feat: add sampleCollapseLevel option (#937)

* feat: add sampleCollapseLevel option

* fix: rename sampleCollapseLevel option to jsonSampleExpandLevel
Change README.md description

* fix: provide maxCollapseLevel option via argument

* fix: rename normalizer function and some vars

README.md

@@ -243,6 +243,7 @@ You can use all of the following options with standalone version on <redoc> tag
 * `hideDownloadButton` - do not show "Download" spec button. **THIS DOESN'T MAKE YOUR SPEC PRIVATE**, it just hides the button.
 * `disableSearch` - disable search indexing and search box
 * `onlyRequiredInSamples` - shows only required fields in request samples.
+* `jsonSampleExpandLevel` - set the default expand level for JSON payload samples (responses and request body). Special value 'all' expands all levels. The default value is `2`.
 * `theme` - ReDoc theme. Not documented yet. For details check source code: [theme.ts](https://github.com/Redocly/redoc/blob/master/src/theme.ts)
 
 ## Advanced usage of standalone version

src/components/JsonViewer/JsonViewer.tsx

@@ -5,6 +5,7 @@ import { SampleControls } from '../../common-elements';
 import { CopyButtonWrapper } from '../../common-elements/CopyButtonWrapper';
 import { PrismDiv } from '../../common-elements/PrismDiv';
 import { jsonToHTML } from '../../utils/jsonToHtml';
+import { OptionsContext } from '../OptionsProvider';
 import { jsonStyles } from './style';
 
 export interface JsonProps {
@@ -32,12 +33,18 @@ class Json extends React.PureComponent<JsonProps> {
         <span onClick={this.expandAll}> Expand all </span>
         <span onClick={this.collapseAll}> Collapse all </span>
       </SampleControls>
-      <PrismDiv
+      <OptionsContext.Consumer>
-        className={this.props.className}
+        {options => (
-        // tslint:disable-next-line
+          <PrismDiv
-        ref={node => (this.node = node!)}
+            className={this.props.className}
-        dangerouslySetInnerHTML={{ __html: jsonToHTML(this.props.data) }}
+            // tslint:disable-next-line
-      />
+            ref={node => (this.node = node!)}
+            dangerouslySetInnerHTML={{
+              __html: jsonToHTML(this.props.data, options.jsonSampleExpandLevel),
+            }}
+          />
+        )}
+      </OptionsContext.Consumer>
     </JsonViewerWrap>
   );
 

src/services/RedocNormalizedOptions.ts

@@ -22,6 +22,7 @@ export interface RedocRawOptions {
   onlyRequiredInSamples?: boolean | string;
   showExtensions?: boolean | string | string[];
   hideSingleRequestSampleTab?: boolean | string;
+  jsonSampleExpandLevel?: number | string | 'all';
 
   unstable_ignoreMimeParameters?: boolean;
 
@@ -111,6 +112,16 @@ export class RedocNormalizedOptions {
     return value;
   }
 
+  private static normalizeJsonSampleExpandLevel(level?: number | string | 'all'): number {
+    if (level === 'all') {
+      return +Infinity;
+    }
+    if (!isNaN(Number(level))) {
+      return Math.ceil(Number(level));
+    }
+    return 2;
+  }
+
   theme: ResolvedThemeInterface;
   scrollYOffset: () => number;
   hideHostname: boolean;
@@ -126,6 +137,7 @@ export class RedocNormalizedOptions {
   onlyRequiredInSamples: boolean;
   showExtensions: boolean | string[];
   hideSingleRequestSampleTab: boolean;
+  jsonSampleExpandLevel: number;
   enumSkipQuotes: boolean;
 
   /* tslint:disable-next-line */
@@ -158,6 +170,9 @@ export class RedocNormalizedOptions {
     this.onlyRequiredInSamples = argValueToBoolean(raw.onlyRequiredInSamples);
     this.showExtensions = RedocNormalizedOptions.normalizeShowExtensions(raw.showExtensions);
     this.hideSingleRequestSampleTab = argValueToBoolean(raw.hideSingleRequestSampleTab);
+    this.jsonSampleExpandLevel = RedocNormalizedOptions.normalizeJsonSampleExpandLevel(
+      raw.jsonSampleExpandLevel,
+    );
     this.enumSkipQuotes = argValueToBoolean(raw.enumSkipQuotes);
 
     this.unstable_ignoreMimeParameters = argValueToBoolean(raw.unstable_ignoreMimeParameters);

src/utils/jsonToHtml.ts

@@ -1,11 +1,10 @@
 let level = 1;
-const COLLAPSE_LEVEL = 2;
 
-export function jsonToHTML(json) {
+export function jsonToHTML(json, maxExpandLevel) {
   level = 1;
   let output = '';
   output += '<div class="redoc-json">';
-  output += valueToHTML(json);
+  output += valueToHTML(json, maxExpandLevel);
   output += '</div>';
   return output;
 }
@@ -33,20 +32,20 @@ function punctuation(val) {
   return '<span class="token punctuation">' + val + '</span>';
 }
 
-function valueToHTML(value) {
+function valueToHTML(value, maxExpandLevel: number) {
   const valueType = typeof value;
   let output = '';
   if (value === undefined || value === null) {
     output += decorateWithSpan('null', 'token keyword');
   } else if (value && value.constructor === Array) {
     level++;
-    output += arrayToHTML(value);
+    output += arrayToHTML(value, maxExpandLevel);
     level--;
   } else if (value && value.constructor === Date) {
     output += decorateWithSpan('"' + value.toISOString() + '"', 'token string');
   } else if (valueType === 'object') {
     level++;
-    output += objectToHTML(value);
+    output += objectToHTML(value, maxExpandLevel);
     level--;
   } else if (valueType === 'number') {
     output += decorateWithSpan(value, 'token number');
@@ -70,8 +69,8 @@ function valueToHTML(value) {
   return output;
 }
 
-function arrayToHTML(json) {
+function arrayToHTML(json, maxExpandLevel: number) {
-  const collapsed = level > COLLAPSE_LEVEL ? 'collapsed' : '';
+  const collapsed = level > maxExpandLevel ? 'collapsed' : '';
   let output = `<div class="collapser"></div>${punctuation(
     '[',
   )}<span class="ellipsis"></span><ul class="array collapsible">`;
@@ -80,7 +79,7 @@ function arrayToHTML(json) {
   for (let i = 0; i < length; i++) {
     hasContents = true;
     output += '<li><div class="hoverable ' + collapsed + '">';
-    output += valueToHTML(json[i]);
+    output += valueToHTML(json[i], maxExpandLevel);
     if (i < length - 1) {
       output += ',';
     }
@@ -93,8 +92,8 @@ function arrayToHTML(json) {
   return output;
 }
 
-function objectToHTML(json) {
+function objectToHTML(json, maxExpandLevel: number) {
-  const collapsed = level > COLLAPSE_LEVEL ? 'collapsed' : '';
+  const collapsed = level > maxExpandLevel ? 'collapsed' : '';
   const keys = Object.keys(json);
   const length = keys.length;
   let output = `<div class="collapser"></div>${punctuation(
@@ -106,7 +105,7 @@ function objectToHTML(json) {
     hasContents = true;
     output += '<li><div class="hoverable ' + collapsed + '">';
     output += '<span class="property token string">"' + htmlEncode(key) + '"</span>: ';
-    output += valueToHTML(json[key]);
+    output += valueToHTML(json[key], maxExpandLevel);
     if (i < length - 1) {
       output += punctuation(',');
     }