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import defaultValueConverter from "../converter/defaultValueConverter";
//import RecordValidator from "../validation/validators/record/RecordValidator";
class RecordValidator {
}
function getType(value: any): Function {
const type = typeof value;
switch (type) {
case 'boolean': return Boolean;
case 'number': return Number;
case 'bigint': return BigInt;
case 'string': return String;
case 'object': {
if (value instanceof Date) {
return Date;
}
else {
throw Error(`Not implemented for type: '${type}'`);
}
}
default: throw Error(`Not implemented for type: '${type}'`);
// "symbol" | "undefined" | "function"
}
}
export default class DataRecordDescriptor {
/**
* The descriptors of the field of the record
*/
private _fieldDescriptors: DataFieldDescriptor[] = [];
private _recordValidators?: RecordValidator[];
get fieldDescriptors() {
return this._fieldDescriptors;
}
get recordValidators() {
return this._recordValidators;
}
getFieldDescriptor(name: string): DataFieldDescriptor | undefined {
const descriptors = this._fieldDescriptors.filter(d => d.name === name);
return descriptors.length > 0 ?
descriptors[0] :
undefined;
}
/**
* Creates the record descriptor from a model
* @param model
*/
fromModel(model: Record<string, DataFieldModel>, ...recordValidators: RecordValidator[]): void {
for (const key in model) {
Eif (model.hasOwnProperty(key)) {
const {
isId,
type,
value,
converter
} = model[key];
this.addFieldDescriptor({
name: key,
isId: isId ?? false,
type: type !== undefined ? type : value !== undefined ?
getType(value) : String,
value,
converter: converter || defaultValueConverter
});
}
}
this._recordValidators = recordValidators;
}
addFieldDescriptor(fd: DataFieldDescriptor): void {
// Set the default converter if none are provided
Iif (fd.converter === undefined) {
fd.converter = defaultValueConverter;
}
this._fieldDescriptors.push(fd);
}
removeFieldDescriptor(fd: DataFieldDescriptor): void {
const index = this._fieldDescriptors.indexOf(fd);
if (index > -1) {
this._fieldDescriptors.splice(index, 1);
}
}
/**
* Creates an id object from the data using the field descriptors id property
* @param data
* @param fcn A function to process the data further if necessary
*/
getId(data: any, fcn?: Function): IdentifierInfo {
const id: Record<string, any> = {};
const idDescriptors = this._fieldDescriptors.filter(f => f.isId === true);
const { length } = idDescriptors;
let hasUndefinedIdentifiers = false;
if (length > 0) { // There are some field(s) that compose an identifier
for (let i = 0; i < length; ++i) {
const descriptor = idDescriptors[i];
const {
name
} = descriptor;
if (data.hasOwnProperty(name)) {
const value = fcn !== undefined ? fcn(data[name]) : data[name];
if (value === undefined) {
hasUndefinedIdentifiers = true;
break;
}
id[name] = value;
}
else { // No data property for that id descriptor
id[name] = undefined;
hasUndefinedIdentifiers = true;
break;
}
}
if (hasUndefinedIdentifiers) { // No field serves a an identifier, create one using all the fields for (hopefully) uniqueness
for (const key in data) {
Eif (data.hasOwnProperty(key)) {
const value = fcn !== undefined ? fcn(data[key]) : data[key];
id[key] = value;
}
}
}
}
else { // No field serves a an identifier, create one using all the fields for (hopefully) uniqueness
for (const key in data) {
Eif (data.hasOwnProperty(key)) {
const value = fcn !== undefined ? fcn(data[key]) : data[key];
id[key] = value;
}
}
}
return {
value: id,
noDescriptorsId: length === 0,
hasUndefinedIdentifiers: length > 0 && hasUndefinedIdentifiers === true
};
}
} |