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utils.ts
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utils.ts
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import * as i from './interfaces';
import { isString } from '../strings';
import { isNumber } from '../numbers';
export function defineEntityProperties(entity: unknown): void {
Object.defineProperty(entity, i.__IS_DATAENTITY_KEY, {
value: true,
configurable: false,
enumerable: false,
writable: false,
});
Object.defineProperty(entity, i.__ENTITY_METADATA_KEY, {
value: {},
configurable: false,
enumerable: false,
writable: false,
});
}
export function createMetadata<M>(metadata: M): i._DataEntityMetadata<M> {
return { ...createCoreMetadata(), ...metadata } as i._DataEntityMetadata<M>;
}
export function makeMetadata<M extends i._DataEntityMetadataType>(
metadata?: M|undefined
): i._DataEntityMetadata<M> {
if (!metadata) return createCoreMetadata();
return createMetadata(metadata);
}
export function createCoreMetadata<M extends i._DataEntityMetadataType>(
): i._DataEntityMetadata<M> {
return { _createTime: Date.now() } as i._DataEntityMetadata<M>;
}
export function jsonToBuffer(input: unknown): Buffer {
return Buffer.from(JSON.stringify(input));
}
export function isValidKey(key: unknown): key is string|number {
if (key == null) return false;
if (isString(key) && key !== '') return true;
if (isNumber(key)) return true;
return false;
}
export function isDataEntity(input: unknown): boolean {
return Boolean(input != null && (input as any)[i.__IS_DATAENTITY_KEY] === true);
}