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#include <assert.h>
#include <stdio.h>
#include "setup.h"
#include "til_settings.h"
#include "til_setup.h"
#include "til_str.h"
#include "til_util.h"
/* Helper for turning the failed desc into a char * and storing it in the provided place before propagating
* the error return value
*/
static int setup_ret_failed_desc_path(const til_setting_desc_t *failed_desc, int r, const char **res_failed_desc_path)
{
til_str_t *str;
assert(res_failed_desc_path);
str = til_str_new("");
if (!str)
return r;
if (til_setting_desc_strprint_path(failed_desc, str) < 0)
return r;
*res_failed_desc_path = til_str_to_buf(str, NULL);
return r;
}
/* returns negative on error, otherwise number of additions made to settings */
int setup_interactively(til_settings_t *settings, int (*setup_func)(const til_settings_t *settings, til_setting_t **res_setting, const til_setting_desc_t **res_desc, til_setup_t **res_setup), int defaults, til_setup_t **res_setup, const char **res_failed_desc_path)
{
unsigned additions = 0;
char buf[256] = "\n";
til_setting_t *setting;
const til_setting_desc_t *desc;
int r;
assert(settings);
assert(setup_func);
/* TODO: regex and error handling */
/* until all the setup_funcs guarantee they return the failed setting on -EINVAL w/non-NULL res_setup (finalizing),
* this will be done in two steps; this first loop just constructs the settings heirarchy, and if it fails with
* -EINVAL we will use the setting for logging. Then after this loop, one last recurrence of setup_func() w/res_setup
* actually set. Once all setup_funcs behave well even in res_setup we'll go back to just the loop on setup_func().
*/
while ((r = setup_func(settings, &setting, &desc, NULL)) > 0) {
assert(desc);
additions++;
/* if setup_func() has returned a description for an undescribed preexisting setting,
* validate its value against the description and assign the description if it passes.
*/
if (setting && !setting->desc) {
/* Apply override before, or after the spec_check()? unclear.
* TODO This probably also needs to move into a til_settings helper
*/
if (desc->spec.override) {
const char *o;
o = desc->spec.override(setting->value);
if (!o)
return -ENOMEM;
if (o != setting->value) {
r = til_setting_set_raw_value(setting, o);
free((void *)o);
if (r < 0)
return -ENOMEM;
}
}
r = til_setting_check_spec(setting, &desc->spec);
if (r < 0)
return setup_ret_failed_desc_path(desc, r, res_failed_desc_path);
if (desc->spec.as_nested_settings && !setting->value_as_nested_settings) {
char *label = NULL;
if (!desc->spec.key) {
/* generate a positional label for bare-value specs */
r = til_settings_label_setting(desc->container, setting, &label);
if (r < 0)
return r;
}
setting->value_as_nested_settings = til_settings_new(NULL, desc->container, desc->spec.key ? : label, til_setting_get_raw_value(setting));
free(label);
/* FIXME: til_settings_new() seems like it should return an errno, since it can encounter parse errors too? */
if (!setting->value_as_nested_settings)
return setup_ret_failed_desc_path(desc, -ENOMEM, res_failed_desc_path);
}
setting->desc = desc;
continue;
}
if (!defaults)
puts("");
if (desc->spec.values) {
unsigned i, preferred = 0;
int width = 0;
for (i = 0; desc->spec.values[i]; i++) {
int len;
len = strlen(desc->spec.values[i]);
if (len > width)
width = len;
}
/* multiple choice */
if (!defaults) {
til_setting_desc_fprint_path(desc, stdout);
printf(":\n %s:\n", desc->spec.name);
}
for (i = 0; desc->spec.values[i]; i++) {
if (!defaults)
printf(" %2u: %*s%s%s\n", i, width, desc->spec.values[i],
desc->spec.annotations ? ": " : "",
desc->spec.annotations ? desc->spec.annotations[i] : "");
if (!strcasecmp(desc->spec.preferred, desc->spec.values[i]))
preferred = i;
}
if (!defaults)
printf(" Enter a value 0-%u [%u (%s)]: ",
i - 1, preferred, desc->spec.preferred);
} else {
/* arbitrarily typed input */
if (!defaults) {
til_setting_desc_fprint_path(desc, stdout);
printf(":\n %s [%s]: ", desc->spec.name, desc->spec.preferred);
}
}
if (!defaults) {
fflush(stdout);
if (feof(stdin))
return -EIO;
fgets(buf, sizeof(buf), stdin);
}
if (*buf == '\n') {
/* accept preferred */
til_settings_add_value(desc->container, desc->spec.key, desc->spec.preferred);
} else {
buf[strlen(buf) - 1] = '\0';
if (desc->spec.values) {
unsigned i, j, found;
/* multiple choice, map numeric input to values entry */
if (sscanf(buf, "%u", &j) < 1) {
printf("Invalid input: \"%s\"\n", buf);
goto _next;
}
for (found = i = 0; desc->spec.values[i]; i++) {
if (i == j) {
til_settings_add_value(desc->container, desc->spec.key, desc->spec.values[i]);
found = 1;
break;
}
}
if (!found) {
printf("Invalid option: %u outside of range [0-%u]\n",
j, i - 1);
goto _next;
}
} else {
/* use typed input as setting, TODO: apply regex */
til_settings_add_value(desc->container, desc->spec.key, buf);
}
}
_next:
til_setting_desc_free(desc);
}
if (r < 0) {
if (r == -EINVAL)
return setup_ret_failed_desc_path(setting->desc, r, res_failed_desc_path);
return r;
}
r = setup_func(settings, &setting, &desc, res_setup);
return r < 0 ? r : additions;
}
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