admin: Add exercice's tags: sync, api, interface done

libfic/exercice_tag.go

@@ -0,0 +1,52 @@
+package fic
+
+// GetTags returns tags associated with this exercice.
+func (e Exercice) GetTags() (tags []string, err error) {
+	if rows, errr := DBQuery("SELECT tag FROM exercice_tags WHERE id_exercice = ?", e.Id); errr != nil {
+		return nil, errr
+	} else {
+		defer rows.Close()
+
+		tags = make([]string, 0)
+		for rows.Next() {
+			var t string
+			if err = rows.Scan(&t); err != nil {
+				return
+			}
+			tags = append(tags, t)
+		}
+		err = rows.Err()
+		return
+	}
+}
+
+// AddTag assign a new tag to the exercice and registers it into the database.
+func (e Exercice) AddTag(tag string) (string, error) {
+	if _, err := DBExec("INSERT INTO exercice_tags (id_exercice, tag) VALUES (?, ?)", e.Id, tag); err != nil {
+		return "", err
+	} else {
+		return tag, nil
+	}
+}
+
+// DeleteTag delete a tag assigned to the current exercice from the database.
+func (e Exercice) DeleteTag(tag string) (int64, error) {
+	if res, err := DBExec("DELETE FROM exercice_tags WHERE id_exercice = ? AND tag = ?", e.Id, tag); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}
+
+// WipeTags delete all tag assigned to the current exercice from the database.
+func (e Exercice) WipeTags() (int64, error) {
+	if res, err := DBExec("DELETE FROM exercice_tags WHERE id_exercice = ?", e.Id); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}