strapi/packages/strapi-database/lib/lifecycle-manager.js

'use strict';
const debug = require('debug')('strapi-database:lifecycle');
const { isFunction, isNil } = require('lodash/fp');

class LifecycleManager {
  constructor(db) {
    debug('Initialize lifecycle manager');
    this.db = db;
    this.lifecycles = [];
  }

  register(lifecycle) {
    debug('Register lifecycle');

    this.lifecycles.push(lifecycle);
  }

  async run(action, model, ...args) {
    for (const lifecycle of this.lifecycles) {
      if (!isNil(lifecycle.model) && lifecycle.model !== model.uid) {
        continue;
      }

      if (isFunction(lifecycle[action])) {
        debug(`Run lifecycle ${action} for model ${model.uid}`);

        await lifecycle[action](...args);
      }
    }
  }
}

module.exports = strapi => {
  return new LifecycleManager(strapi);
};