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json.c
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json.c
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#include <assert.h>
#include <jansson.h>
#include <libspotify/api.h>
#include <string.h>
#include "constants.h"
json_t *track_to_json(sp_track *track, json_t *object) {
char uri[kTrackLinkLength];
sp_link *link = sp_link_create_from_track(track, 0);
sp_link_as_string(link, uri, kTrackLinkLength);
sp_link_release(link);
json_object_set_new(object, "uri", json_string_nocheck(uri));
if (!sp_track_is_loaded(track))
return object;
const char *name = sp_track_name(track);
json_object_set_new(object, "title", json_string_nocheck(name));
return object;
}
json_t *playlist_to_json_set_collaborative(sp_playlist *playlist,
json_t *object) {
bool collaborative = sp_playlist_is_collaborative(playlist);
json_object_set_new(object, "collaborative",
collaborative ? json_true() : json_false());
return object;
}
json_t *playlist_to_json(sp_playlist *playlist, json_t *object) {
assert(sp_playlist_is_loaded(playlist));
// Owner
sp_user *owner = sp_playlist_owner(playlist);
const char *username = sp_user_display_name(owner);
sp_user_release(owner);
json_object_set_new_nocheck(object, "creator",
json_string_nocheck(username));
// URI
size_t playlist_uri_len = strlen("spotify:user:") + strlen(username) +
strlen(":playlist:") +
strlen("284on3DVWeAxWkgVuzZKGt");
char *playlist_uri = malloc(playlist_uri_len);
if (playlist_uri == NULL) {
return NULL;
}
sp_link *playlist_link = sp_link_create_from_playlist(playlist);
sp_link_as_string(playlist_link, playlist_uri, playlist_uri_len);
sp_link_release(playlist_link);
json_object_set_new(object, "uri",
json_string_nocheck(playlist_uri));
free(playlist_uri);
// Title
const char *title = sp_playlist_name(playlist);
json_object_set_new(object, "title",
json_string_nocheck(title));
// Collaborative
playlist_to_json_set_collaborative(playlist, object);
// Description
const char *description = sp_playlist_get_description(playlist);
if (description != NULL) {
json_object_set_new(object, "description",
json_string_nocheck(description));
}
// Tracks
json_t *tracks = json_array();
json_object_set_new(object, "tracks", tracks);
char track_uri[kTrackLinkLength];
for (int i = 0; i < sp_playlist_num_tracks(playlist); i++) {
sp_track *track = sp_playlist_track(playlist, i);
sp_link *track_link = sp_link_create_from_track(track, 0);
sp_link_as_string(track_link, track_uri, kTrackLinkLength);
json_array_append(tracks, json_string_nocheck(track_uri));
sp_link_release(track_link);
}
return object;
}