asksuite-core/util/IntentResolver.js

const fallbackIntent = require('./fallbackIntent');
const Util = require('../util');

class IntentResolver {
  constructor(intents, companyId, text) {
    this.intents = intents;
    this.companyId = companyId;
    this.text = text ? text : '';
  }

  findDialogByIntent(intent) {
    let intentBot =
      this.intents.find(this.isTheSame(intent)) ||
      this.intents.find(this.isIntentForIDidntUnderstand);

    if (!intentBot || this.isIntentForIDidntUnderstand(intentBot)) {
      let msg = Util.replaceIfIsPhrase(this.text);
      msg = !msg ? this.text.toLowerCase() : msg;

      const notUnderstandable =
        (msg.length <= 2 && !Util.isNumeric(msg)) || Util.existsletterCount(msg, 3);
      if (notUnderstandable) {
        intentBot = this.intents.find(this.isIntentForNotUnderstandable);
      } else if (!intentBot || !intentBot.dialog) {
        // Fallback
        intentBot = {};
        intentBot.intent = fallbackIntent.normal.intent;
        intentBot.dialog = this.companyId + fallbackIntent.normal.dialogSuffix;
      }
    }

    return intentBot;
  }

  isTheSame(intent) {
    return item => {
      return item && intent && item.intent === intent;
    };
  }

  isIntentForIDidntUnderstand(item) {
    return (
      item && [fallbackIntent.normal.intent, fallbackIntent.grande.intent].includes(item.intent)
    );
  }

  isIntentForNotUnderstandable(item) {
    return item && item.intent === fallbackIntent.naoentendivel.intent;
  }

  static queryTextMaxLengthExceededDialog(companyId) {
    const intent = {};
    intent.intent = fallbackIntent.grande.intent;
    intent.dialog = companyId + fallbackIntent.grande.dialogSuffix;
    return intent;
  }

  static textNotDefinedDialog(companyId) {
    const intent = {};
    intent.intent = fallbackIntent.normal.intent;
    intent.dialog = companyId + fallbackIntent.normal.dialogSuffix;
    return intent;
  }
}

module.exports = IntentResolver;