Database handler check if a given hash is valid

src/database.cpp

@@ -60,6 +60,13 @@ namespace Database {
      */
     const static std::string PREPARED_STATEMENT_SELECT_FREELANCER_SALT = "selectFreelancerSalt";
     const static std::string SQL_STATEMENT_SELECT_FREELANCER_SALT = "select salt from freelancers where emailaddress = $1;";
+
+    /*
+     * Name and Statement for prepared statement to check if hash is valid
+     */
+    const static std::string PREPARED_STATEMENT_SELECT_CHECK_HASH_VALID = "selectCheckHashValid";
+    const static std::string SQL_STATEMENT_SELECT_CHECK_HASH_VALID = "select count(*) from freelancers where emailaddress = $1 AND hash = $2;";
+
     /*
      * Name and Statement for prepared statement to select a freelancer based on a given id
      */
@@ -342,6 +349,20 @@ namespace Database {
         work.commit();
         return result;
     }
+
+    /*
+     * Executes the prepared statement SELECT_CHECK_HASH_VALID
+     * Takes an open pqxx::connection and the emailAddress and hash to check
+     * Delivers 0 if email + hash are not valid 1 if they are
+     */
+    pqxx::result executePreparedStatement_SELECT_CHECK_HASH_VALID(pqxx::connection &connection, std::string emailAddress, std::string hash) {
+        connection.prepare(PREPARED_STATEMENT_SELECT_CHECK_HASH_VALID, SQL_STATEMENT_SELECT_CHECK_HASH_VALID);
+        pqxx::work work(connection);
+        pqxx::result result = work.exec_prepared(PREPARED_STATEMENT_SELECT_CHECK_HASH_VALID, emailAddress, hash);
+        work.commit();
+        return result;
+    }
+
     /*
      * Executes the prepared statement SELECT_TEMPLATE
      * Takes an open pqxx::connection and the id to select by