treewide: upgrading to latest mautrix standards

Signed-off-by: Sumner Evans <sumner@beeper.com>

segment.go

@@ -0,0 +1,90 @@
+// mautrix-groupme - A Matrix-GroupMe puppeting bridge.
+// Copyright (C) 2022 Sumner Evans, Karmanyaah Malhotra
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	log "maunium.net/go/maulogger/v2"
+	"maunium.net/go/mautrix/id"
+)
+
+const SegmentURL = "https://api.segment.io/v1/track"
+
+type SegmentClient struct {
+	key    string
+	log    log.Logger
+	client http.Client
+}
+
+var Segment SegmentClient
+
+func (sc *SegmentClient) trackSync(userID id.UserID, event string, properties map[string]interface{}) error {
+	var buf bytes.Buffer
+	err := json.NewEncoder(&buf).Encode(map[string]interface{}{
+		"userId":     userID,
+		"event":      event,
+		"properties": properties,
+	})
+	if err != nil {
+		return err
+	}
+
+	req, err := http.NewRequest("POST", SegmentURL, &buf)
+	if err != nil {
+		return err
+	}
+	req.SetBasicAuth(sc.key, "")
+	resp, err := sc.client.Do(req)
+	if err != nil {
+		return err
+	}
+	_ = resp.Body.Close()
+	if resp.StatusCode != 200 {
+		return fmt.Errorf("unexpected status code %d", resp.StatusCode)
+	}
+	return nil
+}
+
+func (sc *SegmentClient) IsEnabled() bool {
+	return len(sc.key) > 0
+}
+
+func (sc *SegmentClient) Track(userID id.UserID, event string, properties ...map[string]interface{}) {
+	if !sc.IsEnabled() {
+		return
+	} else if len(properties) > 1 {
+		panic("Track should be called with at most one property map")
+	}
+
+	go func() {
+		props := map[string]interface{}{}
+		if len(properties) > 0 {
+			props = properties[0]
+		}
+		props["bridge"] = "groupme"
+		err := sc.trackSync(userID, event, props)
+		if err != nil {
+			sc.log.Errorfln("Error tracking %s: %v", event, err)
+		} else {
+			sc.log.Debugln("Tracked", event)
+		}
+	}()
+}