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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/v1alpha2"
"github.com/layer5io/meshkit/models/meshmodel/core/v1beta1"
"github.com/layer5io/meshkit/models/meshmodel/entity"
"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 v1beta1.Host `json:"host"`
EntityType entity.EntityType `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 entity.EntityType
CreatedAt time.Time
UpdatedAt time.Time
}
// 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{},
&v1beta1.Host{},
&v1beta1.ComponentDefinition{},
&v1alpha2.RelationshipDefinition{},
&v1beta1.PolicyDefinition{},
&v1beta1.Model{},
&v1beta1.Category{},
)
if err != nil {
return nil, err
}
return &rm, nil
}
func (rm *RegistryManager) Cleanup() {
_ = rm.db.Migrator().DropTable(
&Registry{},
&v1beta1.Host{},
&v1beta1.ComponentDefinition{},
&v1beta1.Model{},
&v1beta1.Category{},
&v1alpha2.RelationshipDefinition{},
)
}
func (rm *RegistryManager) RegisterEntity(h v1beta1.Host, en entity.Entity) error {
registrantID, err := h.Create(rm.db)
if err != nil {
return err
}
entityID, err := en.Create(rm.db, registrantID)
if err != nil {
return err
}
entry := Registry{
ID: uuid.New(),
RegistrantID: registrantID,
Entity: entityID,
Type: en.Type(),
CreatedAt: time.Now(),
UpdatedAt: time.Now(),
}
err = rm.db.Create(&entry).Error
if err != nil {
return err
}
return nil
}
// UpdateEntityStatus updates the ignore status of an entity based on the provided parameters.
// By default during models generation ignore is set to false
func (rm *RegistryManager) UpdateEntityStatus(ID string, status string, entityType string) error {
// Convert string UUID to google UUID
entityID, err := uuid.Parse(ID)
if err != nil {
return err
}
switch entityType {
case "models":
model := v1beta1.Model{ID: entityID}
err := model.UpdateStatus(rm.db, entity.EntityStatus(status))
if err != nil {
return err
}
return nil
default:
return nil
}
}
func (rm *RegistryManager) GetRegistrant(e entity.Entity) v1beta1.Host {
eID := e.GetID()
var reg Registry
_ = rm.db.Where("entity = ?", eID).Find(®).Error
var h v1beta1.Host
_ = rm.db.Where("id = ?", reg.RegistrantID).Find(&h).Error
return h
}
// to be removed
func (rm *RegistryManager) GetRegistrants(f *v1beta1.HostFilter) ([]v1beta1.MeshModelHostsWithEntitySummary, int64, error) {
var result []v1beta1.MesheryHostSummaryDB
var totalcount int64
db := rm.db
query := db.Table("hosts h").
Count(&totalcount).
Select("h.id AS host_id, h.hostname, h.port, " +
"COUNT(CASE WHEN r.type = 'component' THEN 1 END) AS components, " +
"COUNT(CASE WHEN r.type = 'model' THEN 1 END) AS models," +
"COUNT(CASE WHEN r.type = 'relationship' THEN 1 END) AS relationships, " +
"COUNT(CASE WHEN r.type = 'policy' THEN 1 END) AS policies").
Joins("LEFT JOIN registries r ON h.id = r.registrant_id").
Group("h.id, h.hostname, h.port")
if f.DisplayName != "" {
query = query.Where("hostname LIKE ?", "%"+f.DisplayName+"%")
}
if f.OrderOn != "" {
if f.Sort == "desc" {
query = query.Order(clause.OrderByColumn{Column: clause.Column{Name: f.OrderOn}, Desc: true})
} else {
query = query.Order(f.OrderOn)
}
} else {
query = query.Order("hostname")
}
query = query.Offset(f.Offset)
if f.Limit != 0 {
query = query.Limit(f.Limit)
}
err := query.Scan(&result).Error
if err != nil {
return nil, 0, err
}
var response []v1beta1.MeshModelHostsWithEntitySummary
for _, r := range result {
res := v1beta1.MeshModelHostsWithEntitySummary{
ID: r.HostID,
Hostname: HostnameToPascalCase(r.Hostname),
Port: r.Port,
Summary: v1beta1.EntitySummary{
Models: r.Models,
Components: r.Components,
Relationships: r.Relationships,
},
}
response = append(response, res)
}
return response, totalcount, nil
}
func (rm *RegistryManager) GetEntities(f entity.Filter) ([]entity.Entity, int64, int, error) {
return f.Get(rm.db)
}
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
}