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vlc/modules/media_library/sql_update.c

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/*****************************************************************************
* sql_update.c: SQL-based media library: all database update functions
*****************************************************************************
* Copyright (C) 2008-2010 the VideoLAN team and AUTHORS
* $Id$
*
* Authors: Antoine Lejeune <phytos@videolan.org>
* Jean-Philippe André <jpeg@videolan.org>
* Rémi Duraffort <ivoire@videolan.org>
* Adrien Maglo <magsoft@videolan.org>
* Srikanth Raju <srikiraju at gmail dot com>
*
* 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 "sql_media_library.h"
/**
* @brief Generic update in Media Library database
*
* @param p_ml the media library object
* @param selected_type the type of the element we're selecting
* @param where the list of ids or uri to change
* @param changes list of changes to make in the entries
* @return VLC_SUCCESS or VLC_EGENERIC
* @note This function is transactional
*/
int Update( media_library_t *p_ml, ml_select_e selected_type,
const char* psz_lvalue, ml_ftree_t *where, vlc_array_t *changes )
{
int i_ret = VLC_EGENERIC;
char *psz_query = NULL;
char *psz_id_query = NULL;
char **pp_results = NULL;
int i_rows = 0, i_cols = 0;
i_ret = BuildUpdate( p_ml, &psz_query, &psz_id_query,
psz_lvalue, selected_type, where, changes );
if( i_ret != VLC_SUCCESS )
{
msg_Err(p_ml,"Failed to generate update query" );
return i_ret;
}
i_ret = VLC_EGENERIC;
Begin( p_ml );
if( QuerySimple( p_ml, "%s", psz_query ) != VLC_SUCCESS )
{
msg_Err( p_ml, "Couldn't run the generated update query successfully" );
goto quitdelete;
}
/* Get the updated IDs to send events! */
if( Query( p_ml, &pp_results, &i_rows, &i_cols, psz_id_query )
!= VLC_SUCCESS )
goto quitdelete;
i_ret = VLC_SUCCESS;
quitdelete:
if( i_ret != VLC_SUCCESS )
Rollback( p_ml );
else
{
Commit( p_ml );
if( i_rows > 0 )
{
for( int i = 0; i < i_rows; i++ )
{
var_SetInteger( p_ml, "media-meta-change",
atoi( pp_results[i*i_cols] ) );
}
}
}
FreeSQLResult( p_ml, pp_results );
free( psz_id_query );
free( psz_query );
return i_ret;
}
#define SET_STR( a ) \
if( !psz_set[i_type] ) \
{ \
psz_set[i_type] = sql_Printf( p_ml->p_sys->p_sql, a, find->value.str ); \
if( !psz_set[i_type] ) \
goto quit_buildupdate; \
} \
break;
#define SET_INT( a ) \
if( !psz_set[i_type] ) \
{ \
psz_set[i_type] = sql_Printf( p_ml->p_sys->p_sql, a, find->value.i ); \
if( !psz_set[i_type] ) \
goto quit_buildupdate; \
} \
break;
/* TODO: Build smarter updates by using IN () */
static int BuildWhere( media_library_t* p_ml, char **ppsz_where, ml_ftree_t *tree )
{
assert( ppsz_where );
char* psz_left = NULL;
char* psz_right = NULL;
int i_ret = VLC_SUCCESS;
switch( tree->op )
{
case ML_OP_AND:
case ML_OP_OR:
i_ret = BuildWhere( p_ml, &psz_left, tree->left );
if( i_ret != VLC_SUCCESS )
goto quit_buildwhere;
i_ret = BuildWhere( p_ml, &psz_right, tree->right );
if( i_ret != VLC_SUCCESS )
goto quit_buildwhere;
if( psz_left == NULL || psz_right == NULL )
{
msg_Err( p_ml, "Couldn't build AND/OR for Update statement" );
i_ret = VLC_EGENERIC;
goto quit_buildwhere;
}
if( asprintf( ppsz_where, "( %s %s %s )", psz_left,
