feat: support for named tuple members

README.md

@@ -14,7 +14,7 @@ Inspired by [`YousefED/typescript-json-schema`](https://github.com/YousefED/type
 
 ## Contributors
 
-This project is made possible by a [community of contributors](https://github.com/vega/ts-json-schema-generator/graphs/contributors). We welcome contributions of any kind (issues, code, documentation, examples, tests,...). Please read our [code of conduct](https://github.com/vega/vega/blob/master/CODE_OF_CONDUCT.md).
+This project is made possible by a [community of contributors](https://github.com/vega/ts-json-schema-generator/graphs/contributors). We welcome contributions of any kind (issues, code, documentation, examples, tests,...). Please read our [code of conduct](https://vega.github.io/vega/about/code-of-conduct).
 
 ## CLI Usage
 

factory/parser.ts

@@ -27,6 +27,7 @@ import { IntersectionNodeParser } from "../src/NodeParser/IntersectionNodeParser
 import { IntrinsicNodeParser } from "../src/NodeParser/IntrinsicNodeParser";
 import { LiteralNodeParser } from "../src/NodeParser/LiteralNodeParser";
 import { MappedTypeNodeParser } from "../src/NodeParser/MappedTypeNodeParser";
+import { NamedTupleMemberNodeParser } from "../src/NodeParser/NamedTupleMemberNodeParser";
 import { NeverTypeNodeParser } from "../src/NodeParser/NeverTypeNodeParser";
 import { NullLiteralNodeParser } from "../src/NodeParser/NullLiteralNodeParser";
 import { NumberLiteralNodeParser } from "../src/NodeParser/NumberLiteralNodeParser";
@@ -130,6 +131,7 @@ export function createParser(program: ts.Program, config: Config, augmentor?: Pa
         .addNodeParser(new UnionNodeParser(typeChecker, chainNodeParser))
         .addNodeParser(new IntersectionNodeParser(typeChecker, chainNodeParser))
         .addNodeParser(new TupleNodeParser(typeChecker, chainNodeParser))
+        .addNodeParser(new NamedTupleMemberNodeParser(chainNodeParser))
         .addNodeParser(new OptionalTypeNodeParser(chainNodeParser))
         .addNodeParser(new RestTypeNodeParser(chainNodeParser))
 

src/Error/UnknownNodeError.ts

@@ -3,7 +3,7 @@ import { BaseError } from "./BaseError";
 
 export class UnknownNodeError extends BaseError {
     public constructor(private node: ts.Node, private reference?: ts.Node) {
-        super(`Unknown node "${node.getFullText()}`);
+        super(`Unknown node "${node.getFullText()}" of kind "${ts.SyntaxKind[node.kind]}"`);
     }
 
     public getNode(): ts.Node {

src/NodeParser/NamedTupleMemberNodeParser.ts

@@ -0,0 +1,26 @@
+import ts from "typescript";
+import { Context, NodeParser } from "../NodeParser";
+import { SubNodeParser } from "../SubNodeParser";
+import { AnnotatedType } from "../Type/AnnotatedType";
+import { ArrayType } from "../Type/ArrayType";
+import { BaseType } from "../Type/BaseType";
+import { ReferenceType } from "../Type/ReferenceType";
+import { RestType } from "../Type/RestType";
+
+export class NamedTupleMemberNodeParser implements SubNodeParser {
+    public constructor(protected childNodeParser: NodeParser) {}
+
+    public supportsNode(node: ts.TypeNode): boolean {
+        return node.kind === ts.SyntaxKind.NamedTupleMember;
+    }
+
+    public createType(node: ts.NamedTupleMember, context: Context, reference?: ReferenceType): BaseType | undefined {
+        const baseType = this.childNodeParser.createType(node.type, context, reference);
+
+        if (baseType instanceof ArrayType && node.getChildAt(0).kind === ts.SyntaxKind.DotDotDotToken) {
+            return new RestType(baseType, node.name.text);
+        }
+
+        return baseType && new AnnotatedType(baseType, { title: node.name.text }, false);
+    }
+}

src/Type/RestType.ts

@@ -2,12 +2,16 @@ import { ArrayType } from "./ArrayType";
 import { BaseType } from "./BaseType";
 
 export class RestType extends BaseType {
-    public constructor(private item: ArrayType) {
+    public constructor(private item: ArrayType, private title: string | null = null) {
         super();
     }
 
     public getId(): string {
-        return `...${this.item.getId()}`;
+        return `...${this.item.getId()}${this.title || ""}`;
+    }
+
+    public getTitle(): string | null {
+        return this.title;
     }
 
     public getType(): ArrayType {

src/TypeFormatter/RestTypeFormatter.ts

@@ -7,12 +7,21 @@ import { TypeFormatter } from "../TypeFormatter";
 export class RestTypeFormatter implements SubTypeFormatter {
     public constructor(protected childTypeFormatter: TypeFormatter) {}
 
