piano: Split piano.c into request.c and response.c

1 files changed, 1 insertions, 1095 deletions

diff --git a/src/libpiano/piano.c b/src/libpiano/piano.c
index 0ac96b6..f9dfa51 100644
--- a/src/libpiano/piano.c
+++ b/src/libpiano/piano.c
@@ -29,22 +29,13 @@ THE SOFTWARE.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#include <time.h>
 #include <assert.h>
 #include <stdint.h>
-#include <json.h>
-
-/* needed for urlencode */
-#include <waitress.h>
 
 #include "piano_private.h"
 #include "piano.h"
-#include "crypt.h"
 #include "config.h"
 
-#define PIANO_RPC_PATH "/services/json/?"
-#define PIANO_SEND_BUFFER_SIZE 10000
-
 /*	initialize piano handle
  *	@param piano handle
  *	@return nothing
@@ -154,7 +145,7 @@ static void PianoDestroyGenres (PianoGenre_t *genres) {
 
 /*	destroy user information
  */
-static void PianoDestroyUserInfo (PianoUserInfo_t *user) {
+void PianoDestroyUserInfo (PianoUserInfo_t *user) {
 	free (user->authToken);
 	free (user->listenerId);
 }
@@ -212,1091 +203,6 @@ static const char *PianoAudioFormatToString (PianoAudioFormat_t format) {
 	}
 }
 
-/*	prepare piano request (initializes request type, urlpath and postData)
- *	@param piano handle
- *	@param request structure
- *	@param request type
- */
-PianoReturn_t PianoRequest (PianoHandle_t *ph, PianoRequest_t *req,
-		PianoRequestType_t type) {
-	const char *jsonSendBuf;
-	const char *method = NULL;
-	json_object *j = json_object_new_object ();
-	/* corrected timestamp */
-	time_t timestamp = time (NULL) - ph->timeOffset;
-	bool encrypted = true;
-
-	assert (ph != NULL);
-	assert (req != NULL);
-
-	req->type = type;
-	/* no tls by default */
-	req->secure = false;
-
-	switch (req->type) {
-		case PIANO_REQUEST_LOGIN: {
-			/* authenticate user */
-			PianoRequestDataLogin_t *logindata = req->data;
-
-			assert (logindata != NULL);
-
-			switch (logindata->step) {
-				case 0:
-					encrypted = false;
-					req->secure = true;
-
-					json_object_object_add (j, "username",
-							json_object_new_string ("android"));
-					json_object_object_add (j, "password",
-							json_object_new_string ("AC7IBG09A3DTSYM4R41UJWL07VLN8JI7"));
-					json_object_object_add (j, "deviceModel",
-							json_object_new_string ("android-generic"));
-					json_object_object_add (j, "version",
-							json_object_new_string ("5"));
-					json_object_object_add (j, "includeUrls",
-							json_object_new_boolean (true));
-					snprintf (req->urlPath, sizeof (req->urlPath),
-							PIANO_RPC_PATH "method=auth.partnerLogin");
-					break;
-
-				case 1: {
-					char *urlencAuthToken;
-
-					req->secure = true;
-
-					json_object_object_add (j, "loginType",
-							json_object_new_string ("user"));
-					json_object_object_add (j, "username",
-							json_object_new_string (logindata->user));
-					json_object_object_add (j, "password",
-							json_object_new_string (logindata->password));
-					json_object_object_add (j, "partnerAuthToken",
-							json_object_new_string (ph->partnerAuthToken));
-					json_object_object_add (j, "syncTime",
-							json_object_new_int (timestamp));
-
-					urlencAuthToken = WaitressUrlEncode (ph->partnerAuthToken);
-					assert (urlencAuthToken != NULL);
-					snprintf (req->urlPath, sizeof (req->urlPath),
-							PIANO_RPC_PATH "method=auth.userLogin&"
-							"auth_token=%s&partner_id=%i", urlencAuthToken,
-							ph->partnerId);
-					free (urlencAuthToken);
-
-					break;
-				}
-			}
-			break;
-		}
-
-		case PIANO_REQUEST_GET_STATIONS: {
-			/* get stations, user must be authenticated */
-			assert (ph->user.listenerId != NULL);
-			method = "user.getStationList";
-			break;
-		}
-
-		case PIANO_REQUEST_GET_PLAYLIST: {
-			/* get playlist for specified station */
-			PianoRequestDataGetPlaylist_t *reqData = req->data;
-
-			assert (reqData != NULL);
-			assert (reqData->station != NULL);
