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registry.go
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/
registry.go
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package registry
import (
"fmt"
"strings"
"time"
"github.com/google/uuid"
"github.com/layer5io/meshkit/database"
"github.com/layer5io/meshkit/models/meshmodel/core/types"
"github.com/layer5io/meshkit/models/meshmodel/core/v1alpha1"
"golang.org/x/text/cases"
"golang.org/x/text/language"
"gorm.io/gorm/clause"
)
// MeshModelRegistrantData struct defines the body of the POST request that is sent to the capability
// registry (Meshery)
//
// The body contains the
// 1. Host information
// 2. Entity type
// 3. Entity
type MeshModelRegistrantData struct {
Host Host `json:"host"`
EntityType types.CapabilityType `json:"entityType"`
Entity []byte `json:"entity"` //This will be type converted to appropriate entity on server based on passed entity type
}
type Registry struct {
ID uuid.UUID
RegistrantID uuid.UUID
Entity uuid.UUID
Type types.CapabilityType
CreatedAt time.Time
UpdatedAt time.Time
}
// Entity is referred as any type of schema managed by the registry
// ComponentDefinitions and PolicyDefinitions are examples of entities
type Entity interface {
Type() types.CapabilityType
GetID() uuid.UUID
}
// RegistryManager instance will expose methods for registry operations & sits between the database level operations and user facing API handlers.
type RegistryManager struct {
db *database.Handler //This database handler will be used to perform queries inside the database
}
// NewRegistryManager initializes the registry manager by creating appropriate tables.
// Any new entities that are added to the registry should be migrated here into the database
func NewRegistryManager(db *database.Handler) (*RegistryManager, error) {
if db == nil {
return nil, fmt.Errorf("nil database handler")
}
rm := RegistryManager{
db: db,
}
err := rm.db.AutoMigrate(
&Registry{},
&Host{},
&v1alpha1.ComponentDefinitionDB{},
&v1alpha1.RelationshipDefinitionDB{},
&v1alpha1.PolicyDefinitionDB{},
&v1alpha1.ModelDB{},
&v1alpha1.CategoryDB{},
)
if err != nil {
return nil, err
}
return &rm, nil
}
func (rm *RegistryManager) Cleanup() {
_ = rm.db.Migrator().DropTable(
&Registry{},
&Host{},
&v1alpha1.ComponentDefinitionDB{},
&v1alpha1.ModelDB{},
&v1alpha1.CategoryDB{},
&v1alpha1.RelationshipDefinitionDB{},
)
}
func (rm *RegistryManager) RegisterEntity(h Host, en Entity) error {
switch entity := en.(type) {
case v1alpha1.ComponentDefinition:
if entity.Schema == "" { //For components with an empty schema, exit quietly
return nil
}
componentID, err := v1alpha1.CreateComponent(rm.db, entity)
if err != nil {
return err
}
registrantID, err := createHost(rm.db, h)
if err != nil {
return err
}
entry := Registry{
ID: uuid.New(),
RegistrantID: registrantID,
Entity: componentID,
Type: en.Type(),
CreatedAt: time.Now(),
UpdatedAt: time.Now(),
}
return rm.db.Create(&entry).Error
case v1alpha1.RelationshipDefinition:
relationshipID, err := v1alpha1.CreateRelationship(rm.db, entity)
if err != nil {
return err
}
registrantID, err := createHost(rm.db, h)
if err != nil {
return err
}
entry := Registry{
ID: uuid.New(),
RegistrantID: registrantID,
Entity: relationshipID,
Type: en.Type(),
CreatedAt: time.Now(),
UpdatedAt: time.Now(),
}
return rm.db.Create(&entry).Error
//Add logic for Policies and other entities below
case v1alpha1.PolicyDefinition:
policyID, err := v1alpha1.CreatePolicy(rm.db, entity)
if err != nil {
return err
}
registrantID, err := createHost(rm.db, h)
if err != nil {
return err
}
entry := Registry{
ID: uuid.New(),
RegistrantID: registrantID,
Entity: policyID,
Type: en.Type(),
CreatedAt: time.Now(),
UpdatedAt: time.Now(),
}
return rm.db.Create(&entry).Error
default:
return nil
}
}
func (rm *RegistryManager) GetEntities(f types.Filter) ([]Entity, *int64, *int) {
switch filter := f.(type) {
case *v1alpha1.ComponentFilter:
en := make([]Entity, 0)
comps, count, unique := v1alpha1.GetMeshModelComponents(rm.db, *filter)
for _, comp := range comps {
en = append(en, comp)
}
return en, &count, &unique
case *v1alpha1.RelationshipFilter:
en := make([]Entity, 0)
relationships, count := v1alpha1.GetMeshModelRelationship(rm.db, *filter)
for _, rel := range relationships {
en = append(en, rel)
}
return en, &count, nil
case *v1alpha1.PolicyFilter:
en := make([]Entity, 0)
policies := v1alpha1.GetMeshModelPolicy(rm.db, *filter)
for _, pol := range policies {
en = append(en, pol)
}
return en, nil, nil
default:
return nil, nil, nil
}
}
func (rm *RegistryManager) GetModels(db *database.Handler, f types.Filter) ([]v1alpha1.Model, int64, int) {
var m []v1alpha1.Model
type modelWithCategories struct {
v1alpha1.ModelDB
v1alpha1.CategoryDB
}
countUniqueModels := func(models []modelWithCategories) int {
set := make(map[string]struct{})
for _, model := range models {
key := model.ModelDB.Name + "@" + model.ModelDB.Version
if _, ok := set[key]; !ok {
set[key] = struct{}{}
}
}
return len(set)
}
var modelWithCategoriess []modelWithCategories
finder := db.Model(&v1alpha1.ModelDB{}).
