/* parse xml response and update data structures/return new data structure
* @param piano handle
* @param initialized request (expects responseData to be a NUL-terminated
* string)
*/
PianoReturn_t PianoResponse (PianoHandle_t *ph, PianoRequest_t *req) {
PianoReturn_t ret = PIANO_RET_ERR;
assert (ph != NULL);
assert (req != NULL);
switch (req->type) {
case PIANO_REQUEST_LOGIN: {
/* authenticate user */
PianoRequestDataLogin_t *reqData = req->data;
assert (req->responseData != NULL);
assert (reqData != NULL);
switch (reqData->step) {
case 0: {
char *cryptedTimestamp = NULL;
assert (req->responseData != NULL);
/* abusing parseNarrative; has same xml structure */
ret = PianoXmlParseNarrative (req->responseData, &cryptedTimestamp);
if (cryptedTimestamp != NULL) {
unsigned long timestamp = 0;
time_t realTimestamp = time (NULL);
char *decryptedTimestamp = NULL, *decryptedPos = NULL;
unsigned char i = 4;
if ((decryptedTimestamp = PianoDecryptString (cryptedTimestamp)) != NULL) {
decryptedPos = decryptedTimestamp;
/* skip four bytes garbage? at beginning */
while (i-- > 0 && *decryptedPos++ != '\0');
timestamp = strtoul (decryptedPos, NULL, 0);
ph->timeOffset = (int)realTimestamp - (int)timestamp;
free (decryptedTimestamp);
}
free (cryptedTimestamp);
}
ret = PIANO_RET_CONTINUE_REQUEST;
++reqData->step;
break;
}
case 1:
/* information exists when reauthenticating, destroy to
* avoid memleak */
if (ph->user.listenerId != NULL) {
PianoDestroyUserInfo (&ph->user);
}
ret = PianoXmlParseUserinfo (ph, req->responseData);
break;
}
break;
}
case PIANO_REQUEST_GET_STATIONS:
/* get stations */
assert (req->responseData != NULL);
ret = PianoXmlParseStations (ph, req->responseData);
break;
case PIANO_REQUEST_GET_PLAYLIST: {
/* get playlist, usually four songs */
PianoRequestDataGetPlaylist_t *reqData = req->data;
assert (req->responseData != NULL);
assert (reqData != NULL);
reqData->retPlaylist = NULL;
ret = PianoXmlParsePlaylist (ph, req->responseData,
&reqData->retPlaylist);
break;
}
case PIANO_REQUEST_RATE_SONG:
/* love/ban song */
assert (req->responseData != NULL);
ret = PianoXmlParseSimple (req->responseData);
if (ret == PIANO_RET_OK) {
PianoRequestDataRateSong_t *reqData = req->data;
reqData->song->rating = reqData->rating;
}
break;
case PIANO_REQUEST_ADD_FEEDBACK:
/* never ever use this directly, low-level call */
assert (0);
break;
case PIANO_REQUEST_MOVE_SONG: {
/* move song to different station */
PianoRequestDataMoveSong_t *reqData = req->data;
assert (req->responseData != NULL);
assert (reqData != NULL);
assert (reqData->step < 2);
ret = PianoXmlParseSimple (req->responseData);
if (ret == PIANO_RET_OK && reqData->step == 0) {
ret = PIANO_RET_CONTINUE_REQUEST;
++reqData->step;
}
break;
}
case PIANO_REQUEST_RENAME_STATION:
/* rename station and update PianoStation_t structure */
assert (req->responseData != NULL);
if ((ret = PianoXmlParseSimple (req->responseData)) == PIANO_RET_OK) {
PianoRequestDataRenameStation_t *reqData = req->data;
assert (reqData != NULL);
assert (reqData->station != NULL);
assert (reqData->newName != NULL);
free (reqData->station->name);
reqData->station->name = strdup (reqData->newName);
}
break;
case PIANO_REQUEST_DELETE_STATION:
/* delete station from server and station list */
assert (req->responseData != NULL);
if ((ret = PianoXmlParseSimple (req->responseData)) == PIANO_RET_OK) {
PianoStation_t *station = req->data;
assert (station != NULL);
/* delete station from local station list */
PianoStation_t *curStation = ph->stations, *lastStation = NULL;
while (curStation != NULL) {
if (curStation == station) {
if (lastStation != NULL) {
lastStation->next = curStation->next;
} else {
/* first station in list */
ph->stations = curStation->next;
}
PianoDestroyStation (curStation);
free (curStation);
break;
}
lastStation = curStation;
curStation = curStation->next;
}
}
break;
case PIANO_REQUEST_SEARCH: {
/* search artist/song */
PianoRequestDataSearch_t *reqData = req->data;
assert (req->responseData != NULL);
assert (reqData != NULL);
ret = PianoXmlParseSearch (req->responseData, &reqData->searchResult);
break;
}
case PIANO_REQUEST_CREATE_STATION: {
/* create station, insert new station into station list on success */
assert (req->responseData != NULL);
ret = PianoXmlParseCreateStation (ph, req->responseData);
break;
}
case PIANO_REQUEST_ADD_SEED: {
/* add seed to station, updates station structure */
PianoRequestDataAddSeed_t *reqData = req->data;
