admin: New button to delete tries for a flag

libfic/flag.go

@@ -16,6 +16,7 @@ type Flag interface {
 	FoundBy(t *Team) error
 	NbTries() (int64, error)
 	TeamsOnIt() ([]int64, error)
+	DeleteTries() error
 }
 
 // GetFlag returns a list of flags comming with the challenge.

libfic/flag_key.go

@@ -255,6 +255,29 @@ func (k *FlagKey) TeamsOnIt() ([]int64, error) {
 	}
 }
 
+func (k *FlagKey) DeleteTries() error {
+	if rows, err := DBQuery("SELECT id_try FROM exercice_tries_flags WHERE id_flag = ?", k.Id); err != nil {
+		return err
+	} else {
+		defer rows.Close()
+
+		for rows.Next() {
+			var idtry int64
+			err = rows.Scan(&idtry)
+			if err != nil {
+				return err
+			}
+
+			_, err = DBExec("DELETE FROM exercice_tries WHERE id_try = ?", idtry)
+			if err != nil {
+				return err
+			}
+		}
+
+		return nil
+	}
+}
+
 // AddFlagKey creates and fills a new struct Flag, from a hashed flag, and registers it into the database.
 func (k *FlagKey) Create(e *Exercice) (Flag, error) {
 	// Check the regexp compile

libfic/flag_label.go

@@ -79,6 +79,10 @@ func (k *FlagLabel) TeamsOnIt() ([]int64, error) {
 	return nil, nil
 }
 
+func (k *FlagLabel) DeleteTries() error {
+	return nil
+}
+
 // AddFlagLabel creates and fills a new struct Flag and registers it into the database.
 func (k *FlagLabel) Create(e *Exercice) (Flag, error) {
 	if res, err := DBExec("INSERT INTO exercice_flag_labels (id_exercice, ordre, label, variant) VALUES (?, ?, ?, ?)", e.Id, k.Order, k.Label, k.Variant); err != nil {

libfic/mcq.go

@@ -161,6 +161,29 @@ func (m *MCQ) TeamsOnIt() ([]int64, error) {
 	}
 }
 
+func (m *MCQ) DeleteTries() error {
+	if rows, err := DBQuery("SELECT id_try FROM exercice_tries_mcq WHERE id_mcq = ?", m.Id); err != nil {
+		return err
+	} else {
+		defer rows.Close()
+
+		for rows.Next() {
+			var idtry int64
+			err = rows.Scan(&idtry)
+			if err != nil {
+				return err
+			}
+
+			_, err = DBExec("DELETE FROM exercice_tries WHERE id_try = ?", idtry)
+			if err != nil {
+				return err
+			}
+		}
+
+		return nil
+	}
+}
+
 // Create registers a MCQ into the database and recursively add its entries.
 func (m *MCQ) Create(e *Exercice) (Flag, error) {
 	if res, err := DBExec("INSERT INTO exercice_mcq (id_exercice, ordre, title) VALUES (?, ?, ?)", e.Id, m.Order, m.Title); err != nil {