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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <json.h>
#include <curl/curl.h>
#define USER "user"
#define KEY "key"
static CURL *curl;
struct track {
char *artist, *album, *title, *user_play_count, *top_tag;
};
void track_free(struct track *t)
{
free(t->artist);
free(t->album);
free(t->title);
free(t->user_play_count);
free(t->top_tag);
free(t);
}
struct json_builder {
json_object *obj;
json_tokener *tok;
};
size_t parse_cb(char *ptr, size_t size, size_t nmemb, struct json_builder *jb)
{
jb->obj = json_tokener_parse_ex(jb->tok, ptr, nmemb);
return nmemb;
}
json_object *perform_json_curl(char *uri)
{
struct json_builder jb = {0, json_tokener_new()};
curl_easy_setopt(curl, CURLOPT_URL, uri);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, parse_cb);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &jb);
CURLcode res = curl_easy_perform(curl);
if (res != CURLE_OK) exit(1);
json_tokener_free(jb.tok);
return jb.obj;
}
json_object *fetch_recent_tracks(const char *user)
{
char uri[2048];
snprintf(
uri, 2048,
"http://ws.audioscrobbler.com/2.0/?method=user.getrecenttracks&"
"api_key="KEY"&user=%s&format=json",
user);
return perform_json_curl(uri);
}
json_object *fetch_track_info(const char *user, char *artist, char *title)
{
char *c_artist = curl_easy_escape(curl, artist, 0);
char *c_title = curl_easy_escape(curl, title, 0);
char uri[2048];
snprintf(
uri, 2048,
"http://ws.audioscrobbler.com/2.0/?method=track.getInfo&"
"api_key="KEY"&user=%s&artist=%s&track=%s&format=json",
user, c_artist, c_title);
curl_free(c_artist);
curl_free(c_title);
return perform_json_curl(uri);
}
const char *get_artist(json_object *obj)
{
json_object *tmp;
json_object_object_get_ex(obj, "artist", &tmp);
json_object_object_get_ex(tmp, "#text", &tmp);
return json_object_get_string(tmp);
}
const char *get_album(json_object *obj)
{
json_object *tmp;
json_object_object_get_ex(obj, "album", &tmp);
json_object_object_get_ex(tmp, "#text", &tmp);
return json_object_get_string(tmp);
}
const char *get_title(json_object *obj)
{
json_object *tmp;
json_object_object_get_ex(obj, "name", &tmp);
return json_object_get_string(tmp);
}
struct track *get_recent_track(const char *user)
{
json_object *tmp, *json = fetch_recent_tracks(user);
json_object_object_get_ex(json, "recenttracks", &tmp);
json_object_object_get_ex(tmp, "track", &tmp);
tmp = json_object_array_get_idx(tmp, 0);
struct track *t = calloc(1, sizeof(*t));
const char *str;
if ((str = get_artist(tmp)))
t->artist = strdup(str);
if ((str = get_album(tmp)))
t->album = strdup(str);
if ((str = get_title(tmp)))
t->title = strdup(str);
json_object_put(json);
return t;
}
const char *get_user_play_count(json_object *obj)
{
json_object *tmp;
json_object_object_get_ex(obj, "userplaycount", &tmp);
return json_object_get_string(tmp);
}
const char *get_top_tag(json_object *obj)
{
json_object *tmp;
json_object_object_get_ex(obj, "toptags", &tmp);
json_object_object_get_ex(tmp, "tag", &tmp);
if (json_object_get_type(tmp) == json_type_array)
tmp = json_object_array_get_idx(tmp, 0);
json_object_object_get_ex(tmp, "name", &tmp);
return json_object_get_string(tmp);
}
void add_track_info(struct track *t, const char *user)
{
if (!t->artist || !t->title) return;
json_object *tmp, *json = fetch_track_info(user, t->artist, t->title);
json_object_object_get_ex(json, "track", &tmp);
const char *str;
if ((str = get_user_play_count(tmp)))
t->user_play_count = strdup(str);
if ((str = get_top_tag(tmp)))
t->top_tag = strdup(str);
json_object_put(json);
}
int main(int argc, char *argv[])
{
curl_global_init(CURL_GLOBAL_DEFAULT);
curl = curl_easy_init();
if (!curl) exit(1);
const char *user = (argc > 1) ? argv[1] : USER;
struct track *t = get_recent_track(user);
add_track_info(t, user);
printf("np");
if (argc > 1)
printf(" (%s)", user);
printf(": %s - ", t->artist);
if (t->album && strlen(t->album) > 0)
printf("%s - ", t->album);
printf("%s (plays: %s)", t->title, t->user_play_count ?: "0");
if (t->top_tag)
printf(" (%s)", t->top_tag);
printf("\n");
track_free(t);
curl_easy_cleanup(curl);
curl_global_cleanup();
return 0;
}
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