502 lines
11 KiB
C
502 lines
11 KiB
C
/* the Music Player Daemon (MPD)
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* Copyright (C) 2007 by Warren Dukes (warren.dukes@gmail.com)
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* This project's homepage is: http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "storedPlaylist.h"
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#include "log.h"
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#include "path.h"
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#include "utils.h"
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#include "playlist.h"
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#include "ack.h"
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#include "command.h"
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#include "ls.h"
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#include "directory.h"
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#include <string.h>
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#include <errno.h>
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static char *utf8pathToFsPathInStoredPlaylist(const char *utf8path, int fd)
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{
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char *file;
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char *rfile;
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char *actualFile;
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if (strstr(utf8path, "/")) {
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commandError(fd, ACK_ERROR_ARG, "playlist name \"%s\" is "
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"invalid: playlist names may not contain slashes",
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utf8path);
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return NULL;
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}
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file = utf8ToFsCharset((char *)utf8path);
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rfile = xmalloc(strlen(file) + strlen(".") +
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strlen(PLAYLIST_FILE_SUFFIX) + 1);
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strcpy(rfile, file);
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strcat(rfile, ".");
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strcat(rfile, PLAYLIST_FILE_SUFFIX);
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actualFile = rpp2app(rfile);
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free(rfile);
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return actualFile;
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}
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static unsigned int lengthOfStoredPlaylist(StoredPlaylist *sp)
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{
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return sp->list->numberOfNodes;
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}
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static ListNode *nodeOfStoredPlaylist(StoredPlaylist *sp, int index)
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{
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int forward;
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ListNode *node;
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int i;
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if (index >= lengthOfStoredPlaylist(sp) || index < 0)
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return NULL;
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if (index > lengthOfStoredPlaylist(sp)/2) {
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forward = 0;
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node = sp->list->lastNode;
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i = lengthOfStoredPlaylist(sp) - 1;
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} else {
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forward = 1;
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node = sp->list->firstNode;
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i = 0;
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}
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while (node != NULL) {
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if (i == index)
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return node;
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if (forward) {
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i++;
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node = node->nextNode;
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} else {
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i--;
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node = node->prevNode;
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}
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}
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return NULL;
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}
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static void appendSongToStoredPlaylist(StoredPlaylist *sp, Song *song)
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{
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insertInListWithoutKey(sp->list, xstrdup(getSongUrl(song)));
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}
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StoredPlaylist *newStoredPlaylist(const char *utf8name, int fd, int ignoreExisting)
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{
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struct stat buf;
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char *filename = NULL;
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StoredPlaylist *sp = calloc(1, sizeof(*sp));
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if (!sp)
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return NULL;
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if (utf8name) {
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filename = utf8pathToFsPathInStoredPlaylist(utf8name, fd);
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if (filename && stat(filename, &buf) == 0 &&
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ignoreExisting == 0) {
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commandError(fd, ACK_ERROR_EXIST,
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"a file or directory already exists with "
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"the name \"%s\"", utf8name);
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free(sp);
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return NULL;
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}
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}
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sp->list = makeList(DEFAULT_FREE_DATA_FUNC, 0);
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sp->fd = fd;
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if (filename)
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sp->fspath = xstrdup(filename);
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return sp;
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}
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StoredPlaylist *loadStoredPlaylist(const char *utf8path, int fd)
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{
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char *filename;
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StoredPlaylist *sp;
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FILE *file;
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char s[MAXPATHLEN + 1];
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int slength = 0;
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char *temp = utf8ToFsCharset((char *)utf8path);
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char *parent = parentPath(temp);
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int parentlen = strlen(parent);
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int tempInt;
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int commentCharFound = 0;
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Song *song;
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filename = utf8pathToFsPathInStoredPlaylist(utf8path, fd);
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if (!filename)
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return NULL;
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while (!(file = fopen(filename, "r")) && errno == EINTR);
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if (file == NULL) {
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commandError(fd, ACK_ERROR_NO_EXIST, "could not open file "
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"\"%s\": %s", filename, strerror(errno));
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return NULL;
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}
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sp = newStoredPlaylist(utf8path, fd, 1);
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if (!sp)
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goto out;
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while ((tempInt = fgetc(file)) != EOF) {
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s[slength] = tempInt;
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if (s[slength] == '\n' || s[slength] == '\0') {
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commentCharFound = 0;
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s[slength] = '\0';
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if (s[0] == PLAYLIST_COMMENT)
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commentCharFound = 1;
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if (strncmp(s, musicDir, strlen(musicDir)) == 0) {
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strcpy(s, &(s[strlen(musicDir)]));
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} else if (parentlen) {
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temp = xstrdup(s);
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memset(s, 0, MAXPATHLEN + 1);
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strcpy(s, parent);
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strncat(s, "/", MAXPATHLEN - parentlen);
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strncat(s, temp, MAXPATHLEN - parentlen - 1);
