0001-Create-Patch-File-task1.patch

From c3d66677ade7165c6742fd598cfa620b7535dbe4 Mon Sep 17 00:00:00 2001
From: kartik <arorakartik923@gmail.com>
Date: Thu, 7 May 2020 10:19:53 +0530
Subject: [PATCH] Create Patch File

---
 src/DataManipulator.ts | 34 +++++++++++++++++++++++-----------
 src/Graph.tsx          | 27 ++++++++++++++++-----------
 2 files changed, 39 insertions(+), 22 deletions(-)

diff --git a/src/DataManipulator.ts b/src/DataManipulator.ts
index f6b15ff..f7b50e2 100644
--- a/src/DataManipulator.ts
+++ b/src/DataManipulator.ts
@@ -1,20 +1,32 @@
 import { ServerRespond } from './DataStreamer';
 
-export interface Row {
-  stock: string,
-  top_ask_price: number,
+export interface Row {             // matching the schema objects
+  
+  ratio: number,
   timestamp: Date,
+  upper_bound: number,
+  lower_bound: number,
+  trigger_alert: number | undefined,   
 }
 
 
 export class DataManipulator {
-  static generateRow(serverResponds: ServerRespond[]): Row[] {
-    return serverResponds.map((el: any) => {
-      return {
-        stock: el.stock,
-        top_ask_price: el.top_ask && el.top_ask.price || 0,
-        timestamp: el.timestamp,
-      };
-    })
+  static generateRow(serverRespond: ServerRespond[]): Row {
+	  const priceABC= (serverRespond[0].top_ask.price + serverRespond[0].top_bid.price)/2;      // price of stock ABC( avg of top_ask and top_bid)
+	  const priceDEF= (serverRespond[1].top_ask.price + serverRespond[1].top_bid.price)/2;      // price of stock DEF ( avg of top_ask and top_bid)
+	  const ratio = priceABC / priceDEF;                                                
+	  const upperBound= 1 + 0.025;
+	  const lowerBound = 1 - 0.025;              
+	   
+	   return {
+		  
+		   ratio,
+		   timestamp: serverRespond[0].timestamp > serverRespond[1].timestamp ? serverRespond[0].timestamp : serverRespond[1].timestamp,
+		   upper_bound: upperBound,
+		   lower_bound: lowerBound,
+		   trigger_alert: (ratio > upperBound || ratio < lowerBound) ? ratio : undefined,    // genrate trigger if ratio crosses the bounds.
+		   
+	   };
+   
   }
 }
diff --git a/src/Graph.tsx b/src/Graph.tsx
index 58fb997..3a0b885 100644
--- a/src/Graph.tsx
+++ b/src/Graph.tsx
@@ -22,11 +22,13 @@ class Graph extends Component<IProps, {}> {
     // Get element from the DOM.
     const elem = document.getElementsByTagName('perspective-viewer')[0] as unknown as PerspectiveViewerElement;
 
-    const schema = {
-      stock: 'string',
-      top_ask_price: 'float',
-      top_bid_price: 'float',
-      timestamp: 'date',
+    const schema = {                              // export interface in dataManipulator.ts should match with these schema objects
+  
+	  ratio: 'float',
+	  lower_bound: 'float',
+	  upper_bound: 'float',
+	  timestamp: 'date',
+	  trigger_alert: 'float',           
     };
 
     if (window.perspective && window.perspective.worker()) {
@@ -40,19 +42,22 @@ class Graph extends Component<IProps, {}> {
       elem.setAttribute('row-pivots', '["timestamp"]');
       elem.setAttribute('columns', '["top_ask_price"]');
       elem.setAttribute('aggregates', JSON.stringify({
-        stock: 'distinctcount',
-        top_ask_price: 'avg',
-        top_bid_price: 'avg',
-        timestamp: 'distinct count',
+        
+		ratio: 'avg',
+		lower_bound: 'avg',
+		upper_bound: 'avg',
+		timestamp: 'distinct count',
+		trigger_alert: 'avg',
+		
       }));
     }
   }
 
   componentDidUpdate() {
     if (this.table) {
-      this.table.update(
+      this.table.update([
         DataManipulator.generateRow(this.props.data),
-      );
+      ]);
     }
   }
 }
-- 
2.24.1.windows.2