CsvParams.h

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// SPDX-License-Identifier: LGPL-3.0-or-later
/***********************************************************************************/
/*  Copyright 2023 WSL Institute for Snow and Avalanche Research    SLF-DAVOS      */
/***********************************************************************************/
/* This file is part of MeteoIO.
    MeteoIO is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    MeteoIO is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public License
    along with MeteoIO.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CSVPARAMS_H
#define CSVPARAMS_H
 
#include <meteoio/IOUtils.h>
#include <meteoio/IOInterface.h> //for LinesRange
 
#include <string>
#include <vector>
 
namespace mio {
 
class CsvDateTime {
        public:
                CsvDateTime(const double& tz_in);
                
                //this matches the formats that are supported in Date
                typedef enum DECIMAL_DATE_FORMATS {
                        EXCEL, 
                        JULIAN, 
                        MJULIAN, 
                        MATLAB, 
                        RFC868, 
                        UNIX 
                } decimal_date_formats;
                
                void updateMaxCol();
                int getFixedYear(const double& i_jdn);
                int getFixedYear(const int& i_month);
                int getFixedHour();
                bool isSet() const;
                
                void setDateTimeSpec(const std::string& datetime_spec);
                void setDateSpec(const std::string& date_spec);
                void setTimeSpec(const std::string& time_spec);
                void setDecimalDateType(std::string i_decimaldate_type);
                void setFixedYear(const int& i_year, const bool& i_auto_wrap);
                void setFixedHour(const int& i_hour);
                bool parseField(const std::string& fieldname, const size_t &ii);
                Date parseDate(const std::vector<std::string>& vecFields);
                std::string toString() const;
                
                size_t max_dt_col; 
                bool auto_wrap; 
                
        private:
                static bool parseDateComponent(const std::vector<std::string>& vecFields, const size_t& idx, int& value);
                static bool parseDateComponent(const std::vector<std::string>& vecFields, const size_t& idx, double& value);
                Date parseDate(const std::string& date_time_str) const;
                Date parseDate(const std::string& value_str, const CsvDateTime::decimal_date_formats& format) const;
                bool parseDate(const std::string& date_str, float args[3]) const;
                bool parseTime(const std::string& time_str, float args[3], double& tz) const;
                double parseTime(const std::string& time_str, double& tz) const;
                
                static int castToInt(const float &val);
                static void checkSpecString(const std::string& spec_string, const size_t& nr_params);
                
                std::vector<size_t> datetime_idx;               
                std::vector<size_t> date_idx;           
                std::vector<size_t> time_idx;           
                std::string datetime_format, date_format, time_format;          
                decimal_date_formats decimal_date_type; 
                double csv_tz;          
                //time is a field that contains numerical time, for example 0920
                size_t idx_decimal_date, idx_date_time_str, idx_date_str, idx_time_str, idx_year, idx_jdn, idx_month, idx_day, idx_ntime, idx_hours, idx_minutes, idx_seconds;
                static const int cutoff_year = 40;
                int year_cst, hour_cst; 
                bool has_tz;            
                bool dt_as_decimal;     
                bool dt_2digits_year;   
        };
 
class CsvParameters {
        public:
                CsvParameters(const double& tz_in);
                
                void setHeaderRepeatMk(const std::string& marker) {header_repeat_mk=marker;}
                void setDelimiter(const std::string& delim);
                void setHeaderDelimiter(const std::string& delim);
                void setSkipFields(const std::string& skipFieldSpecs, const bool& negate);
                void setUnits(const std::string& csv_units,  const char& delim=' ');
                void setLinesExclusions(const std::vector< LinesRange >& linesSpecs) {linesExclusions=linesSpecs;}
                void setNodata(const std::string& nodata_markers);
                void setPurgeChars(const std::string& chars_to_purge);
                void setFile(const std::string& i_file_and_path, const std::vector<std::string>& vecMetaSpec, const std::string& filename_spec, const std::string& station_idx="");
                void setLocation(const Coords i_location, const std::string& i_name, const std::string& i_id) {location=i_location; name=i_name; id=i_id;}
                void setSlope(const double& i_slope, const double& i_azimuth) {slope=i_slope; azi=i_azimuth;}
                void setDateTimeSpecs(const std::string &datetime_spec, const std::string &date_spec, const std::string &time_spec, const std::string &decimaldate_type);
                void setFixedYear(const int& i_year, const bool& i_auto_wrap) {date_cols.setFixedYear(i_year, i_auto_wrap);}
                void setFixedHour(const int& i_hour) {date_cols.setFixedHour(i_hour);}
                
                std::string toString() const;
                std::string getFilename() const {return file_and_path;}
                StationData getStation() const;
                Date getDate(const std::vector<std::string>& vecFields) {return date_cols.parseDate(vecFields);}
                bool excludeLine(const size_t& linenr, bool& hasExclusions);
                bool skipField(const size_t& fieldnr) const;
                bool hasPurgeChars() const {return !purgeCharsSet.empty();}
                void purgeChars(std::string &line) {IOUtils::removeChars(line, purgeCharsSet);}
                bool isNodata(const std::string& value) const;
                
                std::vector<std::string> csv_fields;            
                std::vector<double> units_offset, units_multiplier;             
                std::vector<double> field_offset, field_multiplier;             
                
                std::string header_repeat_mk, filter_ID, fields_postfix;
                size_t ID_col;
                size_t header_lines, columns_headers, units_headers;
                char csv_delim, header_delim;
                char eoln, comments_mk;
                bool header_repeat_at_start, asc_order;
                bool number_fields;     
                
        private:
                static std::string identifyField(const std::string& fieldname);
                void assignMetadataVariable(const std::string& field_type, const std::string& field_val, double &lat, double &lon, double &easting, double &northing);
                void parseFileName(std::string filename, const std::string& filename_spec, double &lat, double &lon, double &easting, double &northing);
                void parseFields(const std::vector<std::string>& headerFields, std::vector<std::string>& fieldNames);
                static std::multimap< size_t, std::pair<size_t, std::string> > parseHeadersSpecs(const std::vector<std::string>& vecMetaSpec);
                void parseSpecialHeaders(const std::string& line, const size_t& linenr, const std::multimap< size_t, std::pair<size_t, std::string> >& meta_spec, double &lat, double &lon, double &easting, double &northing);
                
                CsvDateTime date_cols;          
                Coords location;
                std::set<std::string> nodata;           
                std::set<size_t> skip_fields;           
                std::set<char> purgeCharsSet;                   
                std::vector< LinesRange > linesExclusions;      
                std::string file_and_path, single_field;                
                std::string name, id;
                double slope, azi;
                size_t exclusion_idx;           
                size_t exclusion_last_linenr; 
                size_t last_allowed_field;      
};
 
} //namespace
#endif