naf-firebase-adapter.min.js.map

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0);\n","const firebaseKeyEncode = require(\"firebase-key-encode\");\nconst WebRtcPeer = require(\"./WebRtcPeer\");\n\nclass FirebaseWebRtcAdapter {\n  /**\n    Config structure:\n    config.authType: none;\n    config.apiKey: your-api;\n    config.authDomain: your-project.firebaseapp.com;\n    config.databaseURL: https://your-project.firebaseio.com;\n  */\n  constructor(firebase, config) {\n    this.rootPath = \"networked-aframe\";\n\n    this.localId = null;\n    this.appId = null;\n    this.roomId = null;\n\n    this.peers = {}; // id -> WebRtcPeer\n    this.occupants = {}; // id -> joinTimestamp\n\n    this.serverTimeRequests = 0;\n    this.timeOffsets = [];\n    this.avgTimeOffset = 0;\n\n    config = config || window.firebaseConfig;\n    this.firebase = firebase || window.firebase;\n\n    if (this.firebase === undefined) {\n      throw new Error(\n        \"Import https://www.gstatic.com/firebasejs/x.x.x/firebase.js\"\n      );\n    }\n\n    this.authType = config.authType;\n    this.apiKey = config.apiKey;\n    this.authDomain = config.authDomain;\n    this.databaseURL = config.databaseURL;\n  }\n\n  /*\n   * Call before `connect`\n   */\n\n  setServerUrl(url) {\n    // handled in config\n  }\n\n  setApp(appId) {\n    this.appId = appId;\n  }\n\n  setRoom(roomId) {\n    this.roomId = roomId;\n  }\n\n  // options: { datachannel: bool, audio: bool }\n  setWebRtcOptions(options) {\n    // TODO: support audio and video\n    if (options.datachannel === false)\n      NAF.log.warn(\n        \"FirebaseWebRtcAdapter.setWebRtcOptions: datachannel must be true.\"\n      );\n    if (options.audio === true)\n      NAF.log.warn(\"FirebaseWebRtcAdapter does not support audio yet.\");\n    if (options.video === true)\n      NAF.log.warn(\"FirebaseWebRtcAdapter does not support video yet.\");\n  }\n\n  setServerConnectListeners(successListener, failureListener) {\n    this.connectSuccess = successListener;\n    this.connectFailure = failureListener;\n  }\n\n  setRoomOccupantListener(occupantListener) {\n    this.occupantListener = occupantListener;\n  }\n\n  setDataChannelListeners(openListener, closedListener, messageListener) {\n    this.openListener = openListener;\n    this.closedListener = closedListener;\n    this.messageListener = function(remoteId, dataType, data) {\n      var decodedData = firebaseKeyEncode.deepDecode(data);\n      messageListener(remoteId, dataType, decodedData);\n    };\n  }\n\n  connect() {\n    var self = this;\n\n    this.initFirebase(function(id) {\n      self.updateTimeOffset();\n\n      self.localId = id;\n      var firebaseApp = self.firebaseApp;\n\n      // Note: assuming that data transfer via firebase realtime database\n      //       is reliable and in order\n      // TODO: can race among peers? If so, fix\n\n      self.getTimestamp(function(timestamp) {\n        self.myRoomJoinTime = timestamp;\n\n        var userRef = firebaseApp\n          .database()\n          .ref(self.getUserPath(self.localId));\n        userRef.set({ timestamp: timestamp, signal: \"\", data: \"\" });\n        userRef.onDisconnect().remove();\n\n        var roomRef = firebaseApp.database().ref(self.getRoomPath());\n\n        roomRef.on(\"child_added\", function(data) {\n          var remoteId = data.key;\n\n          if (\n            remoteId === self.localId ||\n            remoteId === \"timestamp\" ||\n            self.peers[remoteId] !