feat: download playlists

internal/deezer/resource.go

@@ -0,0 +1,42 @@
+package deezer
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"regexp"
+)
+
+type Resource interface {
+	GetURL(id string) string
+	UnmarshalData(data []byte) error
+	GetSongs() []*Song
+	GetOutputPath(outputDir string) string
+	GetTitle() string
+}
+
+func GetData(r Resource, id string) error {
+	url := r.GetURL(id)
+
+	resp, err := http.Get(url)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		if resp.StatusCode == http.StatusNotFound {
+			return fmt.Errorf("resource not found")
+		}
+		return 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 fmt.Errorf("error parsing response")
+	}
+
+	return r.UnmarshalData([]byte(matches[1]))
+}