func getIngressInformation()

in internal/ingress/controller/template/template.go [961:1049]
72 lines of code
21 McCabe index (conditional complexity)

func getIngressInformation(i, h, p interface{}) *ingressInformation {
	ing, ok := i.(*ingress.Ingress)
	if !ok {
		klog.Errorf("expected an '*ingress.Ingress' type but %T was returned", i)
		return &ingressInformation{}
	}

	hostname, ok := h.(string)
	if !ok {
		klog.Errorf("expected a 'string' type but %T was returned", h)
		return &ingressInformation{}
	}

	ingressPath, ok := p.(string)
	if !ok {
		klog.Errorf("expected a 'string' type but %T was returned", p)
		return &ingressInformation{}
	}

	if ing == nil {
		return &ingressInformation{}
	}

	info := &ingressInformation{
		Namespace:   ing.GetNamespace(),
		Rule:        ing.GetName(),
		Annotations: ing.Annotations,
		Path:        ingressPath,
	}

	if ingressPath == "" {
		ingressPath = "/"
		info.Path = "/"
	}

	if ing.Spec.DefaultBackend != nil && ing.Spec.DefaultBackend.Service != nil {
		info.Service = ing.Spec.DefaultBackend.Service.Name
		if ing.Spec.DefaultBackend.Service.Port.Number > 0 {
			info.ServicePort = strconv.Itoa(int(ing.Spec.DefaultBackend.Service.Port.Number))
		} else {
			info.ServicePort = ing.Spec.DefaultBackend.Service.Port.Name
		}
	}

	for _, rule := range ing.Spec.Rules {
		if rule.HTTP == nil {
			continue
		}

		if hostname != "_" && rule.Host == "" {
			continue
		}

		host := "_"
		if rule.Host != "" {
			host = rule.Host
		}

		if hostname != host {
			continue
		}

		for _, rPath := range rule.HTTP.Paths {
			if ingressPath != rPath.Path {
				continue
			}

			if rPath.Backend.Service == nil {
				continue
			}

			if info.Service != "" && rPath.Backend.Service.Name == "" {
				// empty rule. Only contains a Path and PathType
				return info
			}

			info.Service = rPath.Backend.Service.Name
			if rPath.Backend.Service.Port.Number > 0 {
				info.ServicePort = strconv.Itoa(int(rPath.Backend.Service.Port.Number))
			} else {
				info.ServicePort = rPath.Backend.Service.Port.Name
			}

			return info
		}
	}

	return info
}