90 lines
2.1 KiB
Go
90 lines
2.1 KiB
Go
package reddit
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import (
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"errors"
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"net/http"
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"net/url"
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"os"
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)
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// Opt is a configuration option to initialize a client.
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type Opt func(*Client) error
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// WithCredentials sets the credentials used to authenticate with the Reddit API.
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func WithCredentials(id, secret, username, password string) Opt {
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return func(c *Client) error {
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c.ID = id
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c.Secret = secret
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c.Username = username
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c.Password = password
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return nil
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}
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}
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// WithHTTPClient sets the HTTP client which will be used to make requests.
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func WithHTTPClient(httpClient *http.Client) Opt {
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return func(c *Client) error {
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if httpClient == nil {
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return errors.New("httpClient: cannot be nil")
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}
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c.client = httpClient
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return nil
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}
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}
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// WithUserAgent sets the User-Agent header for requests made with the client.
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// Reddit recommends the following format for the user agent:
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// <platform>:<app ID>:<version string> (by /u/<reddit username>)
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func WithUserAgent(ua string) Opt {
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return func(c *Client) error {
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c.userAgent = ua
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return nil
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}
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}
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// WithBaseURL sets the base URL for the client to make requests to.
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func WithBaseURL(u string) Opt {
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return func(c *Client) error {
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url, err := url.Parse(u)
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if err != nil {
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return err
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}
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c.BaseURL = url
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return nil
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}
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}
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// WithTokenURL sets the url used to get access tokens.
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func WithTokenURL(u string) Opt {
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return func(c *Client) error {
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url, err := url.Parse(u)
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if err != nil {
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return err
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}
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c.TokenURL = url
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return nil
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}
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}
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// FromEnv configures the client with values from environment variables.
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// Supported environment variables:
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// GO_REDDIT_CLIENT_ID to set the client's id.
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// GO_REDDIT_CLIENT_SECRET to set the client's secret.
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// GO_REDDIT_CLIENT_USERNAME to set the client's username.
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// GO_REDDIT_CLIENT_PASSWORD to set the client's password.
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func FromEnv(c *Client) error {
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if v := os.Getenv("GO_REDDIT_CLIENT_ID"); v != "" {
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c.ID = v
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}
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if v := os.Getenv("GO_REDDIT_CLIENT_SECRET"); v != "" {
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c.Secret = v
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}
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if v := os.Getenv("GO_REDDIT_CLIENT_USERNAME"); v != "" {
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c.Username = v
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}
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if v := os.Getenv("GO_REDDIT_CLIENT_PASSWORD"); v != "" {
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c.Password = v
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}
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return nil
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}
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