package lemmy import ( "bytes" "context" "encoding/json" "io" "net/http" "net/url" "reflect" "github.com/google/go-querystring/query" "go.arsenm.dev/go-lemmy/types" ) type Client struct { client *http.Client baseURL *url.URL token string } func New(baseURL string) (*Client, error) { return NewWithClient(baseURL, http.DefaultClient) } func NewWithClient(baseURL string, client *http.Client) (*Client, error) { u, err := url.Parse(baseURL) if err != nil { return nil, err } u = u.JoinPath("/api/v3") return &Client{baseURL: u, client: client}, nil } func (c *Client) Login(ctx context.Context, l types.Login) error { var lr types.LoginResponse res, err := c.req(ctx, http.MethodPost, "/user/login", l, &lr) if err != nil { return err } err = resError(res, lr.LemmyResponse) if err != nil { return err } c.token = lr.JWT.MustValue() return nil } func (c *Client) Token() string { return c.token } func (c *Client) SetToken(t string) { c.token = t } func (c *Client) req(ctx context.Context, method string, path string, data, resp any) (*http.Response, error) { data = c.setAuth(data) var r io.Reader if data != nil { jsonData, err := json.Marshal(data) if err != nil { return nil, err } r = bytes.NewReader(jsonData) } req, err := http.NewRequestWithContext( ctx, method, c.baseURL.JoinPath(path).String(), r, ) if err != nil { return nil, err } req.Header.Add("Content-Type", "application/json") res, err := c.client.Do(req) if err != nil { return nil, err } defer res.Body.Close() err = json.NewDecoder(res.Body).Decode(resp) if err == io.EOF { return res, nil } else if err != nil { return nil, err } return res, nil } func (c *Client) getReq(ctx context.Context, method string, path string, data, resp any) (*http.Response, error) { data = c.setAuth(data) getURL := c.baseURL.JoinPath(path) vals, err := query.Values(data) if err != nil { return nil, err } getURL.RawQuery = vals.Encode() req, err := http.NewRequestWithContext( ctx, method, getURL.String(), nil, ) if err != nil { return nil, err } res, err := c.client.Do(req) if err != nil { return nil, err } defer res.Body.Close() err = json.NewDecoder(res.Body).Decode(resp) if err == io.EOF { return res, nil } else if err != nil { return nil, err } return res, nil } func resError(res *http.Response, lr types.LemmyResponse) error { if lr.Error.IsValid() { return types.LemmyError{ Code: res.StatusCode, ErrStr: lr.Error.MustValue(), } } else if res.StatusCode > 299 { return types.HTTPError{ Code: res.StatusCode, } } else { return nil } } func (c *Client) setAuth(data any) any { if data == nil { return data } val := reflect.New(reflect.TypeOf(data)) val.Elem().Set(reflect.ValueOf(data)) authField := val.Elem().FieldByName("Auth") if !authField.IsValid() { return data } authType := authField.Kind() if authType != reflect.String { return data } authField.SetString(c.token) return val.Elem().Interface() }