budibase/packages/string-templates/src/helpers/Helper.js

class Helper {
  constructor(name, fn) {
    this.name = name
    this.fn = fn
  }

  register(handlebars) {
    // wrap the function so that no helper can cause handlebars to break
    handlebars.registerHelper(this.name, (value, info) => {
      const context = info?.data?.root
      return this.fn(value, context || {}) || value
    })
  }

  unregister(handlebars) {
    handlebars.unregisterHelper(this.name)
  }
}

module.exports = Helper