Pokedex bot: Type effectiveness endpoint in server.js

Type effectiveness endpoint in server.js

if (get_type_effectiveness) {
    const pokemon_type = parameters.pokemon_types;
    let type_effectiveness = parameters.type_effectiveness;
    const type_effectiveness_formatted = type_effectiveness.replace(/_/g, ' ');
    const type_effectiveness_word = outputContexts[0].parameters['type_effectiveness.original'];

    let from_or_to = type_effectiveness.split('_')[2];

    const pokemon_type_comes_first = (queryText.indexOf(pokemon_type) < queryText.indexOf(type_effectiveness_word)) ? true : false;

    const exempt_words = ['resistant', 'no damage', 'zero damage', 'no effect'];
    const has_exempt_words = exempt_words.some(v => type_effectiveness_word.includes(v));

    if (
      (pokemon_type_comes_first && !has_exempt_words) ||
      (!pokemon_type_comes_first && has_exempt_words)
    ) {
      let new_from_or_to = (from_or_to == 'from') ? 'to' : 'from';
      type_effectiveness = type_effectiveness.replace(from_or_to, new_from_or_to);
      from_or_to = new_from_or_to;
    }

    const response = await axios_instance.get(`/type/${pokemon_type}`);
    const damage_relations = (response.data.damage_relations[type_effectiveness].length > 0) ? response.data.damage_relations[type_effectiveness].map(item => item.name).join(', ') : 'none';

    const nature_of_damage = (from_or_to == 'from') ? 'receives' : 'inflicts';

    fulfillmentText = (nature_of_damage == 'inflicts') ? 
      `${pokemon_type} type inflicts ${type_effectiveness_formatted} ${damage_relations} type` : 
      `${pokemon_type} ${nature_of_damage} ${type_effectiveness_formatted} the following: ${damage_relations}`;

    Object.assign(response_obj, {
      fulfillmentText
    });
  }