refactor: major project restructure

internal/deezer/resource.go

@@ -1,65 +1,9 @@
 package deezer
 
-import (
-	"bytes"
-	"encoding/json"
-	"fmt"
-	"io"
-	"net/http"
-	"strings"
-)
-
 type Resource interface {
-	GetType() string
-	UnmarshalData(data []byte) error
-	GetSongs() []*Song
-	GetOutputPath(outputDir string) string
 	GetTitle() string
-}
-
-func (s *Session) GetData(r Resource, id string) error {
-	payload := map[string]interface{}{
-		"nb":          10000,
-		"start":       0,
-		"playlist_id": id,
-		"alb_id":      id,
-		"lang":        "en",
-		"tab":         0,
-		"tags":        true,
-		"header":      true,
-	}
-	jsonData, err := json.Marshal(payload)
-	if err != nil {
-		return err
-	}
-
-	url := fmt.Sprintf("https://www.deezer.com/ajax/gw-light.php?method=deezer.page%s&input=3&api_version=1.0&api_token=%s", r.GetType(), s.APIToken)
-	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
-	if err != nil {
-		return err
-	}
-
-	resp, err := s.Client.Do(req)
-	if err != nil {
-		return err
-	}
-	defer resp.Body.Close()
-
-	if resp.StatusCode != http.StatusOK {
-		return fmt.Errorf("unexpected status code: %d", resp.StatusCode)
-	}
-
-	body, _ := io.ReadAll(resp.Body)
-
-	if strings.Contains(string(body), `"DATA_ERROR":"playlist::getData"`) {
-		return fmt.Errorf("invalid playlist ID")
-	}
-	if strings.Contains(string(body), `"DATA_ERROR":"album::getData"`) {
-		return fmt.Errorf("invalid album ID")
-	}
-	if strings.Contains(string(body), `"results":{}`) {
-		return fmt.Errorf("unexpected response")
-	}
-
-	return r.UnmarshalData(body)
+	GetType() string
+	GetSongs() []*Song
+	GetOutputDir(outputDir string) string
+	Unmarshal(data []byte) error
 }