149 lines
3.0 KiB
Go
149 lines
3.0 KiB
Go
package lemmy
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import (
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"bytes"
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"context"
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"encoding/json"
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"io"
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"net/http"
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"net/url"
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"github.com/google/go-querystring/query"
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"go.elara.ws/go-lemmy/types"
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)
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// Client is a client for Lemmy's HTTP API
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type Client struct {
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client *http.Client
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baseURL *url.URL
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Token string
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}
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// New creates a new Lemmy client with the default HTTP client.
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func New(baseURL string) (*Client, error) {
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return NewWithClient(baseURL, http.DefaultClient)
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}
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// NewWithClient creates a new Lemmy client with the given HTTP client
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func NewWithClient(baseURL string, client *http.Client) (*Client, error) {
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u, err := url.Parse(baseURL)
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if err != nil {
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return nil, err
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}
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u = u.JoinPath("/api/v3")
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return &Client{baseURL: u, client: client}, nil
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}
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// ClientLogin logs in to Lemmy by calling the Lemmy endpoint,
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// and stores the returned token for use in future requests.
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func (c *Client) ClientLogin(ctx context.Context, l types.Login) error {
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lr, err := c.Login(ctx, l)
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if err != nil {
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return err
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}
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c.Token = lr.JWT.ValueOrEmpty()
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return nil
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}
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// req makes a request to the server
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func (c *Client) req(ctx context.Context, method string, path string, data, resp any) (*http.Response, error) {
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var r io.Reader
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if data != nil {
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jsonData, err := json.Marshal(data)
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if err != nil {
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return nil, err
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}
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r = bytes.NewReader(jsonData)
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}
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req, err := http.NewRequestWithContext(
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ctx,
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method,
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c.baseURL.JoinPath(path).String(),
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r,
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)
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if err != nil {
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return nil, err
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}
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req.Header.Add("Content-Type", "application/json")
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if c.Token != "" {
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req.Header.Add("Authorization", "Bearer "+c.Token)
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}
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res, err := c.client.Do(req)
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if err != nil {
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return nil, err
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}
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defer res.Body.Close()
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err = json.NewDecoder(res.Body).Decode(resp)
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if err == io.EOF {
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return res, nil
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} else if err != nil {
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return nil, err
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}
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return res, nil
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}
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// getReq makes a get request to the Lemmy server.
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// It's separate from req() because it uses query
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// parameters rather than a JSON request body.
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func (c *Client) getReq(ctx context.Context, method string, path string, data, resp any) (*http.Response, error) {
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getURL := c.baseURL.JoinPath(path)
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if data != nil {
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vals, err := query.Values(data)
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if err != nil {
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return nil, err
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}
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getURL.RawQuery = vals.Encode()
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}
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req, err := http.NewRequestWithContext(
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ctx,
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method,
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getURL.String(),
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nil,
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)
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if err != nil {
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return nil, err
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}
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if c.Token != "" {
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req.Header.Add("Authorization", "Bearer "+c.Token)
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}
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res, err := c.client.Do(req)
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if err != nil {
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return nil, err
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}
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defer res.Body.Close()
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err = json.NewDecoder(res.Body).Decode(resp)
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if err == io.EOF {
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return res, nil
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} else if err != nil {
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return nil, err
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}
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return res, nil
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}
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// resError returns an error if the the response contains an error
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func resError(res *http.Response, lr types.LemmyResponse) error {
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if lr.Error.IsValid() {
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return types.LemmyError{
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Code: res.StatusCode,
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ErrStr: lr.Error.MustValue(),
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}
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} else if res.StatusCode != http.StatusOK {
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return types.HTTPError{
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Code: res.StatusCode,
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}
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} else {
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return nil
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}
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}
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