Define InlineMarkdown scalar

Author: CarsonF

src/common/markdown.scalar.ts

@@ -0,0 +1,24 @@
+import { CustomScalar, Scalar } from '@nestjs/graphql';
+import { GraphQLError, Kind, ValueNode } from 'graphql';
+
+@Scalar('InlineMarkdown')
+export class InlineMarkdownScalar
+  implements CustomScalar<string, string | null>
+{
+  description = 'A string that holds inline Markdown formatted text';
+
+  parseLiteral(ast: ValueNode): string | null {
+    if (ast.kind !== Kind.STRING) {
+      throw new GraphQLError(
+        `Can only validate strings as InlineMarkdown but got a: ${ast.kind}`,
+      );
+    }
+    return ast.value;
+  }
+  parseValue(value: any) {
+    return value;
+  }
+  serialize(value: any) {
+    return value;
+  }
+}

src/common/scalars.ts

@@ -3,6 +3,7 @@ import { CustomScalar } from '@nestjs/graphql';
 import { GraphQLScalarType } from 'graphql';
 import UploadScalar from 'graphql-upload/GraphQLUpload.mjs';
 import { DateScalar, DateTimeScalar } from './luxon.graphql';
+import { InlineMarkdownScalar } from './markdown.scalar';
 import { RichTextScalar } from './rich-text.scalar';
 import { UrlScalar } from './url.field';
 
@@ -15,4 +16,5 @@ export const getRegisteredScalars = (): Scalar[] => [
   RichTextScalar,
   UploadScalar,
   UrlScalar,
+  InlineMarkdownScalar,
 ];