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#include <assert.h>
#include <stdio.h>
#include "til_settings.h"
#include "til_util.h"
/* add key=value, but if key is NULL, use value as key. */
static int add_value(til_settings_t *settings, const char *key, const char *value)
{
assert(settings);
if (!key) {
key = value;
value = NULL;
}
assert(key);
return til_settings_add_value(settings, key, value);
}
/* returns negative on error, otherwise number of additions made to settings */
int setup_interactively(til_settings_t *settings, int (*setup_func)(til_settings_t *settings, til_setting_desc_t **next), int defaults)
{
unsigned additions = 0;
char buf[256] = "\n";
til_setting_desc_t *next;
int r;
assert(settings);
assert(setup_func);
/* TODO: regex and error handling */
while ((r = setup_func(settings, &next)) > 0) {
additions++;
if (!defaults)
puts("");
if (next->values) {
unsigned i, preferred = 0;
int width = 0;
for (i = 0; next->values[i]; i++) {
int len;
len = strlen(next->values[i]);
if (len > width)
width = len;
}
/* multiple choice */
if (!defaults)
printf("%s:\n", next->name);
for (i = 0; next->values[i]; i++) {
if (!defaults)
printf("%2u: %*s%s%s\n", i, width, next->values[i],
next->annotations ? ": " : "",
next->annotations ? next->annotations[i] : "");
if (!strcmp(next->preferred, next->values[i]))
preferred = i;
}
if (!defaults)
printf("Enter a value 0-%u [%u (%s)]: ",
i - 1, preferred, next->preferred);
} else {
/* arbitrarily typed input */
if (!defaults)
printf("%s [%s]: ", next->name, next->preferred);
}
if (!defaults) {
fflush(stdout);
fgets(buf, sizeof(buf), stdin);
}
if (*buf == '\n') {
/* accept preferred */
add_value(settings, next->key, next->preferred);
} else {
buf[strlen(buf) - 1] = '\0';
if (next->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; next->values[i]; i++) {
if (i == j) {
add_value(settings, next->key, next->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 */
add_value(settings, next->key, buf);
}
}
_next:
til_setting_desc_free(next);
}
return r < 0 ? r : additions;
}
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