Pr 9039 (#9187)

* MM-11065: Allow to search and get archived channels from the API

* Fixing more tests

* Add some unit tests

* Add includeDeleted parameter to session permissions check function

* More test fixing

* Adding archive channels list in channels search

* Add restriction for archived channel edition

* Reverting permissions checks modification

* Changed the query parameter to include_deleted

* Enable search archive channels as true by default

* Adding tests for verify search on deleted channels

* Allowing to override archive channels during the imports

* Fixed test

* Search in archive channels from the API must be explicitly requested

* Removing includeDeleted parameter from GetChannelByName and GetChannelByNameForTeam

* Back to ViewArchivedChannels config

* Fixing tests

* Reverting GetChannelByName parameter

* Add include deleted parameter on GetChannel functions in plugins api

* Fixing tests

6 files changed, 51 insertions, 11 deletions

diff --git a/api4/apitestlib.go b/api4/apitestlib.go
index fce44cfa1..652a8f882 100644
--- a/api4/apitestlib.go
+++ b/api4/apitestlib.go
@@ -44,6 +44,7 @@ type TestHelper struct {
 	BasicTeam           *model.Team
 	BasicChannel        *model.Channel
 	BasicPrivateChannel *model.Channel
+	BasicDeletedChannel *model.Channel
 	BasicChannel2       *model.Channel
 	BasicPost           *model.Post
 
@@ -250,6 +251,7 @@ func (me *TestHelper) InitBasic() *TestHelper {
 	me.BasicTeam = me.CreateTeam()
 	me.BasicChannel = me.CreatePublicChannel()
 	me.BasicPrivateChannel = me.CreatePrivateChannel()
+	me.BasicDeletedChannel = me.CreatePublicChannel()
 	me.BasicChannel2 = me.CreatePublicChannel()
 	me.BasicPost = me.CreatePost()
 	me.BasicUser = me.CreateUser()
@@ -262,7 +264,10 @@ func (me *TestHelper) InitBasic() *TestHelper {
 	me.App.AddUserToChannel(me.BasicUser2, me.BasicChannel2)
 	me.App.AddUserToChannel(me.BasicUser, me.BasicPrivateChannel)
 	me.App.AddUserToChannel(me.BasicUser2, me.BasicPrivateChannel)
+	me.App.AddUserToChannel(me.BasicUser, me.BasicDeletedChannel)
+	me.App.AddUserToChannel(me.BasicUser2, me.BasicDeletedChannel)
 	me.App.UpdateUserRoles(me.BasicUser.Id, model.SYSTEM_USER_ROLE_ID, false)
+	me.Client.DeleteChannel(me.BasicDeletedChannel.Id)
 	me.LoginBasic()
 
 	return me
diff --git a/api4/channel.go b/api4/channel.go
index db34bf03c..0b8470975 100644
--- a/api4/channel.go
+++ b/api4/channel.go
@@ -589,7 +589,7 @@ func getChannelsForTeamForUser(c *Context, w http.ResponseWriter, r *http.Reques
 		return
 	}
 
-	channels, err := c.App.GetChannelsForUser(c.Params.TeamId, c.Params.UserId)
+	channels, err := c.App.GetChannelsForUser(c.Params.TeamId, c.Params.UserId, false)
 	if err != nil {
 		c.Err = err
 		return
@@ -709,7 +709,9 @@ func getChannelByName(c *Context, w http.ResponseWriter, r *http.Request) {
 	var channel *model.Channel
 	var err *model.AppError
 
-	if channel, err = c.App.GetChannelByName(c.Params.ChannelName, c.Params.TeamId); err != nil {
+	includeDeleted := r.URL.Query().Get("include_deleted") == "true"
+
+	if channel, err = c.App.GetChannelByName(c.Params.ChannelName, c.Params.TeamId, includeDeleted); err != nil {
 		c.Err = err
 		return
 	}
@@ -744,7 +746,9 @@ func getChannelByNameForTeamName(c *Context, w http.ResponseWriter, r *http.Requ
 	var channel *model.Channel
 	var err *model.AppError
 
