✨ Nex.Rx, and easier to use alloc mq apis

pkg/nex/README.md

@@ -13,3 +13,7 @@ Cruda will help you to build a simplified database access layer based on the com
 ### Nex.Sec
 
 The security part of nexus, including signing and validating the tokens and much more.
+
+### Nex.Rx
+
+The reactive part of nexus, such as streaming events, and message queues stuff.

pkg/nex/cruda/allocator.go

@@ -10,9 +10,9 @@ import (
 )
 
 func (v *CrudConn) AllocDatabase(name string) (string, error) {
-	conn := v.Conn.GetNexusGrpcConn()
+	conn := v.n.GetNexusGrpcConn()
 	ctx := context.Background()
-	ctx = metadata.AppendToOutgoingContext(ctx, "client_id", v.Conn.Info.Id)
+	ctx = metadata.AppendToOutgoingContext(ctx, "client_id", v.n.Info.Id)
 	out, err := proto.NewDatabaseServiceClient(conn).AllocDatabase(ctx, &proto.AllocDatabaseRequest{
 		Name: name,
 	})
@@ -24,13 +24,13 @@ func (v *CrudConn) AllocDatabase(name string) (string, error) {
 	if err != nil {
 		return "", err
 	}
-	v.db = db
+	v.Db = db
 	return dsn, nil
 }
 
 func MigrateModel[T any](v *CrudConn, model T) error {
-	if v.db == nil {
+	if v.Db == nil {
 		return fmt.Errorf("database has not been allocated")
 	}
-	return v.db.AutoMigrate(model)
+	return v.Db.AutoMigrate(model)
 }

pkg/nex/cruda/command.go

@@ -15,7 +15,7 @@ func AddModel[T any](v *CrudConn, model T, id, prefix string, tags []string) err
 	funcCmds := []string{".list", "", "", "", ""}
 	funcMethods := []string{"get", "get", "put", "patch", "delete"}
 	for idx, fn := range funcList {
-		if err := v.Conn.AddCommand(prefix+id+funcCmds[idx], funcMethods[idx], tags, fn(v)); err != nil {
+		if err := v.n.AddCommand(prefix+id+funcCmds[idx], funcMethods[idx], tags, fn(v)); err != nil {
 			return err
 		}
 	}
@@ -31,12 +31,12 @@ func cmdList[T any](c *CrudConn) nex.CommandHandler {
 
 		var str T
 		var count int64
-		if err := c.db.Model(str).Count(&count).Error; err != nil {
+		if err := c.Db.Model(str).Count(&count).Error; err != nil {
 			return err
 		}
 
 		var out []T
-		if err := c.db.Offset(skip).Limit(take).Find(&out).Error; err != nil {
+		if err := c.Db.Offset(skip).Limit(take).Find(&out).Error; err != nil {
 			return err
 		}
 
@@ -55,7 +55,7 @@ func cmdGet[T any](c *CrudConn) nex.CommandHandler {
 		}
 
 		var out T
-		if err := c.db.First(&out, "id = ?", id).Error; err != nil {
+		if err := c.Db.First(&out, "id = ?", id).Error; err != nil {
 			if errors.Is(err, gorm.ErrRecordNotFound) {
 				return ctx.Write([]byte(err.Error()), "text/plain", http.StatusNotFound)
 			}
@@ -75,7 +75,7 @@ func cmdCreate[T any](c *CrudConn) nex.CommandHandler {
 			return ctx.Write([]byte(err.Error()), "text/plain+error", http.StatusBadRequest)
 		}
 
-		if err := c.db.Create(&payload).Error; err != nil {
+		if err := c.Db.Create(&payload).Error; err != nil {
 			return err
 		}
 
@@ -98,11 +98,11 @@ func cmdUpdate[T any](c *CrudConn) nex.CommandHandler {
 		}
 
 		var out T
-		if err := c.db.Model(out).Where("id = ?", id).Updates(&payload).Error; err != nil {
+		if err := c.Db.Model(out).Where("id = ?", id).Updates(&payload).Error; err != nil {
 			return err
 		}
 
-		if err := c.db.First(&out, "id = ?", id).Error; err != nil {
+		if err := c.Db.First(&out, "id = ?", id).Error; err != nil {
 			return err
 		}
 
@@ -118,7 +118,7 @@ func cmdDelete[T any](c *CrudConn) nex.CommandHandler {
 		}
 
 		var out T
-		if err := c.db.Delete(&out, "id = ?", id).Error; err != nil {
+		if err := c.Db.Delete(&out, "id = ?", id).Error; err != nil {
 			if errors.Is(err, gorm.ErrRecordNotFound) {
 				return ctx.Write([]byte(err.Error()), "text/plain", http.StatusNotFound)
 			}

pkg/nex/cruda/conn.go

@@ -6,13 +6,13 @@ import (
 )
 
 type CrudConn struct {
-	Conn *nex.Conn
+	n *nex.Conn
 
-	db *gorm.DB
+	Db *gorm.DB
 }
 
 func NewCrudaConn(conn *nex.Conn) *CrudConn {
 	return &CrudConn{
-		Conn: conn,
+		n: conn,
 	}
 }

pkg/nex/rx/mq_conn.go

@@ -0,0 +1,32 @@
+package rx
+
+import (
+	"fmt"
+	"git.solsynth.dev/hypernet/nexus/pkg/nex"
+	"github.com/nats-io/nats.go"
+)
+
+type MqConn struct {
+	n *nex.Conn
+
+	Nt *nats.Conn
+}
+
+func NewMqConn(conn *nex.Conn) (*MqConn, error) {
+	c := &MqConn{
+		n: conn,
+	}
+
+	mqAddr := conn.AllocResource(nex.AllocatableResourceMq)
+	if mqAddr == nil {
+		return nil, fmt.Errorf("unable to allocate resource: message queue")
+	} else if addr, ok := mqAddr.(string); !ok {
+		return nil, fmt.Errorf("alloced mq resource address is not a string")
+	} else if nc, err := nats.Connect(addr); err != nil {
+		return nil, fmt.Errorf("unable to connect to nats server: %v", err)
+	} else {
+		c.Nt = nc
+	}
+
+	return c, nil
+}

pkg/nex/rx/mq_io.go

@@ -0,0 +1,7 @@
+package rx
+
+import "git.solsynth.dev/hypernet/nexus/pkg/nex"
+
+func (v *MqConn) Publish(topic string, data any) error {
+	return v.Nt.Publish(topic, nex.EncodeMap(data))
+}