Emi Headers class generator

In the context of http requests, there is always request and response headers, which is a key pair definition. Modern javascript standard is using Headers class, and Emi generates the header classes, by extending that class, and adding extra functions.

Example schema:

- name: accept-language
  type: string
- name: authroization
  type: string
- name: cache-time
  type: int64

Would generate the following code:

/**
 * SampleHeaders class
 * Auto-generated from EmiAction
 */
export class SampleHeaders extends Headers {
  /**
   *
   * @returns { string | null }
   */
  getAcceptLanguage () {
    return this.#getTyped('accept-language', 'string | null');
  }
  /**
   *
   * @param { string | null } value
   */
  setAcceptLanguage (value) {
  if (value !== null) {
    this.set('accept-language', value);
  }
    return this;
  }
  /**
   *
   * @returns { string | null }
   */
  getAuthroization () {
    return this.#getTyped('authroization', 'string | null');
  }
  /**
   *
   * @param { string | null } value
   */
  setAuthroization (value) {
  if (value !== null) {
    this.set('authroization', value);
  }
    return this;
  }
  /**
   *
   * @returns { number | null }
   */
  getCacheTime () {
    return this.#getTyped('cache-time', 'number | null');
  }
  /**
   *
   * @param { number | null } value
   */
  setCacheTime (value) {
  if (value !== null) {
    this.set('cache-time', value);
  }
    return this;
  }
  // the getters generated by us would be casting types before returning.
  // you still can use .get function to get the string value.
  // eslint-disable-next-line no-unused-private-class-members
  #getTyped(key, type) {
    const val = this.get(key);
    if (val == null) return null;
    const t = type.toLowerCase();
    if (t.includes('number')) return Number(val);
    if (t.includes('bool')) return val === 'true';
    return val; // string or any other fallback
  }
  /**
   * @returns {Record<string, string>}
   * Converts Headers to plain object
   */
  toObject() {
    return Object.fromEntries(this.entries());
  }
}


  function isPlausibleObject(v: any) { return false }