summaryrefslogtreecommitdiff
path: root/src/setup.c
blob: e027d1d8f52c4a401cf64c0b73d6a6252dc86d74 (plain)
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
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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
#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, NULL);
}


/* 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, const til_setting_t **res_setting, const til_setting_desc_t **res_desc), int defaults)
{
	unsigned			additions = 0;
	char				buf[256] = "\n";
	const til_setting_t		*setting;
	const til_setting_desc_t	*desc;
	int				r;

	assert(settings);
	assert(setup_func);

	/* TODO: regex and error handling */

	while ((r = setup_func(settings, &setting, &desc)) > 0) {
		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) {
			 /* XXX FIXME: this key as value exception is janky, make a helper to access the value or stop doing that. */
			r = til_setting_desc_check(desc, setting->value ? : setting->key);
			if (r < 0)
				return r;

			/* XXX FIXME everything's constified necessitating this fuckery, revisit and cleanup later, prolly another til_settings helper */
			((til_setting_t *)setting)->desc = desc;

			continue;
		}

		if (!defaults)
			puts("");

		if (desc->values) {
			unsigned	i, preferred = 0;
			int		width = 0;

			for (i = 0; desc->values[i]; i++) {
				int	len;

				len = strlen(desc->values[i]);
				if (len > width)
					width = len;
			}

			/* multiple choice */
			if (!defaults)
				printf("%s:\n", desc->name);

			for (i = 0; desc->values[i]; i++) {
				if (!defaults)
					printf("%2u: %*s%s%s\n", i, width, desc->values[i],
						desc->annotations ? ": " : "",
						desc->annotations ? desc->annotations[i] : "");

				if (!strcmp(desc->preferred, desc->values[i]))
					preferred = i;
			}

			if (!defaults)
				printf("Enter a value 0-%u [%u (%s)]: ",
					i - 1, preferred, desc->preferred);
		} else {
			/* arbitrarily typed input */
			if (!defaults)
				printf("%s [%s]: ", desc->name, desc->preferred);
		}

		if (!defaults) {
			fflush(stdout);
			fgets(buf, sizeof(buf), stdin);
		}

		if (*buf == '\n') {
			/* accept preferred */
			add_value(settings, desc->key, desc->preferred);
		} else {
			buf[strlen(buf) - 1] = '\0';

			if (desc->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->values[i]; i++) {
					if (i == j) {
						add_value(settings, desc->key, desc->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, desc->key, buf);
			}
		}
_next:
		til_setting_desc_free(desc);
	}

	return r < 0 ? r : additions;
}
© All Rights Reserved