Avoid unnecessary regeneration of dependencies.

[paraslash.git] / playlist.c

diff --git a/playlist.c b/playlist.c
index 9153bf1f849246379e68b4605c749474fce2c656..852ffd7a9724471798a6f6a376a2826c0f6961f5 100644 (file)
--- a/playlist.c
+++ b/playlist.c
@@ -1,7 +1,18 @@
+/*
+ * Copyright (C) 2007-2009 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+#include <regex.h>
+#include <osl.h>
+

 #include "para.h"
 #include "error.h"
 #include "para.h"
 #include "error.h"

-#include "afs.h"

 #include "string.h"
 #include "string.h"

+#include "afh.h"
+#include "afs.h"
+#include "ipc.h"

 
 /** \file playlist.c Functions for loading and saving playlists. */
 
 
 /** \file playlist.c Functions for loading and saving playlists. */
 


@@ -12,7 +23,7 @@ struct playlist_info {
        /** The number of entries currently in the playlist. */
        unsigned length;
 };
        /** The number of entries currently in the playlist. */
        unsigned length;
 };

-static struct playlist_info playlist;
+static struct playlist_info current_playlist;

 
 /**
  * Re-insert an audio file into the tree of admissible files.
 
 /**
  * Re-insert an audio file into the tree of admissible files.


@@ -21,83 +32,118 @@ static struct playlist_info playlist;
  *
  * \return The return value of score_update().
  */
  *
  * \return The return value of score_update().
  */

-int playlist_update_audio_file(struct osl_row *aft_row)
+static int playlist_update_audio_file(const struct osl_row *aft_row)

 {
        /* always re-insert to the top of the tree */
        return score_update(aft_row, 0);
 }
 
 {
        /* always re-insert to the top of the tree */
        return score_update(aft_row, 0);
 }
 

-static int add_playlist_entry(char *line, void *private_data)
+static int add_playlist_entry(char *path, void *data)

 {
 {

+       struct playlist_info *playlist = data;

        struct osl_row *aft_row;
        struct osl_row *aft_row;

-       struct playlist_info *pli = private_data;
-       int ret = aft_get_row_of_path(line, &aft_row);
+       int ret = aft_get_row_of_path(path, &aft_row);

 
        if (ret < 0) {
 
        if (ret < 0) {

-               PARA_NOTICE_LOG("path not found in audio file table: %s\n",
-                       line);
+               PARA_NOTICE_LOG("%s: %s\n", path, para_strerror(-ret));

                return 1;
        }
                return 1;
        }

-       ret = score_add(aft_row, -pli->length);
+       ret = score_add(aft_row, -playlist->length);

        if (ret < 0) {
        if (ret < 0) {

-               PARA_ERROR_LOG("failed to add %s: %d\n", line, ret);
+               PARA_ERROR_LOG("failed to add %s: %s\n", path, para_strerror(-ret));

                return ret;
        }
                return ret;
        }

-       pli->length++;
+       playlist->length++;

        return 1;
 }
 
        return 1;
 }
 

-static int load_playlist(struct osl_row *row)
+/* returns -E_PLAYLIST_LOADED on _success_ to terminate the loop */
+static int load_playlist(struct osl_row *row, void *data)

 {
 {

-       struct osl_object obj;
+       struct playlist_info *playlist = data;
+       struct osl_object playlist_def;
+       char *playlist_name;

        int ret;
 
        int ret;
 

-       ret = osl_get_object(playlists_table, row, BLOBCOL_NAME, &obj);
-       if (ret < 0)
-               return ret;
-       playlist.name = para_strdup(obj.data);
-       playlist.length = 0;
-       ret = osl_open_disk_object(playlists_table, row, BLOBCOL_DEF, &obj);
+       ret = pl_get_name_and_def_by_row(row, &playlist_name, &playlist_def);

        if (ret < 0)
                goto err;
        if (ret < 0)
                goto err;

-       ret = for_each_line_ro(obj.data, obj.size, add_playlist_entry,
-               &playlist);
-       osl_close_disk_object(&obj);
+       playlist->length = 0;
+       ret = for_each_line_ro(playlist_def.data, playlist_def.size,
+               add_playlist_entry, playlist);
+       osl_close_disk_object(&playlist_def);

        if (ret < 0)
                goto err;
        ret = -E_PLAYLIST_EMPTY;
        if (ret < 0)
                goto err;
        ret = -E_PLAYLIST_EMPTY;

