Add dependencies/vendor (whatsapp)

vendor/go.mau.fi/whatsmeow/mediaconn.go

@@ -0,0 +1,93 @@
+// Copyright (c) 2021 Tulir Asokan
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package whatsmeow
+
+import (
+	"fmt"
+	"time"
+
+	waBinary "go.mau.fi/whatsmeow/binary"
+	"go.mau.fi/whatsmeow/types"
+)
+
+//type MediaConnIP struct {
+//	IP4 net.IP
+//	IP6 net.IP
+//}
+
+// MediaConnHost represents a single host to download media from.
+type MediaConnHost struct {
+	Hostname string
+	//IPs      []MediaConnIP
+}
+
+// MediaConn contains a list of WhatsApp servers from which attachments can be downloaded from.
+type MediaConn struct {
+	Auth       string
+	AuthTTL    int
+	TTL        int
+	MaxBuckets int
+	FetchedAt  time.Time
+	Hosts      []MediaConnHost
+}
+
+// Expiry returns the time when the MediaConn expires.
+func (mc *MediaConn) Expiry() time.Time {
+	return mc.FetchedAt.Add(time.Duration(mc.TTL) * time.Second)
+}
+
+func (cli *Client) refreshMediaConn(force bool) error {
+	cli.mediaConnLock.Lock()
+	defer cli.mediaConnLock.Unlock()
+	if cli.mediaConn == nil || force || time.Now().After(cli.mediaConn.Expiry()) {
+		var err error
+		cli.mediaConn, err = cli.queryMediaConn()
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (cli *Client) queryMediaConn() (*MediaConn, error) {
+	resp, err := cli.sendIQ(infoQuery{
+		Namespace: "w:m",
+		Type:      "set",
+		To:        types.ServerJID,
+		Content:   []waBinary.Node{{Tag: "media_conn"}},
+	})
+	if err != nil {
+		return nil, fmt.Errorf("failed to query media connections: %w", err)
+	} else if len(resp.GetChildren()) == 0 || resp.GetChildren()[0].Tag != "media_conn" {
+		return nil, fmt.Errorf("failed to query media connections: unexpected child tag")
+	}
+	respMC := resp.GetChildren()[0]
+	var mc MediaConn
+	ag := respMC.AttrGetter()
+	mc.FetchedAt = time.Now()
+	mc.Auth = ag.String("auth")
+	mc.TTL = ag.Int("ttl")
+	mc.AuthTTL = ag.Int("auth_ttl")
+	mc.MaxBuckets = ag.Int("max_buckets")
+	if !ag.OK() {
+		return nil, fmt.Errorf("failed to parse media connections: %+v", ag.Errors)
+	}
+	for _, child := range respMC.GetChildren() {
+		if child.Tag != "host" {
+			cli.Log.Warnf("Unexpected child in media_conn element: %s", child.XMLString())
+			continue
+		}
+		cag := child.AttrGetter()
+		mc.Hosts = append(mc.Hosts, MediaConnHost{
+			Hostname: cag.String("hostname"),
+		})
+		if !cag.OK() {
+			return nil, fmt.Errorf("failed to parse media connection host: %+v", ag.Errors)
+		}
+	}
+	return &mc, nil
+}