Warn before overwriting another playlist on disk

When saving a playlist to an existing file on disk,
warn user, unless the playlist's file name remains
unchanged.

Change-Id: I10d82667de5fadb5323be4f981bea9263849f07a

apps/menus/playlist_menu.c

@@ -65,18 +65,10 @@ int save_playlist_screen(struct playlist_info* playlist)
         strlcat(temp, DEFAULT_DYNAMIC_PLAYLIST_NAME, sizeof(temp));
     }
 
-    dot = strrchr(temp, '.');
-    if (dot) /* remove extension */
-       *dot = '\0';
-
-    if (!kbd_input(temp, sizeof(temp), NULL))
+    if (catalog_pick_new_playlist_name(temp, sizeof(temp),
+                                       playlist ? playlist->filename :
+                                       playlist_get_current()->filename))
     {
-        len = strlen(temp);
-        if(len > 4 && !strcasecmp(&temp[len-4], ".m3u"))
-            strlcat(temp, "8", sizeof(temp));
-        else if(len <= 5 || strcasecmp(&temp[len-5], ".m3u8"))
-            strlcat(temp, ".m3u8", sizeof(temp));
-
         playlist_save(playlist, temp, NULL, 0);
 
         /* reload in case playlist was saved to cwd */

apps/misc.c

@@ -1227,6 +1227,13 @@ int confirm_delete_yesno(const char *name)
     return gui_syncyesno_run(&message, &yes_message, NULL);
 }
 
+int confirm_overwrite_yesno(void)
+{
+    static const char *lines[] = { ID2P(LANG_REALLY_OVERWRITE) };
+    static const struct text_message message = { lines, 1 };
+    return gui_syncyesno_run(&message, NULL, NULL);
+}
+
 /*  time_split_units()
     split time values depending on base unit
     unit_idx: UNIT_HOUR, UNIT_MIN, UNIT_SEC, UNIT_MS

apps/misc.h

@@ -159,6 +159,7 @@ int hex_to_rgb(const char* hex, int* color);
 #endif
 
 int confirm_delete_yesno(const char *name);
+int confirm_overwrite_yesno(void);
 
 char* strrsplt(char* str, int c);
 char* skip_whitespace(char* const str);

apps/onplay.c

@@ -948,13 +948,6 @@ static bool poll_cancel_action(const char *path)
     return ACTION_STD_CANCEL == get_action(CONTEXT_STD, TIMEOUT_NOBLOCK);
 }
 
-static int confirm_overwrite(void)
-{
-    static const char *lines[] = { ID2P(LANG_REALLY_OVERWRITE) };
-    static const struct text_message message = { lines, 1 };
-    return gui_syncyesno_run(&message, NULL, NULL);
-}
-
 static bool check_new_name(const char *basename)
 {
     /* at least prevent escapes out of the base directory from keyboard-
@@ -1426,7 +1419,7 @@ static int clipboard_paste(void)
     case RELATE_DIFFERENT:
         if (file_exists(target.path)) {
             /* If user chooses not to overwrite, cancel */
-            if (confirm_overwrite() == YESNO_NO) {
+            if (confirm_overwrite_yesno() == YESNO_NO) {
                 rc = OPRC_NOOVERWRT;
                 break;
             }

apps/playlist_catalog.c

@@ -389,6 +389,43 @@ bool catalog_view_playlists(void)
     return (display_playlists(NULL, CATBROWSE_CATVIEW) >= 0);
 }
 
+static void apply_playlist_extension(char* buf, size_t buf_size)
+{
+    size_t len = strlen(buf);
+    if(len > 4 && !strcasecmp(&buf[len-4], ".m3u"))
+        strlcat(buf, "8", buf_size);
+    else if(len <= 5 || strcasecmp(&buf[len-5], ".m3u8"))
+        strlcat(buf, ".m3u8", buf_size);
+}
+
+static int remove_extension(char* path)
+{
+    char *dot = strrchr(path, '.');
+    if (dot)
+       *dot = '\0';
+
+    return 0;
+}
+
+
+bool catalog_pick_new_playlist_name(char *pl_name, size_t buf_size,
+                                    const char* curr_pl_name)
+{
+    bool do_save = false;
+    while (!do_save && !remove_extension(pl_name) &&
+           !kbd_input(pl_name, buf_size - 7, NULL))
+    {
+        do_save = true;
+        apply_playlist_extension(pl_name, buf_size);
+
+        /* warn before overwriting existing (different) playlist */
+        if ((!curr_pl_name || strcmp(curr_pl_name, pl_name)) &&
+            file_exists(pl_name))
+            do_save = confirm_overwrite_yesno() == YESNO_YES;
+    }
+    return do_save;
+}
+
 static int (*ctx_add_to_playlist)(const char* playlist, bool new_playlist);
 bool catalog_add_to_a_playlist(const char* sel, int sel_attr,
                                bool new_playlist, char *m3u8name,
@@ -404,7 +441,6 @@ bool catalog_add_to_a_playlist(const char* sel, int sel_attr,
 
     if (new_playlist)
     {
-        size_t len;
         if (m3u8name == NULL)
         {
             const char *name;
@@ -425,14 +461,10 @@ bool catalog_add_to_a_playlist(const char* sel, int sel_attr,
         else
             strmemccpy(playlist, m3u8name, MAX_PATH);
 
-        if (kbd_input(playlist, MAX_PATH, NULL))
+        apply_playlist_extension(playlist, sizeof(playlist));
+        
+        if (!catalog_pick_new_playlist_name(playlist, sizeof(playlist), NULL))
             return false;
-
-        len = strlen(playlist);
-        if(len > 4 && !strcasecmp(&playlist[len-4], ".m3u"))
-            strlcat(playlist, "8", sizeof(playlist));
-        else if(len <= 5 || strcasecmp(&playlist[len-5], ".m3u8"))
-            strlcat(playlist, ".m3u8", sizeof(playlist));
     }
     else
     {

apps/playlist_catalog.h

@@ -33,6 +33,9 @@ void catalog_set_directory(const char* directory);
  */
 bool catalog_view_playlists(void);
 
+bool catalog_pick_new_playlist_name(char *pl_name, size_t buf_size,
+                                    const char* curr_pl_name);
+
 /* 
  * Add something to a playlist (new or select from list of playlists in
  * catalog).