--- a/vendor/github.com/McKael/madon/v2/streams.go Thu Sep 22 16:37:07 2022 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,177 +0,0 @@
-/*
-Copyright 2017-2018 Mikael Berthe
-
-Licensed under the MIT license. Please see the LICENSE file is this directory.
-*/
-
-package madon
-
-import (
- "encoding/json"
- "net/url"
- "strings"
-
- "github.com/gorilla/websocket"
- "github.com/pkg/errors"
-)
-
-// StreamEvent contains a single event from the streaming API
-type StreamEvent struct {
- Event string // Name of the event (error, update, notification or delete)
- Data interface{} // Status, Notification or status ID
- Error error // Error message from the StreamListener
-}
-
-// openStream opens a stream URL and returns an http.Response
-// Note that the caller should close the connection when it's done reading
-// the stream.
-// The stream name can be "user", "local", "public", "direct", "list" or
-// "hashtag".
-// When it is "hashtag", the param argument contains the hashtag.
-// When it is "list", the param argument contains the list ID.
-func (mc *Client) openStream(streamName, param string) (*websocket.Conn, error) {
- var tag, list string
-
- switch streamName {
- case "user", "public", "public:local", "direct":
- case "hashtag":
- if param == "" {
- return nil, ErrInvalidParameter
- }
- tag = param
- case "list":
- if param == "" {
- return nil, ErrInvalidParameter
- }
- list = param
- default:
- return nil, ErrInvalidParameter
- }
-
- if !strings.HasPrefix(mc.APIBase, "http") {
- return nil, errors.New("cannot create Websocket URL: unexpected API base URL")
- }
-
- // Build streaming websocket URL
- u, err := url.Parse("ws" + mc.APIBase[4:] + "/v1/streaming/")
- if err != nil {
- return nil, errors.Wrap(err, "cannot create Websocket URL")
- }
-
- urlParams := url.Values{}
- urlParams.Add("stream", streamName)
- urlParams.Add("access_token", mc.UserToken.AccessToken)
- if tag != "" {
- urlParams.Add("tag", tag)
- } else if list != "" {
- urlParams.Add("list", list)
- }
- u.RawQuery = urlParams.Encode()
-
- c, _, err := websocket.DefaultDialer.Dial(u.String(), nil)
- return c, err
-}
-
-// readStream reads from the http.Response and sends events to the events channel
-// It stops when the connection is closed or when the stopCh channel is closed.
-// The foroutine will close the doneCh channel when it terminates.
-func (mc *Client) readStream(events chan<- StreamEvent, stopCh <-chan bool, doneCh chan bool, c *websocket.Conn) {
- defer c.Close()
- defer close(doneCh)
-
- go func() {
- select {
- case <-stopCh:
- // Close connection
- c.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""))
- case <-doneCh:
- // Leave
- }
- }()
-
- for {
- var msg struct {
- Event string
- Payload interface{}
- }
-
- err := c.ReadJSON(&msg)
- if err != nil {
- if strings.Contains(err.Error(), "close 1000 (normal)") {
- break // Connection properly closed
- }
- e := errors.Wrap(err, "read error")
- events <- StreamEvent{Event: "error", Error: e}
- break
- }
-
- var obj interface{}
-
- // Decode API object
- switch msg.Event {
- case "update":
- strPayload, ok := msg.Payload.(string)
- if !ok {
- e := errors.New("could not decode status: payload isn't a string")
- events <- StreamEvent{Event: "error", Error: e}
- continue
- }
- var s Status
- if err := json.Unmarshal([]byte(strPayload), &s); err != nil {
- e := errors.Wrap(err, "could not decode status")
- events <- StreamEvent{Event: "error", Error: e}
- continue
- }
- obj = s
- case "notification":
- strPayload, ok := msg.Payload.(string)
- if !ok {
- e := errors.New("could not decode notification: payload isn't a string")
- events <- StreamEvent{Event: "error", Error: e}
- continue
- }
- var notif Notification
- if err := json.Unmarshal([]byte(strPayload), ¬if); err != nil {
- e := errors.Wrap(err, "could not decode notification")
- events <- StreamEvent{Event: "error", Error: e}
- continue
- }
- obj = notif
- case "delete":
- strPayload, ok := msg.Payload.(string)
- if !ok {
- e := errors.New("could not decode deletion: payload isn't a string")
- events <- StreamEvent{Event: "error", Error: e}
- continue
- }
- obj = strPayload // statusID
- default:
- e := errors.Errorf("unhandled event '%s'", msg.Event)
- events <- StreamEvent{Event: "error", Error: e}
- continue
- }
-
- // Send event to the channel
- events <- StreamEvent{Event: msg.Event, Data: obj}
- }
-}
-
-// StreamListener listens to a stream from the Mastodon server
-// The stream 'name' can be "user", "local", "public" or "hashtag".
-// For 'hashtag', the hashTag argument cannot be empty.
-// The events are sent to the events channel (the errors as well).
-// The streaming is terminated if the 'stopCh' channel is closed.
-// The 'doneCh' channel is closed if the connection is closed by the server.
-// Please note that this method launches a goroutine to listen to the events.
-func (mc *Client) StreamListener(name, hashTag string, events chan<- StreamEvent, stopCh <-chan bool, doneCh chan bool) error {
- if mc == nil {
- return ErrUninitializedClient
- }
-
- conn, err := mc.openStream(name, hashTag)
- if err != nil {
- return err
- }
- go mc.readStream(events, stopCh, doneCh, conn)
- return nil
-}