Add pie chart and rewrite the pool ranking component

frontend/src/app/interfaces/node-api.interface.ts

@@ -52,15 +52,29 @@ export interface LiquidPegs {
 
 export interface ITranslators { [language: string]: string; }
 
+export interface SinglePoolStats {
+  pooldId: number,
+  name: string,
+  link: string,
+  blockCount: number,
+  emptyBlocks: number,
+  rank: number,
+  share: string,
+  lastEstimatedHashrate: string,
+  emptyBlockRatio: string,
+}
+
 export interface PoolsStats {
-  poolsStats: {
-    pooldId: number,
-    name: string,
-    link: string,
-    blockCount: number,
-    emptyBlocks: number,
-    rank: number,
-  }[],
   blockCount: number,
   lastEstimatedHashrate: number,
+  pools: SinglePoolStats[],
 }
+
+export interface MiningStats {
+  lastEstimatedHashrate: string,
+  blockCount: number,
+  totalEmptyBlock: number,
+  totalEmptyBlockRatio: string,
+  pools: SinglePoolStats[],
+}
+