-			assert (reqData->station->id != NULL);
-			assert (reqData->format != PIANO_AF_UNKNOWN);
-
-			req->secure = true;
-
-			json_object_object_add (j, "stationToken",
-					json_object_new_string (reqData->station->id));
-
-			method = "station.getPlaylist";
-			break;
-		}
-
-		case PIANO_REQUEST_ADD_FEEDBACK: {
-			/* low-level, don't use directly (see _RATE_SONG and _MOVE_SONG) */
-			PianoRequestDataAddFeedback_t *reqData = req->data;
-			
-			assert (reqData != NULL);
-			assert (reqData->trackToken != NULL);
-			assert (reqData->rating != PIANO_RATE_NONE);
-
-			json_object_object_add (j, "trackToken",
-					json_object_new_string (reqData->trackToken));
-			json_object_object_add (j, "isPositive",
-					json_object_new_boolean (reqData->rating == PIANO_RATE_LOVE));
-
-			method = "station.addFeedback";
-			break;
-		}
-
-		case PIANO_REQUEST_RENAME_STATION: {
-			PianoRequestDataRenameStation_t *reqData = req->data;
-
-			assert (reqData != NULL);
-			assert (reqData->station != NULL);
-			assert (reqData->newName != NULL);
-
-			json_object_object_add (j, "stationToken",
-					json_object_new_string (reqData->station->id));
-			json_object_object_add (j, "stationName",
-					json_object_new_string (reqData->newName));
-
-			method = "station.renameStation";
-			break;
-		}
-
-		case PIANO_REQUEST_DELETE_STATION: {
-			/* delete station */
-			PianoStation_t *station = req->data;
-
-			assert (station != NULL);
-			assert (station->id != NULL);
-
-			json_object_object_add (j, "stationToken",
-					json_object_new_string (station->id));
-
-			method = "station.deleteStation";
-			break;
-		}
-
-		case PIANO_REQUEST_SEARCH: {
-			/* search for artist/song title */
-			PianoRequestDataSearch_t *reqData = req->data;
-
-			assert (reqData != NULL);
-			assert (reqData->searchStr != NULL);
-
-			json_object_object_add (j, "searchText",
-					json_object_new_string (reqData->searchStr));
-
-			method = "music.search";
-			break;
-		}
-
-		case PIANO_REQUEST_CREATE_STATION: {
-			/* create new station from specified musicid (type=mi, get one by
-			 * performing a search) or shared station id (type=sh) */
-			PianoRequestDataCreateStation_t *reqData = req->data;
-
-			assert (reqData != NULL);
-			assert (reqData->id != NULL);
-
-			json_object_object_add (j, "musicToken",
-					json_object_new_string (reqData->id));
-
-			method = "station.createStation";
-			break;
-		}
-
-		case PIANO_REQUEST_ADD_SEED: {
-			/* add another seed to specified station */
-			PianoRequestDataAddSeed_t *reqData = req->data;
-
-			assert (reqData != NULL);
-			assert (reqData->station != NULL);
-			assert (reqData->musicId != NULL);
-
-			json_object_object_add (j, "musicToken",
-					json_object_new_string (reqData->musicId));
-			json_object_object_add (j, "stationToken",
-					json_object_new_string (reqData->station->id));
-
-			method = "station.addMusic";
-			break;
-		}
-
-		case PIANO_REQUEST_ADD_TIRED_SONG: {
-			/* ban song for a month from all stations */
-			PianoSong_t *song = req->data;
-
-			assert (song != NULL);
-
-			json_object_object_add (j, "trackToken",
-					json_object_new_string (song->trackToken));
-
-			method = "user.sleepSong";
-			break;
-		}
-
-		case PIANO_REQUEST_SET_QUICKMIX: {
-			/* select stations included in quickmix (see useQuickMix flag of
-			 * PianoStation_t) */
-			PianoStation_t *curStation = ph->stations;
-			json_object *a = json_object_new_array ();
-
-			while (curStation != NULL) {
-				/* quick mix can't contain itself */
-				if (curStation->useQuickMix && !curStation->isQuickMix) {
-					json_object_array_add (a,
-							json_object_new_string (curStation->id));
-				}
-
-				curStation = curStation->next;
-			}
-
-			json_object_object_add (j, "quickMixStationIds", a);
-
-			method = "user.setQuickMix";
-			break;
-		}
-
