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drogon/drogon_ctl/create_view.cc

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/**
*
* create_view.cc
* An Tao
*
* Copyright 2018, An Tao. All rights reserved.
* https://github.com/an-tao/drogon
* Use of this source code is governed by a MIT license
* that can be found in the License file.
*
* Drogon
*
*/
#include "create_view.h"
#include "cmd.h"
#include <iostream>
#include <fstream>
#include <string>
#include <algorithm>
#include <regex>
static const std::string cxx_include = "<%inc";
static const std::string cxx_end = "%>";
static const std::string cxx_lang = "<%c++";
static const std::string cxx_view_data = "@@";
static const std::string cxx_output = "$$";
static const std::string cxx_val_start = "[[";
static const std::string cxx_val_end = "]]";
static const std::string sub_view_start = "<%view";
static const std::string sub_view_end = "%>";
using namespace drogon_ctl;
static std::string &replace_all(std::string &str, const std::string &old_value, const std::string &new_value)
{
std::string::size_type pos(0);
while (true)
{
//std::cout<<str<<endl;
//std::cout<<"pos="<<pos<<endl;
if ((pos = str.find(old_value, pos)) != std::string::npos)
{
str = str.replace(pos, old_value.length(), new_value);
pos += new_value.length() - old_value.length();
pos++;
}
else
break;
}
return str;
}
static void parseCxxLine(std::ofstream &oSrcFile, const std::string &line, const std::string &streamName, const std::string &viewDataName)
{
if (line.length() > 0)
{
std::string tmp = line;
replace_all(tmp, cxx_output, streamName);
replace_all(tmp, cxx_view_data, viewDataName);
oSrcFile << tmp << "\n";
}
}
static void outputVal(std::ofstream &oSrcFile, const std::string &streamName, const std::string &viewDataName, const std::string &keyName)
{
oSrcFile << "{\n";
oSrcFile << " auto & val=" << viewDataName << "[\"" << keyName << "\"];\n";
oSrcFile << " if(val.type()==typeid(const char *)){\n";
oSrcFile << " " << streamName << "<<*any_cast<const char *>(&val);\n";
oSrcFile << " }else if(val.type()==typeid(std::string)||val.type()==typeid(const std::string)){\n";
oSrcFile << " " << streamName << "<<*any_cast<const std::string>(&val);\n";
oSrcFile << " }\n";
oSrcFile << "}\n";
}
static void outputSubView(std::ofstream &oSrcFile, const std::string &streamName, const std::string &viewDataName, const std::string &keyName)
{
oSrcFile << "{\n";
oSrcFile << " auto templ=DrTemplateBase::newTemplate(\"" << keyName << "\");\n";
oSrcFile << " if(templ){\n";
oSrcFile << " " << streamName << "<< templ->genText(" << viewDataName << ");\n";
oSrcFile << " }\n";
oSrcFile << "}\n";
}
static void parseLine(std::ofstream &oSrcFile, std::string &line, const std::string &streamName, const std::string &viewDataName, int &cxx_flag, int returnFlag = 1)
{
std::string::size_type pos(0);
// std::cout<<line<<"("<<line.length()<<")\n";
if (line.length() == 0)
{
// std::cout<<"blank line!"<<std::endl;
// std::cout<<streamName<<"<<\"\\n\";\n";
if (returnFlag)
oSrcFile << streamName << "<<\"\\n\";\n";
return;
}
if (cxx_flag == 0)
{
//find cxx lang begin
if ((pos = line.find(cxx_lang)) != std::string::npos)
{
std::string oldLine = line.substr(0, pos);
if (oldLine.length() > 0)
parseLine(oSrcFile, oldLine, streamName, viewDataName, cxx_flag, 0);
std::string newLine = line.substr(pos + cxx_lang.length());
cxx_flag = 1;
if (newLine.length() > 0)
parseLine(oSrcFile, newLine, streamName, viewDataName, cxx_flag, returnFlag);
}
else
{
if ((pos = line.find(cxx_val_start)) != std::string::npos)
{
std::string oldLine = line.substr(0, pos);