-	if channel, err = c.App.GetChannelByNameForTeamName(c.Params.ChannelName, c.Params.TeamName); err != nil {
+	includeDeleted := r.URL.Query().Get("include_deleted") == "true"
+
+	if channel, err = c.App.GetChannelByNameForTeamName(c.Params.ChannelName, c.Params.TeamName, includeDeleted); err != nil {
 		c.Err = err
 		return
 	}
diff --git a/api4/channel_test.go b/api4/channel_test.go
index 0d8fbe4d5..4645a0ab6 100644
--- a/api4/channel_test.go
+++ b/api4/channel_test.go
@@ -867,7 +867,7 @@ func TestDeleteChannel(t *testing.T) {
 	CheckNoError(t, resp)
 
 	// default channel cannot be deleted.
-	defaultChannel, _ := th.App.GetChannelByName(model.DEFAULT_CHANNEL, team.Id)
+	defaultChannel, _ := th.App.GetChannelByName(model.DEFAULT_CHANNEL, team.Id, false)
 	pass, resp = Client.DeleteChannel(defaultChannel.Id)
 	CheckBadRequestStatus(t, resp)
 
@@ -998,7 +998,7 @@ func TestConvertChannelToPrivate(t *testing.T) {
 	defer th.TearDown()
 	Client := th.Client
 
-	defaultChannel, _ := th.App.GetChannelByName(model.DEFAULT_CHANNEL, th.BasicTeam.Id)
+	defaultChannel, _ := th.App.GetChannelByName(model.DEFAULT_CHANNEL, th.BasicTeam.Id, false)
 	_, resp := Client.ConvertChannelToPrivate(defaultChannel.Id)
 	CheckForbiddenStatus(t, resp)
 
@@ -1115,6 +1115,16 @@ func TestGetChannelByName(t *testing.T) {
 	_, resp = Client.GetChannelByName(strings.ToUpper(th.BasicPrivateChannel.Name), th.BasicTeam.Id, "")
 	CheckNoError(t, resp)
 
+	_, resp = Client.GetChannelByName(th.BasicDeletedChannel.Name, th.BasicTeam.Id, "")
+	CheckNotFoundStatus(t, resp)
+
+	channel, resp = Client.GetChannelByNameIncludeDeleted(th.BasicDeletedChannel.Name, th.BasicTeam.Id, "")
+	CheckNoError(t, resp)
+
+	if channel.Name != th.BasicDeletedChannel.Name {
+		t.Fatal("names did not match")
+	}
+
 	Client.RemoveUserFromChannel(th.BasicChannel.Id, th.BasicUser.Id)
 	_, resp = Client.GetChannelByName(th.BasicChannel.Name, th.BasicTeam.Id, "")
 	CheckNoError(t, resp)
@@ -1157,6 +1167,16 @@ func TestGetChannelByNameForTeamName(t *testing.T) {
 	_, resp = Client.GetChannelByNameForTeamName(th.BasicChannel.Name, th.BasicTeam.Name, "")
 	CheckNoError(t, resp)
 
+	_, resp = Client.GetChannelByNameForTeamName(th.BasicDeletedChannel.Name, th.BasicTeam.Name, "")
+	CheckNotFoundStatus(t, resp)
+
+	channel, resp = Client.GetChannelByNameForTeamNameIncludeDeleted(th.BasicDeletedChannel.Name, th.BasicTeam.Name, "")
+	CheckNoError(t, resp)
+
+	if channel.Name != th.BasicDeletedChannel.Name {
+		t.Fatal("names did not match")
+	}
+
 	_, resp = Client.GetChannelByNameForTeamName(th.BasicChannel.Name, model.NewRandomString(15), "")
 	CheckNotFoundStatus(t, resp)
 
@@ -1330,8 +1350,8 @@ func TestGetChannelMembersForUser(t *testing.T) {
 	members, resp := Client.GetChannelMembersForUser(th.BasicUser.Id, th.BasicTeam.Id, "")
 	CheckNoError(t, resp)
 
-	if len(*members) != 5 {
-		t.Fatal("should have 5 members on team")
+	if len(*members) != 6 {
+		t.Fatal("should have 6 members on team")
 	}
 
