upd: write userdatabase

backend/include/database.h

@@ -30,7 +30,7 @@ class BookDataBase {
   void QueryBook(const std::string &ISBN, const std::string &name,
                  const std::string &author, const std::string &keyword,
                  std::vector<BookItemClass> &ret);
-  void ModifyInfo(const std::string &ISBN, const std::string &name,
+  void ModifyInfo(const std::string &ISBN,const std::string &new_ISBN, const std::string &name,
                   const std::string &author, const std::string &keyword,
                   double price);
 };

backend/src/database.cpp

@@ -13,4 +13,50 @@ void BookDataBase::Open(std::string file_name) {
 void LogDataBase::Open(std::string file_name) {
   finance_data.OpenFile(file_name + ".finance");
   operation_log_data.OpenFile(file_name + ".log");
+}
+
+bool UserDataBase::PAM(const std::string &user_id,
+                       const std::string &password) {
+  auto ret = user_name2index.Find(user_id);
+  if (ret.size() != 1) return false;
+  UserItemClass tmp;
+  full_user_data.read(tmp, ret[0]);
+  return tmp.password == password;
+}
+
+int UserDataBase::GetPrevilege(const std::string &user_id) {
+  auto ret = user_name2index.Find(user_id);
+  if (ret.size() != 1) return -1;
+  UserItemClass tmp;
+  full_user_data.read(tmp, ret[0]);
+  return tmp.privilege;
+}
+
+void UserDataBase::AddUser(const std::string &user_id,
+                           const std::string &password,
+                           const std::string &user_name, int privilege) {
+  UserItemClass tmp;
+  strcpy(tmp.user_id, user_id.c_str());
+  strcpy(tmp.password, password.c_str());
+  strcpy(tmp.user_name, user_name.c_str());
+  tmp.privilege = privilege;
+  int idx = full_user_data.write(tmp);
+  user_name2index.Insert(user_id, idx);
+}
+
+void UserDataBase::DeleteUser(const std::string &user_id) {
+  auto ret = user_name2index.Find(user_id);
+  if (ret.size() != 1) return;
+  full_user_data.Delete(ret[0]);
+  user_name2index.Delete(user_id, ret[0]);
+}
+
+void UserDataBase::ChangePassword(const std::string &user_id,
+                                  const std::string &password) {
+  auto ret = user_name2index.Find(user_id);
+  if (ret.size() != 1) return;
+  UserItemClass tmp;
+  full_user_data.read(tmp, ret[0]);
+  strcpy(tmp.password, password.c_str());
+  full_user_data.update(tmp, ret[0]);
 }