-		case PIANO_REQUEST_GET_GENRE_STATIONS: {
-			/* receive list of pandora's genre stations */
-			method = "station.getGenreStations";
-			break;
-		}
-
-		case PIANO_REQUEST_TRANSFORM_STATION: {
-			/* transform shared station into private */
-			PianoStation_t *station = req->data;
-
-			assert (station != NULL);
-
-			json_object_object_add (j, "stationToken",
-					json_object_new_string (station->id));
-
-			method = "station.transformSharedStation";
-			break;
-		}
-
-		case PIANO_REQUEST_EXPLAIN: {
-			/* explain why particular song was played */
-			PianoRequestDataExplain_t *reqData = req->data;
-
-			assert (reqData != NULL);
-			assert (reqData->song != NULL);
-
-			json_object_object_add (j, "trackToken",
-					json_object_new_string (reqData->song->trackToken));
-
-			method = "track.explainTrack";
-			break;
-		}
-
-		case PIANO_REQUEST_GET_SEED_SUGGESTIONS: {
-#if 0
-			/* find similar artists */
-			PianoRequestDataGetSeedSuggestions_t *reqData = req->data;
-
-			assert (reqData != NULL);
-			assert (reqData->musicId != NULL);
-			assert (reqData->max != 0);
-
-			snprintf (xmlSendBuf, sizeof (xmlSendBuf), "<?xml version=\"1.0\"?>"
-					"<methodCall><methodName>music.getSeedSuggestions</methodName>"
-					"<params><param><value><int>%lu</int></value></param>"
-					/* auth token */
-					"<param><value><string>%s</string></value></param>"
-					/* station id */
-					"<param><value><string>%s</string></value></param>"
-					/* seed music id */
-					"<param><value><string>%s</string></value></param>"
-					/* max */
-					"<param><value><int>%u</int></value></param>"
-					"</params></methodCall>", (unsigned long) timestamp,
-					ph->user.authToken, reqData->station->id, reqData->musicId,
-					reqData->max);
-			snprintf (req->urlPath, sizeof (req->urlPath), PIANO_RPC_PATH
-					"rid=%s&lid=%s&method=getSeedSuggestions&arg1=%s&arg2=%u",
-					ph->routeId, ph->user.listenerId, reqData->musicId, reqData->max);
-#endif
-			break;
-		}
-
-		case PIANO_REQUEST_BOOKMARK_SONG: {
-			/* bookmark song */
-			PianoSong_t *song = req->data;
-
-			assert (song != NULL);
-
-			json_object_object_add (j, "trackToken",
-					json_object_new_string (song->trackToken));
-
-			method = "bookmark.addSongBookmark";
-			break;
-		}
-
-		case PIANO_REQUEST_BOOKMARK_ARTIST: {
-			/* bookmark artist */
-			PianoSong_t *song = req->data;
-
-			assert (song != NULL);
-
-			json_object_object_add (j, "trackToken",
-					json_object_new_string (song->trackToken));
-
-			method = "bookmark.addArtistBookmark";
-			break;
-		}
-
-		case PIANO_REQUEST_GET_STATION_INFO: {
-			/* get station information (seeds and feedback) */
-			PianoRequestDataGetStationInfo_t *reqData = req->data;
-
-			assert (reqData != NULL);
-			assert (reqData->station != NULL);
-
-			json_object_object_add (j, "stationToken",
-					json_object_new_string (reqData->station->id));
-			json_object_object_add (j, "includeExtendedAttributes",
-					json_object_new_boolean (true));
-
-			method = "station.getStation";
-			break;
-		}
-
-		case PIANO_REQUEST_DELETE_FEEDBACK: {
-			PianoSong_t *song = req->data;
-
-			assert (song != NULL);
-
-			json_object_object_add (j, "feedbackId",
-					json_object_new_string (song->feedbackId));
-
-			method = "station.deleteFeedback";
-			break;
-		}
-
-		case PIANO_REQUEST_DELETE_SEED: {
-			PianoRequestDataDeleteSeed_t *reqData = req->data;
-			char *seedId = NULL;
-
-			assert (reqData != NULL);
-			assert (reqData->song != NULL || reqData->artist != NULL ||
-					reqData->station != NULL);
-
-			if (reqData->song != NULL) {
-				seedId = reqData->song->seedId;
-			} else if (reqData->artist != NULL) {
-				seedId = reqData->artist->seedId;
-			} else if (reqData->station != NULL) {
-				seedId = reqData->station->seedId;
-			}
-
-			assert (seedId != NULL);
-
-			json_object_object_add (j, "seedId",
