frontend/marko/components/if-permitted/component.js

module.exports = class {
  onCreate() {
    this.state = {
      permitted: false
    }
  }
  
  onInput(input) {
    if (!input.user || !input.user.loggedIn) {
      this.state.permitted = input.not
      return
    }

    if (input.author != null && input.author != "" && input.user.name === input.author) {
      this.state.permitted = input.user.permissions.includes("member")
    } else if (Array.isArray(input.permission)) {
      this.state.permitted = input.user.permissions.find(p => input.permission.includes(p))
    } else {
      this.state.permitted = input.user.permissions.includes(input.permission)
    }

    // Flip the above permission
    if (input.not) {
      this.state.permitted = !this.state.permitted
    }
  }
}