MM-13664 Cache external link metadata when populating post metadata (#10128)

* MM-13664 Added LinkMetadata types

* MM-13664 Use LinkMetadata when populating post metadata

* Fix unused import

* Fix index name on SQLite

* Finish adding unit tests

* Address feedback

* Increase max length of URL column to 2048 characters

store/layered_store.go

@@ -187,6 +187,10 @@ func (s *LayeredStore) Group() GroupStore {
 	return s.GroupStore
 }
 
+func (s *LayeredStore) LinkMetadata() LinkMetadataStore {
+	return s.DatabaseLayer.LinkMetadata()
+}
+
 func (s *LayeredStore) MarkSystemRanUnitTests() {
 	s.DatabaseLayer.MarkSystemRanUnitTests()
 }

store/sqlstore/link_metadata_store.go

@@ -0,0 +1,88 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package sqlstore
+
+import (
+	"database/sql"
+	"net/http"
+
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/store"
+)
+
+type SqlLinkMetadataStore struct {
+	SqlStore
+}
+
+func NewSqlLinkMetadataStore(sqlStore SqlStore) store.LinkMetadataStore {
+	s := &SqlLinkMetadataStore{sqlStore}
+
+	for _, db := range sqlStore.GetAllConns() {
+		table := db.AddTableWithName(model.LinkMetadata{}, "LinkMetadata").SetKeys(false, "Hash")
+		table.ColMap("URL").SetMaxSize(2048)
+		table.ColMap("Type").SetMaxSize(16)
+		table.ColMap("Data").SetMaxSize(4096)
+	}
+
+	return s
+}
+
+func (s SqlLinkMetadataStore) CreateIndexesIfNotExists() {
+	if s.DriverName() == model.DATABASE_DRIVER_MYSQL {
+		s.CreateCompositeIndexIfNotExists("idx_link_metadata_url_timestamp", "LinkMetadata", []string{"URL(512)", "Timestamp"})
+	} else {
+		s.CreateCompositeIndexIfNotExists("idx_link_metadata_url_timestamp", "LinkMetadata", []string{"URL", "Timestamp"})
+	}
+}
+
+func (s SqlLinkMetadataStore) Save(metadata *model.LinkMetadata) store.StoreChannel {
+	return store.Do(func(result *store.StoreResult) {
+		if result.Err = metadata.IsValid(); result.Err != nil {
+			return
+		}
+
+		metadata.PreSave()
+
+		err := s.GetMaster().Insert(metadata)
+		if err != nil {
+			result.Err = model.NewAppError("SqlLinkMetadataStore.Save", "store.sql_link_metadata.save.app_error", nil, "url="+metadata.URL+", "+err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		result.Data = metadata
+	})
+}
+
+func (s SqlLinkMetadataStore) Get(url string, timestamp int64) store.StoreChannel {
+	return store.Do(func(result *store.StoreResult) {
+		var metadata *model.LinkMetadata
+
+		err := s.GetReplica().SelectOne(&metadata,
+			`SELECT
+				*
+			FROM
+				LinkMetadata
+			WHERE
+				URL = :URL
+				AND Timestamp = :Timestamp`, map[string]interface{}{"URL": url, "Timestamp": timestamp})
+		if err != nil {
+			result.Err = model.NewAppError("SqlLinkMetadataStore.Get", "store.sql_link_metadata.get.app_error", nil, "url="+url+", "+err.Error(), http.StatusInternalServerError)
+
+			if err == sql.ErrNoRows {
+				result.Err.StatusCode = http.StatusNotFound
+			}
+
+			return
+		}
+
+		err = metadata.DeserializeDataToConcreteType()
+		if err != nil {
+			result.Err = model.NewAppError("SqlLinkMetadataStore.Get", "store.sql_link_metadata.get.app_error", nil, "url="+url+", "+err.Error(), http.StatusInternalServerError)
+
+			return
+		}
+
+		result.Data = metadata
+	})
+}

store/sqlstore/link_metadata_store_test.go

@@ -0,0 +1,14 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package sqlstore
+
+import (
+	"testing"
+
+	"github.com/mattermost/mattermost-server/store/storetest"
+)
+
+func TestLinkMetadataStore(t *testing.T) {
+	StoreTest(t, storetest.TestLinkMetadataStore)
+}

store/sqlstore/store.go

@@ -96,4 +96,5 @@ type SqlStore interface {
 	Scheme() store.SchemeStore
 	TermsOfService() store.TermsOfServiceStore
 	UserTermsOfService() store.UserTermsOfServiceStore
+	LinkMetadata() store.LinkMetadataStore
 }