( tree->op == ML_OP_AND ? "AND" : "OR" ), psz_right ) == -1 )
{
i_ret = VLC_ENOMEM;
goto quit_buildwhere;
}
break;
case ML_OP_NOT:
i_ret = BuildWhere( p_ml, &psz_left, tree->left );
if( i_ret != VLC_SUCCESS )
goto quit_buildwhere;
if( psz_left == NULL )
{
msg_Err( p_ml, "Couldn't build NOT for Update statement" );
i_ret = VLC_EGENERIC;
goto quit_buildwhere;
}
if( asprintf( ppsz_where, "( NOT %s )", psz_left ) == -1 )
{
i_ret = VLC_ENOMEM;
goto quit_buildwhere;
}
break;
case ML_OP_SPECIAL:
msg_Err( p_ml, "Couldn't build special for Update statement" );
break;
case ML_OP_NONE:
switch( tree->criteria )
{
case ML_ID:
assert( tree->comp == ML_COMP_EQUAL );
*ppsz_where = sql_Printf( p_ml->p_sys->p_sql, "media.id = %d",
tree->value.i );
if( *ppsz_where == NULL )
goto quit_buildwhere;
break;
case ML_URI:
assert( tree->comp == ML_COMP_EQUAL );
*ppsz_where = sql_Printf( p_ml->p_sys->p_sql, "media.uri = %q",
tree->value.str );
if( *ppsz_where == NULL )
goto quit_buildwhere;
break;
default:
msg_Err( p_ml, "Trying to update with unsupported condition" );
break;
}
}
quit_buildwhere:
return i_ret;
}
/**
* @brief Generic UPDATE query builder
*
* @param p_ml This media_library_t object
* @param ppsz_query *ppsz_query will contain query for update
* @param ppsz_id_query will contain query to get the ids of updated files
* @param selected_type the type of the element we're selecting
* @param where parse tree of where condition
* @param changes list of changes to make in the entries
* @return VLC_SUCCESS or VLC_EGENERIC
*/
int BuildUpdate( media_library_t *p_ml,
char **ppsz_query, char **ppsz_id_query,
const char *psz_lvalue,
ml_select_e selected_type,
ml_ftree_t *where, vlc_array_t *changes )
{
assert( ppsz_query );
assert( ppsz_id_query );
*ppsz_query = NULL;
int i_type;
int i_index;
int i_ret = VLC_ENOMEM;
char *psz_table = NULL;
/* TODO: Hack? */
char *psz_set[ ML_DIRECTORY + 1 ] = { NULL };
char *psz_fullset = NULL;
char *psz_extra = NULL; /*<< For an update to extra table */
char *psz_where = NULL;
char *psz_tmp = NULL;
int *pi_padd_ids = NULL;
int i_people_add = 0;
int i_album_id = 0;
char *psz_album = NULL;
char *psz_cover = NULL;
if( !where )
{
msg_Warn( p_ml, "You're trying to update no rows."
"Trying to guess update based on uri" );
}
/* Create the id/uri lists for WHERE part of the query */
i_ret = BuildWhere( p_ml, &psz_where, where );
if( i_ret != VLC_SUCCESS )
goto quit_buildupdate;
i_ret = VLC_ENOMEM;
/** Firstly, choose the right table */
switch( selected_type )
{
case ML_ALBUM:
psz_table = strdup( "album" );
break;
case ML_PEOPLE:
psz_table = strdup( "people" );
break;
case ML_MEDIA:
psz_table = strdup( "media" );
break;
default:
msg_Err( p_ml, "Not a valid element to Update!" );
i_ret = VLC_EGENERIC;
goto quit_buildupdate;
break;
}
if( !psz_table )
return VLC_ENOMEM;
/** Secondly, build the SET part of the query */
for( i_index = 0; i_index < vlc_array_count( changes ); i_index++ )
{
ml_element_t *find = ( ml_element_t * )
vlc_array_item_at_index( changes, i_index );
i_type = find->criteria;
switch( i_type )
{
case ML_ALBUM:
if( selected_type == ML_ALBUM )
{
if( !psz_set[i_type] )
{
psz_set[i_type] = sql_Printf( p_ml->p_sys->p_sql,
"title = %Q",
find->value.str );
if( !psz_set[i_type] )
{
