| 1 | package bmsteams |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "fmt" |
| 6 | "os" |
| 7 | "regexp" |
| 8 | "strings" |
| 9 | "time" |
| 10 | |
| 11 | "github.com/davecgh/go-spew/spew" |
| 12 | "github.com/matterbridge-org/matterbridge/bridge" |
| 13 | "github.com/matterbridge-org/matterbridge/bridge/config" |
| 14 | |
| 15 | "github.com/mattn/godown" |
| 16 | msgraph "github.com/yaegashi/msgraph.go/beta" |
| 17 | "github.com/yaegashi/msgraph.go/msauth" |
| 18 | |
| 19 | "golang.org/x/oauth2" |
| 20 | ) |
| 21 | |
| 22 | var ( |
| 23 | defaultScopes = []string{"openid", "profile", "offline_access", "Group.Read.All", "Group.ReadWrite.All"} |
| 24 | attachRE = regexp.MustCompile(`<attachment id=.*?attachment>`) |
| 25 | ) |
| 26 | |
| 27 | type Bmsteams struct { |
| 28 | gc *msgraph.GraphServiceRequestBuilder |
| 29 | ctx context.Context |
| 30 | botID string |
| 31 | *bridge.Config |
| 32 | } |
| 33 | |
| 34 | func New(cfg *bridge.Config) bridge.Bridger { |
| 35 | return &Bmsteams{Config: cfg} |
| 36 | } |
| 37 | |
| 38 | func (b *Bmsteams) Connect() error { |
| 39 | tokenCachePath := b.GetString("sessionFile") |
| 40 | if tokenCachePath == "" { |
| 41 | tokenCachePath = "msteams_session.json" |
| 42 | } |
| 43 | ctx := context.Background() |
| 44 | m := msauth.NewManager() |
| 45 | m.LoadFile(tokenCachePath) //nolint:errcheck |
| 46 | ts, err := m.DeviceAuthorizationGrant(ctx, b.GetString("TenantID"), b.GetString("ClientID"), defaultScopes, nil) |
| 47 | if err != nil { |
| 48 | return err |
| 49 | } |
| 50 | err = m.SaveFile(tokenCachePath) |
| 51 | if err != nil { |
| 52 | b.Log.Errorf("Couldn't save sessionfile in %s: %s", tokenCachePath, err) |
| 53 | } |
| 54 | // make file readable only for matterbridge user |
| 55 | err = os.Chmod(tokenCachePath, 0o600) |
| 56 | if err != nil { |
| 57 | b.Log.Errorf("Couldn't change permissions for %s: %s", tokenCachePath, err) |
| 58 | } |
| 59 | httpClient := oauth2.NewClient(ctx, ts) |
| 60 | graphClient := msgraph.NewClient(httpClient) |
| 61 | b.gc = graphClient |
| 62 | b.ctx = ctx |
| 63 | |
| 64 | err = b.setBotID() |
| 65 | if err != nil { |
| 66 | return err |
| 67 | } |
| 68 | b.Log.Info("Connection succeeded") |
| 69 | return nil |
| 70 | } |
| 71 | |
| 72 | func (b *Bmsteams) Disconnect() error { |
| 73 | return nil |
| 74 | } |
| 75 | |
| 76 | func (b *Bmsteams) JoinChannel(channel config.ChannelInfo) error { |
| 77 | go func(name string) { |
| 78 | for { |
| 79 | err := b.poll(name) |
| 80 | if err != nil { |
| 81 | b.Log.Errorf("polling failed for %s: %s. retrying in 5 seconds", name, err) |
| 82 | } |
| 83 | time.Sleep(time.Second * 5) |
| 84 | } |
| 85 | }(channel.Name) |
| 86 | return nil |
| 87 | } |
| 88 | |
| 89 | func (b *Bmsteams) Send(msg config.Message) (string, error) { |
| 90 | b.Log.Debugf("=> Receiving %#v", msg) |
| 91 | if msg.ParentValid() { |
| 92 | return b.sendReply(msg) |
| 93 | } |
| 94 | |
| 95 | // Handle prefix hint for unthreaded messages. |
| 96 | if msg.ParentNotFound() { |
| 97 | msg.ParentID = "" |
| 98 | msg.Text = fmt.Sprintf("[thread]: %s", msg.Text) |
| 99 | } |
| 100 | |
| 101 | ct := b.gc.Teams().ID(b.GetString("TeamID")).Channels().ID(msg.Channel).Messages().Request() |
| 102 | text := msg.Username + msg.Text |
| 103 | content := &msgraph.ItemBody{Content: &text} |
| 104 | rmsg := &msgraph.ChatMessage{Body: content} |
| 105 | res, err := ct.Add(b.ctx, rmsg) |
| 106 | if err != nil { |
| 107 | return "", err |
| 108 | } |
| 109 | return *res.ID, nil |
| 110 | } |
| 111 | |
| 112 | func (b *Bmsteams) sendReply(msg config.Message) (string, error) { |
| 113 | ct := b.gc.Teams().ID(b.GetString("TeamID")).Channels().ID(msg.Channel).Messages().ID(msg.ParentID).Replies().Request() |
| 114 | // Handle prefix hint for unthreaded messages. |
