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route.go
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route.go
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package types
import (
"context"
"errors"
"fmt"
"github.com/rainest/decklib/pkg/crud"
"github.com/rainest/decklib/pkg/state"
"github.com/kong/go-kong/kong"
)
// routeCRUD implements crud.Actions interface.
type routeCRUD struct {
client *kong.Client
}
// kong and konnect APIs only require IDs for referenced entities.
func stripRouteReferencesName(route *state.Route) {
if route.Route.Service != nil && route.Route.Service.Name != nil {
route.Route.Service.Name = nil
}
}
func routeFromStruct(arg crud.Event) *state.Route {
route, ok := arg.Obj.(*state.Route)
if !ok {
panic("unexpected type, expected *state.Route")
}
stripRouteReferencesName(route)
return route
}
// Create creates a Route in Kong.
// The arg should be of type crud.Event, containing the route to be created,
// else the function will panic.
// It returns a the created *state.Route.
func (s *routeCRUD) Create(ctx context.Context, arg ...crud.Arg) (crud.Arg, error) {
event := crud.EventFromArg(arg[0])
route := routeFromStruct(event)
createdRoute, err := s.client.Routes.Create(ctx, &route.Route)
if err != nil {
return nil, err
}
return &state.Route{Route: *createdRoute}, nil
}
// Delete deletes a Route in Kong.
// The arg should be of type crud.Event, containing the route to be deleted,
// else the function will panic.
// It returns a the deleted *state.Route.
func (s *routeCRUD) Delete(ctx context.Context, arg ...crud.Arg) (crud.Arg, error) {
event := crud.EventFromArg(arg[0])
route := routeFromStruct(event)
err := s.client.Routes.Delete(ctx, route.ID)
if err != nil {
return nil, err
}
return route, nil
}
// Update updates a Route in Kong.
// The arg should be of type crud.Event, containing the route to be updated,
// else the function will panic.
// It returns a the updated *state.Route.
func (s *routeCRUD) Update(ctx context.Context, arg ...crud.Arg) (crud.Arg, error) {
event := crud.EventFromArg(arg[0])
route := routeFromStruct(event)
updatedRoute, err := s.client.Routes.Create(ctx, &route.Route)
if err != nil {
return nil, err
}
return &state.Route{Route: *updatedRoute}, nil
}
type routeDiffer struct {
kind crud.Kind
currentState, targetState *state.KongState
}
func (d *routeDiffer) Deletes(handler func(crud.Event) error) error {
currentRoutes, err := d.currentState.Routes.GetAll()
if err != nil {
return fmt.Errorf("error fetching routes from state: %w", err)
}
for _, route := range currentRoutes {
n, err := d.deleteRoute(route)
if err != nil {
return err
}
if n != nil {
err = handler(*n)
if err != nil {
return err
}
}
}
return nil
}
func (d *routeDiffer) deleteRoute(route *state.Route) (*crud.Event, error) {
_, err := d.targetState.Routes.Get(*route.ID)
if errors.Is(err, state.ErrNotFound) {
return &crud.Event{
Op: crud.Delete,
Kind: d.kind,
Obj: route,
}, nil
}
if err != nil {
return nil, fmt.Errorf("looking up route %q: %w",
route.FriendlyName(), err)
}
return nil, nil
}
func (d *routeDiffer) CreateAndUpdates(handler func(crud.Event) error) error {
targetRoutes, err := d.targetState.Routes.GetAll()
if err != nil {
return fmt.Errorf("error fetching routes from state: %w", err)
}
for _, route := range targetRoutes {
n, err := d.createUpdateRoute(route)
if err != nil {
return err
}
if n != nil {
err = handler(*n)
if err != nil {
return err
}
}
}
return nil
}
func (d *routeDiffer) createUpdateRoute(route *state.Route) (*crud.Event, error) {
route = &state.Route{Route: *route.DeepCopy()}
currentRoute, err := d.currentState.Routes.Get(*route.ID)
if errors.Is(err, state.ErrNotFound) {
// route not present, create it
return &crud.Event{
Op: crud.Create,
Kind: d.kind,
Obj: route,
}, nil
}
if err != nil {
return nil, fmt.Errorf("error looking up route %q: %w",
route.FriendlyName(), err)
}
// found, check if update needed
if !currentRoute.EqualWithOpts(route, false, true, false) {
return &crud.Event{
Op: crud.Update,
Kind: d.kind,
Obj: route,
OldObj: currentRoute,
}, nil
}
return nil, nil
}
func (d *routeDiffer) DuplicatesDeletes() ([]crud.Event, error) {
targetRoutes, err := d.targetState.Routes.GetAll()
if err != nil {
return nil, fmt.Errorf("error fetching routes from state: %w", err)
}
var events []crud.Event
for _, route := range targetRoutes {
event, err := d.deleteDuplicateRoute(route)
if err != nil {
return nil, err
}
if event != nil {
events = append(events, *event)
}
}
return events, nil
}
func (d *routeDiffer) deleteDuplicateRoute(targetRoute *state.Route) (*crud.Event, error) {
if targetRoute == nil || targetRoute.Name == nil {
// Nothing to do, cannot be a duplicate with no name.
return nil, nil
}
currentRoute, err := d.currentState.Routes.Get(*targetRoute.Name)
if errors.Is(err, state.ErrNotFound) {
return nil, nil
}
if err != nil {
return nil, fmt.Errorf("error looking up route %q: %w", *targetRoute.Name, err)
}
if *currentRoute.ID != *targetRoute.ID {
return &crud.Event{
Op: crud.Delete,
Kind: "route",
Obj: currentRoute,
}, nil
}
return nil, nil
}