From 0cffb60812211989c172dc8c58b43e4589c86868 Mon Sep 17 00:00:00 2001
From: Yevgenii Mikhnytskyi <todesstoss@gmail.com>
Date: Fri, 16 Jul 2021 17:10:27 +0300
Subject: [PATCH] Fix getRef on encoded  path, issue:
 https://github.com/ferdikoomen/openapi-typescript-codegen/issues/791

---
 .../v2/parser/getOperationParameterName.ts    |  3 ++-
 .../v3/parser/getOperationParameterName.ts    |  3 ++-
 src/openApi/v3/parser/getRef.spec.ts          | 24 +++++++++++++++++++
 src/openApi/v3/parser/getRef.ts               |  4 ++++
 4 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/src/openApi/v2/parser/getOperationParameterName.ts b/src/openApi/v2/parser/getOperationParameterName.ts
index e21e83c8..0954d736 100644
--- a/src/openApi/v2/parser/getOperationParameterName.ts
+++ b/src/openApi/v2/parser/getOperationParameterName.ts
@@ -1,6 +1,7 @@
 import camelCase from 'camelcase';
 
-const reservedWords = /^(arguments|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|eval|export|extends|false|finally|for|function|if|implements|import|in|instanceof|interface|let|new|null|package|private|protected|public|return|static|super|switch|this|throw|true|try|typeof|var|void|while|with|yield)$/g;
+const reservedWords =
+    /^(arguments|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|eval|export|extends|false|finally|for|function|if|implements|import|in|instanceof|interface|let|new|null|package|private|protected|public|return|static|super|switch|this|throw|true|try|typeof|var|void|while|with|yield)$/g;
 
 /**
  * Replaces any invalid characters from a parameter name.
diff --git a/src/openApi/v3/parser/getOperationParameterName.ts b/src/openApi/v3/parser/getOperationParameterName.ts
index e21e83c8..0954d736 100644
--- a/src/openApi/v3/parser/getOperationParameterName.ts
+++ b/src/openApi/v3/parser/getOperationParameterName.ts
@@ -1,6 +1,7 @@
 import camelCase from 'camelcase';
 
-const reservedWords = /^(arguments|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|eval|export|extends|false|finally|for|function|if|implements|import|in|instanceof|interface|let|new|null|package|private|protected|public|return|static|super|switch|this|throw|true|try|typeof|var|void|while|with|yield)$/g;
+const reservedWords =
+    /^(arguments|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|eval|export|extends|false|finally|for|function|if|implements|import|in|instanceof|interface|let|new|null|package|private|protected|public|return|static|super|switch|this|throw|true|try|typeof|var|void|while|with|yield)$/g;
 
 /**
  * Replaces any invalid characters from a parameter name.
diff --git a/src/openApi/v3/parser/getRef.spec.ts b/src/openApi/v3/parser/getRef.spec.ts
index ef641b44..4195e55b 100644
--- a/src/openApi/v3/parser/getRef.spec.ts
+++ b/src/openApi/v3/parser/getRef.spec.ts
@@ -34,4 +34,28 @@ describe('getRef', () => {
             type: 'integer',
         });
     });
+
+    it('should produce correct result for encoded ref path', () => {
+        expect(
+            getRef(
+                {
+                    openapi: '3.0',
+                    info: {
+                        title: 'dummy',
+                        version: '1.0',
+                    },
+                    paths: {
+                        '/api/user/{id}': {
+                            description: 'This is an Example path',
+                        },
+                    },
+                },
+                {
+                    $ref: '#/paths/~1api~1user~1%7Bid%7D',
+                }
+            )
+        ).toEqual({
+            description: 'This is an Example path',
+        });
+    });
 });
diff --git a/src/openApi/v3/parser/getRef.ts b/src/openApi/v3/parser/getRef.ts
index 3fa53d22..3fde117f 100644
--- a/src/openApi/v3/parser/getRef.ts
+++ b/src/openApi/v3/parser/getRef.ts
@@ -1,6 +1,9 @@
 import type { OpenApi } from '../interfaces/OpenApi';
 import type { OpenApiReference } from '../interfaces/OpenApiReference';
 
+const escapedSlash = /~1/g;
+const escapedTilde = /~0/g;
+
 export function getRef<T>(openApi: OpenApi, item: T & OpenApiReference): T {
     if (item.$ref) {
         // Fetch the paths to the definitions, this converts:
@@ -14,6 +17,7 @@ export function getRef<T>(openApi: OpenApi, item: T & OpenApiReference): T {
         // if we cannot find it, then we throw an error.
         let result: any = openApi;
         paths.forEach((path: string): void => {
+            path = decodeURIComponent(path.replace(escapedSlash, '/').replace(escapedTilde, '~'));
             if (result.hasOwnProperty(path)) {
                 result = result[path];
             } else {