2022-09-19 23:41:30 +03:00
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/* snac - A simple, minimalistic ActivityPub instance */
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/* copyright (c) 2022 grunfink - MIT license */
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#include "xs.h"
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#include "xs_io.h"
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#include "xs_json.h"
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2022-09-20 10:39:28 +03:00
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#include "xs_openssl.h"
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2022-09-19 23:41:30 +03:00
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#include "snac.h"
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2022-09-20 00:33:11 +03:00
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#include <glob.h>
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2022-09-19 23:41:30 +03:00
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int srv_open(char *basedir)
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/* opens a server */
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{
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int ret = 0;
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xs *cfg_file = NULL;
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FILE *f;
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2022-09-20 10:39:28 +03:00
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d_char *error = NULL;
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2022-09-19 23:41:30 +03:00
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srv_basedir = xs_str_new(basedir);
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2022-09-20 10:39:28 +03:00
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if (xs_endswith(srv_basedir, "/"))
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srv_basedir = xs_crop(srv_basedir, 0, -1);
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2022-09-19 23:41:30 +03:00
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cfg_file = xs_fmt("%s/server.json", basedir);
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if ((f = fopen(cfg_file, "r")) == NULL)
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2022-09-20 10:39:28 +03:00
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error = xs_fmt("error opening '%s'", cfg_file);
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2022-09-19 23:41:30 +03:00
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else {
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xs *cfg_data;
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/* read full config file */
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cfg_data = xs_readall(f);
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/* parse */
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srv_config = xs_json_loads(cfg_data);
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if (srv_config == NULL)
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2022-09-20 10:39:28 +03:00
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error = xs_fmt("cannot parse '%s'", cfg_file);
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2022-09-19 23:41:30 +03:00
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else {
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char *host;
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char *prefix;
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char *dbglvl;
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host = xs_dict_get(srv_config, "host");
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prefix = xs_dict_get(srv_config, "prefix");
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dbglvl = xs_dict_get(srv_config, "dbglevel");
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if (host == NULL || prefix == NULL)
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2022-09-20 10:39:28 +03:00
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error = xs_str_new("cannot get server data");
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2022-09-19 23:41:30 +03:00
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else {
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srv_baseurl = xs_fmt("https://%s%s", host, prefix);
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dbglevel = (int) xs_number_get(dbglvl);
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if ((dbglvl = getenv("DEBUG")) != NULL) {
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dbglevel = atoi(dbglvl);
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error = xs_fmt("DEBUG level set to %d from environment", dbglevel);
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2022-09-19 23:41:30 +03:00
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}
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ret = 1;
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}
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}
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}
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2022-09-20 10:39:28 +03:00
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if (ret == 0 && error != NULL)
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srv_log(error);
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2022-09-19 23:41:30 +03:00
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return ret;
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}
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2022-09-20 00:33:11 +03:00
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void user_free(snac *snac)
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2022-09-19 23:41:30 +03:00
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/* frees a user snac */
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{
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free(snac->uid);
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free(snac->basedir);
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free(snac->config);
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free(snac->key);
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free(snac->actor);
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}
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2022-09-20 00:03:18 +03:00
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int user_open(snac *snac, char *uid)
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/* opens a user */
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{
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int ret = 0;
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memset(snac, '\0', sizeof(struct _snac));
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if (validate_uid(uid)) {
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xs *cfg_file;
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FILE *f;
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snac->uid = xs_str_new(uid);
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snac->basedir = xs_fmt("%s/user/%s", srv_basedir, uid);
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cfg_file = xs_fmt("%s/user.json", snac->basedir);