store/sqlstore/supplier.go

@@ -15,6 +15,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/dyatlov/go-opengraph/opengraph"
 	"github.com/go-sql-driver/mysql"
 	"github.com/lib/pq"
 	"github.com/mattermost/gorp"
@@ -95,6 +96,7 @@ type SqlSupplierOldStores struct {
 	TermsOfService       store.TermsOfServiceStore
 	group                store.GroupStore
 	UserTermsOfService   store.UserTermsOfServiceStore
+	linkMetadata         store.LinkMetadataStore
 }
 
 type SqlSupplier struct {
@@ -145,6 +147,7 @@ func NewSqlSupplier(settings model.SqlSettings, metrics einterfaces.MetricsInter
 	supplier.oldStores.plugin = NewSqlPluginStore(supplier)
 	supplier.oldStores.TermsOfService = NewSqlTermsOfServiceStore(supplier, metrics)
 	supplier.oldStores.UserTermsOfService = NewSqlUserTermsOfServiceStore(supplier)
+	supplier.oldStores.linkMetadata = NewSqlLinkMetadataStore(supplier)
 
 	initSqlSupplierReactions(supplier)
 	initSqlSupplierRoles(supplier)
@@ -183,6 +186,7 @@ func NewSqlSupplier(settings model.SqlSettings, metrics einterfaces.MetricsInter
 	supplier.oldStores.plugin.(*SqlPluginStore).CreateIndexesIfNotExists()
 	supplier.oldStores.TermsOfService.(SqlTermsOfServiceStore).CreateIndexesIfNotExists()
 	supplier.oldStores.UserTermsOfService.(SqlUserTermsOfServiceStore).CreateIndexesIfNotExists()
+	supplier.oldStores.linkMetadata.(*SqlLinkMetadataStore).CreateIndexesIfNotExists()
 
 	supplier.CreateIndexesIfNotExistsGroups()
 
@@ -1032,6 +1036,10 @@ func (ss *SqlSupplier) Group() store.GroupStore {
 	return ss.oldStores.group
 }
 
+func (ss *SqlSupplier) LinkMetadata() store.LinkMetadataStore {
+	return ss.oldStores.linkMetadata
+}
+
 func (ss *SqlSupplier) DropAllTables() {
 	ss.master.TruncateTables()
 }
@@ -1051,6 +1059,10 @@ func (me mattermConverter) ToDb(val interface{}) (interface{}, error) {
 		return model.StringInterfaceToJson(t), nil
 	case map[string]interface{}:
 		return model.StringInterfaceToJson(model.StringInterface(t)), nil
+	case JSONSerializable:
+		return t.ToJson(), nil
+	case *opengraph.OpenGraph:
+		return json.Marshal(t)
 	}
 
 	return val, nil
@@ -1113,6 +1125,10 @@ func (me mattermConverter) FromDb(target interface{}) (gorp.CustomScanner, bool)
 	return gorp.CustomScanner{}, false
 }
 
+type JSONSerializable interface {
+	ToJson() string
+}
+
 func convertMySQLFullTextColumnsToPostgres(columnNames string) string {
 	columns := strings.Split(columnNames, ", ")
 	concatenatedColumnNames := ""

store/store.go

@@ -68,6 +68,7 @@ type Store interface {
 	TermsOfService() TermsOfServiceStore
 	Group() GroupStore
 	UserTermsOfService() UserTermsOfServiceStore
+	LinkMetadata() LinkMetadataStore
 	MarkSystemRanUnitTests()
 	Close()
 	LockToMaster()
@@ -563,3 +564,8 @@ type GroupStore interface {
 	PendingAutoAddTeamMembers(minGroupMembersCreateAt int64) StoreChannel
 	PendingAutoAddChannelMembers(minGroupMembersCreateAt int64) StoreChannel
 }
+
+type LinkMetadataStore interface {
+	Save(linkMetadata *model.LinkMetadata) StoreChannel
+	Get(url string, timestamp int64) StoreChannel
+}

