Initialisation

Added the packages and files for the backend server

node_modules/graphql/language/source.mjs

@@ -0,0 +1,50 @@
+import { devAssert } from '../jsutils/devAssert.mjs';
+import { inspect } from '../jsutils/inspect.mjs';
+import { instanceOf } from '../jsutils/instanceOf.mjs';
+
+/**
+ * A representation of source input to GraphQL. The `name` and `locationOffset` parameters are
+ * optional, but they are useful for clients who store GraphQL documents in source files.
+ * For example, if the GraphQL input starts at line 40 in a file named `Foo.graphql`, it might
+ * be useful for `name` to be `"Foo.graphql"` and location to be `{ line: 40, column: 1 }`.
+ * The `line` and `column` properties in `locationOffset` are 1-indexed.
+ */
+export class Source {
+  constructor(
+    body,
+    name = 'GraphQL request',
+    locationOffset = {
+      line: 1,
+      column: 1,
+    },
+  ) {
+    typeof body === 'string' ||
+      devAssert(false, `Body must be a string. Received: ${inspect(body)}.`);
+    this.body = body;
+    this.name = name;
+    this.locationOffset = locationOffset;
+    this.locationOffset.line > 0 ||
+      devAssert(
+        false,
+        'line in locationOffset is 1-indexed and must be positive.',
+      );
+    this.locationOffset.column > 0 ||
+      devAssert(
+        false,
+        'column in locationOffset is 1-indexed and must be positive.',
+      );
+  }
+
+  get [Symbol.toStringTag]() {
+    return 'Source';
+  }
+}
+/**
+ * Test if the given value is a Source object.
+ *
+ * @internal
+ */
+
+export function isSource(source) {
+  return instanceOf(source, Source);
+}