Add Nextcloud Talk support (#1167)

Signed-off-by: Gary Kim <gary@garykim.dev>

vendor/gomod.garykim.dev/nc-talk/.drone.yml

@@ -0,0 +1,20 @@
+kind: pipeline
+type: docker
+name: test
+
+steps:
+  - name: golangci-lint
+    image: golangci/golangci-lint:latest-alpine
+    commands:
+      - golangci-lint run
+  - name: build-test
+    image: golang:1.13
+    commands:
+      - go build
+
+trigger:
+  branch:
+    - master
+  event:
+    - pull_request
+    - push

vendor/gomod.garykim.dev/nc-talk/.github_changelog_generator

@@ -0,0 +1,12 @@
+user=gary-kim
+project=go-nc-talk
+add_sections={"dependencies": {"labels": ["dependencies"], "prefix": "### Dependencies"}, "Added": {"labels": ["feature"], "prefix": "### Added"}}
+output=
+header_label=# Go Library for Nextcloud Talk
+enhancement_prefix=### Changed
+deprecated_prefix=### Deprecated
+removed_prefix=### Removed
+security_prefix=### Security
+bug_prefix=### Fixed
+add_pr_wo_labels=false
+issues=false

vendor/gomod.garykim.dev/nc-talk/.golangci.yml

@@ -0,0 +1,26 @@
+# golangci-lint configuration options
+
+linters:
+  enable:
+    - deadcode
+    - errcheck
+    - goimports
+    - golint
+    - ineffassign
+    - structcheck
+    - varcheck
+    - govet
+    - unconvert
+    - prealloc
+    - maligned
+  disable-all: false
+
+issues:
+  # Enable some lints excluded by default
+  exclude-use-default: false
+
+  # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
+  max-per-linter: 0
+
+  # Maximum count of issues with the same text. Set to 0 to disable. Default is 3.
+  max-same-issues: 0

vendor/gomod.garykim.dev/nc-talk/CHANGELOG.md

@@ -0,0 +1,10 @@
+# Go Library for Nextcloud Talk
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [v0.0.1](https://github.com/gary-kim/riotchat/tree/v0.0.1) - 2020-07-10
+
+* First release

vendor/gomod.garykim.dev/nc-talk/LICENSE

@@ -0,0 +1,202 @@
+                                 Apache License
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+
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+

vendor/gomod.garykim.dev/nc-talk/README.md

@@ -0,0 +1,12 @@
+# Go Library for Nextcloud Talk
+
+[![Build Status](https://ghdrone.garykim.dev/api/badges/gary-kim/go-nc-talk/status.svg)](https://ghdrone.garykim.dev/gary-kim/go-nc-talk)
+[![Godoc](https://img.shields.io/badge/godoc-gomod.garykim.dev%2Fnc--talk-informational)](https://pkg.go.dev/gomod.garykim.dev/nc-talk)
+
+A Go library that can be used to communicate with [Nextcloud Talk](https://github.com/nextcloud/spreed) instances.
+
+### License
+
+Copyright © 2020 Gary Kim &lt;<gary@garykim.dev>&gt;, All Rights Reserved
+
+Licensed under [Apache-2.0](LICENSE)

vendor/gomod.garykim.dev/nc-talk/constants/constants.go

@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Gary Kim <gary@garykim.dev>, All Rights Reserved
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package constants
+
+const (
+	// BaseEndpoint is the api endpoint for Nextcloud Talk
+	BaseEndpoint = "/ocs/v2.php/apps/spreed/api/v1/"
+)

vendor/gomod.garykim.dev/nc-talk/go.mod

@@ -0,0 +1,5 @@
+module gomod.garykim.dev/nc-talk
+
+go 1.13
+
+require github.com/monaco-io/request v1.0.3

vendor/gomod.garykim.dev/nc-talk/go.sum

@@ -0,0 +1,2 @@
+github.com/monaco-io/request v1.0.3 h1:FsiIwXCCbHEyWx9A7lgg6JBTMHhHlEEsADsgAOvZ9HA=
+github.com/monaco-io/request v1.0.3/go.mod h1:EmggwHktBsbJmCgwZXqy7o0H1NNsAstQBWZrFVd3xtQ=

