($e(num_total))],
+                ['Datapoints', $p.*.($e(num_datapoints))],
+                ['Nulls', $p.*.($e(num_nulls))],
+                $p.*.data.($fn($)) ~> $reduce(function($a, $b) {
+                    $each($a, function($v, $k) {(
+                        {
+                            $k : [$v, $e($lookup($b,$k), "No data")]
+                        }
+                    )}) ~> $merge()
+                }) ~> $each(function($v, $k) {$append($k,$v)})
+            ]
+        }
+    ]
 )
 `);

api/src/engine/models/result/common/metadata.model.ts → api/src/engine/models/result/common/header.model.ts

 import { Field, ObjectType } from '@nestjs/graphql';
 
 @ObjectType()
-export class MetaData {
+export class Header {
   @Field()
   name: string;
 

api/src/engine/models/result/table-result.model.ts

 import { Field, ObjectType } from '@nestjs/graphql';
-import { MetaData } from './common/metadata.model';
+import { Header } from './common/header.model';
 import { Result } from './common/result.model';
 
 @ObjectType()
@@ -10,6 +10,6 @@ export class TableResult extends Result {
   @Field(() => [[String]])
   data: string[][];
 
-  @Field(() => [MetaData])
-  metadatas: MetaData[];
+  @Field(() => [Header])
+  headers: Header[];
 }

api/src/schema.gql

@@ -34,7 +34,7 @@ type Domain {
   rootGroup: Group!
 }
 
-type MetaData {
+type Header {
   name: String!
   type: String!
 }
@@ -59,7 +59,7 @@ type TableResult {
   groupBy: String
   name: String!
   data: [[String!]!]!
-  metadatas: [MetaData!]!
+  headers: [Header!]!
 }
 
 type DummyResult {