Refactor flags

Both QCM and Key are Flag

libfic/mcq.go

@@ -1,6 +1,7 @@
 package fic
 
 import (
+	"errors"
 	"fmt"
 	"time"
 )
@@ -175,13 +176,30 @@ func (e Exercice) WipeMCQs() (int64, error) {
 	}
 }
 
+// AddDepend insert a new dependency to a given flag.
+func (m MCQ) AddDepend(j Flag) (err error) {
+	return errors.New("Dependancy type not implemented for this flag.")
+}
+
+// GetDepends retrieve the flag's dependency list.
+func (m MCQ) GetDepends() ([]Flag, error) {
+	return nil, errors.New("Dependancy not implemented for MCQs.")
+}
+
 // GetJustifiedFlag searchs for a flag in the scope of the given exercice.
-func (c MCQ_entry) GetJustifiedFlag(e Exercice) (Flag, error) {
-	return e.GetFlagByLabel(fmt.Sprintf("\\%%%d\\%%%%", c.Id))
+func (c MCQ_entry) GetJustifiedFlag(e Exercice) (FlagKey, error) {
+	return e.GetFlagKeyByLabel(fmt.Sprintf("\\%%%d\\%%%%", c.Id))
 }
 
 // Check if the given vals are the expected ones to validate this flag.
-func (m MCQ) Check(vals map[int64]bool) int {
+func (m MCQ) Check(v interface{}) int {
+	var vals map[int64]bool
+	if va, ok := v.(map[int64]bool); !ok {
+		return -1
+	} else {
+		vals = va
+	}
+
 	diff := 0
 
 	for _, n := range m.Entries {