Added hashrate chart

backend/src/repositories/HashratesRepository.ts

@@ -1,3 +1,4 @@
+import { Common } from '../api/common';
 import { DB } from '../database';
 import logger from '../logger';
 
@@ -30,12 +31,22 @@ class HashratesRepository {
   /**
    * Returns an array of all timestamp we've already indexed
    */
-  public async $getAllTimestamp(): Promise<number[]> {
+  public async $get(interval: string | null): Promise<any[]> {
+    interval = Common.getSqlInterval(interval);
+
     const connection = await DB.pool.getConnection();
-    const [rows]: any[] = await connection.query(`SELECT UNIX_TIMESTAMP(hashrate_timestamp) as timestamp from hashrates`);
+
+    let query = `SELECT UNIX_TIMESTAMP(hashrate_timestamp) as timestamp, avg_hashrate as avgHashrate
+      FROM hashrates`;
+
+    if (interval) {
+      query += ` WHERE hashrate_timestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+    }
+
+    const [rows]: any[] = await connection.query(query);
     connection.release();
-    
-    return rows.map(val => val.timestamp);
+
+    return rows;
   }
 }