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/*! Copyright (c) 2021 Siemens AG. Licensed under the MIT License. */
Object.defineProperty(exports, "__esModule", { value: true });
exports.SubscriptionManager = void 0;
const uuid_1 = require("uuid");
const mqtt_utils_1 = require("./mqtt-utils");
class SubscriptionManager {
constructor(topicFormat, interfaceName, protocolVersion) {
this._subscriptions = new Map();
this._subscriptionIds = new Map();
this._compileMqttTopic(topicFormat, interfaceName, protocolVersion);
}
getMqttTopic(topic, subject) {
var _a, _b;
return this._constructMqttTopic((_a = subject.manufacturer) !== null && _a !== void 0 ? _a : "+", (_b = subject.serialNumber) !== null && _b !== void 0 ? _b : "+", topic !== null && topic !== void 0 ? topic : "+");
}
getMqttTopicUtf8Length(topic, subject) {
var _a, _b;
return this._getMqttTopicUtf8Length((_a = subject.manufacturer) !== null && _a !== void 0 ? _a : "+", (_b = subject.serialNumber) !== null && _b !== void 0 ? _b : "+", topic !== null && topic !== void 0 ? topic : "+");
}
clear() {
this._subscriptions.clear();
this._subscriptionIds.clear();
}
add(topic, subject, handler) {
(0, mqtt_utils_1.assertMqttTopicUtf8Count)(this.getMqttTopicUtf8Length(topic, subject));
const id = (0, uuid_1.v4)();
const path = [subject.manufacturer, subject.serialNumber, topic];
let pathIndex = path.length - 1;
let map = this._subscriptions;
while (pathIndex !== -1) {
const key = path[pathIndex];
let value = map.get(key);
if (value === undefined) {
value = new Map();
map.set(key, value);
}
map = value;
pathIndex--;
}
this._subscriptionIds.set(id, map);
map.set(id, handler);
if (map.size === 1) {
const mqttTopic = map["mqttTopic"] = this.getMqttTopic(topic, subject);
return { id, mqttTopic, requiresSubscribe: true };
}
return { id, mqttTopic: map["mqttTopic"], requiresSubscribe: false };
}
remove(id) {
const subIdsMap = this._subscriptionIds.get(id);
if (subIdsMap === undefined || !subIdsMap.has(id)) {
return undefined;
}
subIdsMap.delete(id);
return {
mqttTopic: subIdsMap["mqttTopic"],
requiresUnsubscribe: subIdsMap.size === 0,
};
}
getAll() {
const mqttTopics = [];
const walk = (map) => {
const mqttTopic = map["mqttTopic"];
if (mqttTopic !== undefined) {
if (map.size > 0) {
mqttTopics.push(mqttTopic);
}
return;
}
map.forEach(subMap => walk(subMap));
};
walk(this._subscriptions);
return mqttTopics;
}
find(mqttTopic, subject) {
const path = this._deconstructMqttTopic(mqttTopic);
if (path[0] === undefined) {
path[0] = subject.manufacturer;
}
if (path[1] === undefined) {
path[1] = subject.serialNumber;
}
return [this._findInternal(this._subscriptions, path, path.length - 1), path[2]];
}
*_findInternal(map, path, pathIndex) {
if (pathIndex === -1) {
yield* map.entries();
return;
}
const key = path[pathIndex];
let value = map.get(key);
if (value !== undefined) {
yield* this._findInternal(value, path, pathIndex - 1);
}
value = map.get(undefined);
if (value !== undefined) {
yield* this._findInternal(value, path, pathIndex - 1);
}
}
_compileMqttTopic(topicFormat, interfaceName, protocolVersion) {
const majorVersion = `v${protocolVersion.substring(0, protocolVersion.indexOf("."))}`;
const placeholders = ["%interfaceName%", "%majorVersion%", "%manufacturer%", "%serialNumber%", "%topic%"];
const levels = topicFormat.split("/");
const indices = placeholders.map(p => levels.indexOf(p));
for (let i = 0; i < indices.length; i++) {
if (levels.some((l, li) => l.search(placeholders[i]) !== -1 && li !== indices[i])) {
throw new Error(`Invalid topic format: ${placeholders[i]} placeholder not a complete topic level or specified multiple times`);
}
}
if (indices[4] === -1) {
throw new Error("Invalid topic format: %topic% placeholder is missing");
}
this._constructMqttTopic = (manufacturer, serialNumber, topic) => {
levels[indices[0]] = interfaceName;
levels[indices[1]] = majorVersion;
levels[indices[2]] = manufacturer;
levels[indices[3]] = serialNumber;
levels[indices[4]] = topic;
return levels.join("/");
};
this._deconstructMqttTopic = (mqttTopic) => {
const mqttLevels = mqttTopic.split("/");
return [
mqttLevels[indices[2]],
mqttLevels[indices[3]],
mqttLevels[indices[4]],
];
};
this._getMqttTopicUtf8Length = (manufacturer, serialNumber, topic) => {
levels[indices[0]] = interfaceName;
levels[indices[1]] = majorVersion;
levels[indices[2]] = manufacturer;
levels[indices[3]] = serialNumber;
levels[indices[4]] = topic;
return levels.reduce((prev, cur, index, arr) => prev + (0, mqtt_utils_1.getUtf8BytesCount)(cur) + (index === arr.length - 1 ? 0 : 1), 0);
};
}
}
exports.SubscriptionManager = SubscriptionManager;
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