 	_, resp = Client.GetChannelMembersForUser("", th.BasicTeam.Id, "")
diff --git a/api4/post.go b/api4/post.go
index b76e89964..12664cc24 100644
--- a/api4/post.go
+++ b/api4/post.go
@@ -330,6 +330,8 @@ func searchPosts(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	includeDeletedChannels := r.URL.Query().Get("include_deleted_channels") == "true"
+
 	props := model.StringInterfaceFromJson(r.Body)
 	terms, ok := props["terms"].(string)
 	if !ok || len(terms) == 0 {
@@ -341,7 +343,7 @@ func searchPosts(c *Context, w http.ResponseWriter, r *http.Request) {
 
 	startTime := time.Now()
 
-	results, err := c.App.SearchPostsInTeam(terms, c.Session.UserId, c.Params.TeamId, isOrSearch)
+	results, err := c.App.SearchPostsInTeam(terms, c.Session.UserId, c.Params.TeamId, isOrSearch, includeDeletedChannels)
 
 	elapsedTime := float64(time.Since(startTime)) / float64(time.Second)
 	metrics := c.App.Metrics
diff --git a/api4/post_test.go b/api4/post_test.go
index 720fdc410..036a64fc7 100644
--- a/api4/post_test.go
+++ b/api4/post_test.go
@@ -1288,6 +1288,10 @@ func TestSearchPosts(t *testing.T) {
 	message = "hashtag for post4"
 	_ = th.CreateMessagePost(message)
 
+	archivedChannel := th.CreatePublicChannel()
+	_ = th.CreateMessagePostWithClient(th.Client, archivedChannel, "#hashtag for post3")
+	th.Client.DeleteChannel(archivedChannel.Id)
+
 	posts, resp := Client.SearchPosts(th.BasicTeam.Id, "search", false)
 	CheckNoError(t, resp)
 	if len(posts.Order) != 3 {
@@ -1306,6 +1310,12 @@ func TestSearchPosts(t *testing.T) {
 		t.Fatal("wrong search")
 	}
 
+	posts, resp = Client.SearchPostsIncludeDeletedChannels(th.BasicTeam.Id, "#hashtag", false)
+	CheckNoError(t, resp)
+	if len(posts.Order) != 2 {
+		t.Fatal("wrong search")
+	}
+
 	if posts, resp = Client.SearchPosts(th.BasicTeam.Id, "*", false); len(posts.Order) != 0 {
 		t.Fatal("searching for just * shouldn't return any results")
 	}
@@ -1328,7 +1338,6 @@ func TestSearchPosts(t *testing.T) {
 	Client.Logout()
 	_, resp = Client.SearchPosts(th.BasicTeam.Id, "#sgtitlereview", false)
 	CheckUnauthorizedStatus(t, resp)
-
 }
 
 func TestSearchHashtagPosts(t *testing.T) {
diff --git a/api4/reaction_test.go b/api4/reaction_test.go
index dda9a578a..ca2c49808 100644
--- a/api4/reaction_test.go
+++ b/api4/reaction_test.go
@@ -176,7 +176,7 @@ func TestSaveReaction(t *testing.T) {
 	t.Run("unable-to-react-in-read-only-town-square", func(t *testing.T) {
 		th.LoginBasic()
 
-		channel, err := th.App.GetChannelByName("town-square", th.BasicTeam.Id)
+		channel, err := th.App.GetChannelByName("town-square", th.BasicTeam.Id, true)
 		assert.Nil(t, err)
 		post := th.CreatePostWithClient(th.Client, channel)
 
@@ -482,7 +482,7 @@ func TestDeleteReaction(t *testing.T) {
 	t.Run("unable-to-delete-reactions-in-read-only-town-square", func(t *testing.T) {
 		th.LoginBasic()
 
-		channel, err := th.App.GetChannelByName("town-square", th.BasicTeam.Id)
+		channel, err := th.App.GetChannelByName("town-square", th.BasicTeam.Id, true)
 		assert.Nil(t, err)
 		post := th.CreatePostWithClient(th.Client, channel)