Calendar: Implement basic writing feature

In this commit several features were added as well.
Basic writing feature to a file. Added base64 decoding
to the reading feature. Checks whether or not the terminal
is too small. Basic help page.
This commit is contained in:
osamu-kj 2023-05-13 21:30:01 +02:00
parent ce025500ec
commit 87bb21be58
8 changed files with 398 additions and 10 deletions

View File

@ -18,7 +18,7 @@ endif()
project(vis
VERSION 1.0
DESCRIPTION "Vi Scheduler (vis) is a simple TUI program built for managing your schedules in a calendar-like grid."
LANGUAGES CXX)
LANGUAGES CXX C)
set(CMAKE_EXPORT_COMPILE_COMMANDS 1)

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@ -1,7 +1,9 @@
add_subdirectory(engine)
add_subdirectory(calendar)
add_subdirectory(base64)
add_executable(vis main.cpp)
target_link_libraries(vis engine)
target_link_libraries(vis calendar)
target_link_libraries(vis base64)

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@ -0,0 +1 @@
add_library(base64 SHARED base64.c)

209
src/base64/base64.c Normal file
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@ -0,0 +1,209 @@
/*
* Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/* ====================================================================
* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* 4. The names "Apache Server" and "Apache Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Group and was originally based
* on public domain software written at the National Center for
* Supercomputing Applications, University of Illinois, Urbana-Champaign.
* For more information on the Apache Group and the Apache HTTP server
* project, please see <http://www.apache.org/>.
*
*/
/* Base64 encoder/decoder. Originally Apache file ap_base64.c
*/
#include <string.h>
#include "base64.h"
/* aaaack but it's fast and const should make it shared text page. */
static const unsigned char pr2six[256] =
{
/* ASCII table */
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 62, 64, 64, 64, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64,
64, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 64, 64, 64, 64, 64,
64, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64
};
int Base64decode_len(const char *bufcoded)
{
int nbytesdecoded;
register const unsigned char *bufin;
register int nprbytes;
bufin = (const unsigned char *) bufcoded;
while (pr2six[*(bufin++)] <= 63);
nprbytes = (bufin - (const unsigned char *) bufcoded) - 1;
nbytesdecoded = ((nprbytes + 3) / 4) * 3;
return nbytesdecoded + 1;
}
int Base64decode(char *bufplain, const char *bufcoded)
{
int nbytesdecoded;
register const unsigned char *bufin;
register unsigned char *bufout;
register int nprbytes;
bufin = (const unsigned char *) bufcoded;
while (pr2six[*(bufin++)] <= 63);
nprbytes = (bufin - (const unsigned char *) bufcoded) - 1;
nbytesdecoded = ((nprbytes + 3) / 4) * 3;
bufout = (unsigned char *) bufplain;
bufin = (const unsigned char *) bufcoded;
while (nprbytes > 4) {
*(bufout++) =
(unsigned char) (pr2six[*bufin] << 2 | pr2six[bufin[1]] >> 4);
*(bufout++) =
(unsigned char) (pr2six[bufin[1]] << 4 | pr2six[bufin[2]] >> 2);
*(bufout++) =
(unsigned char) (pr2six[bufin[2]] << 6 | pr2six[bufin[3]]);
bufin += 4;
nprbytes -= 4;
}
/* Note: (nprbytes == 1) would be an error, so just ingore that case */
if (nprbytes > 1) {
*(bufout++) =
(unsigned char) (pr2six[*bufin] << 2 | pr2six[bufin[1]] >> 4);
}
if (nprbytes > 2) {
*(bufout++) =
(unsigned char) (pr2six[bufin[1]] << 4 | pr2six[bufin[2]] >> 2);
}
if (nprbytes > 3) {
*(bufout++) =
(unsigned char) (pr2six[bufin[2]] << 6 | pr2six[bufin[3]]);
}
*(bufout++) = '\0';
nbytesdecoded -= (4 - nprbytes) & 3;
return nbytesdecoded;
}
static const char basis_64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
int Base64encode_len(int len)
{
return ((len + 2) / 3 * 4) + 1;
}
int Base64encode(char *encoded, const char *string, int len)
{
int i;
char *p;
p = encoded;
for (i = 0; i < len - 2; i += 3) {
*p++ = basis_64[(string[i] >> 2) & 0x3F];
*p++ = basis_64[((string[i] & 0x3) << 4) |
((int) (string[i + 1] & 0xF0) >> 4)];
*p++ = basis_64[((string[i + 1] & 0xF) << 2) |
((int) (string[i + 2] & 0xC0) >> 6)];
*p++ = basis_64[string[i + 2] & 0x3F];
}
if (i < len) {
*p++ = basis_64[(string[i] >> 2) & 0x3F];
if (i == (len - 1)) {
*p++ = basis_64[((string[i] & 0x3) << 4)];
*p++ = '=';
}
else {
*p++ = basis_64[((string[i] & 0x3) << 4) |
((int) (string[i + 1] & 0xF0) >> 4)];
*p++ = basis_64[((string[i + 1] & 0xF) << 2)];
}
*p++ = '=';
}
*p++ = '\0';
return p - encoded;
}

101
src/base64/base64.h Normal file
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@ -0,0 +1,101 @@
/*
* Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/* ====================================================================
* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* 4. The names "Apache Server" and "Apache Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Group and was originally based
* on public domain software written at the National Center for
* Supercomputing Applications, University of Illinois, Urbana-Champaign.
* For more information on the Apache Group and the Apache HTTP server
* project, please see <http://www.apache.org/>.
*
*/
#ifndef _BASE64_H_
#define _BASE64_H_
#ifdef __cplusplus
extern "C" {
#endif
int Base64encode_len(int len);
int Base64encode(char * coded_dst, const char *plain_src,int len_plain_src);
int Base64decode_len(const char * coded_src);
int Base64decode(char * plain_dst, const char *coded_src);
#ifdef __cplusplus
}
#endif
#endif //_BASE64_H_