-					json_object_new_string (seedId));
-
-			method = "station.deleteMusic";
-			break;
-		}
-
-		/* "high-level" wrapper */
-		case PIANO_REQUEST_RATE_SONG: {
-			/* love/ban song */
-			PianoRequestDataRateSong_t *reqData = req->data;
-			PianoReturn_t pRet;
-
-			assert (reqData != NULL);
-			assert (reqData->song != NULL);
-			assert (reqData->rating != PIANO_RATE_NONE);
-
-			PianoRequestDataAddFeedback_t transformedReqData;
-			transformedReqData.stationId = reqData->song->stationId;
-			transformedReqData.trackToken = reqData->song->trackToken;
-			transformedReqData.rating = reqData->rating;
-			req->data = &transformedReqData;
-
-			/* create request data (url, post data) */
-			pRet = PianoRequest (ph, req, PIANO_REQUEST_ADD_FEEDBACK);
-			/* and reset request type/data */
-			req->type = PIANO_REQUEST_RATE_SONG;
-			req->data = reqData;
-
-			return pRet;
-			break;
-		}
-
-		case PIANO_REQUEST_MOVE_SONG: {
-			/* move song to a different station, needs two requests */
-			PianoRequestDataMoveSong_t *reqData = req->data;
-			PianoRequestDataAddFeedback_t transformedReqData;
-			PianoReturn_t pRet;
-
-			assert (reqData != NULL);
-			assert (reqData->song != NULL);
-			assert (reqData->from != NULL);
-			assert (reqData->to != NULL);
-			assert (reqData->step < 2);
-
-			transformedReqData.trackToken = reqData->song->trackToken;
-			req->data = &transformedReqData;
-
-			switch (reqData->step) {
-				case 0:
-					transformedReqData.stationId = reqData->from->id;
-					transformedReqData.rating = PIANO_RATE_BAN;
-					break;
-
-				case 1:
-					transformedReqData.stationId = reqData->to->id;
-					transformedReqData.rating = PIANO_RATE_LOVE;
-					break;
-			}
-
-			/* create request data (url, post data) */
-			pRet = PianoRequest (ph, req, PIANO_REQUEST_ADD_FEEDBACK);
-			/* and reset request type/data */
-			req->type = PIANO_REQUEST_MOVE_SONG;
-			req->data = reqData;
-
-			return pRet;
-			break;
-		}
-	}
-
-	/* standard parameter */
-	if (method != NULL) {
-		char *urlencAuthToken;
-
-		assert (ph->user.authToken != NULL);
-
-		urlencAuthToken = WaitressUrlEncode (ph->user.authToken);
-		assert (urlencAuthToken != NULL);
-
-		snprintf (req->urlPath, sizeof (req->urlPath), PIANO_RPC_PATH
-				"method=%s&auth_token=%s&partner_id=%i&user_id=%s", method,
-				urlencAuthToken, ph->partnerId, ph->user.listenerId);
-
-		free (urlencAuthToken);
-
-		json_object_object_add (j, "userAuthToken",
-				json_object_new_string (ph->user.authToken));
-		json_object_object_add (j, "syncTime",
-				json_object_new_int (timestamp));
-	}
-
-	/* json to string */
-	jsonSendBuf = json_object_to_json_string (j);
-	if (encrypted) {
-		if ((req->postData = PianoEncryptString (jsonSendBuf)) == NULL) {
-			return PIANO_RET_OUT_OF_MEMORY;
-		}
-	} else {
-		req->postData = strdup (jsonSendBuf);
-	}
-	json_object_put (j);
-
-	return PIANO_RET_OK;
-}
-
-static char *PianoJsonStrdup (json_object *j, const char *key) {
-	return strdup (json_object_get_string (json_object_object_get (j, key)));
-}
-
-static void PianoJsonParseStation (json_object *j, PianoStation_t *s) {
-	s->name = PianoJsonStrdup (j, "stationName");
-	s->id = PianoJsonStrdup (j, "stationToken");
-	s->isCreator = !json_object_get_boolean (json_object_object_get (j,
-			"isShared"));
-	s->isQuickMix = json_object_get_boolean (json_object_object_get (j,
-			"isQuickMix"));
-}
-
-/*	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_OK;
-	json_object *j, *result, *status;
-
-	assert (ph != NULL);
-	assert (req != NULL);
-
-	j = json_tokener_parse (req->responseData);
-
-	status = json_object_object_get (j, "stat");
-	if (status == NULL) {
-		json_object_put (j);
-		return PIANO_RET_INVALID_RESPONSE;
-	}
-
-	/* error handling */
-	if (strcmp (json_object_get_string (status), "ok") != 0) {
-		json_object *code = json_object_object_get (j, "code");
