@cisstech/nge
Version:
NG Essentials is a collection of libraries for Angular developers.
162 lines • 20 kB
JavaScript
import { deepCopy } from './copy';
class Serializer {
static serialize(instance) {
const record = {};
const prototype = instance.constructor.prototype;
const properties = prototype.__properties_infos__;
Object.keys(properties).forEach((propertyName) => {
if (!(propertyName in instance)) {
return;
}
const property = properties[propertyName];
const exportName = (property.aliases ?? []).pop() ?? propertyName;
const value = instance[propertyName];
if (value == null) {
return;
}
switch (typeof value) {
case 'string':
case 'number':
case 'boolean':
if (value != null) {
record[exportName] = value;
}
break;
case 'object':
if (property.type) {
if (Array.isArray(value)) {
record[exportName] = value
.map((e) => {
return Serializer.serialize(e);
})
.filter((e) => e != null);
}
else if (property.indexed) {
record[exportName] = Object.keys(value).reduce((obj, key) => {
if (value[key] === undefined) {
return obj;
}
obj[key] = Serializer.serialize(value[key]);
return obj;
}, {});
}
else {
record[exportName] = Serializer.serialize(value);
}
}
else {
if (Array.isArray(value)) {
record[exportName] = value.filter((obj) => obj != null);
}
else {
record[exportName] = deepCopy(value);
}
}
break;
}
});
return record;
}
static deserialize(target, props) {
const record = {
...props,
};
const prototype = target.prototype;
const info = prototype.__class_info__;
if (info.resolver) {
target = info.resolver(props);
}
const properties = prototype.__properties_infos__;
Object.keys(properties).forEach((propertyName) => {
const property = properties[propertyName];
const aliases = property.aliases ?? [];
const value = props[propertyName] ??
Object.keys(props).find((k) => {
return !!aliases.find((alias) => alias === k);
});
if (value == null) {
return;
}
switch (typeof value) {
case 'object':
if (property.type) {
if (Array.isArray(value)) {
record[propertyName] = value.map((e) => {
return Serializer.deserialize(property.type, e);
});
}
else if (property.indexed) {
Object.keys(value).forEach((k) => {
value[k] = Serializer.deserialize(property.type, value[k]);
});
record[propertyName] = value;
}
else {
record[propertyName] = Serializer.deserialize(property.type, value);
}
}
else {
record[propertyName] = value;
}
break;
default:
record[propertyName] = value;
break;
}
});
return new target(record);
}
}
export class Builder {
/**
* Creates new instance of `T` class.
* @param props properties to pass to the constructor of the instance.
* @returns new instance of `T`
*/
// eslint-disable-next-line @typescript-eslint/no-unused-vars
static create(props) {
throw new Error('This is an abstract method. It needs to be overridden.');
}
save() {
throw new Error('This is an abstract method. It needs to be overridden.');
}
// eslint-disable-next-line @typescript-eslint/no-unused-vars
with(props) {
throw new Error('This is an abstract method. It needs to be overridden.');
}
}
export function Entity(info) {
return function (target) {
const prototype = target.prototype;
info = info ?? {};
prototype.__class_info__ = prototype.__class_info__ ?? info;
prototype.__class_info__ = {
...prototype.__class_info__,
...info,
};
prototype.save = function () {
return Serializer.serialize(this);
};
prototype.with = function (props) {
return new target({
...this,
...props,
});
};
target.create = function (props) {
return Serializer.deserialize(target, props);
};
return target;
};
}
export function Property(info) {
return (instance, name) => {
info = info ?? {
aliases: [],
};
const prototype = instance.constructor.prototype;
prototype.__properties_infos__ = prototype.__properties_infos__ ?? {};
prototype.__properties_infos__[name] = info;
};
}
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{ deepCopy } from './copy'\n\ninterface ClassInfo {\n  resolver?: (props: Record<string, any>) => Function\n}\n\ninterface PropertyInfo {\n  type?: Function\n  indexed?: boolean\n  aliases?: string[]\n}\n\nclass Serializer {\n  static serialize(instance: any): Record<string, any> {\n    const record: Record<string, any> = {}\n    const prototype = instance.constructor.prototype\n    const properties: Record<string, PropertyInfo> = prototype.__properties_infos__\n\n    Object.keys(properties).forEach((propertyName) => {\n      if (!