Move everything to new reddit/ folder

Signed-off-by: Vartan Benohanian <vartanbeno@gmail.com>

reddit/reddit-options.go

@@ -0,0 +1,73 @@
+package reddit
+
+import (
+	"net/url"
+	"os"
+)
+
+// Opt is a configuration option to initialize a client.
+type Opt func(*Client) error
+
+// FromEnv configures the client with values from environment variables.
+//
+// Supported environment variables:
+// GO_REDDIT_CLIENT_ID to set the client's id.
+// GO_REDDIT_CLIENT_SECRET to set the client's secret.
+// GO_REDDIT_CLIENT_USERNAME to set the client's username.
+// GO_REDDIT_CLIENT_PASSWORD to set the client's password.
+func FromEnv(c *Client) error {
+	if v, ok := os.LookupEnv("GO_REDDIT_CLIENT_ID"); ok {
+		c.ID = v
+	}
+
+	if v, ok := os.LookupEnv("GO_REDDIT_CLIENT_SECRET"); ok {
+		c.Secret = v
+	}
+
+	if v, ok := os.LookupEnv("GO_REDDIT_CLIENT_USERNAME"); ok {
+		c.Username = v
+	}
+
+	if v, ok := os.LookupEnv("GO_REDDIT_CLIENT_PASSWORD"); ok {
+		c.Password = v
+	}
+
+	return nil
+}
+
+// WithCredentials sets the necessary values for the client to authenticate via OAuth2.
+func WithCredentials(id, secret, username, password string) Opt {
+	return func(c *Client) error {
+		c.ID = id
+		c.Secret = secret
+		c.Username = username
+		c.Password = password
+		return nil
+	}
+}
+
+// WithBaseURL sets the base URL for the client to make requests to.
+func WithBaseURL(u string) Opt {
+	return func(c *Client) error {
+		url, err := url.Parse(u)
+		if err != nil {
+			return err
+		}
+
+		c.BaseURL = url
+		return nil
+	}
+}
+
+// WithTokenURL sets the url used to get access tokens.
+func WithTokenURL(u string) Opt {
+	return func(c *Client) error {
+		url, err := url.Parse(u)
+		if err != nil {
+			return err
+		}
+
+		c.TokenURL = url
+		return nil
+	}
+}