-    public supportsType(type: RestType): boolean {
+    public supportsType(type: BaseType): boolean {
         return type instanceof RestType;
     }
+
     public getDefinition(type: RestType): Definition {
-        return this.childTypeFormatter.getDefinition(type.getType());
+        const definition = this.childTypeFormatter.getDefinition(type.getType());
+        const title = type.getTitle();
+
+        if (title !== null && typeof definition.items === "object") {
+            return { ...definition, items: { ...definition.items, title } };
+        }
+
+        return definition;
     }
+
     public getChildren(type: RestType): BaseType[] {
         return this.childTypeFormatter.getChildren(type.getType());
     }

src/TypeFormatter/TupleTypeFormatter.ts

@@ -11,16 +11,16 @@ import { uniqueArray } from "../Utils/uniqueArray";
 export class TupleTypeFormatter implements SubTypeFormatter {
     public constructor(protected childTypeFormatter: TypeFormatter) {}
 
-    public supportsType(type: TupleType): boolean {
+    public supportsType(type: BaseType): boolean {
         return type instanceof TupleType;
     }
+
     public getDefinition(type: TupleType): Definition {
         const subTypes = type.getTypes().filter(notUndefined);
 
         const requiredElements = subTypes.filter((t) => !(t instanceof OptionalType) && !(t instanceof RestType));
-        const optionalElements = subTypes.filter((t) => t instanceof OptionalType) as OptionalType[];
-        const restElements = subTypes.filter((t) => t instanceof RestType) as RestType[];
-        const restType = restElements.length ? restElements[0].getType().getItem() : undefined;
+        const optionalElements = subTypes.filter((t): t is OptionalType => t instanceof OptionalType);
+        const restType = subTypes.find((t): t is RestType => t instanceof RestType);
         const firstItemType = requiredElements.length > 0 ? requiredElements[0] : optionalElements[0]?.getType();
 
         // Check whether the tuple is of any of the following forms:
@@ -32,7 +32,7 @@ export class TupleTypeFormatter implements SubTypeFormatter {
             firstItemType &&
             requiredElements.every((item) => item.getId() === firstItemType.getId()) &&
             optionalElements.every((item) => item.getType().getId() === firstItemType.getId()) &&
-            (restElements.length === 0 || (restElements.length === 1 && restType?.getId() === firstItemType.getId()));
+            (!restType || restType.getType().getItem().getId() === firstItemType.getId());
 
         // If so, generate a simple array with minItems (and possibly maxItems) instead.
         if (isUniformArray) {
@@ -47,18 +47,21 @@ export class TupleTypeFormatter implements SubTypeFormatter {
         const requiredDefinitions = requiredElements.map((item) => this.childTypeFormatter.getDefinition(item));
         const optionalDefinitions = optionalElements.map((item) => this.childTypeFormatter.getDefinition(item));
         const itemsTotal = requiredDefinitions.length + optionalDefinitions.length;
-        const restDefinition = restType ? this.childTypeFormatter.getDefinition(restType) : undefined;
+        const additionalItems = restType ? this.childTypeFormatter.getDefinition(restType).items : undefined;
 
         return {
             type: "array",
             minItems: requiredDefinitions.length,
             ...(itemsTotal ? { items: requiredDefinitions.concat(optionalDefinitions) } : {}), // with items
-            ...(!itemsTotal && restDefinition ? { items: restDefinition } : {}), // with only rest param
-            ...(!itemsTotal && !restDefinition ? { maxItems: 0 } : {}), // empty
-            ...(restDefinition && itemsTotal ? { additionalItems: restDefinition } : {}), // with items and rest
-            ...(!restDefinition && itemsTotal ? { maxItems: itemsTotal } : {}), // without rest
+            ...(!itemsTotal && additionalItems ? { items: additionalItems } : {}), // with only rest param
+            ...(!itemsTotal && !additionalItems ? { maxItems: 0 } : {}), // empty
+            ...(additionalItems && !Array.isArray(additionalItems) && itemsTotal
+                ? { additionalItems: additionalItems }
+                : {}), // with rest items
+            ...(!additionalItems && itemsTotal ? { maxItems: itemsTotal } : {}), // without rest
         };
     }
+
     public getChildren(type: TupleType): BaseType[] {
         return uniqueArray(
             type