msg_Err( p_ml, "Couldn't create string at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
}
}
else if( selected_type == ML_MEDIA )
{
if( !psz_album )
psz_album = find->value.str;
}
else
assert( 0 );
break;
case ML_ALBUM_ID:
assert( selected_type != ML_ALBUM );
if( selected_type == ML_MEDIA )
{
if( i_album_id <= 0 )
{
i_album_id = find->value.i;
if( !psz_set[i_type] )
{
psz_set[i_type] = sql_Printf( p_ml->p_sys->p_sql,
"album_id = '%d'",
find->value.i );
if( !psz_set[i_type] )
{
msg_Err( p_ml, "Couldn't create string at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
}
}
}
break;
case ML_PEOPLE:
if( selected_type == ML_MEDIA )
{
pi_padd_ids = (int*) realloc( pi_padd_ids , ( ++i_people_add * sizeof(int) ) );
pi_padd_ids[ i_people_add - 1 ] = ml_GetInt( p_ml, ML_PEOPLE_ID,
find->lvalue.str, ML_PEOPLE, find->lvalue.str,
find->value.str );
if( pi_padd_ids[ i_people_add - 1 ] <= 0 )
{
AddPeople( p_ml, find->value.str, find->lvalue.str );
pi_padd_ids[ i_people_add - 1 ] = ml_GetInt( p_ml, ML_PEOPLE_ID,
find->lvalue.str, ML_PEOPLE, find->lvalue.str,
find->value.str );
}
}
else if( strcmp( psz_lvalue, find->lvalue.str ) )
{
msg_Err( p_ml, "Trying to update a different person type" );
return VLC_EGENERIC;
}
else
{
if( !psz_set[i_type] ) psz_set[i_type] =
sql_Printf( p_ml->p_sys->p_sql, "name = %Q", find->value.str );
}
break;
case ML_PEOPLE_ID:
/* TODO: Implement smarter updates for this case? */
assert( selected_type == ML_MEDIA );
if( selected_type == ML_MEDIA )
{
bool b_update = true;
for( int i = 0; i < i_people_add; i++ )
{
if( pi_padd_ids[ i ] == find->value.i )
{
b_update = false;
break;
}
}
if( b_update )
{
pi_padd_ids = (int *)realloc( pi_padd_ids, ( ++i_people_add * sizeof(int) ) );
pi_padd_ids[ i_people_add - 1 ] = find->value.i;
}
}
break;
case ML_PEOPLE_ROLE:
msg_Dbg( p_ml, "Can't update role" );
break;
case ML_COMMENT:
assert( selected_type == ML_MEDIA );
SET_STR( "comment = %Q" );
case ML_COVER:
assert( selected_type == ML_ALBUM || selected_type == ML_MEDIA );
psz_cover = find->value.str;
SET_STR( "cover = %Q" );
case ML_DISC_NUMBER:
assert( selected_type == ML_MEDIA );
SET_INT( "disc = '%d'" );
case ML_DURATION:
assert( selected_type == ML_MEDIA );
SET_INT( "duration = '%d'" );
case ML_EXTRA:
assert( selected_type == ML_MEDIA );
SET_STR( "extra = %Q" );
case ML_FIRST_PLAYED:
assert( selected_type == ML_MEDIA );
SET_INT( "first_played =='%d'" );
case ML_GENRE:
assert( selected_type == ML_MEDIA );
SET_STR( "genre = %Q" );
/* ID cannot be updated */
/* Import time can't be updated */
case ML_LAST_PLAYED:
assert( selected_type == ML_MEDIA );
SET_INT( "last_played = '%d'" );
case ML_ORIGINAL_TITLE:
assert( selected_type == ML_MEDIA );
SET_STR( "original_title = %Q" );
case ML_PLAYED_COUNT:
assert( selected_type == ML_MEDIA );
SET_INT( "played_count = '%d'" );
case ML_PREVIEW:
assert( selected_type == ML_MEDIA );
SET_STR( "preview = %Q" );
case ML_SKIPPED_COUNT:
assert( selected_type == ML_MEDIA );
SET_INT( "skipped_count = '%d'" );
case ML_SCORE:
assert( selected_type == ML_MEDIA );
SET_INT( "score = '%d'" );
case ML_TITLE:
assert( selected_type == ML_MEDIA );
SET_STR( "title = %Q" );
case ML_TRACK_NUMBER:
assert( selected_type == ML_MEDIA );
SET_INT( "track = '%d'" );
case ML_TYPE:
assert( selected_type == ML_MEDIA );
