musictree.c

#include <glib.h>
#include <stdlib.h>
#include <string.h>

static void foreach_file(const gchar * song_dir_path, const gchar * regex);
static gboolean path_go_up(char * song_dir_path);
static void find_in_musictree(const gchar * song_file_path, const gchar * regex, gint up_to);

//---------------------------------------------------

// -> stringlib.c
gboolean regex_match(const gchar * string, const gchar * regex)
{
    gboolean retv = FALSE;
    if(string != NULL)
    {
        if(regex == NULL)
            return TRUE;

        retv = g_regex_match_simple(regex, string, G_REGEX_CASELESS, G_REGEX_MATCH_NOTEMPTY);
    }
    return retv;
}

//---------------------------------------------------

// -> utils.c
gboolean is_file(const gchar * song_path_dir, const gchar * elem_name)
{
    gchar * absolute_path = g_strdup_printf("%s%c%s",song_path_dir,G_DIR_SEPARATOR,elem_name);
    gboolean retv = g_file_test(absolute_path,G_FILE_TEST_IS_REGULAR);
    g_free(absolute_path);
    return retv;  
}


//---------------------------------------------------

static void foreach_file(const gchar * song_dir_path, const gchar * regex)
{
    if(song_dir_path != NULL)
    {
        GError * dir_error = NULL;
        GDir * song_dir = g_dir_open(song_dir_path,0,&dir_error);
        if(song_dir != NULL)
        {
            const gchar * entry = NULL;
            while((entry = g_dir_read_name(song_dir)) != NULL)
            {
                if(regex_match(entry,regex) == TRUE)
                {
                    g_printerr("%s\n",entry);

                }
            }
            g_dir_close(song_dir);
        }
        else
        {
            g_printerr("Opening %s failed: %s\n",song_dir_path,dir_error->message);
            g_error_free(dir_error);
        }
    }
}

//---------------------------------------------------

static gboolean path_go_up(char * song_dir_path)
{
    if(song_dir_path != NULL)
    {
        gchar * sep = strrchr(song_dir_path,G_DIR_SEPARATOR);
        if(sep != NULL && sep != song_dir_path)
        {
            *sep = 0;
            return TRUE;
        }

        if(sep != NULL && sep == song_dir_path)
        {
            sep[1] = 0;
            return TRUE;
        }
    }

    return FALSE;
}

//---------------------------------------------------

static void find_in_musictree(const gchar * song_file_path, const gchar * regex, gint up_to)
{
    gchar * song_dir_path = g_path_get_dirname(song_file_path);
    if(song_dir_path != NULL)
    {
        for(gint i = 0; i < up_to; ++i)
        {
            g_printerr("---> Path = %s\n",song_dir_path);
            foreach_file(song_dir_path,regex);
            if(path_go_up(song_dir_path) == FALSE)
                break;
        }
        g_free(song_dir_path);
    }
}

//---------------------------------------------------

// TODO: escape artist for regex and 

int main(int argc, char *argv[])
{
    gchar * music_dir = "/home/chris/HD/Musik/Apocalyptica/Cult/01 Path";
    if(argc > 1)
    {
        music_dir = argv[1];
    }

    find_in_musictree(music_dir,"^(<artist>|artist)\\.(jpg|png|jpeg|gif)$",3);
    return EXIT_SUCCESS;
}