Dynamic Configuration Refactoring

provider/label/segment.go

@@ -1,115 +0,0 @@
-package label
-
-import (
-	"regexp"
-	"strings"
-
-	"github.com/containous/traefik/log"
-)
-
-var (
-	// SegmentPropertiesRegexp used to extract the name of the segment and the name of the property for this segment
-	// All properties are under the format traefik.<segment_name>.frontend.*= except the port/portIndex/weight/protocol/backend directly after traefik.<segment_name>.
-	SegmentPropertiesRegexp = regexp.MustCompile(`^traefik\.(?P<segment_name>.+?)\.(?P<property_name>port|portIndex|portName|weight|protocol|backend|frontend\.(.+))$`)
-
-	// PortRegexp used to extract the port label of the segment
-	PortRegexp = regexp.MustCompile(`^traefik\.(?P<segment_name>.+?)\.port$`)
-)
-
-// SegmentPropertyValues is a map of segment properties
-// an example value is: weight=42
-type SegmentPropertyValues map[string]string
-
-// SegmentProperties is a map of segment properties per segment,
-// which we can get with label[segmentName][propertyName].
-// It yields a property value.
-type SegmentProperties map[string]SegmentPropertyValues
-
-// FindSegmentSubmatch split segment labels
-func FindSegmentSubmatch(name string) []string {
-	matches := SegmentPropertiesRegexp.FindStringSubmatch(name)
-	if matches == nil ||
-		strings.HasPrefix(name, TraefikFrontend+".") ||
-		strings.HasPrefix(name, TraefikBackend+".") {
-		return nil
-	}
-	return matches
-}
-
-// ExtractTraefikLabels transform labels to segment labels
-func ExtractTraefikLabels(originLabels map[string]string) SegmentProperties {
-	allLabels := make(SegmentProperties)
-
-	if _, ok := allLabels[""]; !ok {
-		allLabels[""] = make(SegmentPropertyValues)
-	}
-
-	for name, value := range originLabels {
-		if !strings.HasPrefix(name, Prefix) {
-			continue
-		}
-
-		matches := FindSegmentSubmatch(name)
-		if matches == nil {
-			// Classic labels
-			allLabels[""][name] = value
-		} else {
-			// segments labels
-			var segmentName string
-			var propertyName string
-			for i, name := range SegmentPropertiesRegexp.SubexpNames() {
-				// the group 0 is anonymous because it's always the root expression
-				if i != 0 {
-					if name == "segment_name" {
-						segmentName = matches[i]
-					} else if name == "property_name" {
-						propertyName = matches[i]
-					}
-				}
-			}
-
-			if _, ok := allLabels[segmentName]; !ok {
-				allLabels[segmentName] = make(SegmentPropertyValues)
-			}
-			allLabels[segmentName][Prefix+propertyName] = value
-		}
-	}
-
-	log.Debug("originLabels", originLabels)
-	log.Debug("allLabels", allLabels)
-
-	allLabels.mergeDefault()
-
-	return allLabels
-}
-
-func (s SegmentProperties) mergeDefault() {
-	// if SegmentProperties contains the default segment, merge each segments with the default segment
-	if defaultLabels, okDefault := s[""]; okDefault {
-
-		segmentsNames := s.GetSegmentNames()
-		if len(defaultLabels) > 0 {
-			for _, name := range segmentsNames {
-				segmentLabels := s[name]
-				for key, value := range defaultLabels {
-					if _, ok := segmentLabels[key]; !ok {
-						segmentLabels[key] = value
-					}
-				}
-			}
-		}
-
-		if len(segmentsNames) > 1 {
-			delete(s, "")
-		}
-	}
-}
-
-// GetSegmentNames get all segment names
-func (s SegmentProperties) GetSegmentNames() []string {
-	var names []string
-	for name := range s {
-		names = append(names, name)
-	}
-	return names
-}