transformable/dist/esm/decorators.js

Transforms plain objects to class instances and vice versa (a lightweight alternative to 'class-transformer')

import { plainToInstance, instanceToPlain } from './functions';
import { setTransformation } from './storage';
export function Transform(transformation) {
    return function (targetPrototype, attributeName) {
        setTransformation(targetPrototype, attributeName, transformation);
    };
}
export function TransformDate() {
    return Transform({
        input: (sourceDate) => new Date(sourceDate)
    });
}
export function TransformSet() {
    return Transform({
        input: (sourceArray) => new Set(sourceArray),
        output: (sourceSet) => Array.from(sourceSet)
    });
}
export function TransformInstance(classProvider, { excludeOutput = false } = {}) {
    return Transform({
        input: (sourcePlain, { source }) => plainToInstance(sourcePlain, classProvider(), source),
        output: (sourceInstance, { target }) => !excludeOutput ? instanceToPlain(sourceInstance, target) : undefined
    });
}
export function TransformInstances(classProvider, { excludeOutput = false } = {}) {
    return Transform({
        input: (sourcePlains, { source }) => sourcePlains.map((sourcePlain) => plainToInstance(sourcePlain, classProvider(), source)),
        output: (sourceInstances, { target }) => !excludeOutput
            ? sourceInstances.map((sourceInstance) => instanceToPlain(sourceInstance, target))
            : undefined
    });
}
export function ExcludeOutput() {
    return Transform({
        output: (_sourceValue) => undefined
    });
}
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