feat: 简化交易计算

leopard-core/pom.xml

@@ -33,6 +33,12 @@
       <artifactId>hutool-http</artifactId>
     </dependency>
 
+    <dependency>
+      <groupId>org.icepear.echarts</groupId>
+      <artifactId>echarts-java</artifactId>
+      <version>1.1.0</version>
+    </dependency>
+
     <dependency>
       <groupId>io.github.ralfkonrad.quantlib_for_maven</groupId>
       <artifactId>quantlib</artifactId>

leopard-core/src/main/java/com/lanyuanxiaoyao/leopard/core/strategy/TradeEngine.java

@@ -8,6 +8,7 @@ import com.lanyuanxiaoyao.leopard.core.repository.DailyRepository;
 import java.time.LocalDate;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.function.Predicate;
 import lombok.Data;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
@@ -50,9 +51,6 @@ public class TradeEngine {
           .filter(daily -> daily.getTradeDate().isBefore(currentDate))
           .toList()
       );
-      if (trade == 0) {
-        continue;
-      }
       var daily = dailies.stream()
         .filter(d -> ObjectUtil.equals(d.getTradeDate(), currentDate))
         .findFirst()
@@ -75,20 +73,46 @@ public class TradeEngine {
     }
 
     public int getVolume() {
+      return getVolume(trade -> true);
+    }
+
+    public int getVolume(LocalDate date) {
+      return getVolume(trade -> trade.date().isBefore(date) || trade.date().isEqual(date));
+    }
+
+    private int getVolume(Predicate<Trade> predicate) {
       return trades.stream()
+        .filter(predicate)
         .mapToInt(Trade::volume)
         .sum();
     }
 
     public double getCash() {
+      return getCash(trade -> true);
+    }
+
+    public double getCash(LocalDate date) {
+      return getCash(trade -> trade.date().isBefore(date) || trade.date().isEqual(date));
+    }
+
+    private double getCash(Predicate<Trade> predicate) {
       return trades.stream()
+        .filter(predicate)
         .mapToDouble(trade -> -1 * trade.volume() * trade.price())
         .sum();
     }
 
     public double getPrice() {
-      int volume = getVolume();
-      return volume == 0 ? 0 : getCash() / volume;
+      return getPrice(trade -> true);
+    }
+
+    public double getPrice(LocalDate date) {
+      return getPrice(trade -> trade.date().isBefore(date) || trade.date().isEqual(date));
+    }
+
+    public double getPrice(Predicate<Trade> predicate) {
+      int volume = getVolume(predicate);
+      return volume == 0 ? 0 : getCash(predicate) / volume;
     }
 
     public record Trade(