(propertyName in instance)) {\n        return\n      }\n\n      const property = properties[propertyName]\n      const exportName = (property.aliases ?? []).pop() ?? propertyName\n\n      const value = instance[propertyName]\n      if (value == null) {\n        return\n      }\n      switch (typeof value) {\n        case 'string':\n        case 'number':\n        case 'boolean':\n          if (value != null) {\n            record[exportName] = value\n          }\n          break\n        case 'object':\n          if (property.type) {\n            if (Array.isArray(value)) {\n              record[exportName] = value\n                .map((e) => {\n                  return Serializer.serialize(e)\n                })\n                .filter((e) => e != null)\n            } else if (property.indexed) {\n              record[exportName] = Object.keys(value).reduce(\n                (obj, key) => {\n                  if (value[key] === undefined) {\n                    return obj\n                  }\n                  obj[key] = Serializer.serialize(value[key])\n                  return obj\n                },\n                {} as Record<string, any>\n              )\n            } else {\n              record[exportName] = Serializer.serialize(value)\n            }\n          } else {\n            if (Array.isArray(value)) {\n              record[exportName] = value.filter((obj) => obj != null)\n            } else {\n              record[exportName] = deepCopy(value)\n            }\n          }\n          break\n      }\n    })\n    return record\n  }\n\n  static deserialize(target: any, props: Record<string, any>) {\n    const record: Record<string, any> = {\n      ...props,\n    }\n    const prototype = target.prototype\n    const info: ClassInfo = prototype.__class_info__\n    if (info.resolver) {\n      target = info.resolver(props)\n    }\n\n    const properties: Record<string, PropertyInfo> = prototype.__properties_infos__\n    Object.keys(properties).forEach((propertyName) => {\n      const property = properties[propertyName]\n      const aliases = property.aliases ?? []\n      const value =\n        props[propertyName] ??\n        Object.keys(props).find((k) => {\n          return !!aliases.find((alias) => alias === k)\n        })\n\n      if (value == null) {\n        return\n      }\n\n      switch (typeof value) {\n        case 'object':\n          if (property.type) {\n            if (Array.isArray(value)) {\n              record[propertyName] = value.map((e) => {\n                return Serializer.deserialize(property.type, e)\n              })\n            } else if (property.indexed) {\n              Object.keys(value).forEach((k) => {\n                value[k] = Serializer.deserialize(property.type, value[k])\n              })\n              record[propertyName] = value\n            } else {\n              record[propertyName] = Serializer.deserialize(property.type, value)\n            }\n          } else {\n            record[propertyName] = value\n          }\n          break\n        default:\n          record[propertyName] = value\n          break\n      }\n    })\n    return new target(record)\n  }\n}\n\nexport class Builder<T> {\n  /**\n   * Creates new instance of `T` class.\n   * @param props properties to pass to the constructor of the instance.\n   * @returns new instance of `T`\n   */\n  // eslint-disable-next-line @typescript-eslint/no-unused-vars\n  static create<T>(props: Partial<T>): T {\n    throw new Error('This is an abstract method. It needs to be overridden.')\n  }\n\n  save(): Record<keyof T, any> {\n    throw new Error('This is an abstract method. It needs to be overridden.')\n  }\n\n  // eslint-disable-next-line @typescript-eslint/no-unused-vars\n  with(props: Partial<T>): T {\n    throw new Error('This is an abstract method. It needs to be overridden.')\n  }\n}\n\nexport function Entity(info?: ClassInfo): ClassDecorator {\n  return function (target: any) {\n    const prototype = target.prototype\n    info = info ?? {}\n    prototype.__class_info__ = prototype.__class_info__ ?? info\n    prototype.__class_info__ = {\n      ...prototype.__class_info__,\n      ...info,\n    }\n\n    prototype.save = function () {\n      return Serializer.serialize(this)\n    }\n\n    prototype.with = function (props: any) {\n      return new target({\n        ...this,\n        ...props,\n      })\n    }\n\n    target.create = function (props: Record<string, any>) {\n      return Serializer.deserialize(target, props)\n    }\n    return target\n  }\n}\n\nexport function Property(info?: PropertyInfo): PropertyDecorator {\n  return (instance: any, name: string | symbol) => {\n    info = info ?? {\n      aliases: [],\n    }\n\n    const prototype = instance.constructor.prototype\n    prototype.__properties_infos__ = prototype.__properties_infos__ ?? {}\n    prototype.__properties_infos__[name] = info\n  }\n}\n"]}