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[db] Don't zero play_count, skip_count, seek, time_played, time_skipped on update

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If a file gets updated/rescanned we generally don't want to reset the above
values. This commit adds DB_FLAG_NO_ZERO, which marks a field so that
db_file_update() will only update it if the new value is non-zero (i.e. the
caller probably has a "better" value).
This commit is contained in:
ejurgensen
2018-12-30 21:55:55 +01:00
parent 734b4e9851
commit 9929832b5f
2 changed files with 54 additions and 11 deletions
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37
sqlext/sqlext.c
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@@ -208,6 +208,34 @@ sqlext_daap_songalbumid_xfunc(sqlite3_context *pv, int n, sqlite3_value **ppv)
sqlite3_result_int64(pv, result);
}
static void
sqlext_daap_no_zero_xfunc(sqlite3_context *pv, int n, sqlite3_value **ppv)
{
sqlite3_int64 new_value;
sqlite3_int64 old_value;
if (n != 2)
{
sqlite3_result_error(pv, "daap_no_zero() requires 2 parameters, new_value and old_value", -1);
return;
}
if ((sqlite3_value_type(ppv[0]) != SQLITE_INTEGER)
|| (sqlite3_value_type(ppv[1]) != SQLITE_INTEGER))
{
sqlite3_result_error(pv, "daap_no_zero() requires 2 integer parameters", -1);
return;
}
new_value = sqlite3_value_int64(ppv[0]);
old_value = sqlite3_value_int64(ppv[1]);
if (new_value != 0)
sqlite3_result_int64(pv, new_value);
else
sqlite3_result_int64(pv, old_value);
}
static int
sqlext_daap_unicode_xcollation(void *notused, int llen, const void *left, int rlen, const void *right)
{
@@ -259,6 +287,15 @@ sqlite3_extension_init(sqlite3 *db, char **pzErrMsg, const sqlite3_api_routines
return -1;
}
ret = sqlite3_create_function(db, "daap_no_zero", 2, SQLITE_UTF8, NULL, sqlext_daap_no_zero_xfunc, NULL, NULL);
if (ret != SQLITE_OK)
{
if (pzErrMsg)
*pzErrMsg = sqlite3_mprintf("Could not create daap_no_zero function: %s\n", sqlite3_errmsg(db));
return -1;
}
ret = sqlite3_create_collation(db, "DAAP", SQLITE_UTF8, NULL, sqlext_daap_unicode_xcollation);
if (ret != SQLITE_OK)
{