assert (req->responseData != NULL);
assert (reqData != NULL);
assert (reqData->station != NULL);
/* FIXME: update station data instead of replacing them */
ret = PianoXmlParseAddSeed (ph, req->responseData, reqData->station);
break;
}
case PIANO_REQUEST_ADD_TIRED_SONG:
case PIANO_REQUEST_SET_QUICKMIX:
case PIANO_REQUEST_BOOKMARK_SONG:
case PIANO_REQUEST_BOOKMARK_ARTIST:
case PIANO_REQUEST_DELETE_FEEDBACK:
assert (req->responseData != NULL);
ret = PianoXmlParseSimple (req->responseData);
break;
case PIANO_REQUEST_GET_GENRE_STATIONS:
/* get genre stations */
assert (req->responseData != NULL);
ret = PianoXmlParseGenreExplorer (ph, req->responseData);
break;
case PIANO_REQUEST_TRANSFORM_STATION: {
/* transform shared station into private and update isCreator flag */
PianoStation_t *station = req->data;
assert (req->responseData != NULL);
assert (station != NULL);
/* though this call returns a bunch of "new" data only this one is
* changed and important (at the moment) */
if ((ret = PianoXmlParseTranformStation (req->responseData)) ==
PIANO_RET_OK) {
station->isCreator = 1;
}
break;
}
case PIANO_REQUEST_EXPLAIN: {
/* explain why song was selected */
PianoRequestDataExplain_t *reqData = req->data;
assert (req->responseData != NULL);
assert (reqData != NULL);
ret = PianoXmlParseNarrative (req->responseData, &reqData->retExplain);
break;
}
case PIANO_REQUEST_GET_SEED_SUGGESTIONS: {
/* find similar artists */
PianoRequestDataGetSeedSuggestions_t *reqData = req->data;
assert (req->responseData != NULL);
assert (reqData != NULL);
ret = PianoXmlParseSeedSuggestions (req->responseData,
&reqData->searchResult);
break;
}
case PIANO_REQUEST_GET_STATION_INFO: {
/* get station information (seeds and feedback) */
PianoRequestDataGetStationInfo_t *reqData = req->data;
assert (req->responseData != NULL);
assert (reqData != NULL);
ret = PianoXmlParseGetStationInfo (req->responseData,
&reqData->info);
break;
}
case PIANO_REQUEST_DELETE_SEED: {
assert (req->responseData != NULL);
/* dummy function, checks for errors only */
ret = PianoXmlParseTranformStation (req->responseData);
}
}
return ret;
}
static void PianoXmlParsePlaylistCb (const char *key, const ezxml_t value,
void *data) {
PianoSong_t *song = data;
char *valueStr = PianoXmlGetNodeText (value);
if (strcmp ("audioURL", key) == 0) {
/* last 48 chars of audioUrl are encrypted, but they put the key
* into the door's lock... */
const char urlTailN = 48;
const size_t valueStrN = strlen (valueStr);
char *urlTail = NULL,
*urlTailCrypted = &valueStr[valueStrN - urlTailN];
/* don't try to decrypt if string is too short (=> invalid memory
* reads/writes) */
if (valueStrN > urlTailN &&
(urlTail = PianoDecryptString (urlTailCrypted)) != NULL) {
if ((song->audioUrl = calloc (valueStrN + 1,
sizeof (*song->audioUrl))) != NULL) {
memcpy (song->audioUrl, valueStr, valueStrN - urlTailN);
/* FIXME: the key seems to be broken... so ignore 8 x 0x08
* postfix; urlTailN/2 because the encrypted hex string is now
* decoded */
memcpy (&song->audioUrl[valueStrN - urlTailN], urlTail,
urlTailN/2 - 8);
}
free (urlTail);
}
} else if (strcmp ("artRadio", key) == 0) {
song->coverArt = strdup (valueStr);
} else if (strcmp ("artistSummary", key) == 0) {
song->artist = strdup (valueStr);
} else if (strcmp ("musicId", key) == 0) {
song->musicId = strdup (valueStr);
} else if (strcmp ("userSeed", key) == 0) {
song->userSeed = strdup (valueStr);
} else if (strcmp ("songTitle", key) == 0) {
song->title = strdup (valueStr);
} else if (strcmp ("rating", key) == 0) {
if (strcmp (valueStr, "1") == 0) {
song->rating = PIANO_RATE_LOVE;
} else {
song->rating = PIANO_RATE_NONE;
}
} else if (strcmp ("stationId", key) == 0) {
song->stationId = strdup (valueStr);
} else if (strcmp ("albumTitle", key) == 0) {
song->album = strdup (valueStr);
} else if (strcmp ("fileGain", key) == 0) {
song->fileGain = atof (valueStr);
} else if (strcmp ("audioEncoding", key) == 0) {
if (strcmp (valueStr, "aacplus") == 0) {
song->audioFormat = PIANO_AF_AACPLUS;
} else if (strcmp (valueStr, "mp3") == 0) {
song->audioFormat = PIANO_AF_MP3;
} else if (strcmp (valueStr, "mp3-hifi") == 0) {
song->audioFormat = PIANO_AF_MP3_HI;
}
} else if (strcmp ("artistMusicId", key) == 0) {
song->artistMusicId = strdup (valueStr);
} else if (strcmp ("testStrategy", key) == 0) {
song->testStrategy = atoi (valueStr);
} else if (strcmp ("songType", key) == 0) {
song->songType = atoi (valueStr);
}
}
