Updating to match the backup node feature of SN

index.html

@@ -5218,6 +5218,50 @@
           }
         });
       },
+      getPrevSupernode: function(flo_addr, n = 1, KB = this.supernodeKBucket){
+        return new Promise((resolve, reject) => {
+          try {
+            let isFloIdUint8 = flo_addr instanceof Uint8Array;
+            if (!isFloIdUint8)
+              flo_addr = this.floIdToKbucketId(flo_addr);
+            const KA = KB.toArray();
+            let pos = KB._indexOf(KB.root,flo_addr)
+            var prevSupernode = []
+            for(var i = 1; i <= n; i++){
+                if(pos - i < 0)
+                    var prev = pos - i + KA.length
+                else
+                    var prev = pos - i
+                prevSupernode.push(KA[prev])
+            }
+            resolve(prevSupernode);
+          } catch (error) {
+            reject(error);
+          }
+        });
+      },
+      getNextSupernode: function(flo_addr, n = 1, KB = this.supernodeKBucket){
+        return new Promise((resolve, reject) => {
+          try {
+            let isFloIdUint8 = flo_addr instanceof Uint8Array;
+            if (!isFloIdUint8)
+              flo_addr = this.floIdToKbucketId(flo_addr);
+            const KA = KB.toArray();
+            let pos = KB._indexOf(KB.root,flo_addr)
+            var nextSupernode = []
+            for(var i = 1; i <= n; i++){
+                if(pos + i >= KA.length)
+                    var next = pos + i - KA.length
+                else
+                    var next = pos + i
+                nextSupernode.push(KA[next])
+            }
+            resolve(nextSupernode);
+          } catch (error) {
+            reject(error);
+          }
+        });
+      },
       determineClosestSupernode: function (flo_addr, n = 1, KB = this.supernodeKBucket) {
         return new Promise((resolve, reject) => {
           try {
@@ -5233,42 +5277,78 @@
       }
     },
 
+    sendDataToSN(data, snfloID){
+        return new Promise((resolve, reject) => {
+            console.log(snfloID)
+            var websocket = new WebSocket("wss://" + floGlobals.supernodes[snfloID].uri + "/ws");
+            websocket.onmessage = (evt => {
+                if(evt.data == '$+'){
+                    websocket.send(data);
+                    resolve(`Data sent to supernode : ${snfloID}`);
+                }else if(evt.data == '$-'){
+                    this.kBucket.getNextSupernode(snfloID)
+                        .then(nextnode => this.sendDataToSN(data, nextnode[0].floID))
+                        .catch(error => reject(error))
+                }else{
+                    console.log(evt.data)
+                    reject(evt.data)
+                }
+                websocket.close();
+            })
+            websocket.onerror = (evt) => {
+                this.kBucket.getNextSupernode(snfloID)
+                    .then(nextnode => this.sendDataToSN(data, nextnode[0].floID))
+                    .catch(error => reject(error))
+            };
+        })
+    },
+
     //Sends data to the supernode
     sendData: function (data, floID) {
       return new Promise((resolve, reject) => {
         this.kBucket.determineClosestSupernode(floID).then(result => {
-          var websocket = new WebSocket("wss://" + floGlobals.supernodes[result[0].floID].uri + "/ws");
-          websocket.onopen = (evt) => {
-            websocket.send(data);
-            resolve(`Data sent to ${floID}'s supernode`);
-            websocket.close();
-          };
-          websocket.onerror = (evt) => {
-            reject(evt);
-          };
+            this.sendDataToSN(data, result[0].floID)
+                .then(result => resolve(result))
+                .catch(error => reject(error))
         }).catch(error => {
-          reject(error);
+            reject(error);
         });
       });
     },
 
+    requestDataFromSN(request, snfloID){
+        return new Promise((resolve, reject) => {
+            var websocket = new WebSocket("wss://" + floGlobals.supernodes[snfloID].uri + "/ws");
+            websocket.onmessage = (evt => {
+                if(evt.data == '$+'){
+                    websocket.send(`?${request}`);
+                }else if(evt.data == '$-'){
+                    this.kBucket.getNextSupernode(snfloID)
+                        .then(nextnode => this.requestDataFromSN(request, nextnode[0].floID))
+                        .catch(error => reject(error))
+                    websocket.close()
+                }else{
+                    resolve(evt.data);
+                    websocket.close();
+                }
+            })
+            websocket.onerror = (evt) => {
+                this.kBucket.getNextSupernode(snfloID)
+                    .then(nextnode => this.requestDataFromSN(request, nextnode[0].floID))
+                    .catch(error => reject(error))
+            };
+        })
+    },
+
     //Request data from supernode
     requestData: function (request, floID) {
       return new Promise((resolve, reject) => {
         this.kBucket.determineClosestSupernode(floID).then(result => {
-          var websocket = new WebSocket("wss://" + floGlobals.supernodes[result[0].floID].uri + "/ws");
-          websocket.onopen = (evt) => {
-            websocket.send(`?${request}`);
-          };
-          websocket.onmessage = (evt) => {
-            resolve(evt.data);
-            websocket.close();
-          };
-          websocket.onerror = (evt) => {
-            reject(evt);
-          };
+            this.requestDataFromSN(request, result[0].floID)
+                .then(result => resolve(result))
+                .catch(error => reject(error))
         }).catch(error => {
-          reject(error);
+            reject(error);
         });
       });
     }