vendor/gomod.garykim.dev/nc-talk/gonctalk.go

@@ -0,0 +1,38 @@
+// Copyright (c) 2020 Gary Kim <gary@garykim.dev>, All Rights Reserved
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package talk
+
+import (
+	"gomod.garykim.dev/nc-talk/room"
+	"gomod.garykim.dev/nc-talk/user"
+)
+
+// NewUser returns a TalkUser instance
+func NewUser(url string, username string, password string) *user.TalkUser {
+	return &user.TalkUser{
+		NextcloudURL: url,
+		User:         username,
+		Pass:         password,
+	}
+}
+
+// NewRoom returns a new TalkRoom instance
+func NewRoom(tuser *user.TalkUser, token string) *room.TalkRoom {
+	tr := &room.TalkRoom{
+		User:  tuser,
+		Token: token,
+	}
+	return tr
+}

vendor/gomod.garykim.dev/nc-talk/ocs/message.go

@@ -0,0 +1,52 @@
+// Copyright (c) 2020 Gary Kim <gary@garykim.dev>, All Rights Reserved
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ocs
+
+// MessageType describes what kind of message a returned Nextcloud Talk message is
+type MessageType string
+
+const (
+	// MessageComment is a Nextcloud Talk message that is a comment
+	MessageComment MessageType = "comment"
+
+	// MessageSystem is a Nextcloud Talk message that is a system
+	MessageSystem MessageType = "system"
+
+	// MessageCommand is a Nextcloud Talk message that is a command
+	MessageCommand MessageType = "command"
+)
+
+// TalkRoomMessageData describes the data part of a ocs response for a Talk room message
+type TalkRoomMessageData struct {
+	Message          string      `json:"message"`
+	ID               int         `json:"id"`
+	ActorID          string      `json:"actorId"`
+	ActorDisplayName string      `json:"actorDisplayName"`
+	SystemMessage    string      `json:"systemMessage"`
+	Timestamp        int         `json:"timestamp"`
+	MessageType      MessageType `json:"messageType"`
+}
+
+// TalkRoomMessage describes an ocs response for a Talk room message
+type TalkRoomMessage struct {
+	ocs
+	TalkRoomMessage []TalkRoomMessageData `json:"data"`
+}
+
+// TalkRoomSentResponse describes an ocs response for what is returned when a message is sent
+type TalkRoomSentResponse struct {
+	ocs
+	TalkRoomMessage TalkRoomMessageData `json:"data"`
+}

vendor/gomod.garykim.dev/nc-talk/ocs/ocs.go

@@ -0,0 +1,25 @@
+// Copyright (c) 2020 Gary Kim <gary@garykim.dev>, All Rights Reserved
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ocs
+
+type ocs struct {
+	OCSMeta ocsMeta `json:"meta"`
+}
+
+type ocsMeta struct {
+	Status     string `json:"status"`
+	StatusCode int    `json:"statuscode"`
+	Message    string `json:"message"`
+}