store/storetest/link_metadata_store.go

@@ -0,0 +1,251 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package storetest
+
+import (
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/dyatlov/go-opengraph/opengraph"
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/store"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// These tests are ran on the same store instance, so this provides easier unique, valid timestamps
+var linkMetadataTimestamp int64 = 1546300800000
+
+func getNextLinkMetadataTimestamp() int64 {
+	linkMetadataTimestamp += int64(time.Hour) / 1000
+	return linkMetadataTimestamp
+}
+
+func TestLinkMetadataStore(t *testing.T, ss store.Store) {
+	t.Run("Save", func(t *testing.T) { testLinkMetadataStoreSave(t, ss) })
+	t.Run("Get", func(t *testing.T) { testLinkMetadataStoreGet(t, ss) })
+	t.Run("Types", func(t *testing.T) { testLinkMetadataStoreTypes(t, ss) })
+}
+
+func testLinkMetadataStoreSave(t *testing.T, ss store.Store) {
+	t.Run("should save item", func(t *testing.T) {
+		metadata := &model.LinkMetadata{
+			URL:       "http://example.com",
+			Timestamp: getNextLinkMetadataTimestamp(),
+			Type:      model.LINK_METADATA_TYPE_IMAGE,
+			Data:      &model.PostImage{},
+		}
+
+		result := <-ss.LinkMetadata().Save(metadata)
+
+		require.Nil(t, result.Err)
+		require.IsType(t, metadata, result.Data)
+		assert.Equal(t, *metadata, *result.Data.(*model.LinkMetadata))
+	})
+
+	t.Run("should fail to save invalid item", func(t *testing.T) {
+		metadata := &model.LinkMetadata{
+			URL:       "",
+			Timestamp: 0,
+			Type:      "garbage",
+			Data:      nil,
+		}
+
+		result := <-ss.LinkMetadata().Save(metadata)
+
+		assert.NotNil(t, result.Err)
+	})
+
+	t.Run("should save with duplicate URL and different timestamp", func(t *testing.T) {
+		metadata := &model.LinkMetadata{
+			URL:       "http://example.com",
+			Timestamp: getNextLinkMetadataTimestamp(),
+			Type:      model.LINK_METADATA_TYPE_IMAGE,
+			Data:      &model.PostImage{},
+		}
+
+		result := <-ss.LinkMetadata().Save(metadata)
+		require.Nil(t, result.Err)
+
+		metadata.Timestamp = getNextLinkMetadataTimestamp()
+
+		result = <-ss.LinkMetadata().Save(metadata)
+
+		require.Nil(t, result.Err)
+		require.IsType(t, metadata, result.Data)
+		assert.Equal(t, *metadata, *result.Data.(*model.LinkMetadata))
+	})
+
+	t.Run("should save with duplicate timestamp and different URL", func(t *testing.T) {
+		metadata := &model.LinkMetadata{
+			URL:       "http://example.com",
+			Timestamp: getNextLinkMetadataTimestamp(),
+			Type:      model.LINK_METADATA_TYPE_IMAGE,
+			Data:      &model.PostImage{},
+		}
+
+		result := <-ss.LinkMetadata().Save(metadata)
+		require.Nil(t, result.Err)
+
+		metadata.URL = "http://example.com/another/page"
+
+		result = <-ss.LinkMetadata().Save(metadata)
+
+		require.Nil(t, result.Err)
+		require.IsType(t, metadata, result.Data)
+		assert.Equal(t, *metadata, *result.Data.(*model.LinkMetadata))
+	})
+
+	t.Run("should fail to save with duplicate URL and timestamp", func(t *testing.T) {
+		metadata := &model.LinkMetadata{
+			URL:       "http://example.com",
+			Timestamp: getNextLinkMetadataTimestamp(),
+			Type:      model.LINK_METADATA_TYPE_IMAGE,
+			Data:      &model.PostImage{},
+		}
+
+		result := <-ss.LinkMetadata().Save(metadata)
+		require.Nil(t, result.Err)
+
+		result = <-ss.LinkMetadata().Save(metadata)
+
+		assert.NotNil(t, result.Err)
+	})
+}
+
+func testLinkMetadataStoreGet(t *testing.T, ss store.Store) {
+	t.Run("should get value", func(t *testing.T) {
+		metadata := &model.LinkMetadata{
+			URL:       "http://example.com",
+			Timestamp: getNextLinkMetadataTimestamp(),
+			Type:      model.LINK_METADATA_TYPE_IMAGE,
+			Data:      &model.PostImage{},
+		}
+
+		result := <-ss.LinkMetadata().Save(metadata)
+		require.Nil(t, result.Err)
+
+		result = <-ss.LinkMetadata().Get(metadata.URL, metadata.Timestamp)
+
+		require.Nil(t, result.Err)
+		require.IsType(t, metadata, result.Data)
