Upgrade Sugar to Primus 8

- add the Sugar and Primus 8 client libraries to `lib/SugarClient`.
- update `lib/sugar.js` to use the local libraries.
- remove `sugar-client`.

lib/SugarClient/client.js

@@ -0,0 +1,143 @@
+class SugarClient {
+  static initClass() {
+    this.host = null;
+    this.Primus = null;
+  }
+
+  constructor(userId, authToken) {
+    this.primusUrl = this.primusUrl.bind(this);
+    this.connect = this.connect.bind(this);
+    this.disconnect = this.disconnect.bind(this);
+    this.receiveData = this.receiveData.bind(this);
+    this.subscribeTo = this.subscribeTo.bind(this);
+    this.unsubscribeFrom = this.unsubscribeFrom.bind(this);
+    this.on = this.on.bind(this);
+    this.off = this.off.bind(this);
+    this.emit = this.emit.bind(this);
+    this.__subscribeToChannels = this.__subscribeToChannels.bind(this);
+    this.__subscribeTo = this.__subscribeTo.bind(this);
+    this.createEvent = this.createEvent.bind(this);
+    this.userId = userId;
+    this.authToken = authToken;
+    this.events = { };
+    this.subscriptions = { };
+    this.initializePrimus();
+  }
+
+  initializePrimus() {
+    if (SugarClient.Primus == null) { throw 'SugarClient.Primus is not defined'; }
+    if (SugarClient.host == null) { throw 'SugarClient.host is not defined'; }
+    this.primus = SugarClient.Primus.connect(SugarClient.host, {
+      websockets: true,
+      network: true,
+      manual: true
+    }
+    );
+
+    this.primus.on('outgoing::url', this.primusUrl);
+    return this.primus.on('data', this.receiveData);
+  }
+
+  host() {
+    return SugarClient.host;
+  }
+
+  primusUrl(baseUrl) {
+    if (this.userId && this.authToken) {
+      return baseUrl.query = `user_id=${ this.userId }&auth_token=${ this.authToken }`;
+    }
+  }
+
+  connect() {
+    this.disconnect();
+    return this.primus.open();
+  }
+
+  disconnect() {
+    let key;
+    let userKeys = [];
+    userKeys = ((() => {
+      const result = [];
+      for (key in this.subscriptions) {
+        const _ = this.subscriptions[key];
+        if (key.match(/^(session|user):/i)) {
+          result.push(key);
+        }
+      }
+      return result;
+    })());
+    for (key of userKeys) { delete this.subscriptions[key]; }
+    this.userKey = (this.loggedIn = null);
+    return this.primus.end();
+  }
+
+  receiveData(data) {
+    if (data.type === 'connection') {
+      if (console && console.info) {
+        console.info('[CONNECTED] ', data);
+      }
+      this.loggedIn = data.loggedIn;
+      this.userKey = data.userKey;
+      this.subscriptions[this.userKey] = true;
+      return setTimeout(this.__subscribeToChannels, 100);
+    } else {
+      return this.emit(data);
+    }
+  }
+
+  subscribeTo(channel) {
+    if (this.subscriptions[channel]) { return false; }
+    this.subscriptions[channel] = true;
+    return this.__subscribeTo(channel);
+  }
+
+  unsubscribeFrom(channel) {
+    if (!this.subscriptions[channel]) { return; }
+    delete this.subscriptions[channel];
+    return this.primus.write({action: 'Unsubscribe', params: { channel }});
+  }
+
+  on(type, callback) {
+    if (!this.events[type]) { this.events[type] = []; }
+    return this.events[type].push(callback);
+  }
+
+  off(type, callback) {
+    if (callback && this.events[type]) {
+      return this.events[type] = this.events[type].filter(cb => cb !== callback);
+    } else {
+      return delete this.events[type];
+    }
+  }
+
+  emit(data) {
+    const callbacks = this.events[data.type] || [];
+    return callbacks.map((callback) => callback(data));
+  }
+
+  __subscribeToChannels() {
+    return (() => {
+      const result = [];
+      for (let channel in this.subscriptions) {
+        const _ = this.subscriptions[channel];
+        result.push(this.__subscribeTo(channel));
+      }
+      return result;
+    })();
+  }
+
+  __subscribeTo(channel) {
+    return this.primus.write({action: 'Subscribe', params: { channel }});
+  }
+
+  createEvent(type, channel, data) {
+    return this.primus.write({
+      action: 'Event',
+      params: { type, channel, data }});
+  }
+}
+SugarClient.initClass();
+
+if (typeof module !== 'undefined' && module !== null) {
+  module.exports = SugarClient;
+}