| 1 | const Gateway = require('./Gateway');
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| 2 |
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| 3 | /**
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| 4 | * An authenticator service. It its simplest form, it managing
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| 5 | * gateways.
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| 6 | */
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| 7 | class Authenticator {
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| 8 | constructor() {
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| 9 | this.gateways = new Map();
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| 10 | }
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| 11 |
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| 12 | /**
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| 13 | *
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| 14 | * @param gateway
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| 15 | * @param protocol
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| 16 | * @param provider
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| 17 | */
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| 18 | gate(gateway, protocol, provider) {
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| 19 | this.gateways.set(gateway, new Gateway(protocol, provider));
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| 20 | }
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| 21 |
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| 22 | /**
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| 23 | * Authenticate a context by a given gateway.
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| 24 | *
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| 25 | * @param gateway
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| 26 | * @param context
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| 27 | * @return {Promise<void>}
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| 28 | */
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| 29 | authenticate(gateway, context) {
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| 30 | return this.gateways.get(gateway).authenticate(context);
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| 31 | }
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| 32 |
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| 33 | /**
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| 34 | * Returning a connection which can be used to mount to
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| 35 | * the transport layer.
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| 36 | *
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| 37 | * Normally, we need to authenticate over Http, then guard() will
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| 38 | * return a middleware.
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| 39 | *
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| 40 | * If we authenticate over Socket, then guard() will return the
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| 41 | * socket connection middleware.
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| 42 | *
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| 43 | * @param gateway
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| 44 | * @return {mount}
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| 45 | */
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| 46 | guard(gateway) {
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| 47 | const protocol = this.gateways.get(gateway).protocol;
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| 48 | if ('function' !== typeof protocol.mount) {
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| 49 | throw new Error(
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| 50 | `The protocol [${protocol.constructor.name}] of the gateway [${gateway}]` +
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| 51 | `does not support mounting to a framework.`
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| 52 | );
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| 53 | }
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| 54 | return this.gateways.get(gateway).protocol.mount((context => {
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| 55 | return this.authenticate(gateway, context);
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| 56 | }));
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| 57 | }
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| 58 | }
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| 59 |
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| 60 | module.exports = Authenticator;
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