if( !psz_set[i_type] ) psz_set[i_type] =
sql_Printf( p_ml->p_sys->p_sql, "type = '%d'", find->value.i );
break;
case ML_URI:
assert( selected_type == ML_MEDIA );
if( !psz_set[i_type] )
{
psz_set[i_type] = sql_Printf( p_ml->p_sys->p_sql,
"uri = %Q",
find->value.str );
}
break;
case ML_VOTE:
assert( selected_type == ML_MEDIA );
SET_INT( "vote = '%d'" );
case ML_YEAR:
assert( selected_type == ML_MEDIA );
SET_INT( "year = '%d'" );
case ML_END:
goto exitfor;
default:
msg_Warn( p_ml, "Invalid type for update : %d", i_type );
}
}
exitfor:
/* TODO: Album artist. Verify albumart */
if( i_album_id <= 0 || ( psz_album && *psz_album ) )
{
i_album_id = ml_GetAlbumId( p_ml, psz_album );
if( i_album_id < 0 ) //0 is Unknown
{
i_ret = AddAlbum( p_ml, psz_album, psz_cover, 0 );
if( i_ret != VLC_SUCCESS )
{
msg_Err( p_ml, "Couldn't AddAlbum at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
i_album_id = ml_GetAlbumId( p_ml, psz_album );
if( i_album_id < 0 )
goto quit_buildupdate;
}
psz_set[ML_ALBUM_ID] = sql_Printf( p_ml->p_sys->p_sql,
"album_id = '%d'", i_album_id );
if( !psz_set[ML_ALBUM_ID] )
{
msg_Err( p_ml, "Couldn't create string at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
}
for( unsigned i = 0; i <= ML_DIRECTORY; i++ )
{
if( psz_set[i] )
{
if( i == ML_EXTRA || i == ML_LANGUAGE )
{
free( psz_tmp );
if( asprintf( &psz_tmp, "%s%s%s", psz_extra ? psz_extra : "",
psz_extra ? ", ": "", psz_set[i] ) == -1 )
{
msg_Err( p_ml, "Couldn't create string at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
free( psz_extra );
psz_extra = strdup( psz_tmp );
}
else
{
free( psz_tmp );
if( asprintf( &psz_tmp, "%s%s%s", psz_fullset ? psz_fullset : "",
psz_fullset ? ", ": "", psz_set[i] ) == -1 )
{
msg_Err( p_ml, "Couldn't create string at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
free( psz_fullset );
psz_fullset = strdup( psz_tmp );
}
}
}
i_ret = VLC_SUCCESS;
/** Now build the right WHERE condition */
assert( psz_where && *psz_where );
/** Finally build the full query */
/** Pass if we have some people to add - Indirect update */
if( !psz_fullset && i_people_add == 0 )
{
i_ret = VLC_EGENERIC;
msg_Err( p_ml, "Nothing found to create update at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
if( psz_fullset ){
if( asprintf( ppsz_query, "UPDATE %s SET %s WHERE %s", psz_table,
psz_fullset, psz_where ) == -1 )
{
msg_Err( p_ml, "Couldn't create string at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
}
if( selected_type == ML_MEDIA )
{
if( psz_extra )
{
if( asprintf( &psz_tmp, "%s; UPDATE extra SET %s WHERE %s",
*ppsz_query, psz_extra, psz_where ) == -1 )
{
msg_Err( p_ml, "Couldn't create string at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
free( *ppsz_query );
*ppsz_query = psz_tmp;
psz_tmp = NULL;
}
char* psz_idstring = NULL;
if( i_people_add > 0 )
{
for( int i = 0; i < i_people_add; i++ )
{
if( asprintf( &psz_tmp, "%s%s%d", psz_idstring == NULL? "" : psz_idstring,
psz_idstring == NULL ? "" : ",", pi_padd_ids[i] ) == -1 )
{
free( psz_tmp );
free( psz_idstring );
msg_Err( p_ml, "Couldn't create string at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
free( psz_idstring );
psz_idstring = psz_tmp;
psz_tmp = NULL;
}
/* Delete all connections with people whom we will update now! */
