backend fertig gestellt

frontend angefangen

planner/besucher.go

@@ -0,0 +1,8 @@
+package planner
+
+type Besucher struct {
+	ID      string `json:"id"`
+	Name    string `json:"name"`
+	Message string `json:"message"`
+	Come    bool   `json:"come"`
+}

planner/planner.go

@@ -0,0 +1,75 @@
+package planner
+
+import (
+	"errors"
+	"sync"
+
+	"github.com/rs/xid"
+)
+
+var (
+	list []Besucher
+	mtx  sync.RWMutex
+	once sync.Once
+)
+
+func init() {
+	once.Do(initialiseList)
+}
+
+func initialiseList() {
+	list = []Besucher{}
+}
+
+// Get retrieves all elements from the Besucher list
+func Get() []Besucher {
+	return list
+}
+
+// Add will add a new Besucher
+func Add(message string) string {
+	t := newBesucher(message)
+	mtx.Lock()
+	list = append(list, t)
+	mtx.Unlock()
+	return t.ID
+}
+
+// Delete will remove a Besucher from the Besucher list
+func Delete(id string) error {
+	location, err := findBesucherLocation(id)
+	if err != nil {
+		return err
+	}
+	removeElementByLocation(location)
+	return nil
+}
+
+func removeElementByLocation(i int) {
+	mtx.Lock()
+	list = append(list[:i], list[i+1:]...)
+	mtx.Unlock()
+}
+
+func findBesucherLocation(id string) (int, error) {
+	mtx.RLock()
+	defer mtx.RUnlock()
+	for i, t := range list {
+		if isMatchingID(t.ID, id) {
+			return i, nil
+		}
+	}
+	return 0, errors.New("Could not find Besucher based on id")
+}
+
+func isMatchingID(a, b string) bool {
+	return a == b
+}
+
+func newBesucher(message string) Besucher {
+	return Besucher{
+		ID:      xid.New().String(),
+		Message: message,
+		Come:    false,
+	}
+}