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import DataField from "./DataField";
import DataRecordDescriptor from "./DataRecordDescriptor";
import { DataFieldDescriptor, DataProvider, DataSetter } from "./interfaces";
import areEqual from "../../areEqual";
/**
* The collection of data fields
*/
export default class DataRecord implements DataProvider, DataSetter, Subscriber {
private _fields: Record<string, DataField> = {};
private _modifiedFields: Record<string, DataField> = {};
private _recordDescriptor: DataRecordDescriptor;
/**
* The cached id of the record
*/
private _id: any;
/**
* The cached data of the record
*/
private _data?: any = undefined;
constructor(recordDescriptor?: DataRecordDescriptor) {
this._recordDescriptor = recordDescriptor ?? new DataRecordDescriptor();
this._recordDescriptor.fieldDescriptors.forEach(fd => this._fields[fd.name] = new DataField(fd, this));
}
addField(fd: DataFieldDescriptor): DataField {
this._recordDescriptor.addFieldDescriptor(fd);
this._fields[fd.name] = new DataField(fd, this);
return this._fields[fd.name];
}
getField(name: string) {
return this._fields[name];
}
removeField(fd: DataFieldDescriptor) {
this._recordDescriptor.removeFieldDescriptor(fd);
delete this._fields[fd.name];
}
/**
* Initializes the data record with the data passed in that matches the field descriptors
* If the property of the data is not described in the field descriptor, it will be ignored
* @param data The data to initialize the data record with
*/
initialize(data: any) {
const {
_fields
} = this;
for (const key in data) {
Eif (data.hasOwnProperty(key)) {
Eif (_fields.hasOwnProperty(key)) { // The field exists, initialize it
_fields[key].initialize(data[key]);
}
else {
console.warn(`There is no field for property: '${key}' that was passed as data`);
}
}
}
this._id = undefined;
this._data = undefined;
this._modifiedFields = {};
}
getData(): any {
const {
_data,
_fields
} = this;
if (_data !== undefined) {
return _data;
}
const data: any = {};
for (const key in _fields) {
Eif (_fields.hasOwnProperty(key)) {
const value = _fields[key].value;
if (value != undefined && value != null) {
data[key] = value;
}
}
}
this._data = data;
return data;
}
set id(id: any) {
this._id = id;
}
get id() {
const {
_fields
} = this;
Eif (this._id === undefined) {
const idInfo = this._recordDescriptor.getId(_fields, (f: { value: any; }) => f.value);
this._id = idInfo.value;
}
return this._id;
}
get isModified() {
return Object.keys(this._modifiedFields).length > 0;
}
setData(data: Record<string, any>): void {
for (const key in data) {
Eif (data.hasOwnProperty(key)) {
const field = this._fields[key];
Eif (field !== undefined) {
field.value = data[key];
}
else { // The field does not need to exist for the given data member but let the programmer know it is missing
console.warn(`Field of name: '${key}' was not found for data memeber with same name`);
}
}
}
this._id = undefined;
}
reset() {
if (!this.isModified) {
return;
}
const {
_fields
} = this;
for (const key in _fields) {
Eif (_fields.hasOwnProperty(key)) {
_fields[key].reset();
}
}
//this._modifiedFields = {}; It should be empty
}
onValueSet(descriptor: DataFieldDescriptor, value: any, oldValue: any, initialValue: any) {
if (areEqual(value, oldValue)) {
return; // Nothing to change
}
const {
name
} = descriptor;
const {
_fields,
_modifiedFields
} = this;
if (!areEqual(value, initialValue)) {
// Reference the field in the modified set
_modifiedFields[name] = _fields[name];
}
else {
// Remove it from the modified fields
delete _modifiedFields[name];
}
// Clear the data cache to get new data
this._data = undefined;
}
// commit(callback: (record: any) => void) {
// if (!this.isModified) {
// return;
// }
// callback(this._data);
// this.initialize(this._data);
// }
} |