-       if (!playlist.length)
+       if (!playlist->length)

                goto err;
                goto err;

-       PARA_NOTICE_LOG("loaded playlist %s (%u files)\n", playlist.name,
-               playlist.length);
-       return 1;
+       playlist->name = para_strdup(playlist_name);
+       PARA_NOTICE_LOG("loaded playlist %s (%u files)\n", playlist->name,
+               playlist->length);
+       return -E_PLAYLIST_LOADED;

 err:
 err:

-       free(playlist.name);
-       return ret;
+       if (ret != -E_DUMMY_ROW)
+               PARA_NOTICE_LOG("unable to load playlist (%s)\n",
+                       para_strerror(-ret));
+       return 1;

 }
 
 }
 

-/* returns -E_PLAYLIST_LOADED on _success_ to terminate the loop */
-static int playlist_loop(struct osl_row *row, __a_unused void *private_data)
+static int check_playlist_path(char *path, void *data)

 {
 {

-       int ret = load_playlist(row);
-       if (ret < 0) {
-               if (ret != -E_DUMMY_ROW)
-                       PARA_NOTICE_LOG("unable to load playlist, trying next\n");
+       struct para_buffer *pb = data;
+       struct osl_row *aft_row;
+       int ret = aft_get_row_of_path(path, &aft_row);
+
+       if (ret >= 0)

                return 1;
                return 1;

+       return para_printf(pb, "%s: %s\n", path, para_strerror(-ret));
+}
+
+static int check_playlist(struct osl_row *row, void *data)
+{
+       struct para_buffer *pb = data;
+       struct osl_object playlist_def;
+       char *playlist_name;
+       int ret = pl_get_name_and_def_by_row(row, &playlist_name, &playlist_def);
+
+       if (ret < 0)
+               return para_printf(pb, "failed to get playlist data: %s\n",
+                       para_strerror(-ret));
+       if (*playlist_name) { /* skip dummy row */
+               ret = para_printf(pb, "checking playlist %s...\n", playlist_name);
+               if (ret < 0)
+                       return ret;
+               ret = for_each_line_ro(playlist_def.data, playlist_def.size,
+                       check_playlist_path, pb);

        }
        }

-       return -E_PLAYLIST_LOADED;
+       osl_close_disk_object(&playlist_def);
+       return ret;

 }
 
 }
 

-static int load_first_available_playlist(void)
+/**
+ * Check the playlist table for inconsistencies.
+ *
+ * \param fd The afs socket.
+ * \param query Unused.
+ *
+ * \return The return value of the underlying call to osl_rbtree_loop().
+ */
+void playlist_check_callback(int fd, __a_unused const struct osl_object *query)

 {
 {

-       int ret = osl_rbtree_loop(playlists_table, BLOBCOL_NAME, NULL,
-               playlist_loop);
-       if (ret == -E_PLAYLIST_LOADED) /* success */
-               return 1;
+       struct para_buffer pb = {
+               .max_size = SHMMAX,
+               .private_data = &fd,
+               .max_size_handler = pass_buffer_as_shm
+       };
+       int ret = para_printf(&pb, "checking playlists...\n");
+

        if (ret < 0)
        if (ret < 0)

-               return ret; /* error */
-       PARA_NOTICE_LOG("no valid playlist found\n");
-       return -E_NO_PLAYLIST;
+               return;
+       osl_rbtree_loop(playlists_table, BLOBCOL_ID, &pb,
+               check_playlist);
+       if (pb.offset)
+               pass_buffer_as_shm(pb.buf, pb.offset, &fd);
+       free(pb.buf);

 }
 
 /**
 }
 
 /**


@@ -107,8 +153,10 @@ static int load_first_available_playlist(void)
  */
 void playlist_close(void)
 {
  */
 void playlist_close(void)
 {

-       free(playlist.name);
-       playlist.name = NULL;
+       if (!current_playlist.name)
+               return;
+       free(current_playlist.name);
+       current_playlist.name = NULL;

 }
 
 /**
 }
 
 /**


@@ -116,12 +164,10 @@ void playlist_close(void)
  *
  * \param name The name of the playlist to open.
  *
  *
  * \param name The name of the playlist to open.
  *

- * If name is \p NULL, load the first available playlist. Files which are
- * listed in the playlist, but not contained in the database are ignored.
- * This is not considered an error.
+ * Files which are listed in the playlist, but not contained in the database
+ * are ignored.  This is not considered an error.

