Eve-Project/app-node/node_modules/parse/lib/node/ObjectStateMutations.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.commitServerChanges = commitServerChanges;
exports.defaultState = defaultState;
exports.estimateAttribute = estimateAttribute;
exports.estimateAttributes = estimateAttributes;
exports.mergeFirstPendingState = mergeFirstPendingState;
exports.popPendingState = popPendingState;
exports.pushPendingState = pushPendingState;
exports.setPendingOp = setPendingOp;
exports.setServerData = setServerData;
var _encode = _interopRequireDefault(require("./encode"));
var _ParseFile = _interopRequireDefault(require("./ParseFile"));
var _ParseObject = _interopRequireDefault(require("./ParseObject"));
var _ParseRelation = _interopRequireDefault(require("./ParseRelation"));
var _TaskQueue = _interopRequireDefault(require("./TaskQueue"));
var _ParseOp = require("./ParseOp");
function _interopRequireDefault(obj) {
  return obj && obj.__esModule ? obj : {
    default: obj
  };
}
/**
 * @flow
 */
/*:: import type { Op } from './ParseOp';*/
/*:: export type AttributeMap = { [attr: string]: any };*/
/*:: export type OpsMap = { [attr: string]: Op };*/
/*:: export type ObjectCache = { [attr: string]: string };*/
/*:: export type State = {
  serverData: AttributeMap,
  pendingOps: Array<OpsMap>,
  objectCache: ObjectCache,
  tasks: TaskQueue,
  existed: boolean,
};*/
function defaultState() /*: State*/{
  return {
    serverData: {},
    pendingOps: [{}],
    objectCache: {},
    tasks: new _TaskQueue.default(),
    existed: false
  };
}
function setServerData(serverData /*: AttributeMap*/, attributes /*: AttributeMap*/) {
  for (const attr in attributes) {
    if (typeof attributes[attr] !== 'undefined') {
      serverData[attr] = attributes[attr];
    } else {
      delete serverData[attr];
    }
  }
}
function setPendingOp(pendingOps /*: Array<OpsMap>*/, attr /*: string*/, op /*: ?Op*/) {
  const last = pendingOps.length - 1;
  if (op) {
    pendingOps[last][attr] = op;
  } else {
    delete pendingOps[last][attr];
  }
}
function pushPendingState(pendingOps /*: Array<OpsMap>*/) {
  pendingOps.push({});
}
function popPendingState(pendingOps /*: Array<OpsMap>*/) /*: OpsMap*/{
  const first = pendingOps.shift();
  if (!pendingOps.length) {
    pendingOps[0] = {};
  }
  return first;
}
function mergeFirstPendingState(pendingOps /*: Array<OpsMap>*/) {
  const first = popPendingState(pendingOps);
  const next = pendingOps[0];
  for (const attr in first) {
    if (next[attr] && first[attr]) {
      const merged = next[attr].mergeWith(first[attr]);
      if (merged) {
        next[attr] = merged;
      }
    } else {
      next[attr] = first[attr];
    }
  }
}
function estimateAttribute(serverData /*: AttributeMap*/, pendingOps /*: Array<OpsMap>*/, className /*: string*/, id /*: ?string*/, attr /*: string*/) /*: mixed*/{
  let value = serverData[attr];
  for (let i = 0; i < pendingOps.length; i++) {
    if (pendingOps[i][attr]) {
      if (pendingOps[i][attr] instanceof _ParseOp.RelationOp) {
        if (id) {
          value = pendingOps[i][attr].applyTo(value, {
            className: className,
            id: id
          }, attr);
        }
      } else {
        value = pendingOps[i][attr].applyTo(value);
      }
    }
  }
  return value;
}
function estimateAttributes(serverData /*: AttributeMap*/, pendingOps /*: Array<OpsMap>*/, className /*: string*/, id /*: ?string*/) /*: AttributeMap*/{
  const data = {};
  for (var attr in serverData) {
    data[attr] = serverData[attr];
  }
  for (let i = 0; i < pendingOps.length; i++) {
    for (attr in pendingOps[i]) {
      if (pendingOps[i][attr] instanceof _ParseOp.RelationOp) {
        if (id) {
          data[attr] = pendingOps[i][attr].applyTo(data[attr], {
            className: className,
            id: id
          }, attr);
        }
      } else {
        if (attr.includes('.')) {
          // convert a.b.c into { a: { b: { c: value } } }
          const fields = attr.split('.');
          const first = fields[0];
          const last = fields[fields.length - 1];
          data[first] = {
            ...serverData[first]
          };
          let object = {
            ...data
          };
          for (let i = 0; i < fields.length - 1; i++) {
            const key = fields[i];
            if (!(key in object)) {
              object[key] = {};
            }
            object = object[key];
          }
          object[last] = pendingOps[i][attr].applyTo(object[last]);
        } else {
          data[attr] = pendingOps[i][attr].applyTo(data[attr]);
        }
      }
    }
  }
  return data;
}
function nestedSet(obj, key, value) {
  const path = key.split('.');
  for (let i = 0; i < path.length - 1; i++) {
    if (!(path[i] in obj)) obj[path[i]] = {};
    obj = obj[path[i]];
  }
  if (typeof value === 'undefined') {
    delete obj[path[path.length - 1]];
  } else {
    obj[path[path.length - 1]] = value;
  }
}
function commitServerChanges(serverData /*: AttributeMap*/, objectCache /*: ObjectCache*/, changes /*: AttributeMap*/) {
  for (const attr in changes) {
    const val = changes[attr];
    nestedSet(serverData, attr, val);
    if (val && typeof val === 'object' && !(val instanceof _ParseObject.default) && !(val instanceof _ParseFile.default) && !(val instanceof _ParseRelation.default)) {
      const json = (0, _encode.default)(val, false, true);
      objectCache[attr] = JSON.stringify(json);
    }
  }
}