Refactor

src/misc/schema.ts

@@ -0,0 +1,41 @@
+export type Schema = {
+	type: 'number' | 'string' | 'array' | 'object' | any;
+	optional?: boolean;
+	items?: Schema;
+	properties?: Obj;
+	description?: string;
+};
+
+export type Obj = { [key: string]: Schema };
+
+export type ObjType<s extends Obj> = { [P in keyof s]: SchemaType<s[P]> };
+
+// https://qiita.com/hrsh7th@github/items/84e8968c3601009cdcf2
+type MyType<T extends Schema> = {
+	0: any;
+	1: SchemaType<T>;
+}[T extends Schema ? 1 : 0];
+
+export type SchemaType<p extends Schema> =
+	p['type'] extends 'number' ? number :
+	p['type'] extends 'string' ? string :
+	p['type'] extends 'array' ? MyType<p['items']>[] :
+	p['type'] extends 'object' ? ObjType<p['properties']> :
+	any;
+
+export function convertOpenApiSchema(schema: Schema) {
+	const x = JSON.parse(JSON.stringify(schema)); // copy
+	if (!['string', 'number', 'boolean', 'array', 'object'].includes(x.type)) {
+		x['$ref'] = `#/components/schemas/${x.type}`;
+	}
+	if (x.type === 'array' && x.items) {
+		x.items = convertOpenApiSchema(x.items);
+	}
+	if (x.type === 'object' && x.properties) {
+		x.required = Object.entries(x.properties).filter(([k, v]: any) => !v.isOptional).map(([k, v]: any) => k);
+		for (const k of Object.keys(x.properties)) {
+			x.properties[k] = convertOpenApiSchema(x.properties[k]);
+		}
+	}
+	return x;
+}