== undefined\n          )\n            return;\n\n          var remoteTimestamp = data.val().timestamp;\n\n          var peer = new WebRtcPeer(\n            self.localId,\n            remoteId,\n            // send signal function\n            function(data) {\n              firebaseApp\n                .database()\n                .ref(self.getSignalPath(self.localId))\n                .set(data);\n            }\n          );\n          peer.setDatachannelListeners(\n            self.openListener,\n            self.closedListener,\n            self.messageListener\n          );\n\n          self.peers[remoteId] = peer;\n          self.occupants[remoteId] = remoteTimestamp;\n\n          // received signal\n          firebaseApp\n            .database()\n            .ref(self.getSignalPath(remoteId))\n            .on(\"value\", function(data) {\n              var value = data.val();\n              if (value === null || value === \"\") return;\n              peer.handleSignal(value);\n            });\n\n          // received data\n          firebaseApp\n            .database()\n            .ref(self.getDataPath(remoteId))\n            .on(\"value\", function(data) {\n              var value = data.val();\n              if (value === null || value === \"\" || value.to !== self.localId)\n                return;\n              self.messageListener(remoteId, value.type, value.data);\n            });\n\n          // send offer from a peer who\n          //   - later joined the room, or\n          //   - has larger id if two peers joined the room at same time\n          if (\n            timestamp > remoteTimestamp ||\n            (timestamp === remoteTimestamp && self.localId > remoteId)\n          )\n            peer.offer();\n\n          self.occupantListener(self.occupants);\n        });\n\n        roomRef.on(\"child_removed\", function(data) {\n          var remoteId = data.key;\n\n          if (\n            remoteId === self.localId ||\n            remoteId === \"timestamp\" ||\n            self.peers[remoteId] === undefined\n          )\n            return;\n\n          delete self.peers[remoteId];\n          delete self.occupants[remoteId];\n\n          self.occupantListener(self.occupants);\n        });\n\n        self.connectSuccess(self.localId);\n      });\n    });\n  }\n\n  shouldStartConnectionTo(client) {\n    return (this.myRoomJoinTime || 0) <= (client ? client.roomJoinTime : 0);\n  }\n\n  startStreamConnection(clientId) {\n    // Handled by WebRtcPeer\n  }\n\n  closeStreamConnection(clientId) {\n    // Handled by WebRtcPeer\n  }\n\n  sendData(clientId, dataType, data) {\n    this.peers[clientId].send(dataType, data);\n  }\n\n  sendDataGuaranteed(clientId, dataType, data) {\n    var clonedData = JSON.parse(JSON.stringify(data));\n    var encodedData = firebaseKeyEncode.deepEncode(clonedData);\n    this.firebaseApp\n      .database()\n      .ref(this.getDataPath(this.localId))\n      .set({\n        to: clientId,\n        type: dataType,\n        data: encodedData\n      });\n  }\n\n  broadcastData(dataType, data) {\n    for (var clientId in this.peers) {\n      if (this.peers.hasOwnProperty(clientId)) {\n        this.sendData(clientId, dataType, data);\n      }\n    }\n  }\n\n  broadcastDataGuaranteed(dataType, data) {\n    for (var clientId in this.peers) {\n      if (this.peers.hasOwnProperty(clientId)) {\n        this.sendDataGuaranteed(clientId, dataType, data);\n      }\n    }\n  }\n\n  getConnectStatus(clientId) {\n    var peer = this.peers[clientId];\n\n    if (peer === undefined) return NAF.adapters.NOT_CONNECTED;\n\n    switch (peer.getStatus()) {\n      case WebRtcPeer.IS_CONNECTED:\n        return NAF.adapters.IS_CONNECTED;\n\n      case WebRtcPeer.CONNECTING:\n        return NAF.adapters.CONNECTING;\n\n      case WebRtcPeer.NOT_CONNECTED:\n      default:\n        return NAF.adapters.NOT_CONNECTED;\n    }\n  }\n\n  getMediaStream(clientId) { return Promise.reject(\"Interface method not implemented: getMediaStream\")}\n\n  /*\n   * Privates\n   */\n\n  initFirebase(callback) {\n    this.firebaseApp = this.firebase.initializeApp(\n      {\n        apiKey: this.apiKey,\n        authDomain: this.authDomain,\n        databaseURL: this.databaseURL\n      },\n      this.appId\n    );\n\n    this.auth(this.authType, callback);\n  }\n\n  auth(type, callback) {\n    switch (type) {\n      case \"none\":\n        this.authNone(callback);\n        break;\n\n      case \"anonymous\":\n        this.authAnonymous(callback);\n        break;\n\n      // TODO: support other auth type\n      default:\n        NAF.log.log(\"FirebaseWebRtcInterface.auth: Unknown authType \" + type);\n        break;\n    }\n  }\n\n  authNone(callback) {\n    var self = this;\n\n    // asynchronously invokes open listeners for the compatibility with other auth types.