owltech
Version:
This a backend for OwlTech Company
70 lines • 2.24 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const metadata_1 = require("./metadata");
/**
* A class that represents a generic method of adding authentication-related
* metadata on a per-request basis.
*/
class CallCredentials {
/**
* Creates a new CallCredentials object from a given function that generates
* Metadata objects.
* @param metadataGenerator A function that accepts a set of options, and
* generates a Metadata object based on these options, which is passed back
* to the caller via a supplied (err, metadata) callback.
*/
static createFromMetadataGenerator(metadataGenerator) {
return new SingleCallCredentials(metadataGenerator);
}
static createEmpty() {
return new EmptyCallCredentials();
}
}
exports.CallCredentials = CallCredentials;
class ComposedCallCredentials extends CallCredentials {
constructor(creds) {
super();
this.creds = creds;
}
async generateMetadata(options) {
const base = new metadata_1.Metadata();
const generated = await Promise.all(this.creds.map((cred) => cred.generateMetadata(options)));
for (const gen of generated) {
base.merge(gen);
}
return base;
}
compose(other) {
return new ComposedCallCredentials(this.creds.concat([other]));
}
}
class SingleCallCredentials extends CallCredentials {
constructor(metadataGenerator) {
super();
this.metadataGenerator = metadataGenerator;
}
generateMetadata(options) {
return new Promise((resolve, reject) => {
this.metadataGenerator(options, (err, metadata) => {
if (metadata !== undefined) {
resolve(metadata);
}
else {
reject(err);
}
});
});
}
compose(other) {
return new ComposedCallCredentials([this, other]);
}
}
class EmptyCallCredentials extends CallCredentials {
generateMetadata(options) {
return Promise.resolve(new metadata_1.Metadata());
}
compose(other) {
return other;
}
}
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