Implement eager load relations on graphqlQueries (#4391)

* Implement eager load relations on graphqlQueries

* Fix tests

* Fixes

* Fixes

packages/twenty-front/src/modules/object-metadata/utils/mapFieldMetadataToGraphQLQuery.ts

@@ -0,0 +1,112 @@
+import { isUndefined } from '@sniptt/guards';
+
+import { ObjectMetadataItem } from '@/object-metadata/types/ObjectMetadataItem';
+import { mapObjectMetadataToGraphQLQuery } from '@/object-metadata/utils/mapObjectMetadataToGraphQLQuery';
+import { FieldMetadataType } from '~/generated-metadata/graphql';
+
+import { FieldMetadataItem } from '../types/FieldMetadataItem';
+
+export const mapFieldMetadataToGraphQLQuery = ({
+  objectMetadataItems,
+  field,
+  relationFieldDepth = 0,
+  relationFieldEagerLoad,
+}: {
+  objectMetadataItems: ObjectMetadataItem[];
+  field: Pick<
+    FieldMetadataItem,
+    'name' | 'type' | 'toRelationMetadata' | 'fromRelationMetadata'
+  >;
+  relationFieldDepth?: number;
+  relationFieldEagerLoad?: Record<string, any>;
+}): any => {
+  const fieldType = field.type;
+
+  const fieldIsSimpleValue = (
+    [
+      'UUID',
+      'TEXT',
+      'PHONE',
+      'DATE_TIME',
+      'EMAIL',
+      'NUMBER',
+      'BOOLEAN',
+      'RATING',
+      'SELECT',
+      'POSITION',
+    ] as FieldMetadataType[]
+  ).includes(fieldType);
+
+  if (fieldIsSimpleValue) {
+    return field.name;
+  } else if (
+    fieldType === 'RELATION' &&
+    field.toRelationMetadata?.relationType === 'ONE_TO_MANY' &&
+    relationFieldDepth > 0
+  ) {
+    const relationMetadataItem = objectMetadataItems.find(
+      (objectMetadataItem) =>
+        objectMetadataItem.id ===
+        (field.toRelationMetadata as any)?.fromObjectMetadata?.id,
+    );
+
+    if (isUndefined(relationMetadataItem)) {
+      return '';
+    }
+
+    return `${field.name}
+${mapObjectMetadataToGraphQLQuery({
+  objectMetadataItems,
+  objectMetadataItem: relationMetadataItem,
+  eagerLoadedRelations: relationFieldEagerLoad,
+  depth: relationFieldDepth - 1,
+})}`;
+  } else if (
+    fieldType === 'RELATION' &&
+    field.fromRelationMetadata?.relationType === 'ONE_TO_MANY' &&
+    relationFieldDepth > 0
+  ) {
+    const relationMetadataItem = objectMetadataItems.find(
+      (objectMetadataItem) =>
+        objectMetadataItem.id ===
+        (field.fromRelationMetadata as any)?.toObjectMetadata?.id,
+    );
+
+    if (isUndefined(relationMetadataItem)) {
+      return '';
+    }
+
+    return `${field.name}
+{
+  edges {
+    node ${mapObjectMetadataToGraphQLQuery({
+      objectMetadataItems,
+      objectMetadataItem: relationMetadataItem,
+      eagerLoadedRelations: relationFieldEagerLoad,
+      depth: relationFieldDepth - 1,
+    })}
+  }
+}`;
+  } else if (fieldType === 'LINK') {
+    return `${field.name}
+{
+  label
+  url
+}`;
+  } else if (fieldType === 'CURRENCY') {
+    return `${field.name}
+{
+  amountMicros
+  currencyCode
+}
+    `;
+  } else if (fieldType === 'FULL_NAME') {
+    return `${field.name}
+{
+  firstName
+  lastName
+}`;
+  }
+
+  return '';
+};