-		if (code == NULL) {
-			ret = PIANO_RET_INVALID_RESPONSE;
-		} else {
-			ret = json_object_get_int (code)+PIANO_RET_OFFSET;
-		}
-
-		json_object_put (j);
-		return ret;
-	}
-
-	result = json_object_object_get (j, "result");
-
-	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: {
-					/* decrypt timestamp */
-					const char *cryptedTimestamp = json_object_get_string (
-							json_object_object_get (result, "syncTime"));
-					unsigned long timestamp = 0;
-					const time_t realTimestamp = time (NULL);
-					char *decryptedTimestamp = NULL;
-					size_t decryptedSize;
-
-					ret = PIANO_RET_ERR;
-					if ((decryptedTimestamp = PianoDecryptString (cryptedTimestamp,
-							&decryptedSize)) != NULL && decryptedSize > 4) {
-						/* skip four bytes garbage(?) at beginning */
-						timestamp = strtoul (decryptedTimestamp+4, NULL, 0);
-						ph->timeOffset = realTimestamp - timestamp;
-						ret = PIANO_RET_CONTINUE_REQUEST;
-					}
-					free (decryptedTimestamp);
-					/* get auth token */
-					ph->partnerAuthToken = PianoJsonStrdup (result,
-							"partnerAuthToken");
-					ph->partnerId = json_object_get_int (
-							json_object_object_get (result, "partnerId"));
-					++reqData->step;
-					break;
-				}
-
-				case 1:
-					/* information exists when reauthenticating, destroy to
-					 * avoid memleak */
-					if (ph->user.listenerId != NULL) {
-						PianoDestroyUserInfo (&ph->user);
-					}
-					ph->user.listenerId = PianoJsonStrdup (result, "userId");
-					ph->user.authToken = PianoJsonStrdup (result,
-							"userAuthToken");
-					break;
-			}
-			break;
-		}
-
-		case PIANO_REQUEST_GET_STATIONS: {
-			/* get stations */
-			assert (req->responseData != NULL);
-
-			json_object *stations = json_object_object_get (result,
-					"stations"), *mix = NULL;
-
-			for (size_t i=0; i < json_object_array_length (stations); i++) {
-				PianoStation_t *tmpStation;
-				json_object *s = json_object_array_get_idx (stations, i);
-
-				if ((tmpStation = calloc (1, sizeof (*tmpStation))) == NULL) {
-					return PIANO_RET_OUT_OF_MEMORY;
-				}
-
-				PianoJsonParseStation (s, tmpStation);
-
-				if (tmpStation->isQuickMix) {
-					/* fix flags on other stations later */
-					mix = json_object_object_get (s, "quickMixStationIds");
-				}
-
-				/* start new linked list or append */
-				if (ph->stations == NULL) {
-					ph->stations = tmpStation;
-				} else {
-					PianoStation_t *curStation = ph->stations;
-					while (curStation->next != NULL) {
-						curStation = curStation->next;
-					}
-					curStation->next = tmpStation;
-				}
-			}
-
-			/* fix quickmix flags */
-			if (mix != NULL) {
-				PianoStation_t *curStation = ph->stations;
-				while (curStation != NULL) {
-					for (size_t i = 0; i < json_object_array_length (mix); i++) {
-						json_object *id = json_object_array_get_idx (mix, i);
-						if (strcmp (json_object_get_string (id),
-								curStation->id) == 0) {
-							curStation->useQuickMix = true;
-						}
-					}
-					curStation = curStation->next;
-				}
-			}
-			break;
-		}
-
-		case PIANO_REQUEST_GET_PLAYLIST: {
-			/* get playlist, usually four songs */
-			PianoRequestDataGetPlaylist_t *reqData = req->data;
-			PianoSong_t *playlist = NULL;
-
-			assert (req->responseData != NULL);
-			assert (reqData != NULL);
-
-			json_object *items = json_object_object_get (result, "items");
-			assert (items != NULL);
-
-			for (size_t i=0; i < json_object_array_length (items); i++) {
-				json_object *s = json_object_array_get_idx (items, i);
-				PianoSong_t *song;
-
-				if ((song = calloc (1, sizeof (*song))) == NULL) {
-					return PIANO_RET_OUT_OF_MEMORY;
-				}
-
-				if (json_object_object_get (s, "artistName") == NULL) {
-					free (song);
-					continue;
-				}
