feat: Support for parsing optional properties (class & interface) (buehler#80)

 Related to buehler#80.

Author: ondratra

src/code-generators/typescript-generators/propertyDeclaration.ts

@@ -16,5 +16,5 @@ export function generatePropertyDeclaration(
 ): string {
  return `${Array(tabSize + 1).join(' ')}` +
  `${property.visibility !== undefined ? getVisibilityText(property.visibility) + ' ' : ''}` +
- `${property.name}${property.type ? `: ${property.type}` : ''};\n`;
+ `${property.name}${property.optional ? '?' : ''}${property.type ? `: ${property.type}` : ''};\n`;
 }

src/declarations/PropertyDeclaration.ts

@@ -14,6 +14,7 @@ export class PropertyDeclaration implements ScopedDeclaration, TypedDeclaration
  public name: string,
  public visibility: DeclarationVisibility | undefined,
  public type: string | undefined,
+ public optional: boolean,
  public start?: number,
  public end?: number,
  ) { }

src/node-parser/class-parser.ts

@@ -88,6 +88,7 @@ export function parseCtorParams(
  (o.name as Identifier).text,
  getNodeVisibility(o),
  getNodeType(o.type),
+ !!o.questionToken,
  o.getStart(),
  o.getEnd(),
  ),
@@ -137,6 +138,7 @@ export function parseClass(tsResource: Resource, node: ClassDeclaration): void {
  (o.name as Identifier).text,
  getNodeVisibility(o),
  getNodeType(o.type),
+ !!o.questionToken,
  o.getStart(),
  o.getEnd(),
  ),
@@ -148,6 +150,7 @@ export function parseClass(tsResource: Resource, node: ClassDeclaration): void {
  (o.name as Identifier).text,
  getNodeVisibility(o),
  getNodeType(o.type),
+ !!o.questionToken,
  o.getStart(),
  o.getEnd(),
  ),

src/node-parser/interface-parser.ts

@@ -37,6 +37,7 @@ export function parseInterface(resource: Resource, node: InterfaceDeclaration):
  (o.name as Identifier).text,
  DeclarationVisibility.Public,
  getNodeType(o.type),
+ !!o.questionToken,
  o.getStart(),
  o.getEnd(),
  ),

test/__snapshots__/TypescriptParser.spec.ts.snap

@@ -65,6 +65,7 @@ ClassDeclaration {
  PropertyDeclaration {
  "end": 166,
  "name": "param1",
+ "optional": false,
  "start": 145,
  "type": "string",
  "visibility": 2,
@@ -172,20 +173,23 @@ ClassDeclaration {
  PropertyDeclaration {
  "end": 363,
  "name": "_property",
+ "optional": false,
  "start": 337,
  "type": "string",
  "visibility": 0,
  },
  PropertyDeclaration {
  "end": 394,
  "name": "protect",
+ "optional": false,
  "start": 368,
  "type": "string",
  "visibility": 1,
  },
  PropertyDeclaration {
  "end": 418,
  "name": "pub",
+ "optional": false,
  "start": 399,
  "type": "string",
  "visibility": 2,
@@ -653,13 +657,15 @@ InterfaceDeclaration {
  PropertyDeclaration {
  "end": 55,
  "name": "property1",
+ "optional": false,
  "start": 37,
  "type": "string",
  "visibility": 2,
  },
  PropertyDeclaration {
  "end": 78,
  "name": "property2",
+ "optional": false,
  "start": 60,
  "type": "number",
  "visibility": 2,
@@ -743,13 +749,15 @@ InterfaceDeclaration {
  PropertyDeclaration {
  "end": 191,
  "name": "property1",
+ "optional": false,
  "start": 173,
  "type": "string",
  "visibility": 2,
  },
  PropertyDeclaration {
  "end": 214,
  "name": "property2",
+ "optional": false,
  "start": 196,
  "type": "number",
  "visibility": 2,