+		assert.Equal(t, *metadata, *result.Data.(*model.LinkMetadata))
+	})
+
+	t.Run("should return not found with incorrect URL", func(t *testing.T) {
+		metadata := &model.LinkMetadata{
+			URL:       "http://example.com",
+			Timestamp: getNextLinkMetadataTimestamp(),
+			Type:      model.LINK_METADATA_TYPE_IMAGE,
+			Data:      &model.PostImage{},
+		}
+
+		result := <-ss.LinkMetadata().Save(metadata)
+		require.Nil(t, result.Err)
+
+		result = <-ss.LinkMetadata().Get("http://example.com/another_page", metadata.Timestamp)
+
+		require.NotNil(t, result.Err)
+		assert.Equal(t, http.StatusNotFound, result.Err.StatusCode)
+	})
+
+	t.Run("should return not found with incorrect timestamp", func(t *testing.T) {
+		metadata := &model.LinkMetadata{
+			URL:       "http://example.com",
+			Timestamp: getNextLinkMetadataTimestamp(),
+			Type:      model.LINK_METADATA_TYPE_IMAGE,
+			Data:      &model.PostImage{},
+		}
+
+		result := <-ss.LinkMetadata().Save(metadata)
+		require.Nil(t, result.Err)
+
+		result = <-ss.LinkMetadata().Get(metadata.URL, getNextLinkMetadataTimestamp())
+
+		require.NotNil(t, result.Err)
+		assert.Equal(t, http.StatusNotFound, result.Err.StatusCode)
+	})
+}
+
+func testLinkMetadataStoreTypes(t *testing.T, ss store.Store) {
+	t.Run("should save and get image metadata", func(t *testing.T) {
+		metadata := &model.LinkMetadata{
+			URL:       "http://example.com",
+			Timestamp: getNextLinkMetadataTimestamp(),
+			Type:      model.LINK_METADATA_TYPE_IMAGE,
+			Data: &model.PostImage{
+				Width:  123,
+				Height: 456,
+			},
+		}
+
+		result := <-ss.LinkMetadata().Save(metadata)
+		require.Nil(t, result.Err)
+
+		received := result.Data.(*model.LinkMetadata)
+		require.IsType(t, &model.PostImage{}, received.Data)
+		assert.Equal(t, *(metadata.Data.(*model.PostImage)), *(received.Data.(*model.PostImage)))
+
+		result = <-ss.LinkMetadata().Get(metadata.URL, metadata.Timestamp)
+		require.Nil(t, result.Err)
+
+		received = result.Data.(*model.LinkMetadata)
+		require.IsType(t, &model.PostImage{}, received.Data)
+		assert.Equal(t, *(metadata.Data.(*model.PostImage)), *(received.Data.(*model.PostImage)))
+	})
+
+	t.Run("should save and get opengraph data", func(t *testing.T) {
+		og := &opengraph.OpenGraph{
+			URL: "http://example.com",
+			Images: []*opengraph.Image{
+				{
+					URL: "http://example.com/image.png",
+				},
+			},
+		}
+
+		metadata := &model.LinkMetadata{
+			URL:       "http://example.com",
+			Timestamp: getNextLinkMetadataTimestamp(),
+			Type:      model.LINK_METADATA_TYPE_OPENGRAPH,
+			Data:      og,
+		}
+
+		result := <-ss.LinkMetadata().Save(metadata)
+		require.Nil(t, result.Err)
+
+		received := result.Data.(*model.LinkMetadata)
+		require.IsType(t, &opengraph.OpenGraph{}, received.Data)
+		assert.Equal(t, *(metadata.Data.(*opengraph.OpenGraph)), *(received.Data.(*opengraph.OpenGraph)))
+
+		result = <-ss.LinkMetadata().Get(metadata.URL, metadata.Timestamp)
+		require.Nil(t, result.Err)
+
+		received = result.Data.(*model.LinkMetadata)
+		require.IsType(t, &opengraph.OpenGraph{}, received.Data)
+		assert.Equal(t, *(metadata.Data.(*opengraph.OpenGraph)), *(received.Data.(*opengraph.OpenGraph)))
+	})
+
+	t.Run("should save and get nil", func(t *testing.T) {
+		metadata := &model.LinkMetadata{
+			URL:       "http://example.com",
+			Timestamp: getNextLinkMetadataTimestamp(),
+			Type:      model.LINK_METADATA_TYPE_NONE,
+			Data:      nil,
+		}
+
+		result := <-ss.LinkMetadata().Save(metadata)
+		require.Nil(t, result.Err)
+
+		received := result.Data.(*model.LinkMetadata)
+		assert.Nil(t, received.Data)
+
+		result = <-ss.LinkMetadata().Get(metadata.URL, metadata.Timestamp)
+		require.Nil(t, result.Err)
+
+		received = result.Data.(*model.LinkMetadata)
+		require.Nil(t, received.Data)
+	})
+}

store/storetest/mocks/LayeredStoreDatabaseLayer.go

@@ -584,6 +584,22 @@ func (_m *LayeredStoreDatabaseLayer) License() store.LicenseStore {
 	return r0
 }
 