if( asprintf( &psz_tmp, "%s;DELETE FROM media_to_people WHERE EXISTS "
"(SELECT media.id, people.id FROM media JOIN media_to_people "
"AS temp ON media.id = temp.media_id "
"JOIN people ON temp.people_id = people.id "
"WHERE %s AND people.role IN "
"(SELECT people.role FROM people WHERE people.id IN (%s)) "
"AND people.id NOT IN (%s) "
"AND temp.media_id = media_to_people.media_id AND "
"temp.people_id = media_to_people.people_id )",
*ppsz_query == NULL ? "": *ppsz_query, psz_where,
psz_idstring, psz_idstring ) == -1 )
{
free( psz_idstring );
msg_Err( p_ml, "Couldn't create string at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
free( *ppsz_query );
*ppsz_query = psz_tmp;
psz_tmp = NULL;
free( psz_idstring );
}
for( int i = 0; i < i_people_add ; i++ )
{
if( pi_padd_ids[i] > 0 )
{
/* OR IGNORE will avoid errors from collisions from old media
* Perhaps this hack can be fixed...FIXME */
if( asprintf( &psz_tmp, "%s;INSERT OR IGNORE into media_to_people "
"(media_id,people_id) SELECT media.id, %d FROM media WHERE %s",
*ppsz_query == NULL ? "" : *ppsz_query, pi_padd_ids[i],
psz_where ) == -1 )
{
msg_Err( p_ml, "Couldn't create string at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
FREENULL( *ppsz_query );
*ppsz_query = psz_tmp;
psz_tmp = NULL;
}
}
}
if( asprintf( ppsz_id_query, "SELECT id AS %s_id FROM %s WHERE %s",
psz_table, psz_table, psz_where ) == -1 )
{
msg_Err( p_ml, "Couldn't create string at BuildUpdate():(%s, %d)",
__FILE__, __LINE__ );
goto quit_buildupdate;
}
#ifndef NDEBUG
msg_Dbg( p_ml, "updated media where %s", psz_where );
#endif
goto quit_buildupdate_success;
quit_buildupdate:
msg_Warn( p_ml, "BuildUpdate() could not generate update sql query" );
quit_buildupdate_success:
free( psz_tmp );
free( psz_table );
free( psz_fullset );
free( psz_extra );
free( pi_padd_ids );
for( int i = 0; i <= ML_DIRECTORY; i++ )
free( psz_set[ i ] );
return i_ret;
}
#undef SET_STR
#undef SET_INT
/**
* @brief Update a ml_media_t
*
* @param p_ml the media library object
* @param p_media media to synchronise in the database
* @return VLC_SUCCESS or VLC_EGENERIC
* @note: the media id may be 0, in this case, the update is based
* on the url (less powerful). This function is threadsafe
*
* This synchronises all non NULL and non zero fields of p_media
* Synchronization of album and people is TODO
*/
int UpdateMedia( media_library_t *p_ml, ml_media_t *p_media )
{
assert( p_media->i_id || ( p_media->psz_uri && *p_media->psz_uri ) );
vlc_array_t *changes = vlc_array_new();
ml_element_t *find = NULL;
int i_ret = VLC_EGENERIC;
ml_LockMedia( p_media );
#define APPEND_ICHANGES( cond, crit ) \
if( cond ) { \
find = ( ml_element_t* ) calloc( 1, sizeof( ml_element_t ) ); \
find->criteria = crit; \
find->value.i = cond; \
vlc_array_append( changes, find ); \
}
#define APPEND_SCHANGES( cond, crit ) \
if( cond ) { \
find = ( ml_element_t* ) calloc( 1, sizeof( ml_element_t ) ); \
find->criteria = crit; \
find->value.str = cond; \
vlc_array_append( changes, find ); \
}
APPEND_SCHANGES( p_media->psz_title, ML_TITLE );
APPEND_ICHANGES( p_media->i_type, ML_TYPE );
APPEND_ICHANGES( p_media->i_duration, ML_DURATION );
APPEND_SCHANGES( p_media->psz_preview, ML_PREVIEW );
APPEND_SCHANGES( p_media->psz_cover, ML_COVER );
