als-mongo-list/lib/sort/sort.js

A flexible, lightweight MongoDB query utility for Node.js applications. Simplifies database operations with intuitive filtering, pagination, sorting, and field selection. Ideal for REST API endpoints, providing a primary List class that abstracts complex

class Sort {
   constructor(listObj) {
      this.input = null
      this.init(listObj);
   }

   init({ tree, sortKeys }) {
      if (sortKeys.size === 0) return null
      const options = [];
      
      Array.from(sortKeys).forEach((key) => {
         const fieldType = tree[key]?.type?.name;
         if (!fieldType) return; // Пропустить ключи без типа
         if (fieldType === 'String') {
            options.push({ value: key, text: 'a_z',key })
            options.push({ value: '-' + key, text: 'z_a',key })
         } else if (fieldType === 'Number') {
            options.push({ value: '-' + key, text: 'small_big',key })
            options.push({ value: key, text: 'big_small',key })
         } else if (fieldType === 'Boolean') {
            options.push({ value: key, text: 'yes_first',key })
            options.push({ value: '-' + key, text: 'no_first',key })
         } else if (fieldType === 'Date') {
            options.push({ value: '-' + key, text:'new_first',key })
            options.push({ value: key, text: 'old_first',key })
         }
      });

      this.input = { tag: 'select', name: 'orderBy', options }; // Создание элемента select
   }

   getSort(query) {
      const value = query.orderBy
      if (this.input === null || !value) return null
      if (!this.input.options.find((option) => option.value === value)) return null; // Неверное значение orderBy
      const direction = value.startsWith('-') ? -1 : 1;
      const field = value.startsWith('-') ? value.slice(1) : value;
      return { [field]: direction }
   }
}

module.exports = Sort;