Use mattermost v5 module (#1192)

vendor/github.com/mattermost/mattermost-server/v5/model/channel_view.go

@@ -0,0 +1,41 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+import (
+	"encoding/json"
+	"io"
+)
+
+type ChannelView struct {
+	ChannelId     string `json:"channel_id"`
+	PrevChannelId string `json:"prev_channel_id"`
+}
+
+func (o *ChannelView) ToJson() string {
+	b, _ := json.Marshal(o)
+	return string(b)
+}
+
+func ChannelViewFromJson(data io.Reader) *ChannelView {
+	var o *ChannelView
+	json.NewDecoder(data).Decode(&o)
+	return o
+}
+
+type ChannelViewResponse struct {
+	Status            string           `json:"status"`
+	LastViewedAtTimes map[string]int64 `json:"last_viewed_at_times"`
+}
+
+func (o *ChannelViewResponse) ToJson() string {
+	b, _ := json.Marshal(o)
+	return string(b)
+}
+
+func ChannelViewResponseFromJson(data io.Reader) *ChannelViewResponse {
+	var o *ChannelViewResponse
+	json.NewDecoder(data).Decode(&o)
+	return o
+}