-				song->audioUrl = strdup (json_object_get_string (json_object_object_get (json_object_object_get (json_object_object_get (s, "audioUrlMap"), "highQuality"), "audioUrl")));
-				song->artist = PianoJsonStrdup (s, "artistName");
-				song->album = PianoJsonStrdup (s, "albumName");
-				song->title = PianoJsonStrdup (s, "songName");
-				song->trackToken = PianoJsonStrdup (s, "trackToken");
-				song->stationId = PianoJsonStrdup (s, "stationId");
-				song->fileGain = json_object_get_double (
-						json_object_object_get (s, "trackGain"));
-				song->audioFormat = PIANO_AF_AACPLUS;
-				switch (json_object_get_int (json_object_object_get (s,
-						"songRating"))) {
-					case 1:
-						song->rating = PIANO_RATE_LOVE;
-						break;
-				}
-
-				/* begin linked list or append */
-				if (playlist == NULL) {
-					playlist = song;
-				} else {
-					PianoSong_t *curSong = playlist;
-					while (curSong->next != NULL) {
-						curSong = curSong->next;
-					}
-					curSong->next = song;
-				}
-			}
-
-			reqData->retPlaylist = playlist;
-			break;
-		}
-
-		case PIANO_REQUEST_RATE_SONG: {
-			/* love/ban song */
-			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_RENAME_STATION: {
-			/* rename station and update PianoStation_t structure */
-			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_MOVE_SONG: {
-			/* move song to different station */
-			PianoRequestDataMoveSong_t *reqData = req->data;
-
-			assert (req->responseData != NULL);
-			assert (reqData != NULL);
-			assert (reqData->step < 2);
-
-			if (reqData->step == 0) {
-				ret = PIANO_RET_CONTINUE_REQUEST;
-				++reqData->step;
-			}
-			break;
-		}
-
-		case PIANO_REQUEST_DELETE_STATION: {
-			/* delete station from server and station list */
-			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;
-			PianoSearchResult_t *searchResult;
-
-			assert (req->responseData != NULL);
-			assert (reqData != NULL);
-
-			searchResult = &reqData->searchResult;
-			memset (searchResult, 0, sizeof (*searchResult));
-
-			/* get artists */
-			json_object *artists = json_object_object_get (result, "artists");
-			if (artists != NULL) {
-				for (size_t i=0; i < json_object_array_length (artists); i++) {
-					json_object *a = json_object_array_get_idx (artists, i);
-					PianoArtist_t *artist;
-
-					if ((artist = calloc (1, sizeof (*artist))) == NULL) {
-						return PIANO_RET_OUT_OF_MEMORY;
-					}
-
-					artist->name = PianoJsonStrdup (a, "artistName");
-					artist->musicId = PianoJsonStrdup (a, "musicToken");
-
-					/* add result to linked list */
-					if (searchResult->artists == NULL) {
-						searchResult->artists = artist;
-					} else {
-						PianoArtist_t *curArtist = searchResult->artists;
-						while (curArtist->next != NULL) {
-							curArtist = curArtist->next;
-						}
-						curArtist->next = artist;
-					}
-				}
-			}
-
-			/* get songs */
-			json_object *songs = json_object_object_get (result, "songs");
-			if (songs != NULL) {
-				for (size_t i=0; i < json_object_array_length (songs); i++) {
-					json_object *s = json_object_array_get_idx (songs, i);
-					PianoSong_t *song;
-
-					if ((song = calloc (1, sizeof (*song))) == NULL) {
-						return PIANO_RET_OUT_OF_MEMORY;
-					}
-
-					song->title = PianoJsonStrdup (s, "songName");
-					song->artist = PianoJsonStrdup (s, "artistName");
-					song->musicId = PianoJsonStrdup (s, "musicToken");
-
-					/* add result to linked list */
-					if (searchResult->songs == NULL) {
-						searchResult->songs = song;
-					} else {
-						PianoSong_t *curSong = searchResult->songs;
-						while (curSong->next != NULL) {
-							curSong = curSong->next;
-						}
-						curSong->next = song;
-					}
-				}
-			}
-			break;
-		}
-
-		case PIANO_REQUEST_CREATE_STATION: {
-			/* create station, insert new station into station list on success */
-			PianoStation_t *tmpStation;
-