+// LinkMetadata provides a mock function with given fields:
+func (_m *LayeredStoreDatabaseLayer) LinkMetadata() store.LinkMetadataStore {
+	ret := _m.Called()
+
+	var r0 store.LinkMetadataStore
+	if rf, ok := ret.Get(0).(func() store.LinkMetadataStore); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(store.LinkMetadataStore)
+		}
+	}
+
+	return r0
+}
+
 // LockToMaster provides a mock function with given fields:
 func (_m *LayeredStoreDatabaseLayer) LockToMaster() {
 	_m.Called()

store/storetest/mocks/LinkMetadataStore.go

@@ -0,0 +1,46 @@
+// Code generated by mockery v1.0.0. DO NOT EDIT.
+
+// Regenerate this file using `make store-mocks`.
+
+package mocks
+
+import mock "github.com/stretchr/testify/mock"
+import model "github.com/mattermost/mattermost-server/model"
+import store "github.com/mattermost/mattermost-server/store"
+
+// LinkMetadataStore is an autogenerated mock type for the LinkMetadataStore type
+type LinkMetadataStore struct {
+	mock.Mock
+}
+
+// Get provides a mock function with given fields: url, timestamp
+func (_m *LinkMetadataStore) Get(url string, timestamp int64) store.StoreChannel {
+	ret := _m.Called(url, timestamp)
+
+	var r0 store.StoreChannel
+	if rf, ok := ret.Get(0).(func(string, int64) store.StoreChannel); ok {
+		r0 = rf(url, timestamp)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(store.StoreChannel)
+		}
+	}
+
+	return r0
+}
+
+// Save provides a mock function with given fields: linkMetadata
+func (_m *LinkMetadataStore) Save(linkMetadata *model.LinkMetadata) store.StoreChannel {
+	ret := _m.Called(linkMetadata)
+
+	var r0 store.StoreChannel
+	if rf, ok := ret.Get(0).(func(*model.LinkMetadata) store.StoreChannel); ok {
+		r0 = rf(linkMetadata)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(store.StoreChannel)
+		}
+	}
+
+	return r0
+}

store/storetest/mocks/ObjectCache.go

@@ -0,0 +1,97 @@
+// Code generated by mockery v1.0.0. DO NOT EDIT.
+
+// Regenerate this file using `make store-mocks`.
+
+package mocks
+
+import mock "github.com/stretchr/testify/mock"
+
+// ObjectCache is an autogenerated mock type for the ObjectCache type
+type ObjectCache struct {
+	mock.Mock
+}
+
+// AddWithDefaultExpires provides a mock function with given fields: key, value
+func (_m *ObjectCache) AddWithDefaultExpires(key interface{}, value interface{}) {
+	_m.Called(key, value)
+}
+
+// AddWithExpiresInSecs provides a mock function with given fields: key, value, expireAtSecs
+func (_m *ObjectCache) AddWithExpiresInSecs(key interface{}, value interface{}, expireAtSecs int64) {
+	_m.Called(key, value, expireAtSecs)
+}
+
+// Get provides a mock function with given fields: key
+func (_m *ObjectCache) Get(key interface{}) (interface{}, bool) {
+	ret := _m.Called(key)
+
+	var r0 interface{}
+	if rf, ok := ret.Get(0).(func(interface{}) interface{}); ok {
+		r0 = rf(key)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(interface{})
+		}
+	}
+
+	var r1 bool
+	if rf, ok := ret.Get(1).(func(interface{}) bool); ok {
+		r1 = rf(key)
+	} else {
+		r1 = ret.Get(1).(bool)
+	}
+
+	return r0, r1
+}
+
+// GetInvalidateClusterEvent provides a mock function with given fields:
+func (_m *ObjectCache) GetInvalidateClusterEvent() string {
+	ret := _m.Called()
+
+	var r0 string
+	if rf, ok := ret.Get(0).(func() string); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(string)
+	}
+
+	return r0
+}
+
+// Len provides a mock function with given fields:
+func (_m *ObjectCache) Len() int {
+	ret := _m.Called()
+
+	var r0 int
+	if rf, ok := ret.Get(0).(func() int); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(int)
+	}
+
+	return r0
+}
+
+// Name provides a mock function with given fields:
+func (_m *ObjectCache) Name() string {
+	ret := _m.Called()
+
+	var r0 string
+	if rf, ok := ret.Get(0).(func() string); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(string)
+	}
+
+	return r0
+}
+
+// Purge provides a mock function with given fields:
+func (_m *ObjectCache) Purge() {
+	_m.Called()
+}
+
+// Remove provides a mock function with given fields: key
+func (_m *ObjectCache) Remove(key interface{}) {
+	_m.Called(key)
+}

