@stnekroman/tstools/dist/decorators/DeferInstanceDecorator.js

Set of handy tools for TypeScript development

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.applyInstanceDecorators = applyInstanceDecorators;
exports.RunInstanceDecorators = RunInstanceDecorators;
exports.DeferInstanceDecorator = DeferInstanceDecorator;
const DeferInstanceDecoratorsMetadataSymbol = Symbol('DeferInstanceDecoratorsMetadata');
function getDeferInstanceDecoratorsMetadata(target) {
    if (target.hasOwnProperty(DeferInstanceDecoratorsMetadataSymbol)) {
        return target[DeferInstanceDecoratorsMetadataSymbol];
    }
    return undefined;
}
function getOrCreateDeferInstanceDecoratorsMetadata(target) {
    let metadata;
    if (target.hasOwnProperty(DeferInstanceDecoratorsMetadataSymbol)) {
        metadata = target[DeferInstanceDecoratorsMetadataSymbol];
    }
    else {
        metadata = {
            decorators: [],
        };
        Object.defineProperty(target, DeferInstanceDecoratorsMetadataSymbol, {
            value: metadata,
        });
    }
    return metadata;
}
function applyInstanceDecorators(instance, ctr, metadata = getDeferInstanceDecoratorsMetadata(ctr.prototype)) {
    if (metadata) {
        for (const [propertyName, decorator] of metadata.decorators) {
            decorator(instance, propertyName, Object.getOwnPropertyDescriptor(instance, propertyName));
        }
    }
}
function RunInstanceDecorators() {
    return (ctr) => {
        const metadata = getDeferInstanceDecoratorsMetadata(ctr.prototype);
        if (!metadata) {
            return ctr;
        }
        const newCtr = class extends ctr {
            constructor(...args) {
                super(...args);
                applyInstanceDecorators(this, ctr, metadata);
            }
        };
        Object.defineProperty(newCtr, 'name', { value: ctr.name });
        return newCtr;
    };
}
function DeferInstanceDecorator(decorator) {
    return (target, propertyName) => {
        const metadata = getOrCreateDeferInstanceDecoratorsMetadata(target);
        metadata.decorators.push([propertyName, decorator]);
    };
}