Make support packet composable with plugins (#26403)

---------

Co-authored-by: Ben Schumacher <ben.schumacher@mattermost.com>

server/public/plugin/client_rpc_generated.go

@@ -1125,6 +1125,42 @@ func (s *hooksRPCServer) OnSharedChannelsProfileImageSyncMsg(args *Z_OnSharedCha
 	return nil
 }
 
+func init() {
+	hookNameToId["GenerateSupportData"] = GenerateSupportDataID
+}
+
+type Z_GenerateSupportDataArgs struct {
+	A *Context
+}
+
+type Z_GenerateSupportDataReturns struct {
+	A []*model.FileData
+	B error
+}
+
+func (g *hooksRPCClient) GenerateSupportData(c *Context) ([]*model.FileData, error) {
+	_args := &Z_GenerateSupportDataArgs{c}
+	_returns := &Z_GenerateSupportDataReturns{}
+	if g.implemented[GenerateSupportDataID] {
+		if err := g.client.Call("Plugin.GenerateSupportData", _args, _returns); err != nil {
+			g.log.Error("RPC call GenerateSupportData to plugin failed.", mlog.Err(err))
+		}
+	}
+	return _returns.A, _returns.B
+}
+
+func (s *hooksRPCServer) GenerateSupportData(args *Z_GenerateSupportDataArgs, returns *Z_GenerateSupportDataReturns) error {
+	if hook, ok := s.impl.(interface {
+		GenerateSupportData(c *Context) ([]*model.FileData, error)
+	}); ok {
+		returns.A, returns.B = hook.GenerateSupportData(args.A)
+		returns.B = encodableError(returns.B)
+	} else {
+		return encodableError(fmt.Errorf("Hook GenerateSupportData called but not implemented."))
+	}
+	return nil
+}
+
 type Z_RegisterCommandArgs struct {
 	A *model.Command
 }

server/public/plugin/hooks.go

@@ -60,6 +60,7 @@ const (
 	PreferencesHaveChangedID                  = 42
 	OnSharedChannelsAttachmentSyncMsgID       = 43
 	OnSharedChannelsProfileImageSyncMsgID     = 44
+	GenerateSupportDataID                     = 45
 	TotalHooksID                              = iota
 )
 
@@ -382,4 +383,10 @@ type Hooks interface {
 	//
 	// Minimum server version: 9.5
 	OnSharedChannelsProfileImageSyncMsg(user *model.User, rc *model.RemoteCluster) error
+
+	// GenerateSupportData is invoked when a Support Packet gets generated.
+	// It allows plugins to include their own content in the Support Packet.
+	//
+	// Minimum server version: 9.8
+	GenerateSupportData(c *Context) ([]*model.FileData, error)
 }

server/public/plugin/hooks_timer_layer_generated.go

@@ -284,3 +284,10 @@ func (hooks *hooksTimerLayer) OnSharedChannelsProfileImageSyncMsg(user *model.Us
 	hooks.recordTime(startTime, "OnSharedChannelsProfileImageSyncMsg", _returnsA == nil)
 	return _returnsA
 }
+
+func (hooks *hooksTimerLayer) GenerateSupportData(c *Context) ([]*model.FileData, error) {
+	startTime := timePkg.Now()
+	_returnsA, _returnsB := hooks.hooksImpl.GenerateSupportData(c)
+	hooks.recordTime(startTime, "GenerateSupportData", _returnsB == nil)
+	return _returnsA, _returnsB
+}

server/public/plugin/plugintest/hooks.go

@@ -105,6 +105,32 @@ func (_m *Hooks) FileWillBeUploaded(c *plugin.Context, info *model.FileInfo, fil
 	return r0, r1
 }
 
+// GenerateSupportData provides a mock function with given fields: c
+func (_m *Hooks) GenerateSupportData(c *plugin.Context) ([]*model.FileData, error) {
+	ret := _m.Called(c)
+
+	var r0 []*model.FileData
+	var r1 error
+	if rf, ok := ret.Get(0).(func(*plugin.Context) ([]*model.FileData, error)); ok {
+		return rf(c)
+	}
+	if rf, ok := ret.Get(0).(func(*plugin.Context) []*model.FileData); ok {
+		r0 = rf(c)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*model.FileData)
+		}
+	}
+
+	if rf, ok := ret.Get(1).(func(*plugin.Context) error); ok {
+		r1 = rf(c)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // Implemented provides a mock function with given fields:
 func (_m *Hooks) Implemented() ([]string, error) {
 	ret := _m.Called()