Method renameSubject

lib/src/store.ts:262–274

* Changes the Subject of a Resource. Checks if the new name is already taken, * errors if so.

(oldSubject: string, newSubject: string)

   * errors if so.
   */
  async renameSubject(oldSubject: string, newSubject: string): Promise<void> {
    tryValidURL(newSubject);
    const old = this.resources.get(oldSubject);
    if (old == undefined) {
      throw Error(`Old subject does not exist in store: ${oldSubject}`);
    }
    if (await this.checkSubjectTaken(newSubject)) {
      throw Error(`New subject name is already taken: ${newSubject}`);
    }
    old.setSubject(newSubject);
    this.resources.set(newSubject, old);
    this.removeResource(oldSubject);
  }

  /**
   * Sets the current Agent, used for signing commits. Warning: doing this