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if (strlen(s) >= MAXPATHLEN) {
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commandError(sp->fd,
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ACK_ERROR_PLAYLIST_LOAD,
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"\"%s\" is too long", temp);
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free(temp);
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freeStoredPlaylist(sp);
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sp = NULL;
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goto out;
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}
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free(temp);
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}
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slength = 0;
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temp = fsCharsetToUtf8(s);
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if (temp && !commentCharFound) {
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song = getSongFromDB(temp);
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if (song) {
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appendSongToStoredPlaylist(sp, song);
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continue;
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}
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if (!isValidRemoteUtf8Url(temp))
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continue;
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song = newSong(temp, SONG_TYPE_URL, NULL);
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if (song) {
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appendSongToStoredPlaylist(sp, song);
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freeJustSong(song);
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}
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}
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} else if (slength == MAXPATHLEN) {
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s[slength] = '\0';
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commandError(sp->fd, ACK_ERROR_PLAYLIST_LOAD,
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"line \"%s\" in playlist \"%s\" "
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"is too long", s, utf8path);
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freeStoredPlaylist(sp);
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sp = NULL;
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goto out;
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} else if (s[slength] != '\r') {
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slength++;
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}
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}
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out:
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while (fclose(file) && errno == EINTR);
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return sp;
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}
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void freeStoredPlaylist(StoredPlaylist *sp)
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{
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if (sp->list)
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freeList(sp->list);
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if (sp->fspath)
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free(sp->fspath);
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free(sp);
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}
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static int moveSongInStoredPlaylist(int fd, StoredPlaylist *sp, int src, int dest)
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{
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ListNode *srcNode, *destNode;
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if (src >= lengthOfStoredPlaylist(sp) || dest >= lengthOfStoredPlaylist(sp) || src < 0 || dest < 0 || src == dest) {
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commandError(fd, ACK_ERROR_ARG, "argument out of range");
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return -1;
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}
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srcNode = nodeOfStoredPlaylist(sp, src);
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if (!srcNode)
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return -1;
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destNode = nodeOfStoredPlaylist(sp, dest);
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/* remove src */
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if (srcNode->prevNode)
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srcNode->prevNode->nextNode = srcNode->nextNode;
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else
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sp->list->firstNode = srcNode->nextNode;
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if (srcNode->nextNode)
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srcNode->nextNode->prevNode = srcNode->prevNode;
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else
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sp->list->lastNode = srcNode->prevNode;
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/* this is all a bit complicated - but I tried to
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* maintain the same order stuff is moved as in the
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* real playlist */
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if (dest == 0) {
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sp->list->firstNode->prevNode = srcNode;
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srcNode->nextNode = sp->list->firstNode;
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srcNode->prevNode = NULL;
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sp->list->firstNode = srcNode;
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} else if ((dest + 1) == lengthOfStoredPlaylist(sp)) {
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sp->list->lastNode->nextNode = srcNode;
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srcNode->nextNode = NULL;
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srcNode->prevNode = sp->list->lastNode;
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sp->list->lastNode = srcNode;
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} else {
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if (destNode == NULL) {
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/* this shouldn't be happening. */
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return -1;
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}
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if (src > dest) {
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destNode->prevNode->nextNode = srcNode;
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srcNode->prevNode = destNode->prevNode;
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srcNode->nextNode = destNode;
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destNode->prevNode = srcNode;
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} else {
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destNode->nextNode->prevNode = srcNode;
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srcNode->prevNode = destNode;
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srcNode->nextNode = destNode->nextNode;
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destNode->nextNode = srcNode;
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}
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}
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return 0;
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}
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int moveSongInStoredPlaylistByPath(int fd, const char *utf8path, int src, int dest)
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{
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StoredPlaylist *sp = loadStoredPlaylist(utf8path, fd);
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if (!sp) {
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commandError(fd, ACK_ERROR_UNKNOWN, "could not open playlist");
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return -1;
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}
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if (moveSongInStoredPlaylist(fd, sp, src, dest) != 0) {
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freeStoredPlaylist(sp);
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return -1;
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}
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if (writeStoredPlaylist(sp) != 0) {
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commandError(fd, ACK_ERROR_UNKNOWN, "failed to save playlist");
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freeStoredPlaylist(sp);
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return -1;
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}
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freeStoredPlaylist(sp);
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return 0;
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}
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/* Not used currently
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static void removeAllFromStoredPlaylist(StoredPlaylist *sp)
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{
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freeList(sp->list);
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sp->list = makeList(DEFAULT_FREE_DATA_FUNC, 0);
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}
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*/
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int removeAllFromStoredPlaylistByPath(int fd, const char *utf8path)
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{
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char *filename;
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FILE *file;
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filename = utf8pathToFsPathInStoredPlaylist(utf8path, fd);
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if (!filename)
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return -1;