\n    // TODO: generate not just random but also unique id\n    requestAnimationFrame(function() {\n      callback(self.randomString());\n    });\n  }\n\n  authAnonymous(callback) {\n    var self = this;\n    var firebaseApp = this.firebaseApp;\n\n    firebaseApp\n      .auth()\n      .signInAnonymously()\n      .catch(function(error) {\n        NAF.log.error(\"FirebaseWebRtcInterface.authAnonymous: \" + error);\n        self.connectFailure(null, error);\n      });\n\n    firebaseApp.auth().onAuthStateChanged(function(user) {\n      if (user !== null) {\n        callback(user.uid);\n      }\n    });\n  }\n\n  /*\n   * realtime database layout\n   *\n   * /rootPath/appId/roomId/\n   *   - /userId/\n   *     - timestamp: joining the room timestamp\n   *     - signal: used to send signal\n   *     - data: used to send guaranteed data\n   *   - /timestamp/: working path to get timestamp\n   *     - userId:\n   */\n\n  getRootPath() {\n    return this.rootPath;\n  }\n\n  getAppPath() {\n    return this.getRootPath() + \"/\" + this.appId;\n  }\n\n  getRoomPath() {\n    return this.getAppPath() + \"/\" + this.roomId;\n  }\n\n  getUserPath(id) {\n    return this.getRoomPath() + \"/\" + id;\n  }\n\n  getSignalPath(id) {\n    return this.getUserPath(id) + \"/signal\";\n  }\n\n  getDataPath(id) {\n    return this.getUserPath(id) + \"/data\";\n  }\n\n  getTimestampGenerationPath(id) {\n    return this.getRoomPath() + \"/timestamp/\" + id;\n  }\n\n  randomString() {\n    var stringLength = 16;\n    var chars = \"ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz0123456789\";\n    var string = \"\";\n\n    for (var i = 0; i < stringLength; i++) {\n      var randomNumber = Math.floor(Math.random() * chars.length);\n      string += chars.substring(randomNumber, randomNumber + 1);\n    }\n\n    return string;\n  }\n\n  getTimestamp(callback) {\n    var firebaseApp = this.firebaseApp;\n    var ref = firebaseApp\n      .database()\n      .ref(this.getTimestampGenerationPath(this.localId));\n    ref.set(this.firebase.database.ServerValue.TIMESTAMP);\n    ref.once(\"value\", function(data) {\n      var timestamp = data.val();\n      ref.remove();\n      callback(timestamp);\n    });\n    ref.onDisconnect().remove();\n  }\n\n  updateTimeOffset() {\n    return this.firebaseApp\n      .database()\n      .ref(\"/.info/serverTimeOffset\")\n      .once(\"value\")\n      .then(data => {\n        var timeOffset = data.val();\n\n        this.serverTimeRequests++;\n\n        if (this.serverTimeRequests <= 10) {\n          this.timeOffsets.push(timeOffset);\n        } else {\n          this.timeOffsets[this.serverTimeRequests % 10] = timeOffset;\n        }\n\n        this.avgTimeOffset =\n          this.timeOffsets.reduce((acc, offset) => (acc += offset), 0) /\n          this.timeOffsets.length;\n\n        if (this.serverTimeRequests > 10) {\n          setTimeout(() => this.updateTimeOffset(), 5 * 60 * 1000); // Sync clock every 5 minutes.\n        } else {\n          this.updateTimeOffset();\n        }\n      });\n  }\n\n  getServerTime() {\n    return new Date() + this.avgTimeOffset;\n  }\n}\n\nNAF.adapters.register(\"firebase\", FirebaseWebRtcAdapter);\n\nmodule.exports = FirebaseWebRtcAdapter;\n","module.exports = {\n    encode: function (decoded) {\n        return encodeURIComponent(decoded).replace(/\\./g, '%2E');\n    },\n    decode: function (encoded) {\n        return decodeURIComponent(encoded.replace('%2E', '.'));\n    },\n    // Replaces the key with `fn(key)` on each key in an object tree.