file_path.cc

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/*
 * file_name.cc
 *
 *  Created on: May 23, 2012
 *      Author: jb
 */


#include <boost/filesystem.hpp>
#include <boost/algorithm/string.hpp>

#include "file_path.hh"
#include "system.hh"


// static data members
map<string,string> FilePath::placeholder;
string FilePath::output_dir="";
string FilePath::root_dir="";

FilePath::FilePath(const string file_path, const  FileType ft) {
    if (output_dir == "") {
        xprintf(Warn, "Creating FileName object before set_io_dirs is called. No file path resolving.\n");
        abs_file_path = file_path;
        return;
    }

    if (ft == input_file) {
        abs_file_path = root_dir + DIR_DELIMITER + file_path;
        substitute_value();
    } else if (ft == output_file) {
        if (file_path[0] == DIR_DELIMITER) {
            THROW( ExcAbsOutputPath() << EI_Path( file_path ) );
        }
        abs_file_path = output_dir + DIR_DELIMITER + file_path;
        substitute_value();
    }
}



void FilePath::set_io_dirs(const string working_dir, const string root_input_dir,const string input,const string output) {
    // root directory
    root_dir = root_input_dir;

    // relative output dir is relative to working directory
    // this is possibly independent of position of the main input file
    output_dir = "";
    if ( FilePath::is_absolute_path(output) ) {
        vector<string> dirs;
        boost::split(dirs, output,  boost::is_any_of("/"));
        for (vector<string>::iterator it = dirs.begin(); it != dirs.end(); ++it) {
            if ( !(*it).size() ) continue;
            if ( !output_dir.size() ) {
#ifdef CYGWIN
                output_dir = (*it);
#else
                output_dir = DIR_DELIMITER + *it;
#endif
            } else {
                output_dir = output_dir + DIR_DELIMITER + *it;
            }
            FilePath::create_output_dir();
        }
    } else {
        vector<string> dirs;
        string full_output = working_dir + DIR_DELIMITER + output;
        boost::split(dirs, full_output, boost::is_any_of("/"));
        for (vector<string>::iterator it = dirs.begin(); it != dirs.end(); ++it) {
            if ( !(*it).size() ) continue;
            if ( !output_dir.size() ) output_dir = *it;
            else output_dir = output_dir + DIR_DELIMITER + *it;
            FilePath::create_output_dir();
        }

        FilePath::create_canonical_path(working_dir, output);
    }

    // the relative input is relative to the directory of the main input file
    add_placeholder("${INPUT}", input);
}



void FilePath::add_placeholder(string key,string value) {
    placeholder[key] = value;
}


void FilePath::substitute_value() {
    for (std::map<std::string,std::string>::const_iterator it = this->placeholder.begin(); it != this->placeholder.end(); ++it) {
        size_t i = abs_file_path.find(it->first,0);
        if (i != std::string::npos) {
            if (it->second == "" ) xprintf(Warn, "Substituting placeholder %s with empty value.\n", it->first.c_str());
            abs_file_path.replace(i, it->first.size(), it->second);
        }
    }
}


bool FilePath::is_absolute_path(const string path) {
    if (path.size() == 0) xprintf(UsrErr, "Path can't be empty!\n");
#ifdef CYGWIN
    if (path.size() == 1) return false;
    return isalpha(path[0]) && (path[1] == ':');
#else
    return path[0] == DIR_DELIMITER;
#endif
}


const string FilePath::get_absolute_working_dir() {
    string abs_path = boost::filesystem::current_path().string();
#ifdef CYGWIN
    boost::replace_all(abs_path, "\\", "/");
#endif
    return abs_path;
}


bool FilePath::create_output_dir() {
    if (!boost::filesystem::is_directory(output_dir)) {
        boost::filesystem::create_directory(output_dir);
        return true;
    }
    return false;
}


void FilePath::create_canonical_path(const string working_dir, const string output) {
    boost::filesystem::path working_path = boost::filesystem::path(working_dir);
    boost::filesystem::path output_path = boost::filesystem::path(output);

    if (working_dir[0] != DIR_DELIMITER)
    {
        boost::filesystem::path curr = boost::filesystem::current_path();
        working_path = boost::filesystem::canonical( curr / working_path );
    }

    boost::filesystem::path full_path = boost::filesystem::canonical( working_path / output_path );

    boost::filesystem::path curr = boost::filesystem::current_path();
    output_dir = full_path.string();
#ifdef CYGWIN
    boost::replace_all(output_dir, "\\", "/");
#endif
}