Implement functionality to get product stats.

api/src/main/java/com/coinbase/exchange/api/products/ProductService.java

@@ -1,17 +1,13 @@
 package com.coinbase.exchange.api.products;
 
 import com.coinbase.exchange.api.exchange.CoinbaseExchange;
-import com.coinbase.exchange.model.Candles;
-import com.coinbase.exchange.model.Granularity;
-import com.coinbase.exchange.model.Product;
+import com.coinbase.exchange.model.*;
 import org.springframework.core.ParameterizedTypeReference;
 
 import java.time.Instant;
 import java.time.format.DateTimeFormatter;
 import java.time.format.DateTimeFormatterBuilder;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 
 import static java.util.stream.Collectors.joining;
 
@@ -47,7 +43,8 @@ public Candles getCandles(String productId, Map<String, String> queryParams) {
                     .map(entry -> entry.getKey() + "=" + entry.getValue())
                     .collect(joining("&")));
         }
-        return new Candles(exchange.get(url.toString(), new ParameterizedTypeReference<List<String[]>>() {}));
+        return new Candles(exchange.get(url.toString(), new ParameterizedTypeReference<List<String[]>>() {
+        }));
     }
 
     /**
@@ -79,9 +76,26 @@ public Candles getCandles(String productId, Granularity granularity) {
     }
 
     /**
-     *  If either one of the start or end fields are not provided then both fields will be ignored.
+     * If either one of the start or end fields are not provided then both fields will be ignored.
      */
     public Candles getCandles(String productId, Instant start, Instant end) {
         return getCandles(productId, start, end, null);
     }
-}
+
+    public ProductStats getProductStats(String productId) {
+        return exchange.get(PRODUCTS_ENDPOINT + "/" + productId + "/stats", new ParameterizedTypeReference<ProductStats>() {
+        });
+    }
+
+    public List<Stats> getStats() {
+        Map<String, Stats> statsMap = exchange.get(PRODUCTS_ENDPOINT + "/stats", new ParameterizedTypeReference<Map<String, Stats>>() {
+        });
+
+        List<String> products = new ArrayList<>(statsMap.keySet());
+        for (String product : products) {
+            statsMap.get(product).setProductId(product);
+        }
+
+        return new LinkedList<>(statsMap.values());
+    }
+}

api/src/test/java/com/coinbase/exchange/api/products/ProductsIntegrationTest.java

@@ -2,9 +2,8 @@
 
 import com.coinbase.exchange.api.BaseIntegrationTest;
 import com.coinbase.exchange.api.config.IntegrationTestConfiguration;
-import com.coinbase.exchange.model.Candles;
-import com.coinbase.exchange.model.Granularity;
-import com.coinbase.exchange.model.Product;
+import com.coinbase.exchange.model.*;
+import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
@@ -117,6 +116,18 @@ void shouldGetCandlesForWithAStartAndEndTime() {
         assertTrue(candles.getCandleList().size() > 100);
     }
 
+    @Test
+    void canGetStats() {
+        ProductStats productStats = productService.getProductStats(TEST_PRODUCT_ID);
+        Assertions.assertNotNull(productStats);
+    }
+
+    @Test
+    void canGetAllStats() {
+        List<Stats> stats = productService.getStats();
+        Assertions.assertNotNull(stats);
+    }
+
     private Duration getDuration(Candles candles) {
         Instant candleTime1 = candles.getCandleList().get(0).getTime();
         Instant candleTime2 = candles.getCandleList().get(1).getTime();

model/src/main/java/com/coinbase/exchange/model/ProductStats.java

@@ -0,0 +1,60 @@
+package com.coinbase.exchange.model;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import java.math.BigDecimal;
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class ProductStats {
+    @JsonProperty("open")
+    private BigDecimal open;
+    @JsonProperty("high")
+    private BigDecimal high;
+    @JsonProperty("low")
+    private BigDecimal low;
+    @JsonProperty("volume")
+    private BigDecimal volume;
+    @JsonProperty("last")
+    private BigDecimal last;
+
+    public BigDecimal getOpen() {
+        return open;
+    }
+
+    public void setOpen(BigDecimal open) {
+        this.open = open;
+    }
+
+    public BigDecimal getHigh() {
+        return high;
+    }
+
+    public void setHigh(BigDecimal high) {
+        this.high = high;
+    }
+
+    public BigDecimal getLow() {
+        return low;
+    }
+
+    public void setLow(BigDecimal low) {
+        this.low = low;
+    }
+
+    public BigDecimal getVolume() {
+        return volume;
+    }
+
+    public void setVolume(BigDecimal volume) {
+        this.volume = volume;
+    }
+
+    public BigDecimal getLast() {
+        return last;
+    }
+
+    public void setLast(BigDecimal last) {
+        this.last = last;
+    }
+}

model/src/main/java/com/coinbase/exchange/model/Stats.java

@@ -0,0 +1,88 @@
+package com.coinbase.exchange.model;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import java.math.BigDecimal;
+import java.util.Map;
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class Stats {
+    private String productId;
+    private BigDecimal volume30Day;
+    private BigDecimal open24Hour;
+    private BigDecimal high24Hour;
+    private BigDecimal low24Hour;
+    private BigDecimal volume24Hour;
+    private BigDecimal last24Hour;
+
+    @JsonProperty("stats_30day")
+    private void stats30Day(Map<String, BigDecimal> volume30Day) {
+        this.volume30Day = volume30Day.get("volume");
+    }
+
+    @JsonProperty("stats_24hour")
+    private void stats24Hour(Map<String, BigDecimal> stats24Hour) {
+        this.open24Hour = stats24Hour.get("open");
+        this.high24Hour = stats24Hour.get("high");
+        this.low24Hour = stats24Hour.get("low");
+        this.volume24Hour = stats24Hour.get("volume");
+        this.last24Hour = stats24Hour.get("last");
+    }
+
+    public String getProductId() {
+        return productId;
+    }
+
+    public void setProductId(String productId) {
+        this.productId = productId;
+    }
+
+    public BigDecimal getVolume30Day() {
+        return volume30Day;
+    }
+
+    public void setVolume30Day(BigDecimal volume30Day) {
+        this.volume30Day = volume30Day;
+    }
+
+    public BigDecimal getOpen24Hour() {
+        return open24Hour;
+    }
+
+    public void setOpen24Hour(BigDecimal open24Hour) {
+        this.open24Hour = open24Hour;
+    }
+
+    public BigDecimal getHigh24Hour() {
+        return high24Hour;
+    }
+
+    public void setHigh24Hour(BigDecimal high24Hour) {
+        this.high24Hour = high24Hour;
+    }
+
+    public BigDecimal getLow24Hour() {
+        return low24Hour;
+    }
+
+    public void setLow24Hour(BigDecimal low24Hour) {
+        this.low24Hour = low24Hour;
+    }
+
+    public BigDecimal getVolume24Hour() {
+        return volume24Hour;
+    }
+
+    public void setVolume24Hour(BigDecimal volume24Hour) {
+        this.volume24Hour = volume24Hour;
+    }
+
+    public BigDecimal getLast24Hour() {
+        return last24Hour;
+    }
+
+    public void setLast24Hour(BigDecimal last24Hour) {
+        this.last24Hour = last24Hour;
+    }
+}