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// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: (c) 2021 Ahmad Fatoum
#include <common.h>
#include <command.h>
#include <unistd.h>
#include <fcntl.h>
#include <complete.h>
#include <sys/stat.h>
#include <glob.h>
#include <getopt.h>
#include <magicvar.h>
#include <globalvar.h>
static int next_step;
BAREBOX_MAGICVAR(global.tutorial.step, "Next tutorial step.");
#define BUFSIZE 1024
static glob_t steps;
static int register_tutorial_vars(void)
{
char *oldcwd;
int ret = 0;
oldcwd = pushd("/env/data/tutorial");
if (!oldcwd)
return 0;
ret = glob("*", 0, NULL, &steps);
if (ret)
goto out;
ret = globalvar_add_simple_enum("tutorial.step", &next_step,
(const char **)steps.gl_pathv, steps.gl_pathc);
out:
popd(oldcwd);
return ret;
}
postenvironment_initcall(register_tutorial_vars);
static int print_tutorial_step(const char *step)
{
bool highlight = false;
int fd, ret, i;
char *buf;
fd = open(step, O_RDONLY);
if (fd < 0) {
printf("could not open /env/data/tutorial/%s\n", step);
return -errno;
}
buf = malloc(BUFSIZE);
if (!buf) {
ret = -ENOMEM;
goto out;
}
printf("%s\n", step);
while((ret = read(fd, buf, BUFSIZE)) > 0) {
for(i = 0; i < ret; i++) {
if (buf[i] != '`') {
putchar(buf[i]);
continue;
}
puts(highlight ? "\e[0m" : "\e[1;31m");
highlight = !highlight;
}
}
free(buf);
out:
close(fd);
return ret;
}
static int do_tutorial_next(int argc, char *argv[])
{
int opt, i;
char *step = NULL;
char *oldcwd;
ssize_t ret = 0;
bool is_prev = *argv[0] == 'p';
while ((opt = getopt(argc, argv, "rh")) > 0) {
switch (opt) {
case 'r':
if (steps.gl_pathc) {
globalvar_remove("tutorial.step");
next_step = 0;
globfree(&steps);
steps.gl_pathc = 0;
}
ret = register_tutorial_vars();
if (ret == 0 && steps.gl_pathc == 0)
ret = -ENOENT;
if (ret)
printf("could not load /env/data/tutorial/\n");
return ret;
case 'h':
default:
return COMMAND_ERROR_USAGE;
}
}
if (optind > argc + 1)
return COMMAND_ERROR_USAGE;
oldcwd = pushd("/env/data/tutorial");
if (!oldcwd)
return ret;
if (is_prev)
next_step = next_step > 0 ? next_step - 1 : 0;
if (optind == argc) {
step = steps.gl_pathv[next_step];
ret = print_tutorial_step(step);
if (ret == 0 && !is_prev)
next_step = (next_step + 1) % steps.gl_pathc;
} else {
for (i = optind; i < argc; i++) {
step = strdup(argv[i]);
ret = print_tutorial_step(step);
if (ret)
break;
}
}
popd(oldcwd);
return ret;
}
BAREBOX_CMD_HELP_START(next)
BAREBOX_CMD_HELP_TEXT("Help navigate the barebox tutorial")
BAREBOX_CMD_HELP_TEXT("Without a parameter, the next or previous tutorial step is printed")
BAREBOX_CMD_HELP_TEXT("Options:")
BAREBOX_CMD_HELP_OPT("-h\t", "show usage text")
BAREBOX_CMD_HELP_OPT("-r\t", "rewind and reload tutorial")
BAREBOX_CMD_HELP_END
static __maybe_unused const char *const prev_alias[] = { "prev", NULL};
BAREBOX_CMD_START(next)
.cmd = do_tutorial_next,
.aliases = prev_alias,
BAREBOX_CMD_DESC("navigate the barebox tutorial")
BAREBOX_CMD_OPTS("[-hr] [STEP]")
BAREBOX_CMD_HELP(cmd_next_help)
BAREBOX_CMD_GROUP(CMD_GRP_INFO)
BAREBOX_CMD_COMPLETE(tutorial_complete)
BAREBOX_CMD_END
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