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+/*
+ * Calcurse - text-based organizer
+ *
+ * Copyright (c) 2004-2012 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[BUFSIZ];
+ FILE *fp;
+
+ sha1_digest(str, sha1);
+ snprintf(notepath, BUFSIZ, "%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__);
+
+ return sha1;
+}
+
+/* Edit a note with an external editor. */
+void edit_note(char **note, const char *editor)
+{
+ char tmppath[BUFSIZ];
+ char *tmpext;
+ char notepath[BUFSIZ];
+ char *sha1 = mem_malloc(SHA1_DIGESTLEN * 2 + 1);
+ FILE *fp;
+
+ strncpy(tmppath, get_tempdir(), BUFSIZ);
+ strncat(tmppath, "/calcurse-note.", BUFSIZ - strlen(tmppath) - 1);
+ if ((tmpext = new_tempfile(tmppath, TMPEXTSIZ)) == NULL)
+ return;
+ strncat(tmppath, tmpext, BUFSIZ - strlen(tmppath) - 1);
+ mem_free(tmpext);
+
+ if (*note != NULL) {
+ snprintf(notepath, BUFSIZ, "%s%s", path_notes, *note);
+ io_file_cp(notepath, tmppath);
+ }
+
+ wins_launch_external(tmppath, editor);
+
+ if (io_file_is_empty(tmppath) > 0)
+ erase_note(note);
+ else if ((fp = fopen(tmppath, "r"))) {
+ sha1_stream(fp, sha1);
+ fclose(fp);
+ *note = sha1;
+
+ snprintf(notepath, BUFSIZ, "%s%s", path_notes, *note);
+ io_file_cp(tmppath, notepath);
+ }
+
+ unlink(tmppath);
+}
+
+/* View a note in an external pager. */
+void view_note(const char *note, const char *pager)
+{
+ char fullname[BUFSIZ];
+
+ if (note == NULL)
+ return;
+ snprintf(fullname, BUFSIZ, "%s%s", path_notes, note);
+ wins_launch_external(fullname, pager);
+}
+
+/* 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[BUFSIZ];
+
+ 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->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;
+ 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;
+ 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;
+ 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;
+ 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;
+ free(HTABLE_REMOVE(htp, &gc_htable, &tmph));
+ }
+ }
+
+ /* Unlink unused note files. */
+ HTABLE_FOREACH(hp, htp, &gc_htable) {
+ snprintf(notepath, BUFSIZ, "%s%s", path_notes, hp->hash);
+ unlink(notepath);
+ }
+}
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