aboutsummaryrefslogtreecommitdiffstats
path: root/src/note.c
blob: 92c1ecfef46e467c4e6471431c65bc596aa042da (plain) (blame)
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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
/*
 * Calcurse - text-based organizer
 *
 * Copyright (c) 2004-2020 calcurse Development Team <misc@calcurse.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the
 *        following disclaimer.
 *
 *      - 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS 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 COPYRIGHT
 * OWNER OR 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.
 *
 * Send your feedback or comments to : misc@calcurse.org
 * Calcurse home page : http://calcurse.org
 *
 */

#include <unistd.h>
#include <dirent.h>

#include "calcurse.h"
#include "sha1.h"

struct note_gc_hash {
	char *hash;
	char buf[MAX_NOTESIZ + 1];
	 HTABLE_ENTRY(note_gc_hash);
};

static void note_gc_extract_key(struct note_gc_hash *, const char **,
				int *);
static int note_gc_cmp(struct note_gc_hash *, struct note_gc_hash *);

HTABLE_HEAD(htp, NOTE_GC_HSIZE, note_gc_hash);
HTABLE_PROTOTYPE(htp, note_gc_hash)
    HTABLE_GENERATE(htp, note_gc_hash, note_gc_extract_key, note_gc_cmp)

/* Create note file from a string and return a newly allocated string that
 * contains its name. */
char *generate_note(const char *str)
{
	char *sha1 = mem_malloc(SHA1_DIGESTLEN * 2 + 1);
	char *notepath;
	FILE *fp;

	sha1_digest(str, sha1);
	asprintf(&notepath, "%s%s", path_notes, sha1);
	fp = fopen(notepath, "w");
	EXIT_IF(fp == NULL, _("Warning: could not open %s, Aborting..."),
		notepath);
	fputs(str, fp);
	file_close(fp, __FILE_POS__);

	mem_free(notepath);
	return sha1;
}

/* Edit a note with an external editor. */
void edit_note(char **note, const char *editor)
{
	char *tmpprefix = NULL, *tmppath = NULL;
	char *notepath = NULL;
	char *sha1 = mem_malloc(SHA1_DIGESTLEN * 2 + 1);
	FILE *fp;

	asprintf(&tmpprefix, "%s/calcurse-note", get_tempdir());
	if ((tmppath = new_tempfile(tmpprefix)) == NULL)
		goto cleanup;

	if (*note != NULL) {
		asprintf(&notepath, "%s%s", path_notes, *note);
		io_file_cp(notepath, tmppath);
	}

	const char *arg[] = { editor, tmppath, NULL };
	wins_launch_external(arg);

	if (io_file_is_empty(tmppath) > 0) {
		erase_note(note);
	} else if ((fp = fopen(tmppath, "r"))) {
		sha1_stream(fp, sha1);
		fclose(fp);
		*note = sha1;

		mem_free(notepath);
		asprintf(&notepath, "%s%s", path_notes, *note);
		io_file_cp(tmppath, notepath);
		mem_free(notepath);
	}

	unlink(tmppath);

cleanup:
	mem_free(tmpprefix);
	mem_free(tmppath);
}

/* View a note in an external pager. */
void view_note(const char *note, const char *pager)
{
	char *fullname;

	if (note == NULL)
		return;
	asprintf(&fullname, "%s%s", path_notes, note);

	const char *arg[] = { pager, fullname, NULL };
	wins_launch_external(arg);

	mem_free(fullname);
}

/* Erase a note previously attached to an item. */
void erase_note(char **note)
{
	if (*note == NULL)
		return;
	mem_free(*note);
	*note = NULL;
}

/* Read a serialized note file name from a stream and deserialize it. */
void note_read(char *buffer, FILE * fp)
{
	int i;

	for (i = 0; i < MAX_NOTESIZ; i++) {
		buffer[i] = getc(fp);
		if (buffer[i] == ' ') {
			buffer[i] = '\0';
			return;
		}
	}

	while (getc(fp) != ' ') ;
	buffer[MAX_NOTESIZ] = '\0';
}

static void
note_gc_extract_key(struct note_gc_hash *data, const char **key, int *len)
{
	*key = data->hash;
	*len = strlen(data->hash);
}

static int note_gc_cmp(struct note_gc_hash *a, struct note_gc_hash *b)
{
	return strcmp(a->hash, b->hash);
}

/* Spot and unlink unused note files. */
void note_gc(void)
{
	struct htp gc_htable = HTABLE_INITIALIZER(&gc_htable);
	struct note_gc_hash *hp;
	DIR *dirp;
	struct dirent *dp;
	llist_item_t *i;
	struct note_gc_hash tmph;
	char *notepath;

	if (!(dirp = opendir(path_notes)))
		return;

	/* Insert all note file names into a hash table. */
	do {
		if ((dp = readdir(dirp)) && *(dp->d_name) != '.') {
			hp = mem_malloc(sizeof(struct note_gc_hash));

			strncpy(hp->buf, dp->d_name, MAX_NOTESIZ + 1);
			hp->buf[MAX_NOTESIZ] = '\0';
			hp->hash = hp->buf;

			HTABLE_INSERT(htp, &gc_htable, hp);
		}
	}
	while (dp);

	closedir(dirp);

	/* Remove hashes that are actually in use. */
	LLIST_TS_FOREACH(&alist_p, i) {
		struct apoint *apt = LLIST_GET_DATA(i);
		if (apt->note) {
			tmph.hash = apt->note;
			mem_free(HTABLE_REMOVE(htp, &gc_htable, &tmph));
		}
	}

	LLIST_FOREACH(&eventlist, i) {
		struct event *ev = LLIST_GET_DATA(i);
		if (ev->note) {
			tmph.hash = ev->note;
			mem_free(HTABLE_REMOVE(htp, &gc_htable, &tmph));
		}
	}

	LLIST_TS_FOREACH(&recur_alist_p, i) {
		struct recur_apoint *rapt = LLIST_GET_DATA(i);
		if (rapt->note) {
			tmph.hash = rapt->note;
			mem_free(HTABLE_REMOVE(htp, &gc_htable, &tmph));
		}
	}

	LLIST_FOREACH(&recur_elist, i) {
		struct recur_event *rev = LLIST_GET_DATA(i);
		if (rev->note) {
			tmph.hash = rev->note;
			mem_free(HTABLE_REMOVE(htp, &gc_htable, &tmph));
		}
	}

	LLIST_FOREACH(&todolist, i) {
		struct todo *todo = LLIST_GET_DATA(i);
		if (todo->note) {
			tmph.hash = todo->note;
			mem_free(HTABLE_REMOVE(htp, &gc_htable, &tmph));
		}
	}

	/* Unlink unused note files. */
	HTABLE_FOREACH(hp, htp, &gc_htable) {
		asprintf(&notepath, "%s%s", path_notes, hp->hash);
		unlink(notepath);
		mem_free(notepath);
	}
}