  *
  *

- * \return Positive on success, negative on errors. Possible errors
- * include: Given playlist not found, -E_NO_PLAYLIST (no playlist defined).
+ * \return Standard.

  */
 int playlist_open(char *name)
 {
  */
 int playlist_open(char *name)
 {


@@ -129,14 +175,93 @@ int playlist_open(char *name)
        int ret;
        struct osl_row *row;
 
        int ret;
        struct osl_row *row;
 

-       if (!name)
-               return load_first_available_playlist();

        obj.data = name;
        obj.size = strlen(obj.data);
        obj.data = name;
        obj.size = strlen(obj.data);

-       ret = osl_get_row(playlists_table, BLOBCOL_NAME, &obj, &row);
+       ret = osl(osl_get_row(playlists_table, BLOBCOL_NAME, &obj, &row));

        if (ret < 0) {
                PARA_NOTICE_LOG("failed to load playlist %s\n", name);
                return ret;
        }
        if (ret < 0) {
                PARA_NOTICE_LOG("failed to load playlist %s\n", name);
                return ret;
        }

-       return load_playlist(row);
+       playlist_close();
+       ret = load_playlist(row, &current_playlist);
+       return (ret == -E_PLAYLIST_LOADED)? current_playlist.length : ret;
+}
+
+static int search_path(char *path, void *data)
+{
+       if (strcmp(path, data))
+               return 1;
+       return -E_PATH_FOUND;
+}
+
+static int handle_audio_file_event(enum afs_events event, void *data)
+{
+       int ret, was_admissible = 0, is_admissible;
+       struct osl_object playlist_def;
+       char *new_path;
+       const struct osl_row *row = data;
+
+       if (!current_playlist.name)
+               return 1;
+       if (event == AUDIO_FILE_RENAME) {
+               ret = row_belongs_to_score_table(row, NULL);
+               if (ret < 0)
+                       return ret;
+               was_admissible = ret;
+       }
+       ret = get_audio_file_path_of_row(row, &new_path);
+       if (ret < 0)
+               return ret;
+       ret = pl_get_def_by_name(current_playlist.name, &playlist_def);
+       if (ret < 0)
+               return ret;
+       ret = for_each_line_ro(playlist_def.data, playlist_def.size,
+               search_path, new_path);
+       osl_close_disk_object(&playlist_def);
+       is_admissible = (ret < 0);
+       if (was_admissible && is_admissible)
+               return 1;
+       if (!was_admissible && !is_admissible)
+               return 1;
+       if (was_admissible && !is_admissible) {
+               current_playlist.length--;
+               return score_delete(row);
+       }
+       /* !was_admissible && is_admissible */
+       current_playlist.length++;
+       return score_add(row, 0); /* play it immediately */
+}
+
+/**
+ * Handle afs events relevant to playlists.
+ *
+ * \param event The event type.
+ * \param pb Unused.
+ * \param data Depends on the event type.
+ *
+ * \return Standard.
+ */
+int playlists_event_handler(enum afs_events event,
+       __a_unused struct para_buffer *pb, void *data)
+{
+       int ret;
+       struct afsi_change_event_data *aced = data;
+
+       switch(event) {
+       case AFSI_CHANGE:
+               return playlist_update_audio_file(aced->aft_row);
+       case AUDIO_FILE_RENAME:
+       case AUDIO_FILE_ADD:
+               return handle_audio_file_event(event, data);
+       case AUDIO_FILE_REMOVE:
+               ret = row_belongs_to_score_table(data, NULL);
+               if (ret < 0)
+                       return ret;
+               if (!ret)
+                       return 1;
+               current_playlist.length--;
+               return score_delete(data);
+       default:
+               return 1;
+       }

 }
 }