1package coingecko
 2
 3import (
 4	"encoding/json"
 5	"net/http"
 6	"net/url"
 7	"time"
 8)
 9
10var (
11	CoinGeckoClient = &http.Client{
12		Timeout: 10 * time.Second,
13	}
14	apiEndpoint = "https://api.coingecko.com/api/v3/coins"
15)
16
17type CoinId struct {
18	Id     string `json:"id"`
19	Symbol string `json:"symbol"`
20}
21
22type CoinData struct {
23	Name       string `json:"name"`
24	Symbol     string `json:"symbol"`
25	MarketData struct {
26		Current struct {
27			Usd float64 `json:"usd"`
28		} `json:"current_price"`
29		High struct {
30			Usd float64 `json:"usd"`
31		} `json:"high_24h"`
32		Low struct {
33			Usd float64 `json:"usd"`
34		} `json:"low_24h"`
35		MarketCap struct {
36			Usd float64 `json:"usd"`
37		} `json:"market_cap"`
38		MarketCapRank int64   `json:"market_cap_rank"`
39		Change24h     float64 `json:"price_change_percentage_24h"`
40		Change7d      float64 `json:"price_change_percentage_7d"`
41		Change14d     float64 `json:"price_change_percentage_14d"`
42		Change30d     float64 `json:"price_change_percentage_30d"`
43		Change60d     float64 `json:"price_change_percentage_60d"`
44		Change200d    float64 `json:"price_change_percentage_200d"`
45		Change1y      float64 `json:"price_change_percentage_1y"`
46	} `json:"market_data"`
47}
48
49func GetCoinList() ([]CoinId, error) {
50	req, err := http.NewRequest("GET", apiEndpoint+"/list", nil)
51	if err != nil {
52		return nil, err
53	}
54	req.Header.Add("User-Agent", "github.com/icyphox/paprika")
55
56	res, err := CoinGeckoClient.Do(req)
57	if err != nil {
58		return nil, err
59	}
60	defer res.Body.Close()
61
62	var resData []CoinId
63	err = json.NewDecoder(res.Body).Decode(&resData)
64	if err != nil {
65		return nil, err
66	}
67
68	return resData, nil
69}
70
71func GetCoinPrice(coinId string) (*CoinData, error) {
72	cid := url.PathEscape(coinId)
73	req, err := http.NewRequest("GET", apiEndpoint+"/"+cid, nil)
74	if err != nil {
75		return nil, err
76	}
77	req.Header.Add("User-Agent", "github.com/icyphox/paprika")
78
79	res, err := CoinGeckoClient.Do(req)
80	if err != nil {
81		return nil, err
82	}
83	defer res.Body.Close()
84
85	if res.StatusCode == 404 {
86		return nil, nil
87	}
88
89	var resData *CoinData
90	err = json.NewDecoder(res.Body).Decode(&resData)
91	if err != nil {
92		return nil, err
93	}
94
95	return resData, nil
96}