Initial commit

rules/interface.go

@@ -0,0 +1,49 @@
+package rules
+
+import (
+	"fmt"
+	"log"
+
+	"git.beisel.it/florian/hostname-service/db"
+)
+
+type HostnameRule interface {
+	Generate(params map[string]interface{}) (string, []byte, error)
+	Insert(category string, hostname string, paramsJSON []byte) error
+	Update(category string, oldhostname string, hostname string, paramsJSON []byte) error
+}
+
+type BaseRule struct{}
+
+func (br *BaseRule) baseInsert(category string, hostname string, paramsJSON []byte) error {
+	exists, err := db.HostnameExists(category, hostname)
+	if err != nil {
+		return fmt.Errorf("error checking existence of hostname: %v", err.Error())
+	}
+	if exists {
+		return fmt.Errorf("hostname %s does not exist in category %s", hostname, category)
+	}
+	err = db.InsertHostname(category, hostname, paramsJSON)
+	if err != nil {
+		log.Printf("Error inserting hostname into DB: %v", err)
+		return err
+	}
+	return nil
+}
+
+func (br *BaseRule) baseUpdate(category string, oldhostname string, hostname string, paramsJSON []byte) error {
+	exists, err := db.HostnameExists(category, hostname)
+	if err != nil {
+		return fmt.Errorf("error checking existence of hostname: %v", err.Error())
+	}
+	if !exists {
+		return fmt.Errorf("hostname %s does not exist in category %s", oldhostname, category)
+	}
+
+	err = db.UpdateHostname(category, oldhostname, hostname, paramsJSON)
+	if err != nil {
+		log.Printf("Error inserting hostname into DB: %v", err)
+		return err
+	}
+	return nil
+}