[BUG][typescript-fetch] Name clash between models and operations

Created by: haraldF

Description

Imagine a Model:

    SubscribeRequest:
      type: object
      properties:
        # ...

and an operation called subscribe:

paths:
  /subscriptions:
    post:
      summary: Subscribe
      operationId: subscribe
      parameters:
          # ...
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SubscribeRequest'
        required: true

The generated TypeScript operation would import SubscribeRequest but also generate a class called SubscribeRequest in the same file, which leads to a compilation error:

import {
    SubscribeRequest,
    SubscribeRequestFromJSON,
    SubscribeRequestToJSON,
} from '../models';

// ...

// ERROR - SubscribeRequest name already taken
export interface SubscribeRequest {
    // ...
}

openapi-generator version

Today's master (but also happens with latest released version)

Suggest a fix

One "naive" fix would be to simply escape all models that end with Request:

    @Override
    public String toModelName(final String name) {
        String modelName = super.toModelName(name);
        if (modelName.endsWith("Request") && !modelName.startsWith("Model")) {
            modelName = "Model" + modelName;
        }
        return modelName;
    }