refactor: use methods instead of functions

internal/deezer/album.go

@@ -0,0 +1,52 @@
+package deezer
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"regexp"
+)
+
+type Album struct {
+	Data struct {
+		ID          string `json:"ALB_ID"`
+		Name        string `json:"ALB_TITLE"`
+		ArtistID    string `json:"ART_ID"`
+		ArtistName  string `json:"ART_NAME"`
+		CoverID     string `json:"ALB_PICTURE"`
+		ReleaseData string `json:"PHYSICAL_RELEASE_DATE"`
+	} `json:"DATA"`
+	Songs struct {
+		Data []Song `json:"data"`
+	} `json:"SONGS"`
+}
+
+func GetAlbumData(id string) (*Album, error) {
+	url := fmt.Sprintf("https://www.deezer.com/en/album/%s", id)
+
+	resp, err := http.Get(url)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected status code: %d", resp.StatusCode)
+	}
+
+	body, _ := io.ReadAll(resp.Body)
+	re := regexp.MustCompile(`window\.__DZR_APP_STATE__ = (\{.*\})`)
+	matches := re.FindStringSubmatch(string(body))
+	if len(matches) != 2 {
+		return nil, fmt.Errorf("error parsing response")
+	}
+
+	var album Album
+	err = json.Unmarshal([]byte(matches[1]), &album)
+	if err != nil {
+		return nil, err
+	}
+
+	return &album, nil
+}

internal/deezer/media.go

@@ -0,0 +1,27 @@
+package deezer
+
+type Media struct {
+	Errors []MediaError `json:"errors"`
+	Data   []struct {
+		Media []struct {
+			Type    string   `json:"media_type"`
+			Cipher  Cipher   `json:"cipher"`
+			Format  string   `json:"format"`
+			Sources []Source `json:"sources"`
+		}
+	} `json:"data"`
+}
+
+type MediaError struct {
+	Code    int    `json:"code"`
+	Message string `json:"message"`
+}
+
+type Cipher struct {
+	Type string `json:"type"`
+}
+
+type Source struct {
+	URL      string `json:"url"`
+	Provider string `json:"provider"`
+}

internal/deezer/song.go

@@ -0,0 +1,45 @@
+package deezer
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+)
+
+type Song struct {
+	ID         string `json:"SNG_ID"`
+	ArtistName string `json:"ART_NAME"`
+	Title      string `json:"SNG_TITLE"`
+	TrackToken string `json:"TRACK_TOKEN"`
+}
+
+func (s *Song) GetMediaData() (*Media, error) {
+	licenseToken := ""
+	reqBody := fmt.Sprintf(`{"license_token":"%s","media":[{"type":"FULL","formats":[{"cipher":"BF_CBC_STRIPE","format":"FLAC"}]}],"track_tokens":["%s"]}`, licenseToken, s.TrackToken)
+
+	resp, err := http.Post("https://media.deezer.com/v1/get_url", "application/json", bytes.NewBuffer([]byte(reqBody)))
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	body, _ := io.ReadAll(resp.Body)
+
+	var media Media
+	err = json.Unmarshal(body, &media)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(media.Errors) > 0 {
+		if media.Errors[0].Code == 1000 {
+			return nil, fmt.Errorf("invalid license token")
+		}
+
+		return nil, fmt.Errorf("%s", media.Errors[0].Message)
+	}
+
+	return &media, nil
+}