@nestjs/common
Version:
Nest - modern, fast, powerful node.js web framework (@common)
36 lines (35 loc) • 1.4 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getInjectionProviders = getInjectionProviders;
const shared_utils_1 = require("../../utils/shared.utils");
/**
* @param value
* @returns `true` if value is `OptionalFactoryDependency`
*/
function isOptionalFactoryDependency(value) {
return (!(0, shared_utils_1.isUndefined)(value.token) &&
!(0, shared_utils_1.isUndefined)(value.optional) &&
!value.prototype);
}
const mapInjectToTokens = (t) => isOptionalFactoryDependency(t) ? t.token : t;
/**
*
* @param providers List of a module's providers
* @param tokens Injection tokens needed for a useFactory function (usually the module's options' token)
* @returns All the providers needed for the tokens' injection (searched recursively)
*/
function getInjectionProviders(providers, tokens) {
const result = [];
let search = tokens.map(mapInjectToTokens);
while (search.length > 0) {
const match = (providers ?? []).filter(p => !result.includes(p) && // this prevents circular loops and duplication
(search.includes(p) || search.includes(p?.provide)));
result.push(...match);
// get injection tokens of the matched providers, if any
search = match
.filter(p => p?.inject)
.flatMap(p => p.inject)
.map(mapInjectToTokens);
}
return result;
}