database request to check if a freelancer is logged on

src/database.cpp

@@ -53,6 +53,12 @@ namespace Database {
     const static std::string PREPARED_STATEMENT_SELECT_CHECK_EMAIL_EXISTS = "selectCheckEmailExists";
     const static std::string SQL_STATEMENT_SELECT_CHECK_EMAIL_EXISTS = "select count(*) from freelancers where emailaddress = $1;";
 
+    /*
+     * Name and Statement for prepared statement to validate if a freelancer is already logged in
+     */
+    const static std::string PREPARED_STATEMENT_SELECT_CHECK_FREELANCER_LOGIN_STATE = "selectCheckFreelancerLoginState";
+    const static std::string SQL_STATEMENT_SELECT_CHECK_FREELANCER_LOGIN_STATE = "select count(*) from freelancers where emailaddress = $1 AND loginvalidationkey = $2;";
+
     /*
      * Name and Statement for prepared statement to get salt using a given email
      */
@@ -359,6 +365,17 @@ namespace Database {
         return result;
     }
 
+    /*
+     * Executes the prepared statement SELECT_CHECK_FREELANCER_LOGIN_STATE
+     * Takes an open pqxx::connection the loginKey and the id to check
+     * Delivers count of loginValidationKey occurence 0 for none 1+ for more
+     */
+    pqxx::result executePreparedStatement_SELECT_CHECK_FREELANCER_LOGIN_STATE(pqxx::connection &connection, const std::string& freelancerEmail, const std::string& loginKey) {
+        connection.prepare(PREPARED_STATEMENT_SELECT_CHECK_FREELANCER_LOGIN_STATE, SQL_STATEMENT_SELECT_CHECK_FREELANCER_LOGIN_STATE);
+        pqxx::work work(connection);
+        pqxx::result result = work.exec_prepared(PREPARED_STATEMENT_SELECT_CHECK_FREELANCER_LOGIN_STATE, freelancerEmail, loginKey);
+        work.commit();
+        connection.unprepare(PREPARED_STATEMENT_SELECT_CHECK_FREELANCER_LOGIN_STATE);
         return result;
     }