110 lines
2.2 KiB
Go
110 lines
2.2 KiB
Go
package mastodon
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import (
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"bufio"
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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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"path"
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"strings"
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"time"
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)
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// UpdateEvent is struct for passing status event to app.
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type UpdateEvent struct{ Status *Status }
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func (e *UpdateEvent) event() {}
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// NotificationEvent is struct for passing notification event to app.
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type NotificationEvent struct{}
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func (e *NotificationEvent) event() {}
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// DeleteEvent is struct for passing deletion event to app.
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type DeleteEvent struct{ ID int64 }
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func (e *DeleteEvent) event() {}
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// ErrorEvent is struct for passing errors to app.
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type ErrorEvent struct{ err error }
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func (e *ErrorEvent) event() {}
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func (e *ErrorEvent) Error() string { return e.err.Error() }
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// Event is interface passing events to app.
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type Event interface {
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event()
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}
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func handleReader(ctx context.Context, q chan Event, r io.Reader) error {
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name := ""
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s := bufio.NewScanner(r)
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for s.Scan() {
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line := s.Text()
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token := strings.SplitN(line, ":", 2)
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if len(token) != 2 {
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continue
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}
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switch strings.TrimSpace(token[0]) {
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case "event":
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name = strings.TrimSpace(token[1])
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case "data":
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switch name {
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case "update":
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var status Status
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err := json.Unmarshal([]byte(token[1]), &status)
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if err == nil {
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q <- &UpdateEvent{&status}
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}
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case "notification":
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case "delete":
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}
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default:
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}
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}
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return ctx.Err()
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}
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// StreamingPublic return channel to read events.
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func (c *Client) StreamingPublic(ctx context.Context) (chan Event, error) {
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u, err := url.Parse(c.config.Server)
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if err != nil {
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return nil, err
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}
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u.Path = path.Join(u.Path, "/api/v1/streaming/public")
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var resp *http.Response
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q := make(chan Event, 10)
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go func() {
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defer ctx.Done()
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for {
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req, err := http.NewRequest(http.MethodGet, u.String(), nil)
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if err == nil {
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req.Header.Set("Authorization", "Bearer "+c.config.AccessToken)
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resp, err = c.Do(req)
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}
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if err == nil {
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err = handleReader(ctx, q, resp.Body)
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resp.Body.Close()
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if err == nil {
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break
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}
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} else {
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q <- &ErrorEvent{err}
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}
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time.Sleep(3 * time.Second)
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}
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}()
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go func() {
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<-ctx.Done()
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if resp != nil && resp.Body != nil {
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resp.Body.Close()
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}
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}()
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return q, nil
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}
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