From 19d80be10b284354c4aad9f741bb70befd46aacc Mon Sep 17 00:00:00 2001
From: Rikki Schulte <rikki.schulte@gmail.com>
Date: Sun, 31 Jan 2021 14:16:58 -0500
Subject: [PATCH] fix: fix block string parsing in language parser

---
 .../graphql-language-service-parser/src/Rules.ts     | 12 +++++++++++-
 .../src/onlineParser.ts                              | 10 ++++++++++
 .../graphql-language-service-parser/src/types.ts     |  1 +
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/packages/graphql-language-service-parser/src/Rules.ts b/packages/graphql-language-service-parser/src/Rules.ts
index feae5313bc9..efc9983b4e0 100644
--- a/packages/graphql-language-service-parser/src/Rules.ts
+++ b/packages/graphql-language-service-parser/src/Rules.ts
@@ -192,7 +192,17 @@ export const ParseRules: { [name: string]: ParseRule } = {
     }
   },
   NumberValue: [t('Number', 'number')],
-  StringValue: [t('String', 'string')],
+  StringValue: [
+    {
+      style: 'string',
+      match: token => token.kind === 'String',
+      update(state: State, token: Token) {
+        if (token.value.startsWith('"""')) {
+          state.inBlockstring = !token.value.slice(3).endsWith('"""');
+        }
+      },
+    },
+  ],
   BooleanValue: [t('Name', 'builtin')],
   NullValue: [t('Name', 'keyword')],
   EnumValue: [name('string-2')],
diff --git a/packages/graphql-language-service-parser/src/onlineParser.ts b/packages/graphql-language-service-parser/src/onlineParser.ts
index 24de5483a13..f1623c1f2ca 100644
--- a/packages/graphql-language-service-parser/src/onlineParser.ts
+++ b/packages/graphql-language-service-parser/src/onlineParser.ts
@@ -81,6 +81,16 @@ function getToken(
   state: State,
   options: ParserOptions,
 ): string {
+  if (state.inBlockstring) {
+    if (stream.match(/.*"""/)) {
+      state.inBlockstring = false;
+      return 'string';
+    } else {
+      stream.skipToEnd();
+      return 'string';
+    }
+  }
+
   const { lexRules, parseRules, eatWhitespace, editorConfig } = options;
   // Restore state after an empty-rule.
   if (state.rule && state.rule.length === 0) {
diff --git a/packages/graphql-language-service-parser/src/types.ts b/packages/graphql-language-service-parser/src/types.ts
index e924439c9cb..7c29c89a66d 100644
--- a/packages/graphql-language-service-parser/src/types.ts
+++ b/packages/graphql-language-service-parser/src/types.ts
@@ -52,6 +52,7 @@ export type State = {
   needsSeperator: boolean;
   needsAdvance?: boolean;
   indentLevel?: number;
+  inBlockstring?: boolean;
 };
 
 export const AdditionalRuleKinds: _AdditionalRuleKinds = {