parseLine(oSrcFile, oldLine, streamName, viewDataName, cxx_flag, 0);
std::string newLine = line.substr(pos + cxx_val_start.length());
if ((pos = newLine.find(cxx_val_end)) != std::string::npos)
{
std::string keyName = newLine.substr(0, pos);
auto iter = keyName.begin();
while (iter != keyName.end() && *iter == ' ')
iter++;
auto iterEnd = iter;
while (iterEnd != keyName.end() && *iterEnd != ' ')
iterEnd++;
keyName = std::string(iter, iterEnd);
outputVal(oSrcFile, streamName, viewDataName, keyName);
std::string tailLine = newLine.substr(pos + cxx_val_end.length());
parseLine(oSrcFile, tailLine, streamName, viewDataName, cxx_flag, returnFlag);
}
else
{
std::cerr << "format err!" << std::endl;
exit(1);
}
}
else if ((pos = line.find(sub_view_start)) != std::string::npos)
{
std::string oldLine = line.substr(0, pos);
parseLine(oSrcFile, oldLine, streamName, viewDataName, cxx_flag, 0);
std::string newLine = line.substr(pos + sub_view_start.length());
if ((pos = newLine.find(sub_view_end)) != std::string::npos)
{
std::string keyName = newLine.substr(0, pos);
auto iter = keyName.begin();
while (iter != keyName.end() && *iter == ' ')
iter++;
auto iterEnd = iter;
while (iterEnd != keyName.end() && *iterEnd != ' ')
iterEnd++;
keyName = std::string(iter, iterEnd);
outputSubView(oSrcFile, streamName, viewDataName, keyName);
std::string tailLine = newLine.substr(pos + sub_view_end.length());
parseLine(oSrcFile, tailLine, streamName, viewDataName, cxx_flag, returnFlag);
}
else
{
std::cerr << "format err!" << std::endl;
exit(1);
}
}
else
{
if (line.length() > 0)
{
replace_all(line, "\\", "\\\\");
replace_all(line, "\"", "\\\"");
oSrcFile << "\t" << streamName << " << \"" << line;
}
if (returnFlag)
oSrcFile << "\\n\";\n";
else
oSrcFile << "\";\n";
}
}
}
else
{
if ((pos = line.find(cxx_end)) != std::string::npos)
{
std::string newLine = line.substr(0, pos);
parseCxxLine(oSrcFile, newLine, streamName, viewDataName);
std::string oldLine = line.substr(pos + cxx_end.length());
cxx_flag = 0;
if (oldLine.length() > 0)
parseLine(oSrcFile, oldLine, streamName, viewDataName, cxx_flag, returnFlag);
}
else
{
parseCxxLine(oSrcFile, line, streamName, viewDataName);
}
}
}
void create_view::handleCommand(std::vector<std::string> &parameters)
{
for (auto iter = parameters.begin(); iter != parameters.end(); iter++)
{
auto file = *iter;
if (file == "-o" || file == "--output")
{
iter = parameters.erase(iter);
if (iter != parameters.end())
{
_outputPath = *iter;
iter = parameters.erase(iter);
}
break;
}
else if (file[0] == '-')
{
std::cout << ARGS_ERROR_STR << std::endl;
return;
}
}
createViewFiles(parameters);
}
void create_view::createViewFiles(std::vector<std::string> &cspFileNames)
{
for (auto const &file : cspFileNames)
{
std::cout << "create view:" << file << std::endl;
createViewFile(file);
}
}
int create_view::createViewFile(const std::string &script_filename)
{
std::cout << "create HttpView Class file by " << script_filename << std::endl;
std::ifstream infile(script_filename.c_str(), std::ifstream::in);
if (infile)
{
std::string::size_type pos = script_filename.rfind(".");
if (pos != std::string::npos)
{
std::string className = script_filename.substr(0, pos);
if ((pos = className.rfind("/")) != std::string::npos)
{
className = className.substr(pos + 1);
}
std::cout << "className=" << className << std::endl;
std::string headFileName = _outputPath + "/" + className + ".h";
std::string sourceFilename = _outputPath + "/" + className + ".cc";
std::ofstream oHeadFile(headFileName.c_str(), std::ofstream::out);
std::ofstream oSourceFile(sourceFilename.c_str(), std::ofstream::out);
