Implement TSDocConfigFile.saveFile() and saveToObject()

tsdoc-config/src/TSDocConfigFile.ts

@@ -36,7 +36,6 @@ interface ITagConfigJson {
 
 interface IConfigJson {
   $schema: string;
-  tsdocVersion: string;
   extends?: string[];
   tagDefinitions?: ITagConfigJson[];
   supportForTags?: { [tagName: string]: boolean };
@@ -372,6 +371,66 @@ export class TSDocConfigFile {
     return configFile;
   }
 
+  /**
+   * Writes the config file content to a JSON file with the specified file path.
+   */
+  public saveFile(jsonFilePath: string): void {
+    const jsonObject: unknown = this.saveToObject();
+    const jsonContent: string = JSON.stringify(jsonObject, undefined, 2);
+    fs.writeFileSync(jsonFilePath, jsonContent);
+  }
+
+  /**
+   * Writes the object state into a JSON-serializable object.
+   */
+  public saveToObject(): unknown {
+    const configJson: IConfigJson = {
+      $schema: TSDocConfigFile.CURRENT_SCHEMA_URL,
+    };
+
+    if (this.tagDefinitions.length > 0) {
+      configJson.tagDefinitions = [];
+      for (const tagDefinition of this.tagDefinitions) {
+        configJson.tagDefinitions.push(TSDocConfigFile._serializeTagDefinition(tagDefinition));
+      }
+    }
+
+    if (this.supportForTags.size > 0) {
+      configJson.supportForTags = {};
+      this.supportForTags.forEach((supported, tagName) => {
+        configJson.supportForTags![tagName] = supported;
+      });
+    }
+
+    return configJson;
+  }
+
+  private static _serializeTagDefinition(tagDefinition: TSDocTagDefinition): ITagConfigJson {
+    let syntaxKind: 'inline' | 'block' | 'modifier' | undefined;
+    switch (tagDefinition.syntaxKind) {
+      case TSDocTagSyntaxKind.InlineTag:
+        syntaxKind = 'inline';
+        break;
+      case TSDocTagSyntaxKind.BlockTag:
+        syntaxKind = 'block';
+        break;
+      case TSDocTagSyntaxKind.ModifierTag:
+        syntaxKind = 'modifier';
+        break;
+      default:
+        throw new Error('Unimplemented TSDocTagSyntaxKind');
+    }
+
+    const tagConfigJson: ITagConfigJson = {
+      tagName: tagDefinition.tagName,
+      syntaxKind,
+    };
+    if (tagDefinition.allowMultiple) {
+      tagConfigJson.allowMultiple = true;
+    }
+    return tagConfigJson;
+  }
+
   /**
    * Returns a report of any errors that occurred while attempting to load this file or any files
    * referenced via the "extends" field.

tsdoc-config/src/__tests__/TSDocConfigFile.test.ts

@@ -45,6 +45,7 @@ test('Load p1', () => {
     }
   `);
 });
+
 test('Load p2', () => {
   expect(testLoadingFolder('assets/p2')).toMatchInlineSnapshot(`
     Object {
@@ -72,6 +73,7 @@ test('Load p2', () => {
     }
   `);
 });
+
 test('Load p3', () => {
   expect(testLoadingFolder('assets/p3')).toMatchInlineSnapshot(`
     Object {
@@ -149,6 +151,7 @@ test('Load p3', () => {
     }
   `);
 });
+
 test('Load p4', () => {
   expect(testLoadingFolder('assets/p4')).toMatchInlineSnapshot(`
     Object {
@@ -192,3 +195,21 @@ test('Load p4', () => {
     }
   `);
 });
+
+test('Re-serialize p2', () => {
+  const configFile: TSDocConfigFile = TSDocConfigFile.loadForFolder(path.join(__dirname, 'assets/p3'));
+  expect(configFile.saveToObject()).toMatchInlineSnapshot(`
+    Object {
+      "$schema": "https://developer.microsoft.com/json-schemas/tsdoc/v0/tsdoc.schema.json",
+      "supportForTags": Object {
+        "@base2": true,
+      },
+      "tagDefinitions": Array [
+        Object {
+          "syntaxKind": "modifier",
+          "tagName": "@root",
+        },
+      ],
+    }
+  `);
+});