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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/tcomb/lib

Просмотр файла: interface.js

var assert = require('./assert');
var isTypeName = require('./isTypeName');
var String = require('./String');
var Function = require('./Function');
var isBoolean = require('./isBoolean');
var isObject = require('./isObject');
var isNil = require('./isNil');
var create = require('./create');
var getTypeName = require('./getTypeName');
var dict = require('./dict');
var getDefaultInterfaceName = require('./getDefaultInterfaceName');
var isIdentity = require('./isIdentity');
var is = require('./is');
var extend = require('./extend');
var assign = require('./assign');

function extendInterface(mixins, name) {
  return extend(inter, mixins, name);
}

function getOptions(options) {
  if (!isObject(options)) {
    options = isNil(options) ? {} : { name: options };
  }
  if (!options.hasOwnProperty('strict')) {
    options.strict = inter.strict;
  }
  return options;
}

function inter(props, options) {

  options = getOptions(options);
  var name = options.name;
  var strict = options.strict;

  if (process.env.NODE_ENV !== 'production') {
    assert(dict(String, Function).is(props), function () { return 'Invalid argument props ' + assert.stringify(props) + ' supplied to interface(props, [options]) combinator (expected a dictionary String -> Type)'; });
    assert(isTypeName(name), function () { return 'Invalid argument name ' + assert.stringify(name) + ' supplied to interface(props, [options]) combinator (expected a string)'; });
    assert(isBoolean(strict), function () { return 'Invalid argument strict ' + assert.stringify(strict) + ' supplied to struct(props, [options]) combinator (expected a boolean)'; });
  }

  var displayName = name || getDefaultInterfaceName(props);
  var identity = Object.keys(props).map(function (prop) { return props[prop]; }).every(isIdentity);

  function Interface(value, path) {

    if (process.env.NODE_ENV === 'production') {
      if (identity) {
        return value; // just trust the input if elements must not be hydrated
      }
    }

    if (process.env.NODE_ENV !== 'production') {
      path = path || [displayName];
      assert(!isNil(value), function () { return 'Invalid value ' + value + ' supplied to ' + path.join('/'); });
      // strictness
      if (strict) {
        for (var k in value) {
          assert(props.hasOwnProperty(k), function () { return 'Invalid additional prop "' + k + '" supplied to ' + path.join('/'); });
        }
      }
    }

    var idempotent = true;
    var ret = identity ? {} : assign({}, value);
    for (var prop in props) {
      var expected = props[prop];
      var actual = value[prop];
      var instance = create(expected, actual, ( process.env.NODE_ENV !== 'production' ? path.concat(prop + ': ' + getTypeName(expected)) : null ));
      idempotent = idempotent && ( actual === instance );
      ret[prop] = instance;
    }

    if (idempotent) { // implements idempotency
      ret = value;
    }

    if (process.env.NODE_ENV !== 'production') {
      Object.freeze(ret);
    }

    return ret;

  }

  Interface.meta = {
    kind: 'interface',
    props: props,
    name: name,
    identity: identity,
    strict: strict
  };

  Interface.displayName = displayName;

  Interface.is = function (x) {
    if (isNil(x)) {
      return false;
    }
    if (strict) {
      for (var k in x) {
        if (!props.hasOwnProperty(k)) {
          return false;
        }
      }
    }
    for (var prop in props) {
      if (!is(x[prop], props[prop])) {
        return false;
      }
    }
    return true;
  };

  Interface.update = function (instance, patch) {
    return Interface(assert.update(instance, patch));
  };

  Interface.extend = function (xs, name) {
    return extendInterface([Interface].concat(xs), name);
  };

  return Interface;
}

inter.strict = false;
inter.getOptions = getOptions;
inter.getDefaultName = getDefaultInterfaceName;
inter.extend = extendInterface;
module.exports = inter;

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