format

libs/utils/src/generic-functions.ts

@@ -3,7 +3,7 @@
  * These functions demonstrate how to use generic types with OHLCV data
  */
 
-import type { OHLCV, HasClose, HasOHLC, HasVolume } from '@stock-bot/types';
+import type { HasClose, HasOHLC, HasVolume, OHLCV } from '@stock-bot/types';
 
 /**
  * Extract close prices from any data structure that has a close field
@@ -16,7 +16,9 @@ export function extractCloses<T extends HasClose>(data: T[]): number[] {
 /**
  * Extract OHLC prices from any data structure that has OHLC fields
  */
-export function extractOHLC<T extends HasOHLC>(data: T[]): {
+export function extractOHLC<T extends HasOHLC>(
+  data: T[]
+): {
   opens: number[];
   highs: number[];
   lows: number[];
@@ -43,12 +45,12 @@ export function extractVolumes<T extends HasVolume>(data: T[]): number[] {
 export function calculateSMA<T extends HasClose>(data: T[], period: number): number[] {
   const closes = extractCloses(data);
   const result: number[] = [];
-  
+
   for (let i = period - 1; i < closes.length; i++) {
     const sum = closes.slice(i - period + 1, i + 1).reduce((a, b) => a + b, 0);
     result.push(sum / period);
   }
-  
+
   return result;
 }
 
@@ -64,7 +66,7 @@ export function calculateTypicalPrice<T extends HasOHLC>(data: T[]): number[] {
  */
 export function calculateTrueRange<T extends HasOHLC>(data: T[]): number[] {
   const result: number[] = [];
-  
+
   for (let i = 0; i < data.length; i++) {
     if (i === 0) {
       result.push(data[i]!.high - data[i]!.low);
@@ -79,7 +81,7 @@ export function calculateTrueRange<T extends HasOHLC>(data: T[]): number[] {
       result.push(tr);
     }
   }
-  
+
   return result;
 }
 
@@ -89,7 +91,7 @@ export function calculateTrueRange<T extends HasOHLC>(data: T[]): number[] {
 export function calculateReturns<T extends HasClose>(data: T[]): number[] {
   const closes = extractCloses(data);
   const returns: number[] = [];
-  
+
   for (let i = 1; i < closes.length; i++) {
     const current = closes[i]!;
     const previous = closes[i - 1]!;
@@ -99,7 +101,7 @@ export function calculateReturns<T extends HasClose>(data: T[]): number[] {
       returns.push(0);
     }
   }
-  
+
   return returns;
 }
 
@@ -109,7 +111,7 @@ export function calculateReturns<T extends HasClose>(data: T[]): number[] {
 export function calculateLogReturns<T extends HasClose>(data: T[]): number[] {
   const closes = extractCloses(data);
   const logReturns: number[] = [];
-  
+
   for (let i = 1; i < closes.length; i++) {
     const current = closes[i]!;
     const previous = closes[i - 1]!;
@@ -119,7 +121,7 @@ export function calculateLogReturns<T extends HasClose>(data: T[]): number[] {
       logReturns.push(0);
     }
   }
-  
+
   return logReturns;
 }
 
@@ -130,19 +132,19 @@ export function calculateVWAP<T extends HasOHLC & HasVolume>(data: T[]): number[
   const result: number[] = [];
   let cumulativeVolumePrice = 0;
   let cumulativeVolume = 0;
-  
+
   for (const item of data) {
     const typicalPrice = (item.high + item.low + item.close) / 3;
     cumulativeVolumePrice += typicalPrice * item.volume;
     cumulativeVolume += item.volume;
-    
+
     if (cumulativeVolume > 0) {
       result.push(cumulativeVolumePrice / cumulativeVolume);
     } else {
       result.push(typicalPrice);
     }
   }
-  
+
   return result;
 }
 
@@ -156,11 +158,7 @@ export function filterBySymbol(data: OHLCV[], symbol: string): OHLCV[] {
 /**
  * Filter OHLCV data by time range
  */
-export function filterByTimeRange(
-  data: OHLCV[], 
-  startTime: number, 
-  endTime: number
-): OHLCV[] {
+export function filterByTimeRange(data: OHLCV[], startTime: number, endTime: number): OHLCV[] {
   return data.filter(item => item.timestamp >= startTime && item.timestamp <= endTime);
 }
 
@@ -169,14 +167,14 @@ export function filterByTimeRange(
  */
 export function groupBySymbol(data: OHLCV[]): Record<string, OHLCV[]> {
   const grouped: Record<string, OHLCV[]> = {};
-  
+
   for (const item of data) {
     if (!grouped[item.symbol]) {
       grouped[item.symbol] = [];
     }
     grouped[item.symbol]!.push(item);
   }
-  
+
   return grouped;
 }
 
@@ -186,6 +184,6 @@ export function groupBySymbol(data: OHLCV[]): Record<string, OHLCV[]> {
 export function convertTimestamps(data: OHLCV[]): Array<OHLCV & { date: Date }> {
   return data.map(item => ({
     ...item,
-    date: new Date(item.timestamp)
+    date: new Date(item.timestamp),
   }));
-}
+}