Add simple passthrough logging operator

pkg/elem/manager.go

@@ -154,6 +154,7 @@ func init() {
 	Register(imageEncodeCfg)
 
 	Register(shellExecuteCfg)
+	Register(systemLogCfg)
 
 	variableStores = make(map[string]*variableStore)
 	variableMutex = &sync.Mutex{}

pkg/elem/system_log.go

@@ -0,0 +1,43 @@
+package elem
+
+import (
+	"github.com/Bitspark/slang/pkg/log"
+
+	"github.com/Bitspark/slang/pkg/core"
+	"github.com/google/uuid"
+)
+
+var systemLogId = uuid.MustParse("8f9c02df-da41-4266-b486-0c22173a6383")
+var systemLogCfg = &builtinConfig{
+	blueprint: core.Blueprint{
+		Id: systemLogId,
+		Meta: core.BlueprintMetaDef{
+			Name:             "log",
+			ShortDescription: "Logs any value passed through the configured logger",
+			Icon:             "align-center",
+			Tags:             []string{"system"},
+			DocURL:           "https://bitspark.de/slang/docs/operator/log",
+		},
+		ServiceDefs: map[string]*core.ServiceDef{
+			core.MAIN_SERVICE: {
+				In: core.TypeDef{
+					Type:    "generic",
+					Generic: "valueType",
+				},
+				Out: core.TypeDef{
+					Type:    "generic",
+					Generic: "valueType",
+				},
+			},
+		},
+	},
+	opFunc: func(op *core.Operator) {
+		in := op.Main().In()
+		out := op.Main().Out()
+		for !op.CheckStop() {
+			i := in.Pull()
+			log.Print(i)
+			out.Push(i)
+		}
+	},
+}