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/*
* Copyright (C) 2003-2014 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "FileCommands.hxx"
#include "CommandError.hxx"
#include "protocol/Ack.hxx"
#include "protocol/Result.hxx"
#include "client/Client.hxx"
#include "util/CharUtil.hxx"
#include "util/UriUtil.hxx"
#include "util/Error.hxx"
#include "tag/TagHandler.hxx"
#include "tag/ApeTag.hxx"
#include "tag/TagId3.hxx"
#include "TagStream.hxx"
#include "TagFile.hxx"
#include "storage/StorageInterface.hxx"
#include "fs/AllocatedPath.hxx"
#include "ls.hxx"
#include <assert.h>
gcc_pure
static bool
IsValidName(const char *p)
{
if (!IsAlphaASCII(*p))
return false;
while (*++p) {
const char ch = *p;
if (!IsAlphaASCII(ch) && ch != '_' && ch != '-')
return false;
}
return true;
}
gcc_pure
static bool
IsValidValue(const char *p)
{
while (*p) {
const char ch = *p++;
if ((unsigned char)ch < 0x20)
return false;
}
return true;
}
static void
print_pair(const char *key, const char *value, void *ctx)
{
Client &client = *(Client *)ctx;
if (IsValidName(key) && IsValidValue(value))
client_printf(client, "%s: %s\n", key, value);
}
static constexpr tag_handler print_comment_handler = {
nullptr,
nullptr,
print_pair,
};
static CommandResult
read_stream_comments(Client &client, const char *uri)
{
if (!uri_supported_scheme(uri)) {
command_error(client, ACK_ERROR_NO_EXIST,
"unsupported URI scheme");
return CommandResult::ERROR;
}
if (!tag_stream_scan(uri, print_comment_handler, &client)) {
command_error(client, ACK_ERROR_NO_EXIST,
"Failed to load file");
return CommandResult::ERROR;
}
return CommandResult::OK;
}
static CommandResult
read_file_comments(Client &client, const Path path_fs)
{
if (!tag_file_scan(path_fs, print_comment_handler, &client)) {
command_error(client, ACK_ERROR_NO_EXIST,
"Failed to load file");
return CommandResult::ERROR;
}
tag_ape_scan2(path_fs, &print_comment_handler, &client);
tag_id3_scan(path_fs, &print_comment_handler, &client);
return CommandResult::OK;
}
CommandResult
handle_read_comments(Client &client, gcc_unused int argc, char *argv[])
{
assert(argc == 2);
const char *const uri = argv[1];
if (memcmp(uri, "file:///", 8) == 0) {
/* read comments from arbitrary local file */
const char *path_utf8 = uri + 7;
AllocatedPath path_fs = AllocatedPath::FromUTF8(path_utf8);
if (path_fs.IsNull()) {
command_error(client, ACK_ERROR_NO_EXIST,
"unsupported file name");
return CommandResult::ERROR;
}
Error error;
if (!client.AllowFile(path_fs, error))
return print_error(client, error);
return read_file_comments(client, path_fs);
} else if (uri_has_scheme(uri)) {
return read_stream_comments(client, uri);
} else if (!PathTraitsUTF8::IsAbsolute(uri)) {
#ifdef ENABLE_DATABASE
const Storage *storage = client.GetStorage();
if (storage == nullptr) {
#endif
command_error(client, ACK_ERROR_NO_EXIST,
"No database");
return CommandResult::ERROR;
#ifdef ENABLE_DATABASE
}
{
AllocatedPath path_fs = storage->MapFS(uri);
if (!path_fs.IsNull())
return read_file_comments(client, path_fs);
}
{
const std::string uri2 = storage->MapUTF8(uri);
if (uri_has_scheme(uri2.c_str()))
return read_stream_comments(client,
uri2.c_str());
}
command_error(client, ACK_ERROR_NO_EXIST, "No such file");
return CommandResult::ERROR;
#endif
} else {
command_error(client, ACK_ERROR_NO_EXIST, "No such file");
return CommandResult::ERROR;
}
}
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