| 115 | |
| 116 | text := msg.Username + msg.Text |
| 117 | content := &msgraph.ItemBody{Content: &text} |
| 118 | rmsg := &msgraph.ChatMessage{Body: content} |
| 119 | res, err := ct.Add(b.ctx, rmsg) |
| 120 | if err != nil { |
| 121 | return "", err |
| 122 | } |
| 123 | return *res.ID, nil |
| 124 | } |
| 125 | |
| 126 | func (b *Bmsteams) getMessages(channel string) ([]msgraph.ChatMessage, error) { |
| 127 | ct := b.gc.Teams().ID(b.GetString("TeamID")).Channels().ID(channel).Messages().Request() |
| 128 | rct, err := ct.Get(b.ctx) |
| 129 | if err != nil { |
| 130 | return nil, err |
| 131 | } |
| 132 | b.Log.Debugf("got %#v messages", len(rct)) |
| 133 | return rct, nil |
| 134 | } |
| 135 | |
| 136 | //nolint:gocognit |
| 137 | func (b *Bmsteams) poll(channelName string) error { |
| 138 | msgmap := make(map[string]time.Time) |
| 139 | b.Log.Debug("getting initial messages") |
| 140 | res, err := b.getMessages(channelName) |
| 141 | if err != nil { |
| 142 | return err |
| 143 | } |
| 144 | for _, msg := range res { |
| 145 | msgmap[*msg.ID] = *msg.CreatedDateTime |
| 146 | if msg.LastModifiedDateTime != nil { |
| 147 | msgmap[*msg.ID] = *msg.LastModifiedDateTime |
| 148 | } |
| 149 | } |
| 150 | time.Sleep(time.Second * 5) |
| 151 | b.Log.Debug("polling for messages") |
| 152 | for { |
| 153 | res, err := b.getMessages(channelName) |
| 154 | if err != nil { |
| 155 | return err |
| 156 | } |
| 157 | for i := len(res) - 1; i >= 0; i-- { |
| 158 | msg := res[i] |
| 159 | if mtime, ok := msgmap[*msg.ID]; ok { |
| 160 | if mtime == *msg.CreatedDateTime && msg.LastModifiedDateTime == nil { |
| 161 | continue |
| 162 | } |
| 163 | if msg.LastModifiedDateTime != nil && mtime == *msg.LastModifiedDateTime { |
| 164 | continue |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | if b.GetBool("debug") { |
| 169 | b.Log.Debug("Msg dump: ", spew.Sdump(msg)) |
| 170 | } |
| 171 | |
| 172 | // skip non-user message for now. |
| 173 | if msg.From == nil || msg.From.User == nil { |
| 174 | continue |
| 175 | } |
| 176 | |
| 177 | if *msg.From.User.ID == b.botID { |
| 178 | b.Log.Debug("skipping own message") |
| 179 | msgmap[*msg.ID] = *msg.CreatedDateTime |
| 180 | continue |
| 181 | } |
| 182 | |
| 183 | msgmap[*msg.ID] = *msg.CreatedDateTime |
| 184 | if msg.LastModifiedDateTime != nil { |
| 185 | msgmap[*msg.ID] = *msg.LastModifiedDateTime |
| 186 | } |
| 187 | b.Log.Debugf("<= Sending message from %s on %s to gateway", *msg.From.User.DisplayName, b.Account) |
| 188 | text := b.convertToMD(*msg.Body.Content) |
| 189 | rmsg := config.Message{ |
| 190 | Username: *msg.From.User.DisplayName, |
| 191 | Text: text, |
| 192 | Channel: channelName, |
| 193 | Account: b.Account, |
| 194 | Avatar: "", |
| 195 | UserID: *msg.From.User.ID, |
| 196 | ID: *msg.ID, |
| 197 | Extra: make(map[string][]interface{}), |
| 198 | } |
| 199 | |
| 200 | b.handleAttachments(&rmsg, msg) |
| 201 | b.Log.Debugf("<= Message is %#v", rmsg) |
| 202 | b.Remote <- rmsg |
| 203 | } |
| 204 | time.Sleep(time.Second * 5) |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | func (b *Bmsteams) setBotID() error { |
| 209 | req := b.gc.Me().Request() |
| 210 | r, err := req.Get(b.ctx) |
| 211 | if err != nil { |
| 212 | return err |
| 213 | } |
| 214 | b.botID = *r.ID |
| 215 | return nil |
| 216 | } |
| 217 | |
| 218 | func (b *Bmsteams) convertToMD(text string) string { |
| 219 | if !strings.Contains(text, "<div>") { |
| 220 | return text |
| 221 | } |
| 222 | var sb strings.Builder |
| 223 | err := godown.Convert(&sb, strings.NewReader(text), nil) |
| 224 | if err != nil { |
| 225 | b.Log.Errorf("Couldn't convert message to markdown %s", text) |
| 226 | return text |
| 227 | } |
| 228 | return sb.String() |
| 229 | } |
| 230 | |
