dataplaneapi/handlers/filter.go

// Copyright 2019 HAProxy Technologies
//
// 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 handlers

import (
	"github.com/go-openapi/runtime/middleware"
	client_native "github.com/haproxytech/client-native/v6"
	"github.com/haproxytech/client-native/v6/models"

	"github.com/haproxytech/dataplaneapi/haproxy"
	"github.com/haproxytech/dataplaneapi/misc"
	"github.com/haproxytech/dataplaneapi/operations/filter"
)

// CreateFilterHandlerImpl implementation of the CreateFilterHandler interface using client-native client
type CreateFilterHandlerImpl struct {
	Client      client_native.HAProxyClient
	ReloadAgent haproxy.IReloadAgent
}

// DeleteFilterHandlerImpl implementation of the DeleteFilterHandler interface using client-native client
type DeleteFilterHandlerImpl struct {
	Client      client_native.HAProxyClient
	ReloadAgent haproxy.IReloadAgent
}

// GetFilterHandlerImpl implementation of the GetFilterHandler interface using client-native client
type GetFilterHandlerImpl struct {
	Client client_native.HAProxyClient
}

// GetFiltersHandlerImpl implementation of the GetFiltersHandler interface using client-native client
type GetFiltersHandlerImpl struct {
	Client client_native.HAProxyClient
}

// ReplaceFilterHandlerImpl implementation of the ReplaceFilterHandler interface using client-native client
type ReplaceFilterHandlerImpl struct {
	Client      client_native.HAProxyClient
	ReloadAgent haproxy.IReloadAgent
}

// Handle executing the request and returning a response
func (h *CreateFilterHandlerImpl) Handle(params filter.CreateFilterParams, principal interface{}) middleware.Responder {
	t := ""
	v := int64(0)
	if params.TransactionID != nil {
		t = *params.TransactionID
	}
	if params.Version != nil {
		v = *params.Version
	}

	if t != "" && *params.ForceReload {
		msg := "Both force_reload and transaction specified, specify only one"
		c := misc.ErrHTTPBadRequest
		e := &models.Error{
			Message: &msg,
			Code:    &c,
		}
		return filter.NewCreateFilterDefault(int(*e.Code)).WithPayload(e)
	}

	configuration, err := h.Client.Configuration()
	if err != nil {
		e := misc.HandleError(err)
		return filter.NewCreateFilterDefault(int(*e.Code)).WithPayload(e)
	}

	err = configuration.CreateFilter(params.ParentType, params.ParentName, params.Data, t, v)
	if err != nil {
		e := misc.HandleError(err)
		return filter.NewCreateFilterDefault(int(*e.Code)).WithPayload(e)
	}
	if params.TransactionID == nil {
		if *params.ForceReload {
			err := h.ReloadAgent.ForceReload()
			if err != nil {
				e := misc.HandleError(err)
				return filter.NewCreateFilterDefault(int(*e.Code)).WithPayload(e)
			}
			return filter.NewCreateFilterCreated().WithPayload(params.Data)
		}
		rID := h.ReloadAgent.Reload()
		return filter.NewCreateFilterAccepted().WithReloadID(rID).WithPayload(params.Data)
	}
	return filter.NewCreateFilterAccepted().WithPayload(params.Data)
}

// Handle executing the request and returning a response
func (h *DeleteFilterHandlerImpl) Handle(params filter.DeleteFilterParams, principal interface{}) middleware.Responder {
	t := ""
	v := int64(0)
	if params.TransactionID != nil {
		t = *params.TransactionID
	}
	if params.Version != nil {
		v = *params.Version
	}

	if t != "" && *params.ForceReload {
		msg := "Both force_reload and transaction specified, specify only one"
		c := misc.ErrHTTPBadRequest
		e := &models.Error{
			Message: &msg,
			Code:    &c,
		}
		return filter.NewDeleteFilterDefault(int(*e.Code)).WithPayload(e)
	}

	configuration, err := h.Client.Configuration()
	if err != nil {
		e := misc.HandleError(err)
		return filter.NewDeleteFilterDefault(int(*e.Code)).WithPayload(e)
	}

