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/* snac - A simple, minimalistic ActivityPub instance */
/* copyright (c) 2022 - 2026 grunfink et al. / MIT license */
/* BEGIN neighborhood */
/* neighborhood feed: feed of public posts from servers listed in server.json
under the "neighborhood" key. */
#include "xs.h"
#include "xs_set.h"
#include "snac.h"
xs_str *neighborhood_index_fn(void)
/* returns the filename of the neighborhood index */
{
return xs_fmt("%s/neighborhood.idx", srv_basedir);
}
int neighborhood_contains_actor(const char *actor)
/* 1 if the actor's host is in srv_config["neighborhood"], 0 otherwise */
{
if (!xs_is_string(actor) || *actor == '\0')
return 0;
const xs_list *neighborhoods = xs_dict_get(srv_config, "neighborhood");
if (xs_type(neighborhoods) != XSTYPE_LIST)
return 0;
/* extract host: third segment of "https://host/..." */
xs *parts = xs_split(actor, "/");
const char *raw_host = xs_list_get(parts, 2);
if (!xs_is_string(raw_host) || *raw_host == '\0')
return 0;
xs *host = xs_tolower_i(xs_dup(raw_host));
const xs_str *v;
int c = 0;
while (xs_list_next(neighborhoods, &v, &c)) {
if (!xs_is_string(v))
continue;
xs *candidate = xs_tolower_i(xs_dup(v));
if (strcmp(host, candidate) == 0)
return 1;
}
return 0;
}
void neighborhood_update_indexes(const char *id, const xs_dict *msg)
/* adds id to neighborhood.idx when the author's host is allowlisted and the post is public */
{
if (!xs_is_string(id) || msg == NULL)
return;
if (xs_type(xs_dict_get(srv_config, "neighborhood")) != XSTYPE_LIST)
return;
if (get_msg_visibility(msg) != SCOPE_PUBLIC)
return;
const char *atto = get_atto(msg);
if (!neighborhood_contains_actor(atto))
return;
xs *fn = neighborhood_index_fn();
if (!index_in(fn, id))
index_add(fn, id);
}
xs_list *timeline_neighborhood_list(int skip, int show)
/* returns the timeline for the neighborhood */
{
xs *idx = neighborhood_index_fn();
xs *lst = index_list_desc(idx, skip, show);
/* make the list unique */
xs_set rep;
xs_set_init(&rep);
const char *md5;
xs_list_foreach(lst, md5)
xs_set_add(&rep, md5);
return xs_set_result(&rep);
}
/* END neighborhood */
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