114 lines
2.4 KiB
Go
114 lines
2.4 KiB
Go
package lastfm
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"net/url"
|
|
"strconv"
|
|
)
|
|
|
|
const (
|
|
apiBaseUrl = "https://ws.audioscrobbler.com/2.0/"
|
|
)
|
|
|
|
type Error struct {
|
|
Code int
|
|
Message string
|
|
}
|
|
|
|
func (e *Error) Error() string {
|
|
return fmt.Sprintf("last.fm error(%d): %s", e.Code, e.Message)
|
|
}
|
|
|
|
type httpDoer interface {
|
|
Do(req *http.Request) (*http.Response, error)
|
|
}
|
|
|
|
func NewClient(apiKey string, lang string, hc httpDoer) *Client {
|
|
return &Client{apiKey, lang, hc}
|
|
}
|
|
|
|
type Client struct {
|
|
apiKey string
|
|
lang string
|
|
hc httpDoer
|
|
}
|
|
|
|
func (c *Client) makeRequest(params url.Values) (*Response, error) {
|
|
params.Add("format", "json")
|
|
params.Add("api_key", c.apiKey)
|
|
|
|
req, _ := http.NewRequest("GET", apiBaseUrl, nil)
|
|
req.URL.RawQuery = params.Encode()
|
|
|
|
resp, err := c.hc.Do(req)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
defer resp.Body.Close()
|
|
data, err := ioutil.ReadAll(resp.Body)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var response Response
|
|
jsonErr := json.Unmarshal(data, &response)
|
|
|
|
if resp.StatusCode != 200 && jsonErr != nil {
|
|
return nil, fmt.Errorf("last.fm http status: (%d)", resp.StatusCode)
|
|
}
|
|
|
|
if jsonErr != nil {
|
|
return nil, jsonErr
|
|
}
|
|
|
|
if response.Error != 0 {
|
|
return &response, &Error{Code: response.Error, Message: response.Message}
|
|
}
|
|
|
|
return &response, nil
|
|
}
|
|
|
|
func (c *Client) ArtistGetInfo(ctx context.Context, name string, mbid string) (*Artist, error) {
|
|
params := url.Values{}
|
|
params.Add("method", "artist.getInfo")
|
|
params.Add("artist", name)
|
|
params.Add("mbid", mbid)
|
|
params.Add("lang", c.lang)
|
|
response, err := c.makeRequest(params)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &response.Artist, nil
|
|
}
|
|
|
|
func (c *Client) ArtistGetSimilar(ctx context.Context, name string, mbid string, limit int) (*SimilarArtists, error) {
|
|
params := url.Values{}
|
|
params.Add("method", "artist.getSimilar")
|
|
params.Add("artist", name)
|
|
params.Add("mbid", mbid)
|
|
params.Add("limit", strconv.Itoa(limit))
|
|
response, err := c.makeRequest(params)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &response.SimilarArtists, nil
|
|
}
|
|
|
|
func (c *Client) ArtistGetTopTracks(ctx context.Context, name string, mbid string, limit int) (*TopTracks, error) {
|
|
params := url.Values{}
|
|
params.Add("method", "artist.getTopTracks")
|
|
params.Add("artist", name)
|
|
params.Add("mbid", mbid)
|
|
params.Add("limit", strconv.Itoa(limit))
|
|
response, err := c.makeRequest(params)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &response.TopTracks, nil
|
|
}
|