1 /* Blerg is (C) 2011 The Dominion of Awesome, and is distributed under a
2 * BSD-style license. Please see the COPYING file for details.
17 #include "configuration.h"
20 int tag_scan(const char *author, const char *data, int len, uint64_t record) {
21 char *taglist[MAX_TAGS_PER_RECORD];
26 for (i = 0; i < len; i++) {
28 if (WHITESPACE(last_char) && (data[i] == '#' || data[i] == '@')) {
29 if (n_tags == MAX_TAGS_PER_RECORD) {
30 fprintf(stderr, "Too many tags in message\n");
35 while (i < len && VALID_CHAR(data[i]) && (i - start < MAX_TAG_LENGTH)) {
38 if (start - i == 0) continue;
39 char *tag = calloc(1, MAX_TAG_LENGTH + 2);
40 memcpy(tag, &data[begin], i - begin);
41 for (j = 0; j < n_tags; j++) {
42 if (!strncmp(tag, taglist[j], MAX_TAG_LENGTH)) {
43 // We already have this tag. Start over.
45 last_char = data[i-1];
49 taglist[n_tags] = tag;
51 last_char = data[i-1];
52 // We goto here so i doesn't get incremented
58 for (i = 0; i < n_tags; i++) {
59 tag_add(author, taglist[i], record);
65 int tag_add(const char *author, const char *tag, uint64_t record) {
66 char filename[FILENAME_MAX];
68 const char *tagval = tag + 1;
70 memset(t.author, 0, 32);
71 strncpy(t.author, author, 32);
76 snprintf(filename, FILENAME_MAX, "%s/%s", blergconf.hash_tags_path, tagval);
79 snprintf(filename, FILENAME_MAX, "%s/%s", blergconf.ref_tags_path, tagval);
82 fprintf(stderr, "Invalid tag type: %s\n", tag);
86 int tag_fd = open(filename, O_WRONLY | O_APPEND | O_CREAT, 0600);
87 flock(tag_fd, LOCK_EX);
89 perror("Could not open tag file");
92 int n = write(tag_fd, &t, sizeof(struct blergref));
93 if (n < sizeof(struct blergref)) {
94 perror("Could not write new tag");
97 flock(tag_fd, LOCK_UN);
100 /* Set a flag for mentioned users */
101 if (tag[0] == '@' && blerg_exists(tagval)) {
102 struct blerg *b = blerg_open(tagval);
104 blerg_set_status(b, BLERGSTATUS_MENTIONED, 1);
112 struct blergref * tag_list(const char *tag, uint64_t offset, int *count, int direction) {
113 char filename[FILENAME_MAX];
115 struct blergref *taglist;
116 struct blergref *retlist;
117 uint64_t n_tag_records;
119 if (!valid_tag_name(tag + 1))
122 if (!(direction == 1 || direction == -1)) {
123 fprintf(stderr, "Invalid direction: %d\n", direction);
129 snprintf(filename, FILENAME_MAX, "%s/%s", blergconf.hash_tags_path, tag + 1);
132 snprintf(filename, FILENAME_MAX, "%s/%s", blergconf.ref_tags_path, tag + 1);
135 fprintf(stderr, "Invalid tag type: %s\n", tag);
139 int tag_fd = open(filename, O_RDONLY, 0600);
141 perror("Could not open tag file");
142 goto tag_list_open_failed;
146 if (st.st_size == 0) {
147 goto tag_list_map_failed;
149 n_tag_records = st.st_size / sizeof(struct blergref);
150 if (*count > n_tag_records - offset)
151 *count = n_tag_records - offset;
152 if (offset > n_tag_records) {
153 fprintf(stderr, "Cannot access tag record beyond end\n");
154 goto tag_list_map_failed;
157 taglist = (struct blergref *) mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, tag_fd, 0);
158 if (taglist == MAP_FAILED) {
159 perror("Could not mmap tag file");
160 goto tag_list_map_failed;
162 retlist = (struct blergref *) malloc(sizeof(struct blergref) * *count);
163 if (retlist == NULL) {
164 perror("Could not allocate memory for tag list");
165 goto tag_list_malloc_failed;
169 memcpy(retlist, taglist + offset, sizeof(struct blergref) * *count);
172 memcpy(retlist, taglist + (n_tag_records - *count - offset), sizeof(struct blergref) * *count);
176 munmap(taglist, st.st_size);
180 tag_list_malloc_failed:
181 munmap(taglist, st.st_size);
184 tag_list_open_failed:
189 int tag_exists(const char *tag) {
190 char filename[FILENAME_MAX];
192 if (!valid_tag_name(tag + 1))
195 if (!(tag[0] == '@' || tag[0] == '#')) {
196 fprintf(stderr, "Invalid tag: %s\n", tag);
202 snprintf(filename, FILENAME_MAX, "%s/%s", blergconf.hash_tags_path, tag + 1);
205 snprintf(filename, FILENAME_MAX, "%s/%s", blergconf.ref_tags_path, tag + 1);
208 fprintf(stderr, "Invalid tag type: %s\n", tag);
211 if (access(filename, F_OK) == -1)