vendor/gomod.garykim.dev/nc-talk/room/room.go

@@ -0,0 +1,150 @@
+// Copyright (c) 2020 Gary Kim <gary@garykim.dev>, All Rights Reserved
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package room
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"io/ioutil"
+	"time"
+
+	"github.com/monaco-io/request"
+
+	"gomod.garykim.dev/nc-talk/constants"
+	"gomod.garykim.dev/nc-talk/ocs"
+	"gomod.garykim.dev/nc-talk/user"
+)
+
+// TalkRoom represents a room in Nextcloud Talk
+type TalkRoom struct {
+	User  *user.TalkUser
+	Token string
+}
+
+// SendMessage sends a message in the Talk room
+func (t *TalkRoom) SendMessage(msg string) (*ocs.TalkRoomMessageData, error) {
+	url := t.User.NextcloudURL + constants.BaseEndpoint + "/chat/" + t.Token
+	requestParams := map[string]string{
+		"message": msg,
+	}
+
+	client := t.User.RequestClient(request.Client{
+		URL:    url,
+		Method: "POST",
+		Params: requestParams,
+	})
+	res, err := client.Do()
+	if err != nil {
+		return nil, err
+	}
+	if res.StatusCode() != 201 {
+		return nil, errors.New("unexpected return code")
+	}
+	var msgInfo struct {
+		OCS ocs.TalkRoomSentResponse `json:"ocs"`
+	}
+	err = json.Unmarshal(res.Data, &msgInfo)
+	return &msgInfo.OCS.TalkRoomMessage, err
+}
+
+// ReceiveMessages starts watching for new messages
+func (t *TalkRoom) ReceiveMessages(ctx context.Context) (chan ocs.TalkRoomMessageData, error) {
+	c := make(chan ocs.TalkRoomMessageData)
+	url := t.User.NextcloudURL + constants.BaseEndpoint + "/chat/" + t.Token
+	requestParam := map[string]string{
+		"lookIntoFuture":   "1",
+		"includeLastKnown": "0",
+	}
+	lastKnown := ""
+	client := t.User.RequestClient(request.Client{
+		URL:     url,
+		Params:  requestParam,
+		Timeout: time.Second * 60,
+	})
+	res, err := client.Resp()
+	if err != nil {
+		return nil, err
+	}
+	lastKnown = res.Header.Get("X-Chat-Last-Given")
+	go func() {
+		for {
+			if ctx.Err() != nil {
+				return
+			}
+			if lastKnown != "" {
+				requestParam["lastKnownMessageId"] = lastKnown
+			}
+			client := t.User.RequestClient(request.Client{
+				URL:     url,
+				Params:  requestParam,
+				Timeout: time.Second * 60,
+			})
+
+			res, err := client.Resp()
+			if err != nil {
+				continue
+			}
+			if res.StatusCode == 200 {
+				lastKnown = res.Header.Get("X-Chat-Last-Given")
+				var message struct {
+					OCS ocs.TalkRoomMessage `json:"ocs"`
+				}
+				data, err := ioutil.ReadAll(res.Body)
+				if err != nil {
+					continue
+				}
+				err = json.Unmarshal(data, &message)
+				if err != nil {
+					continue
+				}
+				for _, msg := range message.OCS.TalkRoomMessage {
+					c <- msg
+				}
+			}
+		}
+	}()
+	return c, nil
+}
+
+// TestConnection tests the connection with the Nextcloud Talk instance and returns an error if it could not connect
+func (t *TalkRoom) TestConnection() error {
+	url := t.User.NextcloudURL + constants.BaseEndpoint + "/chat/" + t.Token
+	requestParam := map[string]string{
+		"lookIntoFuture":   "0",
+		"includeLastKnown": "0",
+	}
+	client := t.User.RequestClient(request.Client{
+		URL:     url,
+		Params:  requestParam,
+		Timeout: time.Second * 30,
+	})
+
+	res, err := client.Do()
+	if err != nil {
+		return err
+	}
+	switch res.StatusCode() {
+	case 200:
+		return nil
+	case 304:
+		return nil
+	case 404:
+		return errors.New("room could not be found")
+	case 412:
+		return errors.New("room is in lobby mode but user is not a moderator")
+	}
+	return errors.New("unknown return code")
+}

