Move functions into their own, separate files & add docs

simulcast.go

@@ -1,5 +1,37 @@
 package crunchyroll
 
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+)
+
+// Simulcasts returns all available simulcast seasons for the current locale.
+func (c *Crunchyroll) Simulcasts() (s []*Simulcast, err error) {
+	seasonListEndpoint := fmt.Sprintf("https://beta.crunchyroll.com/content/v1/season_list?locale=%s", c.Locale)
+	resp, err := c.request(seasonListEndpoint, http.MethodGet)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	var jsonBody map[string]interface{}
+	if err = json.NewDecoder(resp.Body).Decode(&jsonBody); err != nil {
+		return nil, fmt.Errorf("failed to parse 'season_list' response: %w", err)
+	}
+
+	for _, item := range jsonBody["items"].([]interface{}) {
+		simulcast := &Simulcast{}
+		if err := decodeMapToStruct(item, simulcast); err != nil {
+			return nil, err
+		}
+
+		s = append(s, simulcast)
+	}
+
+	return s, nil
+}
+
 // Simulcast contains all information about a simulcast season.
 type Simulcast struct {
 	ID string `json:"id"`