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if ((f = fopen(cfg_file, "r")) != NULL) {
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xs *cfg_data;
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/* read full config file */
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cfg_data = xs_readall(f);
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fclose(f);
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if ((snac->config = xs_json_loads(cfg_data)) != NULL) {
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xs *key_file = xs_fmt("%s/key.json", snac->basedir);
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if ((f = fopen(key_file, "r")) != NULL) {
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xs *key_data;
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key_data = xs_readall(f);
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fclose(f);
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if ((snac->key = xs_json_loads(key_data)) != NULL) {
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snac->actor = xs_fmt("%s/%s", srv_baseurl, uid);
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ret = 1;
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}
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else
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srv_log(xs_fmt("cannot parse '%s'", key_file));
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}
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else
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srv_log(xs_fmt("error opening '%s'", key_file));
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}
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else
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srv_log(xs_fmt("cannot parse '%s'", cfg_file));
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}
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else
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srv_log(xs_fmt("error opening '%s'", cfg_file));
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}
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else
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srv_log(xs_fmt("invalid user '%s'", uid));
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if (!ret)
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2022-09-20 00:33:11 +03:00
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user_free(snac);
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2022-09-19 23:41:30 +03:00
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return ret;
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}
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2022-09-20 00:33:11 +03:00
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d_char *user_list(void)
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/* returns the list of user ids */
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{
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d_char *list;
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xs *spec;
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glob_t globbuf;
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globbuf.gl_offs = 1;
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list = xs_list_new();
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spec = xs_fmt("%s/user/" "*", srv_basedir);
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2022-09-20 00:33:11 +03:00
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if (glob(spec, 0, NULL, &globbuf) == 0) {
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int n;
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char *p;
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for (n = 0; (p = globbuf.gl_pathv[n]) != NULL; n++) {
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if ((p = strrchr(p, '/')) != NULL)
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list = xs_list_append(list, p + 1);
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}
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}
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globfree(&globbuf);
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return list;
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}
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2022-09-20 10:39:28 +03:00
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float mtime(char *fn)
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/* returns the mtime of a file or directory, or 0.0 */
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{
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struct stat st;
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float r = 0.0;
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if (stat(fn, &st) != -1)
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r = (float)st.st_mtim.tv_sec;
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return r;
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}
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d_char *_follower_fn(snac *snac, char *actor)
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{
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xs *md5 = xs_md5_hex(actor, strlen(actor));
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return xs_fmt("%s/followers/%s.json", snac->basedir, md5);
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}
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int follower_add(snac *snac, char *actor, char *msg)
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/* adds a follower */
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{
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int ret = 201; /* created */
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xs *fn = _follower_fn(snac, actor);
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FILE *f;
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if ((f = fopen(fn, "w")) != NULL) {
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xs *j = xs_json_dumps_pp(msg, 4);
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fwrite(j, 1, strlen(j), f);
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fclose(f);
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}
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else
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ret = 500;
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snac_debug(snac, 2, xs_fmt("follower_add %s %s", actor, fn));
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return ret;
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}
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int follower_del(snac *snac, char *actor)
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/* deletes a follower */
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{
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xs *fn = _follower_fn(snac, actor);
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unlink(fn);
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snac_debug(snac, 2, xs_fmt("follower_del %s %s", actor, fn));
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return 200;
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}
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int follower_check(snac *snac, char *actor)