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@ -3,7 +3,6 @@
#include <string.h>
#include <ncurses.h>
#include <signal.h>
#include <regex>
#include "engine.hpp"
Engine::Engine(int padding, calendar_view_mode view_mode) {
@ -21,6 +20,15 @@ Engine::~Engine() {
}
void Engine::ui_draw(WINDOW *win) {
int screen_width, screen_height;
getmaxyx(win, screen_height, screen_width);
if (screen_height < 25 || screen_width < 70) {
this->ui_warning_draw(win, "Window resolution too small, please resize it."); return;
return;
}
this->input_block = false;
this->cells_table.clear();
box(win, 0, 0);
@ -46,6 +54,14 @@ void Engine::ui_draw(WINDOW *win) {
wrefresh(win);
}
void Engine::ui_warning_draw(WINDOW *win, const char *message) {
this->input_block = true;
mvwprintw(win, 0, 0, "%s", message);
wrefresh(win);
}
void Engine::ui_month_draw(WINDOW *win) {
calendar_information date_info = this->calendar->get_info();
int z = COLS - this->padding;
@ -109,6 +125,9 @@ void Engine::ui_bottom_draw(WINDOW *win) {
void Engine::input_handle(WINDOW *win) {
char key = getch();
if (this->input_block)
return;
if (this->input_handle_universal(win, key))
return;
@ -203,9 +222,12 @@ bool Engine::input_handle_universal(WINDOW *win, char key) {
break;
}
case 'w':
this->write_calendar();
break;
case 'q':
endwin();
this->calendar_file.close();
exit(EXIT_SUCCESS);
break;
default:
@ -283,12 +305,20 @@ void Engine::parse_line(std::string line) {
if (tokens.size() != 2)
return;
// decode the event from base64 before adding it into the events_map
calendar_information event_date = this->parse_date(tokens[0]);
this->events_map[event_date] = tokens[1];
int decoded_length = Base64decode_len((const char *) tokens[1].c_str());
char *event_decoded = (char *) malloc(decoded_length);
Base64decode(event_decoded, tokens[1].c_str());
this->events_map[event_date] = event_decoded;
}
void Engine::open_calendar(char *filename) {
this->calendar_file.open(filename, std::ios::in | std::ios::out);
this->calendar_file.open(filename, std::ios::in);
this->calendar_file_location = filename;
// If the file does not exist,
// we'll create and reopen it later ('write' shortcut)
@ -300,3 +330,34 @@ void Engine::open_calendar(char *filename) {
this->parse_line(line);
}
}
bool Engine::write_calendar() {
this->calendar_file.close();
this->calendar_file.open(this->calendar_file_location, std::ios::out | std::ios::trunc);
if (this->calendar_file.fail()) {
mvprintw(0, 0, "Error saving file.");
refresh();
getch();
return false;
}
for (auto const& event : this->events_map) {
std::stringstream output_line;
calendar_information date = event.first;
int encoded_length = Base64encode_len(event.second.length());
char *event_encoded = (char *) malloc(encoded_length);
Base64encode(event_encoded, event.second.c_str(), event.second.length());
output_line << date.current_day << ".";
output_line << date.current_month << ".";
output_line << date.current_year << " ";
output_line << event_encoded;
this->calendar_file << output_line.str() << std::endl;
}
return true;
}

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@ -2,11 +2,12 @@
#define ENGINE_HPP
#include <iostream>
#include <sstream>
#include <fstream>
#include <ncurses.h>
#include <vector>
// #include <unordered_map>
#include <map>
#include "../base64/base64.h"
#include "../calendar/calendar.hpp"
#include "../global/global.hpp"
@ -45,12 +46,14 @@ class Engine {
~Engine();
void ui_draw(WINDOW *win);
void ui_warning_draw(WINDOW *win, const char *message);
void ui_month_draw(WINDOW *win);
void ui_week_draw(WINDOW *win);
void ui_months_draw(WINDOW *win);
void ui_bottom_draw(WINDOW *win);
void ui_top_draw(WINDOW *win);
bool input_block;
void input_handle(WINDOW* win);
bool input_handle_universal(WINDOW *win, char key);
void input_handle_month(WINDOW *win, char key);
@ -60,6 +63,7 @@ class Engine {
calendar_information parse_date(std::string date);
void parse_line(std::string line);
void open_calendar(char *filename);
bool write_calendar();
Calendar *calendar;
// std::unordered_map<calendar_information, std::string> events_map;
@ -68,10 +72,10 @@ class Engine {
calendar_view_mode view_mode;
int padding; // padding
private:
std::vector<engine_child> cells_table;
std::fstream calendar_file;
char * calendar_file_location;
};
#endif

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@ -17,10 +17,10 @@ void sig_winch(int sig) {
wrefresh(main_win);
wresize(main_win, LINES, COLS);
mvwin(main_win, 0, 0);
// redraw the TUI after the resize signal
// if the resolution is too small, output a warning
// else redraw the TUI
engine.ui_draw(main_win);
flushinp();
@ -32,7 +32,16 @@ void signals() {
}
void print_help() {
std::cout << "\
VIS - Vim Scheduler\
\n\
\nUsage: vis [file]\
\n\
\nModes: \
\n - Month view (default): view the current month\
\n - Week view: view the current week\
\n - Months view: view the current year\
" << std::endl;
}
bool check_args(int argc, char **argv) {
@ -54,6 +63,7 @@ int main(int argc, char **argv) {
refresh();
curs_set(0); // invisible cursor
noecho();
refresh();
main_win = newwin(LINES, COLS, 0, 0);