vendor/gomod.garykim.dev/nc-talk/user/user.go

@@ -0,0 +1,132 @@
+// Copyright (c) 2020 Gary Kim <gary@garykim.dev>, All Rights Reserved
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package user
+
+import (
+	"encoding/xml"
+	"reflect"
+
+	"github.com/monaco-io/request"
+)
+
+const (
+	ocsCapabilitiesEndpoint = "/ocs/v2.php/cloud/capabilities"
+)
+
+// TalkUser represents a user of Nextcloud Talk
+type TalkUser struct {
+	User         string
+	Pass         string
+	NextcloudURL string
+	capabilities *Capabilities
+}
+
+// Capabilities describes the capabilities that the Nextcloud Talk instance is capable of. Visit https://nextcloud-talk.readthedocs.io/en/latest/capabilities/ for more info.
+type Capabilities struct {
+	Audio                  bool `ocscapability:"audio"`
+	Video                  bool `ocscapability:"video"`
+	Chat                   bool `ocscapability:"chat"`
+	GuestSignaling         bool `ocscapability:"guest-signaling"`
+	EmptyGroupRoom         bool `ocscapability:"empty-group-room"`
+	GuestDisplayNames      bool `ocscapability:"guest-display-names"`
+	MultiRoomUsers         bool `ocscapability:"multi-room-users"`
+	ChatV2                 bool `ocscapability:"chat-v2"`
+	Favorites              bool `ocscapability:"favorites"`
+	LastRoomActivity       bool `ocscapability:"last-room-activity"`
+	NoPing                 bool `ocscapability:"no-ping"`
+	SystemMessages         bool `ocscapability:"system-messages"`
+	MentionFlag            bool `ocscapability:"mention-flag"`
+	InCallFlags            bool `ocscapability:"in-call-flags"`
+	InviteByMail           bool `ocscapability:"invite-by-mail"`
+	NotificationLevels     bool `ocscapability:"notification-levels"`
+	InviteGroupsAndMails   bool `ocscapability:"invite-groups-and-mails"`
+	LockedOneToOneRooms    bool `ocscapability:"locked-one-to-one-rooms"`
+	ReadOnlyRooms          bool `ocscapability:"read-only-rooms"`
+	ChatReadMarker         bool `ocscapability:"chat-read-marker"`
+	WebinaryLobby          bool `ocscapability:"webinary-lobby"`
+	StartCallFlag          bool `ocscapability:"start-call-flag"`
+	ChatReplies            bool `ocscapability:"chat-replies"`
+	CirclesSupport         bool `ocscapability:"circles-support"`
+	AttachmentsAllowed     bool `ocscapability:"config => attachments => allowed"`
+	AttachmentsFolder      bool `ocscapability:"config => attachments => folder"`
+	ConversationsCanCreate bool `ocscapability:"config => conversations => can-create"`
+	ForceMute              bool `ocscapability:"force-mute"`
+	ConversationV2         bool `ocscapability:"conversation-v2"`
+	ChatReferenceID        bool `ocscapability:"chat-reference-id"`
+}
+
+type capabilitiesRequest struct {
+	XMLName      xml.Name `xml:"ocs"`
+	Capabilities []string `xml:"ocs>data>capabilities>spreed>features>element"`
+}
+
+// RequestClient returns a monaco-io that is preconfigured to make OCS API calls
+func (t *TalkUser) RequestClient(client request.Client) *request.Client {
+	if client.Header == nil {
+		client.Header = make(map[string]string)
+	}
+	if client.Header["OCS-APIRequest"] == "" {
+		client.Header["OCS-APIRequest"] = "true"
+	}
+	if client.Header["Accept"] == "" {
+		client.Header["Accept"] = "application/json"
+	}
+	client.BasicAuth = request.BasicAuth{
+		Username: t.User,
+		Password: t.Pass,
+	}
+	return &client
+}
+
+// Capabilities returns an instance of Capabilities that describes what the Nextcloud Talk instance supports
+func (t *TalkUser) Capabilities() (*Capabilities, error) {
+	if t.capabilities != nil {
+		return t.capabilities, nil
+	}
+
+	client := t.RequestClient(request.Client{
+		URL: ocsCapabilitiesEndpoint,
+		Header: map[string]string{
+			"Accept": "application/xml",
+		},
+	})
+	res, err := client.Do()
+	if err != nil {
+		return nil, err
+	}
+
+	capabilities := &capabilitiesRequest{}
+	err = xml.Unmarshal(res.Data, capabilities)
+	if err != nil {
+		return nil, err
+	}
+
+	tr := &Capabilities{}
+
+	c := reflect.ValueOf(tr)
+	for i := 0; i < c.NumField(); i++ {
+		field := c.Field(i)
+		tag := field.Type().Field(0).Tag.Get("ocscapability")
+
+		for _, capability := range capabilities.Capabilities {
+			if capability == tag && field.CanSet() {
+				field.SetBool(true)
+			}
+		}
+	}
+
+	t.capabilities = tr
+	return tr, nil
+}