	err = configuration.DeleteFilter(params.Index, params.ParentType, params.ParentName, t, v)
	if err != nil {
		e := misc.HandleError(err)
		return filter.NewDeleteFilterDefault(int(*e.Code)).WithPayload(e)
	}
	if params.TransactionID == nil {
		if *params.ForceReload {
			err := h.ReloadAgent.ForceReload()
			if err != nil {
				e := misc.HandleError(err)
				return filter.NewDeleteFilterDefault(int(*e.Code)).WithPayload(e)
			}
			return filter.NewDeleteFilterNoContent()
		}
		rID := h.ReloadAgent.Reload()
		return filter.NewDeleteFilterAccepted().WithReloadID(rID)
	}
	return filter.NewDeleteFilterAccepted()
}

// Handle executing the request and returning a response
func (h *GetFilterHandlerImpl) Handle(params filter.GetFilterParams, principal interface{}) middleware.Responder {
	t := ""
	if params.TransactionID != nil {
		t = *params.TransactionID
	}

	configuration, err := h.Client.Configuration()
	if err != nil {
		e := misc.HandleError(err)
		return filter.NewGetFilterDefault(int(*e.Code)).WithPayload(e)
	}

	v, f, err := configuration.GetFilter(params.Index, params.ParentType, params.ParentName, t)
	if err != nil {
		e := misc.HandleError(err)
		return filter.NewGetFilterDefault(int(*e.Code)).WithPayload(e)
	}
	return filter.NewGetFilterOK().WithPayload(&filter.GetFilterOKBody{Version: v, Data: f})
}

// Handle executing the request and returning a response
func (h *GetFiltersHandlerImpl) Handle(params filter.GetFiltersParams, principal interface{}) middleware.Responder {
	t := ""
	if params.TransactionID != nil {
		t = *params.TransactionID
	}

	configuration, err := h.Client.Configuration()
	if err != nil {
		e := misc.HandleError(err)
		return filter.NewGetFiltersDefault(int(*e.Code)).WithPayload(e)
	}

	v, fs, err := configuration.GetFilters(params.ParentType, params.ParentName, t)
	if err != nil {
		e := misc.HandleContainerGetError(err)
		if *e.Code == misc.ErrHTTPOk {
			return filter.NewGetFiltersOK().WithPayload(&filter.GetFiltersOKBody{Version: v, Data: models.Filters{}})
		}
		return filter.NewGetFiltersDefault(int(*e.Code)).WithPayload(e)
	}
	return filter.NewGetFiltersOK().WithPayload(&filter.GetFiltersOKBody{Version: v, Data: fs})
}

// Handle executing the request and returning a response
func (h *ReplaceFilterHandlerImpl) Handle(params filter.ReplaceFilterParams, principal interface{}) middleware.Responder {
	t := ""
	v := int64(0)
	if params.TransactionID != nil {
		t = *params.TransactionID
	}
	if params.Version != nil {
		v = *params.Version
	}

	if t != "" && *params.ForceReload {
		msg := "Both force_reload and transaction specified, specify only one"
		c := misc.ErrHTTPBadRequest
		e := &models.Error{
			Message: &msg,
			Code:    &c,
		}
		return filter.NewReplaceFilterDefault(int(*e.Code)).WithPayload(e)
	}

	configuration, err := h.Client.Configuration()
	if err != nil {
		e := misc.HandleError(err)
		return filter.NewGetFilterDefault(int(*e.Code)).WithPayload(e)
	}

	err = configuration.EditFilter(params.Index, params.ParentType, params.ParentName, params.Data, t, v)
	if err != nil {
		e := misc.HandleError(err)
		return filter.NewReplaceFilterDefault(int(*e.Code)).WithPayload(e)
	}
	if params.TransactionID == nil {
		if *params.ForceReload {
			err := h.ReloadAgent.ForceReload()
			if err != nil {
				e := misc.HandleError(err)
				return filter.NewReplaceFilterDefault(int(*e.Code)).WithPayload(e)
			}
			return filter.NewReplaceFilterOK().WithPayload(params.Data)
		}
		rID := h.ReloadAgent.Reload()
		return filter.NewReplaceFilterAccepted().WithReloadID(rID).WithPayload(params.Data)
	}
	return filter.NewReplaceFilterAccepted().WithPayload(params.Data)
}