alinex-validator/dist/type/Function.js

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _Schema = require('./Schema');

var _Schema2 = _interopRequireDefault(_Schema);

var _Error = require('../Error');

var _Error2 = _interopRequireDefault(_Error);

var _Reference = require('../Reference');

var _Reference2 = _interopRequireDefault(_Reference);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

class FunctionSchema extends _Schema2.default {
  constructor(base) {
    super(base);

    let raw = this._rules.descriptor.pop();
    this._rules.descriptor.push(this._typeDescriptor, this._lengthDescriptor, raw);
    raw = this._rules.validator.pop();
    this._rules.validator.push(this._typeValidator, this._lengthValidator, raw);
  }

  _typeDescriptor() {
    return 'Here a function is needed.\n';
  }

  _typeValidator(data) {
    if (typeof data.value !== 'function') {
      return Promise.reject(new _Error2.default(this, data, `Only a function is allowed, a \
${typeof data.value} is given here`));
    }
    return Promise.resolve();
  }

  min(limit) {
    const set = this._setting;
    if (limit) {
      if (!(limit instanceof _Reference2.default)) {
        if (set.max && !this._isReference('max') && limit > set.max) {
          throw new Error('Min length can´t be greater than max length');
        }
        if (limit < 0) throw new Error('Argument length for min() has to be positive');
      }
      set.min = limit;
    } else delete set.min;
    return this;
  }

  max(limit) {
    const set = this._setting;
    if (limit) {
      if (!(limit instanceof _Reference2.default)) {
        if (set.min && !this._isReference('min') && limit < set.min) {
          throw new Error('Max length can´t be less than min length');
        }
        if (limit < 0) throw new Error('Argument length for max() has to be positive');
      }
      set.max = limit;
    } else delete set.max;
    return this;
  }

  length(limit) {
    const set = this._setting;
    if (limit) {
      if (!(limit instanceof _Reference2.default)) {
        if (limit < 0) throw new Error('Length has to be positive');
      }
      set.min = limit;
      set.max = limit;
    } else {
      delete set.min;
      delete set.max;
    }
    return this;
  }

  _lengthDescriptor() {
    const set = this._setting;
    let msg = '';
    if (set.min instanceof _Reference2.default) {
      msg += `Minimum number of arguments depends on ${set.min.description}. `;
    }
    if (set.max instanceof _Reference2.default) {
      msg += `Maximum number of arguments depends on ${set.max.description}. `;
    }
    if (!this._isReference('min') && !this._isReference('max') && set.min && set.max) {
      msg = set.min === set.max ? `The function has to contain exactly ${set.min} arguments. ` : `The function can have between ${set.min} and ${set.max} arguments. `;
    } else if (!this._isReference('min') && set.min) {
      msg = `The function needs at least ${set.min} arguments. `;
    } else if (!this._isReference('max') && set.max) {
      msg = `The function allows up to ${set.min} arguments. `;
    }
    return msg.length ? `${msg.trim()}\n` : msg;
  }

  _lengthValidator(data) {
    const check = this._check;
    try {
      this._checkNumber('min');
      this._checkNumber('max');
      if (check.max && check.min && check.min > check.max) {
        throw new Error('Min arhuments can´t be greater than max arguments');
      }
    } catch (err) {
      return Promise.reject(new _Error2.default(this, data, err.message));
    }

    const num = data.value.length;

    if (check.min && num < check.min) {
      return Promise.reject(new _Error2.default(this, data, `The function has ${num} arguments. \
 This is too less, at least ${check.min} are needed.`));
    }
    if (check.max && num > check.max) {
      return Promise.reject(new _Error2.default(this, data, `The function has ${num} arguments. \
 This is too much, not more than ${check.max} are allowed.`));
    }
    return Promise.resolve();
  }
}

exports.default = FunctionSchema;