test/valid-data-type.test.ts

@@ -27,6 +27,7 @@ describe("valid-data-type", () => {
     it("type-aliases-tuple-optional-items", assertValidSchema("type-aliases-tuple-optional-items", "MyTuple"));
     it("type-aliases-tuple-rest", assertValidSchema("type-aliases-tuple-rest", "MyTuple"));
     it("type-aliases-tuple-only-rest", assertValidSchema("type-aliases-tuple-only-rest", "MyTuple"));
+    it("type-named-tuple-member", assertValidSchema("type-named-tuple-member", "*"));
 
     it("type-maps", assertValidSchema("type-maps", "MyObject"));
     it("type-primitives", assertValidSchema("type-primitives", "MyObject"));

test/valid-data/type-named-tuple-member/main.ts

@@ -0,0 +1,13 @@
+export type MyNamedUniformTuple = [first: string, second: string];
+
+export type MyNamedTuple = [first: string, second: number];
+
+export type MyNamedUniformTupleWithRest = [first: number, second: number, ...third: number[]];
+
+export type MyNamedTupleWithRest = [first: string, second: number, ...third: string[]];
+
+export type MyNamedNestedArrayWithinTuple = [first: string, second: number, third: string[]];
+
+export type MyNamedNestedArrayWithinTupleWithRest = [first: string, second: number, ...third: string[][]];
+
+export type MyNamedTupleWithOnlyRest = [...first: number[]];

test/valid-data/type-named-tuple-member/schema.json

@@ -0,0 +1,122 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "definitions": {
+    "MyNamedUniformTuple": {
+      "items": [
+        {
+          "title": "first",
+          "type": "string"
+        },
+        {
+          "title": "second",
+          "type": "string"
+        }
+      ],
+      "minItems": 2,
+      "maxItems": 2,
+      "type": "array"
+    },
+    "MyNamedTuple": {
+      "items": [
+        {
+          "title": "first",
+          "type": "string"
+        },
+        {
+          "title": "second",
+          "type": "number"
+        }
+      ],
+      "maxItems": 2,
+      "minItems": 2,
+      "type": "array"
+    },
+    "MyNamedUniformTupleWithRest": {
+      "additionalItems": {
+        "title": "third",
+        "type": "number"
+      },
+      "items": [
+        {
+          "title": "first",
+          "type": "number"
+        },
+        {
+          "title": "second",
+          "type": "number"
+        }
+      ],
+      "minItems": 2,
+      "type": "array"
+    },
+    "MyNamedTupleWithRest": {
+      "additionalItems": {
+        "title": "third",
+        "type": "string"
+      },
+      "items": [
+        {
+          "title": "first",
+          "type": "string"
+        },
+        {
+          "title": "second",
+          "type": "number"
+        }
+      ],
+      "minItems": 2,
+      "type": "array"
+    },
+    "MyNamedNestedArrayWithinTuple": {
+      "items": [
+        {
+          "title": "first",
+          "type": "string"
+        },
+        {
+          "title": "second",
+          "type": "number"
+        },
+        {
+          "items": {
+            "type": "string"
+          },
+          "title": "third",
+          "type": "array"
+        }
+      ],
+      "maxItems": 3,
+      "minItems": 3,
+      "type": "array"
+    },
+    "MyNamedNestedArrayWithinTupleWithRest": {
+      "additionalItems": {
+        "title": "third",
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "items": [
+        {
+          "title": "first",
+          "type": "string"
+        },
+        {
+          "title": "second",
+          "type": "number"
+        }
+      ],
+      "minItems": 2,
+      "type": "array"
+    },
+    "MyNamedTupleWithOnlyRest": {
+      "items": {
+        "title": "first",
+        "type": "number"
+      },
+      "minItems": 0,
+      "type": "array"
+    }
+  }
+}