\n    // i.e. making all keys uppercase.\n    deepKeyReplace: function (obj, fn) {\n        var rebuiltTree = Object.assign({}, obj);\n\n        function traverse(o, x, func) {\n            if (typeof(o) === \"object\") {\n                for (var i in o) {\n                    if (o[i] !== null && (typeof(o[i])==\"object\" || Array.isArray(o[i]))) {\n                        //going on step down in the object tree!!\n                        traverse(o[i],x[i],func);\n                    }\n                    func.apply(this,[x, i, x[i]]);\n                }\n            } else if (Array.isArray(o)) {\n                for (var i = 0; i < o.length; i++) {\n                    // func.apply(this,[o, i,o[i]]);\n                    if (o[i] !== null && (typeof(o[i])==\"object\" || Array.isArray(o[i]))) {\n                        //going on step down in the object tree!!\n                        traverse(o[i], x[i], func);\n                    }\n                }\n            }\n        }\n\n        traverse(obj, rebuiltTree, function (parent, key, val) {\n            delete parent[key];\n            parent[fn(key)] = val;\n        });\n\n        return rebuiltTree;\n    },\n    deepDecode: function (encodedTree) {\n        var $this = this;\n\n        var rebuiltTree = this.deepKeyReplace(encodedTree, function (key) {\n            return $this.decode(key);\n        });\n\n        return rebuiltTree;\n    },\n    deepEncode: function (decodedTree) {\n        var $this = this;\n\n        var rebuiltTree = this.deepKeyReplace(decodedTree, function (key) {\n            return $this.encode(key);\n        });\n\n        return rebuiltTree;\n    }\n}\n","class WebRtcPeer {\n  constructor(localId, remoteId, sendSignalFunc) {\n    this.localId = localId;\n    this.remoteId = remoteId;\n    this.sendSignalFunc = sendSignalFunc;\n    this.open = false;\n    this.channelLabel = \"networked-aframe-channel\";\n\n    this.pc = this.createPeerConnection();\n    this.channel = null;\n  }\n\n  setDatachannelListeners(openListener, closedListener, messageListener) {\n    this.openListener = openListener;\n    this.closedListener = closedListener;\n    this.messageListener = messageListener;\n  }\n\n  offer() {\n    var self = this;\n    // reliable: false - UDP\n    this.setupChannel(\n      this.pc.createDataChannel(this.channelLabel, { reliable: false })\n    );\n    this.pc.createOffer(\n      function(sdp) {\n        self.handleSessionDescription(sdp);\n      },\n      function(error) {\n        console.error(\"WebRtcPeer.offer: \" + error);\n      }\n    );\n  }\n\n  handleSignal(signal) {\n    // ignores signal if it isn't for me\n    if (this.localId !== signal.to || this.remoteId !== signal.from) return;\n\n    switch (signal.type) {\n      case \"offer\":\n        this.handleOffer(signal);\n        break;\n\n      case \"answer\":\n        this.handleAnswer(signal);\n        break;\n\n      case \"candidate\":\n        this.handleCandidate(signal);\n        break;\n\n      default:\n        console.error(\n          \"WebRtcPeer.handleSignal: Unknown signal type \" + signal.type\n        );\n        break;\n    }\n  }\n\n  send(type, data) {\n    // TODO: throw error?\n    if (this.channel === null || this.channel.readyState !== \"open\") return;\n\n    this.channel.send(JSON.stringify({ type: type, data: data }));\n  }\n\n  getStatus() {\n    if (this.channel === null) return WebRtcPeer.NOT_CONNECTED;\n\n    switch (this.channel.readyState) {\n      case \"open\":\n        return WebRtcPeer.IS_CONNECTED;\n\n      case \"connecting\":\n        return WebRtcPeer.CONNECTING;\n\n      case \"closing\":\n      case \"closed\":\n      default:\n        return WebRtcPeer.NOT_CONNECTED;\n    }\n  }\n\n  /*\n     * Privates\n     */\n\n  createPeerConnection() {\n    var self = this;\n    var RTCPeerConnection =\n      window.RTCPeerConnection ||\n      window.webkitRTCPeerConnection ||\n      window.mozRTCPeerConnection ||\n      window.msRTCPeerConnection;\n\n    if (RTCPeerConnection === undefined) {\n      throw new Error(\n        \"WebRtcPeer.createPeerConnection: This browser does not seem to support WebRTC.