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94 lines
3.5 KiB
C++
94 lines
3.5 KiB
C++
/***************************************************************************
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* Copyright (C) gempa GmbH *
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* All rights reserved. *
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* Contact: gempa GmbH (seiscomp-dev@gempa.de) *
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* *
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* GNU Affero General Public License Usage *
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* This file may be used under the terms of the GNU Affero *
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* Public License version 3.0 as published by the Free Software Foundation *
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* and appearing in the file LICENSE included in the packaging of this *
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* file. Please review the following information to ensure the GNU Affero *
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* Public License version 3.0 requirements will be met: *
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* https://www.gnu.org/licenses/agpl-3.0.html. *
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* *
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* Other Usage *
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* Alternatively, this file may be used in accordance with the terms and *
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* conditions contained in a signed written agreement between you and *
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* gempa GmbH. *
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***************************************************************************/
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#ifndef SEISCOMP_UTILS_REPLACE_H
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#define SEISCOMP_UTILS_REPLACE_H
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#include <string>
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#include <seiscomp/core.h>
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namespace Seiscomp {
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namespace Util {
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/**
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* Functor structur to resolve a variable and return
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* the content of it.
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*/
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struct SC_SYSTEM_CORE_API VariableResolver {
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/**
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* Resolves a variable. The default implementation replaces:
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* - hostname: The name of the host (uname -n)
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* - user: The name of the user (echo $USER)
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* - more to come...
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* When inheriting this class, call this method in the
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* new implementation to enable the build-in variables if this
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* behaviour in intended.
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* @param variable The variable name that has to be resolved. The result
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* will be written into it as well (inout).
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* @return Whether the variable could be resolved or not
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*/
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virtual bool resolve(std::string& variable) const;
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virtual ~VariableResolver() {};
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};
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/**
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* Replaces variables of a string by their content.
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* Variables have to be enclosed by '@'. Two '@' will be
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* replaced by one '@'.
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* Replacing the variable "host" results when feeding the
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* input string "hostname: @host@".
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* This function used the VariableResolver class and replaces
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* beside the default variables:
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* - [empty] => '@'
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* @param input The string containing variables to be replaced
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* @return The replaced input string
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*/
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SC_SYSTEM_CORE_API
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std::string replace(const std::string& input);
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/**
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* See: string replace(string)
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* @param input The string containing variables to be replaced
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* @param resolver A resolver functor that resolves the variable name
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* to its content.
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* @return The replaced input string
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*/
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SC_SYSTEM_CORE_API
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std::string replace(const std::string& input,
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const VariableResolver& resolver);
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SC_SYSTEM_CORE_API
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std::string replace(const char* input,
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const VariableResolver& resolver);
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SC_SYSTEM_CORE_API
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std::string replace(const std::string &input,
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const VariableResolver &resolver,
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const std::string &prefix, const std::string &postfix,
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const std::string &emptyValue);
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}
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}
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#endif
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