Added more ICCC commands

+ Added ICCC command for register a host
+ Added ICCC command for register a command i.e. listener
+ Added ICCC command for getting a number from NumGen

NumGen/ICCCNextNumber.go

@@ -0,0 +1,45 @@
+package NumGen
+
+import (
+	"fmt"
+	"github.com/SommerEngineering/Ocean/ICCC"
+	"github.com/SommerEngineering/Ocean/ICCC/SystemMessages"
+	"github.com/SommerEngineering/Ocean/Log"
+	LM "github.com/SommerEngineering/Ocean/Log/Meta"
+)
+
+// The receiver function for the ICCC message, that registers a command.
+func ICCCNextNumber(data map[string][]string) (result map[string][]string) {
+
+	// Recover from errors:
+	defer func() {
+		if err := recover(); err != nil {
+			Log.LogFull(senderName, LM.CategorySYSTEM, LM.LevelERROR, LM.SeverityUnknown, LM.ImpactUnknown, LM.MessageNamePARSE, fmt.Sprintf("Was not able to execute the ICCC next number command message. %s", err))
+			result = make(map[string][]string, 0)
+			return
+		}
+	}()
+
+	// Converts the HTTP form data into an object:
+	_, _, obj := ICCC.Data2Message(SystemMessages.ICCCNumGenNext{}, data)
+
+	// Was it possible to convert the data?
+	if obj != nil {
+		// Cast the object to the right type (just as check):
+		_ = obj.(SystemMessages.ICCCNumGenNext)
+
+		// Execute the command:
+		nextNumber := GetUniqueID()
+
+		// An answer is necessary:
+		answer := SystemMessages.ICCCAnswerNumGen{}
+		answer.Number = nextNumber
+		return ICCC.Message2Data(``, ``, answer)
+	} else {
+		Log.LogShort(senderName, LM.CategorySYSTEM, LM.LevelINFO, LM.MessageNameSTARTUP, `ICCC message: Was not able to create the message.`)
+	}
+
+	// In any other error case:
+	result = make(map[string][]string, 0)
+	return
+}