test-triam-base-contract/lib/contract_base/storage.js

Low level triam smart cotnract support library

'use strict';

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

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var Storage = exports.Storage = function () {
  function Storage(_storage) {
    _classCallCheck(this, Storage);

    if (_storage) {
      this.storage = Object.assign({}, _storage);
    } else {
      this.storage = {};
    }
  }

  _createClass(Storage, [{
    key: 'set',
    value: function set(_name, _data) {
      if (this.storage.hasOwnProperty(_name)) {
        throw new Error('storage has property' + _name);
      }
      this.storage[_name] = _data;
    }
  }, {
    key: 'get',
    value: function get(_name) {
      return this.storage[_name];
    }
  }, {
    key: 'remove',
    value: function remove(_name) {
      delete this.storage[_name];
    }
  }, {
    key: 'update',
    value: function update(_name, _data) {
      if (!this.storage.hasOwnProperty(_name)) {
        throw new Error('storage can not find property' + _name);
      }
      this.storage[_name] = _data;
    }
  }, {
    key: 'save',
    value: function save() {
      var stringData = JSON.stringify(this.storage);
      var ab = str2ab(stringData);
      var buf = toBuffer(ab);
      return buf.toString('hex');
    }
  }, {
    key: 'recover',
    value: function recover(_data) {
      var _buf = Buffer.from(_data, 'hex');
      var _ab = toArrayBuffer(_buf);
      var _state = ab2str(_ab);
      var loadState = JSON.parse(_state);
      this.storage = Object.assign({}, this.storage, loadState);
      return this.storage;
    }
  }, {
    key: 'has',
    value: function has(_name) {
      return this.storage.hasOwnProperty(_name);
    }
  }, {
    key: 'show',
    value: function show() {
      return this.storage;
    }
  }]);

  return Storage;
}();

var ab2str = function ab2str(buf) {
  return String.fromCharCode.apply(null, new Uint16Array(buf));
};

var str2ab = function str2ab(str) {
  var buf = new ArrayBuffer(str.length * 2); // 2 bytes for each char
  var bufView = new Uint16Array(buf);
  for (var i = 0, strLen = str.length; i < strLen; i++) {
    bufView[i] = str.charCodeAt(i);
  }
  return buf;
};

var toArrayBuffer = function toArrayBuffer(buf) {
  var ab = new ArrayBuffer(buf.length);
  var view = new Uint8Array(ab);
  for (var i = 0; i < buf.length; ++i) {
    view[i] = buf[i];
  }
  return ab;
};
var toBuffer = function toBuffer(ab) {
  var buf = new Buffer(ab.byteLength);
  var view = new Uint8Array(ab);
  for (var i = 0; i < buf.length; ++i) {
    buf[i] = view[i];
  }
  return buf;
};