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/* checks if someone is a follower */
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{
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xs *fn = _follower_fn(snac, actor);
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return !!(mtime(fn) != 0.0);
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}
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d_char *follower_list(snac *snac)
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/* returns the list of followers */
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{
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d_char *list;
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xs *spec;
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glob_t globbuf;
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list = xs_list_new();
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spec = xs_fmt("%s/followers/" "*.json", snac->basedir);
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if (glob(spec, 0, NULL, &globbuf) == 0) {
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int n;
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2022-09-20 11:49:24 +03:00
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char *fn;
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2022-09-20 10:39:28 +03:00
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2022-09-20 11:49:24 +03:00
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for (n = 0; (fn = globbuf.gl_pathv[n]) != NULL; n++) {
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2022-09-20 10:39:28 +03:00
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FILE *f;
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2022-09-20 11:49:24 +03:00
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if ((f = fopen(fn, "r")) != NULL) {
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2022-09-20 10:48:13 +03:00
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xs *j = xs_readall(f);
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xs *o = xs_json_loads(j);
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if (o != NULL)
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list = xs_list_append(list, o);
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fclose(f);
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2022-09-20 10:39:28 +03:00
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}
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}
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}
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globfree(&globbuf);
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return list;
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}
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2022-09-20 11:02:00 +03:00
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2022-09-20 11:49:24 +03:00
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d_char *_timeline_find_fn(snac *snac, char *id)
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2022-09-20 11:02:00 +03:00
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/* returns the file name of a timeline entry by its id */
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{
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xs *md5 = xs_md5_hex(id, strlen(id));
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xs *spec = xs_fmt("%s/timeline/" "*-%s.json", snac->basedir, md5);
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glob_t globbuf;
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d_char *fn = NULL;
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if (glob(spec, 0, NULL, &globbuf) == 0 && globbuf.gl_matchc) {
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/* get just the first file */
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fn = xs_str_new(globbuf.gl_pathv[0]);
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}
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globfree(&globbuf);
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return fn;
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}
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2022-09-20 11:49:24 +03:00
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d_char *timeline_find(snac *snac, char *id)
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/* gets a message from the timeline by id */
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2022-09-20 11:02:00 +03:00
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{
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2022-09-20 11:49:24 +03:00
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xs *fn = _timeline_find_fn(snac, id);
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2022-09-20 11:02:00 +03:00
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xs *msg = NULL;
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if (fn != NULL) {
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FILE *f;
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if ((f = fopen(fn, "r")) != NULL) {
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xs *j = xs_readall(f);
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msg = xs_json_loads(j);
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fclose(f);
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}
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}
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return msg;
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}
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void timeline_del(snac *snac, char *id)
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/* deletes a message from the timeline */
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{
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2022-09-20 11:49:24 +03:00
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xs *fn = _timeline_find_fn(snac, id);
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2022-09-20 11:02:00 +03:00
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if (fn != NULL) {
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xs *lfn = NULL;
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unlink(fn);
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snac_debug(snac, 1, xs_fmt("timeline_del %s", id));
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/* try to delete also from the local timeline */
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lfn = xs_replace(fn, "/timeline/", "/local/");
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if (unlink(lfn) != -1)
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snac_debug(snac, 1, xs_fmt("timeline_del (local) %s", id));
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}
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}
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2022-09-20 11:49:24 +03:00
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d_char *timeline_get(snac *snac, char *fn)
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/* gets a timeline entry by file name */
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{
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d_char *d = NULL;