Select("model_dbs.*, category_dbs.*").
Joins("JOIN category_dbs ON model_dbs.category_id = category_dbs.id") //
// total count before pagination
var count int64
if mf, ok := f.(*v1alpha1.ModelFilter); ok {
if mf.Greedy {
if mf.Name != "" && mf.DisplayName != "" {
finder = finder.Where("model_dbs.name LIKE ? OR model_dbs.display_name LIKE ?", "%"+mf.Name+"%", "%"+mf.DisplayName+"%")
} else if mf.Name != "" {
finder = finder.Where("model_dbs.name LIKE ?", "%"+mf.Name+"%")
} else if mf.DisplayName != "" {
finder = finder.Where("model_dbs.display_name LIKE ?", "%"+mf.DisplayName+"%")
}
} else {
if mf.Name != "" {
finder = finder.Where("model_dbs.name = ?", mf.Name)
}
if mf.DisplayName != "" {
finder = finder.Where("model_dbs.display_name = ?", mf.DisplayName)
}
}
if mf.Version != "" {
finder = finder.Where("model_dbs.version = ?", mf.Version)
}
if mf.Category != "" {
finder = finder.Where("category_dbs.name = ?", mf.Category)
}
if mf.OrderOn != "" {
if mf.Sort == "desc" {
finder = finder.Order(clause.OrderByColumn{Column: clause.Column{Name: mf.OrderOn}, Desc: true})
} else {
finder = finder.Order(mf.OrderOn)
}
}
finder.Count(&count)
if mf.Limit != 0 {
finder = finder.Limit(mf.Limit)
}
if mf.Offset != 0 {
finder = finder.Offset(mf.Offset)
}
}
err := finder.
Scan(&modelWithCategoriess).Error
if err != nil {
fmt.Println(modelWithCategoriess)
fmt.Println(err.Error()) //for debugging
}
for _, modelDB := range modelWithCategoriess {
m = append(m, modelDB.ModelDB.GetModel(modelDB.GetCategory(db)))
}
return m, count, countUniqueModels(modelWithCategoriess)
}
func (rm *RegistryManager) GetCategories(db *database.Handler, f types.Filter) ([]v1alpha1.Category, int64) {
var catdb []v1alpha1.CategoryDB
var cat []v1alpha1.Category
finder := rm.db.Model(&catdb)
// total count before pagination
var count int64
if mf, ok := f.(*v1alpha1.CategoryFilter); ok {
if mf.Name != "" {
if mf.Greedy {
finder = finder.Where("name LIKE ?", "%"+mf.Name+"%")
} else {
finder = finder.Where("name = ?", mf.Name)
}
}
if mf.OrderOn != "" {
if mf.Sort == "desc" {
finder = finder.Order(clause.OrderByColumn{Column: clause.Column{Name: mf.OrderOn}, Desc: true})
} else {
finder = finder.Order(mf.OrderOn)
}
}
finder.Count(&count)
if mf.Limit != 0 {
finder = finder.Limit(mf.Limit)
}
if mf.Offset != 0 {
finder = finder.Offset(mf.Offset)
}
}
if count == 0 {
finder.Count(&count)
}
_ = finder.Find(&catdb).Error
for _, c := range catdb {
cat = append(cat, c.GetCategory(db))
}
return cat, count
}
func (rm *RegistryManager) GetRegistrant(e Entity) Host {
eID := e.GetID()
var reg Registry
_ = rm.db.Where("entity = ?", eID).Find(®).Error
var h Host
_ = rm.db.Where("id = ?", reg.RegistrantID).Find(&h).Error
return h
}
func HostnameToPascalCase(input string) string {
parts := strings.Split(input, ".")
caser := cases.Title(language.English)
for i, part := range parts {
parts[i] = caser.String(part)
}
pascalCaseHostname := strings.Join(parts, " ")
return pascalCaseHostname
}