feat(client)!: simplify Client by extracting API methods to APIClient

BREAKING CHANGE: All API request related moved from Client to APIClient type.

options.go

@@ -0,0 +1,70 @@
+package midjourney
+
+import (
+	"net/url"
+	"strings"
+
+	"github.com/rs/zerolog"
+)
+
+type Option interface {
+	apply(*APIClient) error
+}
+
+type optionFunc func(*APIClient) error
+
+func (fn optionFunc) apply(o *APIClient) error {
+	return fn(o)
+}
+
+// WithAuthToken returns a new Option type which sets the auth token that the
+// client will use. The authToken value can be fetched from the
+// "__Secure-next-auth.session-token" cookie on the midjourney.com website.
+func WithAuthToken(authToken string) Option {
+	return optionFunc(func(c *APIClient) error {
+		c.AuthToken = authToken
+
+		return nil
+	})
+}
+
+func WithAPIURL(baseURL string) Option {
+	return optionFunc(func(c *APIClient) error {
+		if !strings.HasSuffix(baseURL, "/") {
+			baseURL += "/"
+		}
+
+		u, err := url.Parse(baseURL)
+		if err != nil {
+			return err
+		}
+
+		c.APIURL = u
+
+		return nil
+	})
+}
+
+func WithHTTPClient(httpClient HTTPClient) Option {
+	return optionFunc(func(c *APIClient) error {
+		c.HTTPClient = httpClient
+
+		return nil
+	})
+}
+
+func WithUserAgent(userAgent string) Option {
+	return optionFunc(func(c *APIClient) error {
+		c.UserAgent = userAgent
+
+		return nil
+	})
+}
+
+func WithLogger(logger zerolog.Logger) Option {
+	return optionFunc(func(c *APIClient) error {
+		c.Logger = logger
+
+		return nil
+	})
+}