@m-ld/gateway
Version:
m-ld gateway for services
48 lines • 4.76 kB
JavaScript
import { fetchJson as defaultFetchJson } from '@m-ld/io-web-runtime/dist/server/fetch';
import { AuthKey } from '../lib/index.js';
import { as, validate } from '../lib/validate.js';
export class AblyKeyStore {
constructor(cfg, fetchJson = defaultFetchJson) {
const config = validate(cfg, as.object({
ably: as.object({ apiKey: as.string().required() }).required()
}).unknown());
const [appId] = config.auth.key.split('.');
this.fetchJson = ((path, params, options) => fetchJson(`https://control.ably.net/v1/apps/${appId}/${path}`, params, {
headers: { Authorization: `Bearer ${config.ably.apiKey}` }, ...options
}));
this.domainName = config['@domain'];
}
/**
* @see https://ably.com/docs/api/control-api#tag/keys/paths/~1apps~1{app_id}~1keys/post
*/
async mintKey(name) {
return this.ablyToAuthDetail(await this.fetchJson('keys', {}, {
method: 'POST', body: JSON.stringify({ name, capability: this.keyCapability() })
}));
}
/**
* Note: this call works even if both name and capability are missing; and can
* therefore be used to check if a keyid exists
*
* @see https://ably.com/docs/api/control-api#tag/keys/paths/~1apps~1{app_id}~1keys/post
*/
async pingKey(keyid, getAuthorisedTsIds) {
return this.ablyToAuthDetail(await this.fetchJson(`keys/${keyid}`, {}, {
method: 'PATCH', body: JSON.stringify({
capability: this.keyCapability(...await getAuthorisedTsIds())
})
}));
}
ablyToAuthDetail({ key, name, status }) {
return { key: AuthKey.fromString(key), name, revoked: status === 1 };
}
keyCapability(...tsIds) {
return Object.assign({
// Ably keys must have a capability. Assign a notification channels as a minimum.
[`${this.domainName}:notify`]: ['subscribe']
}, ...tsIds.map(tsId => ({
[`${tsId.toDomain()}:*`]: ['publish', 'subscribe', 'presence']
})));
}
}
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