add altcoin markets graph data

coinmarketcap.go

@@ -13,9 +13,10 @@ import (
 )
 
 var (
-	baseURL        = "https://api.coinmarketcap.com/v1"
-	graphURL       = "https://graphs2.coinmarketcap.com/currencies"
-	marketGraphURL = "https://graphs2.coinmarketcap.com/global/marketcap-total"
+	baseURL               = "https://api.coinmarketcap.com/v1"
+	coinGraphURL          = "https://graphs2.coinmarketcap.com/currencies"
+	globalMarketGraphURL  = "https://graphs2.coinmarketcap.com/global/marketcap-total"
+	altcoinMarketGraphURL = "https://graphs2.coinmarketcap.com/global/marketcap-altcoin"
 )
 
 // GetMarketData get information about the global market data of the cryptocurrencies
@@ -35,7 +36,23 @@ func GetMarketData() (GlobalMarketData, error) {
 
 // GetMarketGraphData get graph data points of global market
 func GetMarketGraphData(start int64, end int64) (MarketGraph, error) {
-	url := fmt.Sprintf("%s/%d/%d", marketGraphURL, start*1000, end*1000)
+	url := fmt.Sprintf("%s/%d/%d", globalMarketGraphURL, start*1000, end*1000)
+	resp, err := makeReq(url)
+	if err != nil {
+		return MarketGraph{}, err
+	}
+	var data MarketGraph
+	err = json.Unmarshal(resp, &data)
+	if err != nil {
+		return MarketGraph{}, err
+	}
+
+	return data, nil
+}
+
+// GetAltcoinMarketGraphData get graph data points of altcoin market
+func GetAltcoinMarketGraphData(start int64, end int64) (MarketGraph, error) {
+	url := fmt.Sprintf("%s/%d/%d", altcoinMarketGraphURL, start*1000, end*1000)
 	resp, err := makeReq(url)
 	if err != nil {
 		return MarketGraph{}, err
@@ -92,7 +109,7 @@ func GetAllCoinData(limit int) (map[string]Coin, error) {
 
 // GetCoinGraphData get graph data points for a crypto currency
 func GetCoinGraphData(coin string, start int64, end int64) (CoinGraph, error) {
-	url := fmt.Sprintf("%s/%s/%d/%d", graphURL, coin, start*1000, end*1000)
+	url := fmt.Sprintf("%s/%s/%d/%d", coinGraphURL, coin, start*1000, end*1000)
 	resp, err := makeReq(url)
 	if err != nil {
 		return CoinGraph{}, err

coinmarketcap_test.go

@@ -50,6 +50,25 @@ func TestGetMarketGraphData(t *testing.T) {
 	}
 }
 
+func TestGetAltcoinMarketGraphData(t *testing.T) {
+	var threeMonths int64 = (60 * 60 * 24 * 90)
+	end := time.Now().Unix()
+	start := end - threeMonths
+
+	graph, err := GetAltcoinMarketGraphData(start, end)
+	if err != nil {
+		t.FailNow()
+	}
+
+	if graph.MarketCapByAvailableSupply[0][0] == 0 {
+		t.FailNow()
+	}
+
+	if graph.VolumeUSD[0][0] == 0 {
+		t.FailNow()
+	}
+}
+
 func TestGetCoinData(t *testing.T) {
 	coin, err := GetCoinData("ethereum")
 	if err != nil {