-			if ((tmpStation = calloc (1, sizeof (*tmpStation))) == NULL) {
-				return PIANO_RET_OUT_OF_MEMORY;
-			}
-
-			PianoJsonParseStation (result, tmpStation);
-
-			/* start new linked list or append */
-			if (ph->stations == NULL) {
-				ph->stations = tmpStation;
-			} else {
-				PianoStation_t *curStation = ph->stations;
-				while (curStation->next != NULL) {
-					curStation = curStation->next;
-				}
-				curStation->next = tmpStation;
-			}
-			break;
-		}
-
-		case PIANO_REQUEST_ADD_SEED:
-		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:
-		case PIANO_REQUEST_DELETE_SEED:
-			/* response unused */
-			break;
-
-		case PIANO_REQUEST_GET_GENRE_STATIONS: {
-			/* get genre stations */
-			json_object *categories = json_object_object_get (result, "categories");
-			if (categories != NULL) {
-				for (size_t i = 0; i < json_object_array_length (categories); i++) {
-					json_object *c = json_object_array_get_idx (categories, i);
-					PianoGenreCategory_t *tmpGenreCategory;
-
-					if ((tmpGenreCategory = calloc (1,
-							sizeof (*tmpGenreCategory))) == NULL) {
-						return PIANO_RET_OUT_OF_MEMORY;
-					}
-
-					tmpGenreCategory->name = PianoJsonStrdup (c,
-							"categoryName");
-
-					/* get genre subnodes */
-					json_object *stations = json_object_object_get (c,
-							"stations");
-					if (stations != NULL) {
-						for (size_t k = 0;
-								k < json_object_array_length (stations); k++) {
-							json_object *s =
-									json_object_array_get_idx (stations, k);
-							PianoGenre_t *tmpGenre;
-
-							if ((tmpGenre = calloc (1,
-									sizeof (*tmpGenre))) == NULL) {
-								return PIANO_RET_OUT_OF_MEMORY;
-							}
-
-							/* get genre attributes */
-							tmpGenre->name = PianoJsonStrdup (s,
-									"stationName");
-							tmpGenre->musicId = PianoJsonStrdup (s,
-									"stationToken");
-
-							/* append station */
-							if (tmpGenreCategory->genres == NULL) {
-								tmpGenreCategory->genres = tmpGenre;
-							} else {
-								PianoGenre_t *curGenre =
-										tmpGenreCategory->genres;
-								while (curGenre->next != NULL) {
-									curGenre = curGenre->next;
-								}
-								curGenre->next = tmpGenre;
-							}
-						}
-					}
-					/* append category */
-					if (ph->genreStations == NULL) {
-						ph->genreStations = tmpGenreCategory;
-					} else {
-						PianoGenreCategory_t *curCat = ph->genreStations;
-						while (curCat->next != NULL) {
-							curCat = curCat->next;
-						}
-						curCat->next = tmpGenreCategory;
-					}
-				}
-			}
-			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);
-
-			station->isCreator = 1;
-			break;
-		}
-
-		case PIANO_REQUEST_EXPLAIN: {
-			/* explain why song was selected */
-			PianoRequestDataExplain_t *reqData = req->data;
-			const size_t strSize = 1024;
-			size_t pos = 0;
-
-			assert (reqData != NULL);
-
-			json_object *explanations = json_object_object_get (result,
-					"explanations");
-			if (explanations != NULL) {
-				reqData->retExplain = malloc (strSize *
-						sizeof (*reqData->retExplain));
-				strncpy (reqData->retExplain, "We're playing this track "
-						"because it features ", strSize);
-				pos = strlen (reqData->retExplain);
-				for (size_t i=0; i < json_object_array_length (explanations); i++) {
-					json_object *e = json_object_array_get_idx (explanations,
-							i);
-					const char *s = json_object_get_string (
-							json_object_object_get (e, "focusTraitName"));
-
-					strncpy (&reqData->retExplain[pos], s, strSize-pos-1);
-					pos += strlen (s);
-					if (i < json_object_array_length (explanations)-2) {
-						strncpy (&reqData->retExplain[pos], ", ", strSize-pos-1);
-						pos += 2;
-					} else if (i == json_object_array_length (explanations)-2) {
-						strncpy (&reqData->retExplain[pos], " and ", strSize-pos-1);
-						pos += 5;
-					} else {