store/storetest/mocks/SqlStore.go

@@ -439,6 +439,22 @@ func (_m *SqlStore) License() store.LicenseStore {
 	return r0
 }
 
+// LinkMetadata provides a mock function with given fields:
+func (_m *SqlStore) LinkMetadata() store.LinkMetadataStore {
+	ret := _m.Called()
+
+	var r0 store.LinkMetadataStore
+	if rf, ok := ret.Get(0).(func() store.LinkMetadataStore); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(store.LinkMetadataStore)
+		}
+	}
+
+	return r0
+}
+
 // LockToMaster provides a mock function with given fields:
 func (_m *SqlStore) LockToMaster() {
 	_m.Called()

store/storetest/mocks/Store.go

@@ -214,6 +214,22 @@ func (_m *Store) License() store.LicenseStore {
 	return r0
 }
 
+// LinkMetadata provides a mock function with given fields:
+func (_m *Store) LinkMetadata() store.LinkMetadataStore {
+	ret := _m.Called()
+
+	var r0 store.LinkMetadataStore
+	if rf, ok := ret.Get(0).(func() store.LinkMetadataStore); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(store.LinkMetadataStore)
+		}
+	}
+
+	return r0
+}
+
 // LockToMaster provides a mock function with given fields:
 func (_m *Store) LockToMaster() {
 	_m.Called()

store/storetest/store.go

@@ -48,6 +48,7 @@ type Store struct {
 	TermsOfServiceStore       mocks.TermsOfServiceStore
 	GroupStore                mocks.GroupStore
 	UserTermsOfServiceStore   mocks.UserTermsOfServiceStore
+	LinkMetadataStore         mocks.LinkMetadataStore
 }
 
 func (s *Store) Team() store.TeamStore                             { return &s.TeamStore }
@@ -80,15 +81,16 @@ func (s *Store) UserTermsOfService() store.UserTermsOfServiceStore { return &s.U
 func (s *Store) ChannelMemberHistory() store.ChannelMemberHistoryStore {
 	return &s.ChannelMemberHistoryStore
 }
-func (s *Store) Group() store.GroupStore       { return &s.GroupStore }
-func (s *Store) MarkSystemRanUnitTests()       { /* do nothing */ }
-func (s *Store) Close()                        { /* do nothing */ }
-func (s *Store) LockToMaster()                 { /* do nothing */ }
-func (s *Store) UnlockFromMaster()             { /* do nothing */ }
-func (s *Store) DropAllTables()                { /* do nothing */ }
-func (s *Store) TotalMasterDbConnections() int { return 1 }
-func (s *Store) TotalReadDbConnections() int   { return 1 }
-func (s *Store) TotalSearchDbConnections() int { return 1 }
+func (s *Store) Group() store.GroupStore               { return &s.GroupStore }
+func (s *Store) LinkMetadata() store.LinkMetadataStore { return &s.LinkMetadataStore }
+func (s *Store) MarkSystemRanUnitTests()               { /* do nothing */ }
+func (s *Store) Close()                                { /* do nothing */ }
+func (s *Store) LockToMaster()                         { /* do nothing */ }
+func (s *Store) UnlockFromMaster()                     { /* do nothing */ }
+func (s *Store) DropAllTables()                        { /* do nothing */ }
+func (s *Store) TotalMasterDbConnections() int         { return 1 }
+func (s *Store) TotalReadDbConnections() int           { return 1 }
+func (s *Store) TotalSearchDbConnections() int         { return 1 }
 
 func (s *Store) AssertExpectations(t mock.TestingT) bool {
 	return mock.AssertExpectationsForObjects(t,