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while (!(file = fopen(filename, "w")) && errno == EINTR);
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if (file == NULL) {
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commandError(fd, ACK_ERROR_NO_EXIST, "could not open file "
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"\"%s\": %s", filename, strerror(errno));
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return -1;
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}
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while (fclose(file) != 0 && errno == EINTR);
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return 0;
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}
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static int removeOneSongFromStoredPlaylist(int fd, StoredPlaylist *sp, int pos)
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{
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ListNode *node = nodeOfStoredPlaylist(sp, pos);
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if (!node) {
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commandError(fd, ACK_ERROR_ARG,
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"could not find song at position");
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return -1;
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}
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deleteNodeFromList(sp->list, node);
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return 0;
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}
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int removeOneSongFromStoredPlaylistByPath(int fd, const char *utf8path, int pos)
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{
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StoredPlaylist *sp = loadStoredPlaylist(utf8path, fd);
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if (!sp) {
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commandError(fd, ACK_ERROR_UNKNOWN, "could not open playlist");
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return -1;
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}
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if (removeOneSongFromStoredPlaylist(fd, sp, pos) != 0) {
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freeStoredPlaylist(sp);
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return -1;
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}
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if (writeStoredPlaylist(sp) != 0) {
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commandError(fd, ACK_ERROR_UNKNOWN, "failed to save playlist");
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freeStoredPlaylist(sp);
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return -1;
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}
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freeStoredPlaylist(sp);
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return 0;
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}
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static int writeStoredPlaylistToPath(StoredPlaylist *sp, const char *fspath)
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{
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ListNode *node;
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FILE *file;
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char *s;
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if (fspath == NULL)
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return -1;
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while (!(file = fopen(fspath, "w")) && errno == EINTR);
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if (file == NULL) {
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commandError(sp->fd, ACK_ERROR_NO_EXIST, "could not open file "
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"\"%s\": %s", fspath, strerror(errno));
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return -1;
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}
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node = sp->list->firstNode;
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while (node != NULL) {
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s = (char *)node->data;
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if (isValidRemoteUtf8Url(s) || !playlist_saveAbsolutePaths)
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s = utf8ToFsCharset(s);
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else
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s = rmp2amp(utf8ToFsCharset(s));
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fprintf(file, "%s\n", s);
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node = node->nextNode;
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}
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while (fclose(file) != 0 && errno == EINTR);
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return 0;
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}
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int writeStoredPlaylist(StoredPlaylist *sp)
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{
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return writeStoredPlaylistToPath(sp, sp->fspath);
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}
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int appendSongToStoredPlaylistByPath(int fd, const char *utf8path, Song *song)
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{
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char *filename;
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FILE *file;
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char *s;
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filename = utf8pathToFsPathInStoredPlaylist(utf8path, fd);
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if (!filename)
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return -1;
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while (!(file = fopen(filename, "a")) && errno == EINTR);
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if (file == NULL) {
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commandError(fd, ACK_ERROR_NO_EXIST, "could not open file "
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"\"%s\": %s", filename, strerror(errno));
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return -1;
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}
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if (playlist_saveAbsolutePaths && song->type == SONG_TYPE_FILE)
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s = rmp2amp(utf8ToFsCharset(getSongUrl(song)));
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else
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s = utf8ToFsCharset(getSongUrl(song));
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fprintf(file, "%s\n", s);
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while (fclose(file) != 0 && errno == EINTR);
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return 0;
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}
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void appendPlaylistToStoredPlaylist(StoredPlaylist *sp, Playlist *playlist)
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{
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int i;
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for (i = 0; i < playlist->length; i++)
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appendSongToStoredPlaylist(sp, playlist->songs[i]);
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}
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int renameStoredPlaylist(int fd, const char *utf8from, const char *utf8to)
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{
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struct stat st;
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char *from;
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char *to;
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int ret = 0;
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from = xstrdup(utf8pathToFsPathInStoredPlaylist(utf8from, fd));
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if (!from)
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return -1;
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to = xstrdup(utf8pathToFsPathInStoredPlaylist(utf8to, fd));
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if (!to) {
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free(from);
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return -1;
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}
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if (stat(from, &st) != 0) {
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commandError(fd, ACK_ERROR_NO_EXIST,
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"no playlist named \"%s\"", utf8from);
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ret = -1;
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goto out;
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}
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if (stat(to, &st) == 0) {
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commandError(fd, ACK_ERROR_EXIST, "a file or directory "
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"already exists with the name \"%s\"", utf8to);
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ret = -1;
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goto out;
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}
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if (rename(from, to) < 0) {
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commandError(fd, ACK_ERROR_UNKNOWN,
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"could not rename playlist \"%s\" to \"%s\": %s",
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utf8from, utf8to, strerror(errno));
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ret = -1;
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goto out;
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}
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out:
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free(from);
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free(to);
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return ret;
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}
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