No-parse JSON prettify (#80)

* Multiple recursive rendering

* Added custom JSON prettify that doesn't require parsing to JS

* Fixed spacing issues

app/common/__tests__/render.test.js

@@ -71,7 +71,34 @@ describe('buildRenderContext()', () => {
 
     const context = renderUtils.buildRenderContext(ancestors);
 
-    expect(context).toEqual({recursive: '{{ recursive }}/hello/hello'});
+    // This is longer than 3 because it multiplies every time (1 -> 2 -> 4 -> 8)
+    expect(context).toEqual({
+      recursive: '{{ recursive }}/hello/hello/hello/hello/hello/hello/hello/hello'
+    });
+  });
+
+  it('render up to 3 recursion levels', () => {
+    const ancestors = [{
+      // Sub Environment
+      type: models.requestGroup.type,
+      environment: {
+        d: '/d',
+        c: '/c{{ d }}',
+        b: '/b{{ c }}',
+        a: '/a{{ b }}',
+        test: 'http://insomnia.rest{{ a }}'
+      }
+    }];
+
+    const context = renderUtils.buildRenderContext(ancestors);
+
+    expect(context).toEqual({
+      d: '/d',
+      c: '/c/d',
+      b: '/b/c/d',
+      a: '/a/b/c/d',
+      test: 'http://insomnia.rest/a/b/c/d',
+    });
   });
 
   it('rendered sibling environment variables', () => {

app/common/prettify.js

@@ -0,0 +1,97 @@
+/**
+ * Format a JSON string without parsing it as JavaScript.
+ *
+ * Code taken from jsonlint (http://zaa.ch/jsonlint/)
+ *
+ * @param json
+ * @param indentChars
+ * @returns {string}
+ */
+export function prettifyJson (json, indentChars) {
+  let i = 0;
+  let il = json.length;
+  let tab = (typeof indentChars !== 'undefined') ? indentChars : '    ';
+  let newJson = '';
+  let indentLevel = 0;
+  let inString = false;
+  let currentChar = null;
+  let previousChar = null;
+  let nextChar = null;
+
+  for (;i < il; i += 1) {
+    currentChar = json.charAt(i);
+    previousChar = json.charAt(i - 1);
+    nextChar = json.charAt(i + 1);
+
+    switch (currentChar) {
+      case '{':
+        if (!inString && nextChar !== '}') {
+          newJson += currentChar + '\n' + _repeatString(tab, indentLevel + 1);
+          indentLevel += 1;
+        } else {
+          newJson += currentChar;
+        }
+        break;
+      case '[':
+        if (!inString && nextChar !== ']') {
+          newJson += currentChar + '\n' + _repeatString(tab, indentLevel + 1);
+          indentLevel += 1;
+        } else {
+          newJson += currentChar;
+        }
+        break;
+      case '}':
+        if (!inString && previousChar !== '{') {
+          indentLevel -= 1;
+          newJson += '\n' + _repeatString(tab, indentLevel) + currentChar;
+        } else {
+          newJson += currentChar;
+        }
+        break;
+      case ']':
+        if (!inString && previousChar !== '[') {
+          indentLevel -= 1;
+          newJson += '\n' + _repeatString(tab, indentLevel) + currentChar;
+        } else {
+          newJson += currentChar;
+        }
+        break;
+      case ',':
+        if (!inString) {
+          newJson += ',\n' + _repeatString(tab, indentLevel);
+        } else {
+          newJson += currentChar;
+        }
+        break;
+      case ':':
+        if (!inString) {
+          newJson += ': ';
+        } else {
+          newJson += currentChar;
+        }
+        break;
+      case ' ':
+      case '\n':
+      case '\t':
+        if (inString) {
+          newJson += currentChar;
+        }
+        break;
+      case '"':
+        if (i > 0 && previousChar !== '\\') {
+          inString = !inString;
+        }
+        newJson += currentChar;
+        break;
+      default:
+        newJson += currentChar;
+        break;
+    }
+  }
+
+  return newJson;
+}
+
+function _repeatString(s, count) {
+  return new Array(count + 1).join(s);
+}

app/common/render.js

@@ -92,7 +92,14 @@ export function buildRenderContext (ancestors, rootEnvironment, subEnvironment)
   }
 
   // Render the context with itself to fill in the rest.
-  return recursiveRender(renderContext, renderContext);
+  let finalRenderContext = renderContext;
+
+  // Render up to 5 levels of recursive references.
+  for (let i = 0; i < 3; i++) {
+    finalRenderContext = recursiveRender(finalRenderContext, finalRenderContext);
+  }
+
+  return finalRenderContext;
 }
 
 export function recursiveRender (obj, context) {

app/ui/components/base/Editor.js

@@ -49,6 +49,7 @@ import * as misc from '../../../common/misc';
 import {trackEvent} from '../../../analytics/index';
 // Make jsonlint available to the jsonlint plugin
 import {parser as jsonlint} from 'jsonlint';
+import {prettifyJson} from '../../../common/prettify';
 global.jsonlint = jsonlint;
 
 
@@ -170,36 +171,37 @@ class Editor extends Component {
     this._prettify(this.codeMirror.getValue());
   }
 
-  async _prettify (code) {
+  _prettify (code) {
     if (this._isXML(this.props.mode)) {
-      code = this._formatXML(code);
+      code = this._prettifyXML(code);
     } else {
-      code = this._formatJSON(code);
+      code = this._prettifyJSON(code);
     }
 
     this.codeMirror.setValue(code);
   }
 
-  _formatJSON (code) {
+  _prettifyJSON (code) {
     try {
-      let obj = JSON.parse(code);
+      let jsonString = code;
 
       if (this.props.updateFilter && this.state.filter) {
+        let obj = JSON.parse(code);
         try {
-          obj = jq.query(obj, this.state.filter);
+          jsonString = JSON.stringify(jq.query(obj, this.state.filter));
         } catch (err) {
-          obj = '[]';
+          jsonString = '[]';
         }
       }
 
-      return vkBeautify.json(obj, '\t');
+      return prettifyJson(jsonString, '\t');
     } catch (e) {
       // That's Ok, just leave it
       return code;
     }
   }
 
-  _formatXML (code) {
+  _prettifyXML (code) {
     if (this.props.updateFilter && this.state.filter) {
       try {
         const dom = new DOMParser().parseFromString(code);