APPEND_ICHANGES( p_media->i_disc_number, ML_DISC_NUMBER );
APPEND_ICHANGES( p_media->i_track_number, ML_TRACK_NUMBER );
APPEND_ICHANGES( p_media->i_year, ML_YEAR);
APPEND_SCHANGES( p_media->psz_genre, ML_GENRE );
APPEND_ICHANGES( p_media->i_album_id, ML_ALBUM_ID );
APPEND_SCHANGES( p_media->psz_album, ML_ALBUM );
APPEND_ICHANGES( p_media->i_skipped_count, ML_SKIPPED_COUNT );
APPEND_ICHANGES( p_media->i_last_skipped, ML_LAST_SKIPPED );
APPEND_ICHANGES( p_media->i_played_count, ML_PLAYED_COUNT );
APPEND_ICHANGES( p_media->i_last_played, ML_LAST_PLAYED );
APPEND_ICHANGES( p_media->i_first_played, ML_FIRST_PLAYED );
APPEND_ICHANGES( p_media->i_vote, ML_VOTE );
APPEND_ICHANGES( p_media->i_score, ML_SCORE );
APPEND_SCHANGES( p_media->psz_comment, ML_COMMENT );
APPEND_SCHANGES( p_media->psz_extra, ML_EXTRA );
APPEND_SCHANGES( p_media->psz_language, ML_LANGUAGE );
if( p_media->psz_uri && p_media->i_id )
{
find = ( ml_element_t* ) calloc( 1, sizeof( ml_element_t ) );
find->criteria = ML_URI;
find->value.str = p_media->psz_uri;
vlc_array_append( changes, find );
}
/*TODO: implement extended meta */
/* We're not taking import time! Good */
#undef APPEND_ICHANGES
#undef APPEND_SCHANGES
ml_person_t* person = p_media->p_people;
while( person )
{
if( person->i_id > 0 )
{
find = ( ml_element_t* ) calloc( 1, sizeof( ml_element_t ) );
find->criteria = ML_PEOPLE_ID;
find->lvalue.str = person->psz_role;
find->value.i = person->i_id;
vlc_array_append( changes, find );
}
else if( person->psz_name && *person->psz_name )
{
find = ( ml_element_t* ) calloc( 1, sizeof( ml_element_t ) );
find->criteria = ML_PEOPLE;
find->lvalue.str = person->psz_role;
find->value.str = person->psz_name;
vlc_array_append( changes, find );
}
person = person->p_next;
}
ml_ftree_t* p_where = NULL;
ml_ftree_t* p_where_elt = ( ml_ftree_t* ) calloc( 1, sizeof( ml_ftree_t ) );
if( p_media->i_id )
{
p_where_elt->criteria = ML_ID;
p_where_elt->value.i = p_media->i_id ;
p_where_elt->comp = ML_COMP_EQUAL;
p_where = ml_FtreeFastAnd( p_where, p_where_elt );
}
else if( p_media->psz_uri )
{
p_where_elt->criteria = ML_URI;
p_where_elt->value.str = p_media->psz_uri;
p_where_elt->comp = ML_COMP_EQUAL;
p_where = ml_FtreeFastAnd( p_where, p_where_elt );
}
else
{
goto quit1;
}
i_ret = Update( p_ml, ML_MEDIA, NULL, p_where, changes );
quit1:
ml_FreeFindTree( p_where );
for( int i = 0; i < vlc_array_count( changes ); i++ )
/* Note: DO NOT free the strings because
* they belong to the ml_media_t object */
free( vlc_array_item_at_index( changes, i ) );
vlc_array_destroy( changes );
ml_UnlockMedia( p_media );
return i_ret;
}
/**
* @brief Update an album's cover art
* @param p_ml The Media Library
* @param i_album_id Album's ID
* @param psz_cover New cover art
* @return VLC success/error code
**/
int SetArtCover( media_library_t *p_ml,
int i_album_id, const char *psz_cover )
{
assert( i_album_id != 0 );
assert( psz_cover != NULL );
char *psz_query = sql_Printf( p_ml->p_sys->p_sql,
"UPDATE album SET cover = %Q WHERE id = '%d'",
psz_cover, i_album_id );
if( !psz_query )
return VLC_ENOMEM;
if( QuerySimple( p_ml, "%s", psz_query ) != VLC_SUCCESS )
{
msg_Warn( p_ml, "Could not update the album's cover art "
"(Database error)" );
free( psz_query );
return VLC_EGENERIC;
}
free( psz_query );
return VLC_SUCCESS;
}