-						strncpy (&reqData->retExplain[pos], ".", strSize-pos-1);
-						pos += 1;
-					}
-				}
-			}
-			break;
-		}
-
-		case PIANO_REQUEST_GET_SEED_SUGGESTIONS: {
-#if 0
-			/* find similar artists */
-			PianoRequestDataGetSeedSuggestions_t *reqData = req->data;
-
-			assert (req->responseData != NULL);
-			assert (reqData != NULL);
-
-			ret = PianoXmlParseSeedSuggestions (req->responseData,
-					&reqData->searchResult);
-#endif
-			break;
-		}
-
-		case PIANO_REQUEST_GET_STATION_INFO: {
-			/* get station information (seeds and feedback) */
-			PianoRequestDataGetStationInfo_t *reqData = req->data;
-			PianoStationInfo_t *info;
-
-			assert (reqData != NULL);
-
-			info = &reqData->info;
-			assert (info != NULL);
-
-			/* parse music seeds */
-			json_object *music = json_object_object_get (result, "music");
-			if (music != NULL) {
-				/* songs */
-				json_object *songs = json_object_object_get (music, "songs");
-				if (songs != NULL) {
-					for (size_t i = 0; i < json_object_array_length (songs); i++) {
-						json_object *s = json_object_array_get_idx (songs, i);
-						PianoSong_t *seedSong;
-
-						seedSong = calloc (1, sizeof (*seedSong));
-						if (seedSong == NULL) {
-							return PIANO_RET_OUT_OF_MEMORY;
-						}
-
-						seedSong->title = PianoJsonStrdup (s, "songName");
-						seedSong->artist = PianoJsonStrdup (s, "artistName");
-						seedSong->seedId = PianoJsonStrdup (s, "seedId");
-
-						if (info->songSeeds == NULL) {
-							info->songSeeds = seedSong;
-						} else {
-							PianoSong_t *curSong = info->songSeeds;
-							while (curSong->next != NULL) {
-								curSong = curSong->next;
-							}
-							curSong->next = seedSong;
-						}
-					}
-				}
-
-				/* artists */
-				json_object *artists = json_object_object_get (music,
-						"artists");
-				if (artists != NULL) {
-					for (size_t i = 0; i < json_object_array_length (artists); i++) {
-						json_object *a = json_object_array_get_idx (artists, i);
-						PianoArtist_t *seedArtist;
-
-						seedArtist = calloc (1, sizeof (*seedArtist));
-						if (seedArtist == NULL) {
-							return PIANO_RET_OUT_OF_MEMORY;
-						}
-
-						seedArtist->name = PianoJsonStrdup (a, "artistName");
-						seedArtist->seedId = PianoJsonStrdup (a, "seedId");
-
-						if (info->artistSeeds == NULL) {
-							info->artistSeeds = seedArtist;
-						} else {
-							PianoArtist_t *curArtist = info->artistSeeds;
-							while (curArtist->next != NULL) {
-								curArtist = curArtist->next;
-							}
-							curArtist->next = seedArtist;
-						}
-					}
-				}
-			}
-
-			/* parse feedback */
-			json_object *feedback = json_object_object_get (result,
-					"feedback");
-			if (feedback != NULL) {
-				json_object_object_foreach (feedback, key, val) {
-					for (size_t i = 0; i < json_object_array_length (val); i++) {
-						json_object *s = json_object_array_get_idx (val, i);
-						PianoSong_t *feedbackSong;
-
-						feedbackSong = calloc (1, sizeof (*feedbackSong));
-						if (feedbackSong == NULL) {
-							return PIANO_RET_OUT_OF_MEMORY;
-						}
-
-						feedbackSong->title = PianoJsonStrdup (s, "songName");
-						feedbackSong->artist = PianoJsonStrdup (s,
-								"artistName");
-						feedbackSong->feedbackId = PianoJsonStrdup (s,
-								"feedbackId");
-						feedbackSong->rating = json_object_get_boolean (
-								json_object_object_get (s, "isPositive")) ?
-								PIANO_RATE_LOVE : PIANO_RATE_BAN;
-
-
-						if (info->feedback == NULL) {
-							info->feedback = feedbackSong;
-						} else {
-							PianoSong_t *curSong = info->feedback;
-							while (curSong->next != NULL) {
-								curSong = curSong->next;
-							}
-							curSong->next = feedbackSong;
-						}
-					}
-				}
-			}
-			break;
-		}
-	}
-
-	json_object_put (j);
-
-	return ret;
-}
 
 /*	get station from list by id
  *	@param search here