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FILE *f;
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if ((f = fopen(fn, "r")) != NULL) {
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xs *j = xs_readall(f);
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d = xs_json_loads(j);
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fclose(f);
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}
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return d;
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}
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d_char *timeline_list(snac *snac)
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/* returns a list of the timeline filenames */
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{
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d_char *list;
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xs *spec = xs_fmt("%s/timeline/" "*.json", snac->basedir);
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glob_t globbuf;
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int max;
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/* maximum number of items in the timeline */
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max = xs_number_get(xs_dict_get(srv_config, "max_timeline_entries"));
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list = xs_list_new();
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/* get the list in reverse order */
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if (glob(spec, 0, NULL, &globbuf) == 0) {
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int n;
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if (max > globbuf.gl_matchc)
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max = globbuf.gl_matchc;
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for (n = 0; n < max; n++) {
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char *fn = globbuf.gl_pathv[globbuf.gl_matchc - n - 1];
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|
|
|
|
|
list = xs_list_append(list, fn);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
globfree(&globbuf);
|
|
|
|
|
|
|
|
return list;
|
|
|
|
}
|
2022-09-20 12:16:24 +03:00
|
|
|
|
|
|
|
|
|
|
|
void timeline_add(snac *snac, char *id, char *msg, char *parent)
|
|
|
|
/* adds a message to the timeline */
|
|
|
|
{
|
|
|
|
xs *pfn = _timeline_find_fn(snac, id);
|
|
|
|
FILE *f;
|
|
|
|
|
|
|
|
if (pfn != NULL) {
|
|
|
|
snac_log(snac, xs_fmt("timeline_add refusing rewrite %s %s", id, pfn));
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* build the new filename */
|
2022-09-20 13:00:13 +03:00
|
|
|
xs *ntid = tid(0);
|
2022-09-20 12:16:24 +03:00
|
|
|
xs *md5 = xs_md5_hex(id, strlen(id));
|
|
|
|
xs *fn = xs_fmt("%s/timeline/%s-%s.json", snac->basedir, ntid, md5);
|
|
|
|
xs *md;
|
|
|
|
|
|
|
|
/* add metadata */
|
|
|
|
md = xs_json_loads("{"
|
|
|
|
"\"children\": [],"
|
|
|
|
"\"liked_by\": [],"
|
|
|
|
"\"announced_by\": [],"
|
|
|
|
"\"parent\": null"
|
|
|
|
"}");
|
|
|
|
|
|
|
|
if (parent != NULL)
|
|
|
|
md = xs_dict_set(md, "parent", parent);
|
|
|
|
|
|
|
|
msg = xs_dict_set(msg, "_snac", md);
|
|
|
|
|
|
|
|
if ((f = fopen(fn, "w")) != NULL) {
|
|
|
|
xs *j = xs_json_dumps_pp(msg, 4);
|
|
|
|
|
|
|
|
fwrite(j, strlen(j), 1, f);
|
|
|
|
fclose(f);
|
|
|
|
|
|
|
|
snac_debug(snac, 1, xs_fmt("timeline_add %s %s", id, fn));
|
|
|
|
}
|
|
|
|
|
|
|
|
/* generated by this user? link to local timeline */
|
|
|
|
if (xs_startswith(id, snac->actor)) {
|
|
|
|
xs *lfn = xs_replace(fn, "/timeline/", "/local/");
|
|
|
|
link(fn, lfn);
|
|
|
|
|
|
|
|
snac_debug(snac, 1, xs_fmt("timeline_add (local) %s %s", id, lfn));
|
|
|
|
}
|
|
|
|
}
|
2022-09-20 12:31:56 +03:00
|
|
|
|
|
|
|
|
|
|
|
d_char *_following_fn(snac *snac, char *actor)
|
|
|
|
{
|
|
|
|
xs *md5 = xs_md5_hex(actor, strlen(actor));
|
|
|
|
return xs_fmt("%s/following/%s.json", snac->basedir, md5);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
int following_add(snac *snac, char *actor, char *msg)
|
|
|
|
/* adds to the following list */
|
|
|
|
{
|
|
|
|
int ret = 201; /* created */
|
|
|
|
xs *fn = _following_fn(snac, actor);
|
|
|
|
FILE *f;
|
|
|
|
|
|
|
|
if ((f = fopen(fn, "w")) != NULL) {
|
|
|
|
xs *j = xs_json_dumps_pp(msg, 4);
|
|
|
|
|
|
|
|
fwrite(j, 1, strlen(j), f);
|
|
|
|
fclose(f);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
ret = 500;
|
|
|
|
|
|
|
|
snac_debug(snac, 2, xs_fmt("following_add %s %s", actor, fn));
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
int following_del(snac *snac, char *actor)
|
|
|
|
/* someone is no longer following us */
|
|
|
|
{
|
|
|
|
xs *fn = _following_fn(snac, actor);
|
|
|
|
|
|
|
|
unlink(fn);
|
|
|
|
|
|
|
|
snac_debug(snac, 2, xs_fmt("following_del %s %s", actor, fn));
|
|
|
|
|
|
|
|
return 200;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
int following_check(snac *snac, char *actor)
|
|
|
|
/* checks if someone is following us */
|
|
|
|
{
|
|
|
|
xs *fn = _following_fn(snac, actor);
|
|
|
|
|
|
|
|
return !!(mtime(fn) != 0.0);
|
|
|
|
}
|
2022-09-20 12:38:18 +03:00
|
|
|
|
|
|
|
|
|
|
|
d_char *_muted_fn(snac *snac, char *actor)
|
|
|
|
{
|
|
|
|
xs *md5 = xs_md5_hex(actor, strlen(actor));
|
|
|
|
return xs_fmt("%s/muted/%s.json", snac->basedir, md5);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void mute(snac *snac, char *actor)
|
|
|
|
/* mutes a moron */
|
|
|
|
{
|
|
|
|
xs *fn = _muted_fn(snac, actor);
|
|
|
|
FILE *f;
|
|
|
|
|
|
|
|
if ((f = fopen(fn, "w")) != NULL) {
|
|
|
|
fprintf(f, "%s\n", actor);
|
|
|
|
fclose(f);
|
|
|
|
|
|
|
|
snac_debug(snac, 2, xs_fmt("muted %s %s", actor, fn));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void unmute(snac *snac, char *actor)
|
|
|
|
/* actor is no longer a moron */
|
|
|
|
{
|
|
|
|
xs *fn = _muted_fn(snac, actor);
|
|
|
|
|
|
|
|
unlink(fn);
|
|
|
|
|
|
|
|
snac_debug(snac, 2, xs_fmt("unmuted %s %s", actor, fn));
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
int is_muted(snac *snac, char *actor)
|
|
|
|
/* check if someone is muted */
|
|
|
|
{
|
|
|
|
xs *fn = _muted_fn(snac, actor);
|
|
|
|
|
|
|
|
return !!(mtime(fn) != 0.0);
|
|
|
|
}
|
2022-09-20 13:00:13 +03:00
|
|
|
|
|
|
|
|
|
|
|
void enqueue(snac *snac, char *actor, char *msg, int retries)
|
|
|
|
/* enqueues a message for an actor */
|
|
|
|
{
|
|
|
|
if (strcmp(actor, snac->actor) == 0) {
|
|
|
|
snac_debug(snac, 1, xs_str_new("enqueue refused to myself"));
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
int qrt = xs_number_get(xs_dict_get(srv_config, "query_retry_minutes"));
|
|
|
|
xs *ntid = tid(retries * 60 * qrt);
|
|
|
|
xs *fn = xs_fmt("%s/queue/%s.json", snac->basedir, ntid);
|
|
|
|
xs *tfn = xs_str_cat(fn, ".tmp");
|
|
|
|
FILE *f;
|
|
|
|
|
|
|
|
if ((f = fopen(tfn, "w")) != NULL) {
|
|
|
|
xs *qmsg = xs_dict_new();
|
|
|
|
xs *rn = xs_number_new(retries);
|
|
|
|
xs *j;
|
|
|
|
|
|
|
|
qmsg = xs_dict_append(qmsg, "actor", actor);
|
|
|
|
qmsg = xs_dict_append(qmsg, "object", msg);
|
|
|
|
qmsg = xs_dict_append(qmsg, "retries", rn);
|
|
|
|
|
|
|
|
j = xs_json_dumps_pp(qmsg, 4);
|
|
|
|
|
|
|
|
fwrite(j, strlen(j), 1, f);
|
|
|
|
fclose(f);
|
|
|
|
|
|
|
|
rename(tfn, fn);
|
|
|
|
|
|
|
|
snac_debug(snac, 2, xs_fmt("enqueue %s %s %d", actor, fn, retries));
|
|
|
|
}
|
|
|
|
}
|