if (!oHeadFile || !oSourceFile)
return -1;
newViewHeaderFile(oHeadFile, className);
newViewSourceFile(oSourceFile, className, infile);
}
else
return -1;
}
else
{
std::cerr << "can't open file " << script_filename << std::endl;
return -1;
}
return 0;
}
void create_view::newViewHeaderFile(std::ofstream &file, const std::string &className)
{
file << "//this file is generated by program automatically,don't modify it!\n";
file << "#include <drogon/DrTemplate.h>\n";
file << "using namespace drogon;\n";
file << "class " << className << ":public DrTemplate<" << className << ">\n";
file << "{\npublic:\n\t" << className << "(){};\n\tvirtual ~"
<< className << "(){};\n\t"
"virtual std::string genText(const DrTemplateData &) override;\n};";
}
void create_view::newViewSourceFile(std::ofstream &file, const std::string &className, std::ifstream &infile)
{
file << "//this file is generated by program(drogon_ctl) automatically,don't modify it!\n";
file << "#include \"" << className << ".h\"\n";
file << "#include <drogon/config.h>\n";
file << "#include <string>\n";
file << "#include <sstream>\n";
file << "#include <map>\n";
file << "#include <vector>\n";
file << "#include <set>\n";
file << "#include <iostream>\n";
file << "#include <unordered_map>\n";
file << "#include <unordered_set>\n";
file << "#include <algorithm>\n";
file << "#include <list>\n";
file << "#include <deque>\n";
file << "#include <queue>\n";
file << "using namespace std;\n";
// file <<"void __attribute__((constructor)) startup()\n";
// file <<"{std::cout<<\"dynamic lib start to load!\"<<std::endl;}\n";
// file <<"void __attribute__((destructor)) shutdown()\n";
// file <<"{std::cout<<\"dynamic lib start to unload!\"<<std::endl;}\n";
std::string buffer;
char line[8192];
int import_flag = 0;
while (infile.getline(line, sizeof(line)))
{
buffer = line;
std::string::size_type pos(0);
if (!import_flag)
{
std::string lowerBuffer = buffer;
std::transform(lowerBuffer.begin(), lowerBuffer.end(), lowerBuffer.begin(), ::tolower);
if ((pos = lowerBuffer.find(cxx_include)) != std::string::npos)
{
//std::cout<<"haha find it!"<<endl;
std::string newLine = buffer.substr(pos + cxx_include.length());
import_flag = 1;
if ((pos = newLine.find(cxx_end)) != std::string::npos)
{
newLine = newLine.substr(0, pos);
file << newLine << "\n";
break;
}
else
{
file << newLine << "\n";
}
}
}
else
{
//std::cout<<buffer<<endl;
if ((pos = buffer.find(cxx_end)) != std::string::npos)
{
std::string newLine = buffer.substr(0, pos);
file << newLine << "\n";
break;
}
else
{
//std::cout<<"to source file"<<buffer<<endl;
file << buffer << "\n";
}
}
}
//std::cout<<"import_flag="<<import_flag<<std::endl;
if (import_flag == 0)
{
infile.clear();
infile.seekg(0, std::ifstream::beg);
}
//std::cout<<"file pos:"<<infile.tellg()<<std::endl;
std::string viewDataName = className + "_view_data";
//virtual std::string genText(const DrTemplateData &)
file << "std::string " << className << "::genText(const DrTemplateData& " << viewDataName << ")\n{\n";
//std::string bodyName=className+"_bodystr";
std::string streamName = className + "_tmp_stream";
//oSrcFile <<"\tstd::string "<<bodyName<<";\n";
file << "\tstd::stringstream " << streamName << ";\n";
int cxx_flag = 0;
while (infile.getline(line, sizeof(line)))
{
buffer = line;
if (buffer.length() > 0)
{
std::regex re("\\{%[ \\t]*([^ \\t%]*)[^%]*%\\}");
buffer = std::regex_replace(buffer, re, "<%c++$$$$<<$1;%>");
}
parseLine(file, buffer, streamName, viewDataName, cxx_flag);
}
file << "return " << streamName << ".str();\n}\n";
}
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