From 21ba0458e1b318eca7e7c5092f84d59cb23a6b5b Mon Sep 17 00:00:00 2001
From: Nils Jakobi <jakobi.nils@gmail.com>
Date: Sat, 21 Nov 2020 18:36:33 +0100
Subject: [PATCH] added GetCoinValue function to coinGeckoAPI

---
 cake.go         |  4 +++-
 coinGeckoAPI.go | 31 ++++++++++++++++++++++++++-----
 go.mod          |  9 +--------
 3 files changed, 30 insertions(+), 14 deletions(-)

diff --git a/cake.go b/cake.go
index ecca2dd..1edc3a6 100644
--- a/cake.go
+++ b/cake.go
@@ -218,7 +218,8 @@ func monthlyRewardOverview(lines []line) rewards {
 	referral := make(map[time.Month]float64)
 	airdrop := make(map[time.Month]float64)
 	swapped := make(map[time.Month]float64)
-
+	// coinValue, err := GetCoinValue("bitcoin", "eur")
+	// if err == nil {
 	// loop through all lines
 	for i := range lines {
 		// filter out operations
@@ -238,6 +239,7 @@ func monthlyRewardOverview(lines []line) rewards {
 		case "Swapped in":
 			swapped[lines[i].Date.Month()] += lines[i].Amount
 		}
+		// }
 	}
 
 	// get precision for specific coin
diff --git a/coinGeckoAPI.go b/coinGeckoAPI.go
index 7457c96..b084d7d 100644
--- a/coinGeckoAPI.go
+++ b/coinGeckoAPI.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"encoding/json"
+	"fmt"
 	"io/ioutil"
 	"net/http"
 )
@@ -17,10 +18,8 @@ func CheckStatusCoinGecko() bool {
 	url := "https://api.coingecko.com/api/v3/ping"
 	response, err := http.Get(url)
 	if err == nil {
-		// API is available, let's read the response
-		data, _ := ioutil.ReadAll(response.Body)
 		var status statusResponse
-		json.Unmarshal(data, &status)
+		readBody(response, &status)
 		if status.GeckoSays == "(V3) To the Moon!" {
 			// API is working as expected
 			return true
@@ -29,6 +28,28 @@ func CheckStatusCoinGecko() bool {
 	return false
 }
 
-func GetCoinInfo() {
-
+// GetCoinValue needs a comment
+func GetCoinValue(coinID string, fiat string) (float64, error) {
+	// check if API is up
+	if CheckStatusCoinGecko() == true {
+		// https://api.coingecko.com/api/v3/simple/price?ids=defichain&vs_currencies=eur
+		url := "https://api.coingecko.com/api/v3/simple/price?ids=" + coinID + "&vs_currencies=" + fiat
+		response, err := http.Get(url)
+		if err == nil {
+			// there's no error, we got a response
+			var r map[string]interface{}
+			readBody(response, &r)
+			// as the response will vary on coin and fiat we need to use interface{} here
+			value := r[coinID].(map[string]interface{})
+			return value[fiat].(float64), nil
+		}
+		return 0, fmt.Errorf("There was a problem with the response from Coingecko, Error is: %s", err.Error())
+	}
+	return 0, fmt.Errorf("The API of Coingecko seems to be down")
+}
+
+func readBody(h *http.Response, i interface{}) {
+	// API is available, let's read the response
+	data, _ := ioutil.ReadAll(h.Body)
+	json.Unmarshal(data, i)
 }
diff --git a/go.mod b/go.mod
index 83a9f8b..622436b 100644
--- a/go.mod
+++ b/go.mod
@@ -2,11 +2,4 @@ module git.nils.zone/nils/goCake
 
 go 1.15
 
-require (
-	git.nils.zone/nils/prettify v0.0.4
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/lucasb-eyer/go-colorful v1.0.3
-	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
-	github.com/stretchr/testify v1.6.1
-	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
-)
+require github.com/lucasb-eyer/go-colorful v1.0.3