\"\n      );\n    }\n\n    var pc = new RTCPeerConnection({ iceServers: WebRtcPeer.ICE_SERVERS });\n\n    pc.onicecandidate = function(event) {\n      if (event.candidate) {\n        self.sendSignalFunc({\n          from: self.localId,\n          to: self.remoteId,\n          type: \"candidate\",\n          sdpMLineIndex: event.candidate.sdpMLineIndex,\n          candidate: event.candidate.candidate\n        });\n      }\n    };\n\n    // Note: seems like channel.onclose hander is unreliable on some platforms,\n    //       so also tries to detect disconnection here.\n    pc.oniceconnectionstatechange = function() {\n      if (self.open && pc.iceConnectionState === \"disconnected\") {\n        self.open = false;\n        self.closedListener(self.remoteId);\n      }\n    };\n\n    return pc;\n  }\n\n  setupChannel(channel) {\n    var self = this;\n\n    this.channel = channel;\n\n    // received data from a remote peer\n    this.channel.onmessage = function(event) {\n      var data = JSON.parse(event.data);\n      self.messageListener(self.remoteId, data.type, data.data);\n    };\n\n    // connected with a remote peer\n    this.channel.onopen = function(event) {\n      self.open = true;\n      self.openListener(self.remoteId);\n    };\n\n    // disconnected with a remote peer\n    this.channel.onclose = function(event) {\n      if (!self.open) return;\n      self.open = false;\n      self.closedListener(self.remoteId);\n    };\n\n    // error occurred with a remote peer\n    this.channel.onerror = function(error) {\n      console.error(\"WebRtcPeer.channel.onerror: \" + error);\n    };\n  }\n\n  handleOffer(message) {\n    var self = this;\n\n    this.pc.ondatachannel = function(event) {\n      self.setupChannel(event.channel);\n    };\n\n    this.setRemoteDescription(message);\n\n    this.pc.createAnswer(\n      function(sdp) {\n        self.handleSessionDescription(sdp);\n      },\n      function(error) {\n        console.error(\"WebRtcPeer.handleOffer: \" + error);\n      }\n    );\n  }\n\n  handleAnswer(message) {\n    this.setRemoteDescription(message);\n  }\n\n  handleCandidate(message) {\n    var self = this;\n    var RTCIceCandidate =\n      window.RTCIceCandidate ||\n      window.webkitRTCIceCandidate ||\n      window.mozRTCIceCandidate;\n\n    this.pc.addIceCandidate(\n      new RTCIceCandidate(message),\n      function() {},\n      function(error) {\n        console.error(\"WebRtcPeer.handleCandidate: \" + error);\n      }\n    );\n  }\n\n  handleSessionDescription(sdp) {\n    var self = this;\n\n    this.pc.setLocalDescription(\n      sdp,\n      function() {},\n      function(error) {\n        console.error(\"WebRtcPeer.handleSessionDescription: \" + error);\n      }\n    );\n\n    this.sendSignalFunc({\n      from: this.localId,\n      to: this.remoteId,\n      type: sdp.type,\n      sdp: sdp.sdp\n    });\n  }\n\n  setRemoteDescription(message) {\n    var self = this;\n    var RTCSessionDescription =\n      window.RTCSessionDescription ||\n      window.webkitRTCSessionDescription ||\n      window.mozRTCSessionDescription ||\n      window.msRTCSessionDescription;\n\n    this.pc.setRemoteDescription(\n      new RTCSessionDescription(message),\n      function() {},\n      function(error) {\n        console.error(\"WebRtcPeer.setRemoteDescription: \" + error);\n      }\n    );\n  }\n}\n\nWebRtcPeer.IS_CONNECTED = \"IS_CONNECTED\";\nWebRtcPeer.CONNECTING = \"CONNECTING\";\nWebRtcPeer.NOT_CONNECTED = \"NOT_CONNECTED\";\n\nWebRtcPeer.ICE_SERVERS = [\n  { urls: \"stun:stun1.l.google.com:19302\" },\n  { urls: \"stun:stun2.l.google.com:19302\" },\n  { urls: \"stun:stun3.l.google.com:19302\" },\n  { urls: \"stun:stun4.l.google.com:19302\" }\n];\n\nmodule.exports = WebRtcPeer;\n"],"sourceRoot":""}