conversion_pattern.h

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//   ealogger is a simple, asynchronous and powerful logger library for c++
//   Copyright 2013 - 2016 Christian Rapp
//
//   Licensed under the Apache License, Version 2.0 (the "License");
//   you may not use this file except in compliance with the License.
//   You may obtain a copy of the License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
//   Unless required by applicable law or agreed to in writing, software
//   distributed under the License is distributed on an "AS IS" BASIS,
//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//   See the License for the specific language governing permissions and
//   limitations under the License.

#ifndef CONVERSION_PATTERN_H
#define CONVERSION_PATTERN_H

#include <iostream>
#include <string>

#include <ealogger/global.h>

namespace ealogger
{
struct ConversionPattern {
public:
    enum PATTERN_TYPE {
        DT = 0,        
        FILE,          
        FILE_ABSOLUTE, 
        LINE,          
        FUNC,          
        HOST,          
        THREADID,      
        MSG,           
        LVL            
    };

    ConversionPattern(std::string conv_pattern, const PATTERN_TYPE ptype)
        : conv_pattern(std::move(conv_pattern)), ptype(ptype){};

    template <typename T>
    void replace_conversion_pattern(std::string &msg, T new_value) const
    {
        this->replace_conversion_pattern(msg, std::to_string(new_value));
    }

    ConversionPattern::PATTERN_TYPE get_pattern_type() const
    {
        return this->ptype;
    }

private:
    std::string conv_pattern;
    const PATTERN_TYPE ptype;
};

template <>
inline void ConversionPattern::replace_conversion_pattern(
    std::string &msg, std::string new_value) const
{
    // set pos to 0. we use this pos to narrow down our search area
    // std::cout << "conv pattern: " << this->conv_pattern
    //<< " new_value: " << new_value << std::endl;
    size_t pos_in_string = 0;
    while ((pos_in_string = msg.find(this->conv_pattern, pos_in_string)) !=
           std::string::npos) {
        msg.replace(pos_in_string, this->conv_pattern.length(), new_value);
        pos_in_string += new_value.length();
    }
}
}
#endif /* ifndef CONVERSION_PATTERN_H */