From acf08859483a609752b2c15a904ac69b35e87ea5 Mon Sep 17 00:00:00 2001
From: Marc Alexander <admin@m-a-styles.de>
Date: Tue, 25 May 2021 20:34:31 +0200
Subject: [PATCH] [ticket/16783] Add back data only backups

PHPBB3-16783
---
 phpBB/adm/style/acp_database.html   |  5 +++++
 phpBB/includes/acp/acp_database.php | 30 +++++++++++++++++++++++++++--
 phpBB/language/en/acp/database.php  |  1 -
 3 files changed, 33 insertions(+), 3 deletions(-)

diff --git a/phpBB/adm/style/acp_database.html b/phpBB/adm/style/acp_database.html
index 26bc563e5b..b0b7c54dbb 100644
--- a/phpBB/adm/style/acp_database.html
+++ b/phpBB/adm/style/acp_database.html
@@ -55,6 +55,11 @@
 
 	<fieldset>
 		<legend>{L_BACKUP_OPTIONS}</legend>
+	<dl>
+		<dt><label for="type">{L_BACKUP_TYPE}{L_COLON}</label></dt>
+		<dd><label><input type="radio" class="radio" name="type" value="full" id="type" checked="checked" /> {L_FULL_BACKUP}</label>
+			<label><input type="radio" class="radio" name="type" value="data" /> {L_DATA_ONLY}</label></dd>
+	</dl>
 	<dl>
 		<dt><label for="method">{L_FILE_TYPE}{L_COLON}</label></dt>
 		<dd><!-- BEGIN methods -->
diff --git a/phpBB/includes/acp/acp_database.php b/phpBB/includes/acp/acp_database.php
index 6d96d5bf8e..e320df2117 100644
--- a/phpBB/includes/acp/acp_database.php
+++ b/phpBB/includes/acp/acp_database.php
@@ -55,6 +55,7 @@ class acp_database
 				switch ($action)
 				{
 					case 'download':
+						$type	= $request->variable('type', '');
 						$table	= array_intersect($this->db_tools->sql_list_tables(), $request->variable('table', array('')));
 						$format	= $request->variable('method', '');
 
@@ -84,9 +85,34 @@ class acp_database
 						foreach ($table as $table_name)
 						{
 							// Get the table structure
-							$extractor->write_table($table_name);
+							if ($type == 'full')
+							{
+								$extractor->write_table($table_name);
+							}
+							else
+							{
+								// We might wanna empty out all that junk :D
+								switch ($db->get_sql_layer())
+								{
+									case 'sqlite3':
+										$extractor->flush('DELETE FROM ' . $table_name . ";\n");
+									break;
 
-							// Data
+									case 'mssql_odbc':
+									case 'mssqlnative':
+										$extractor->flush('TRUNCATE TABLE ' . $table_name . "GO\n");
+									break;
+
+									case 'oracle':
+										$extractor->flush('TRUNCATE TABLE ' . $table_name . "/\n");
+									break;
+
+									default:
+										$extractor->flush('TRUNCATE TABLE ' . $table_name . ";\n");
+								}
+							}
+
+							// Only supported types are full and data, therefore always write the data
 							$extractor->write_data($table_name);
 						}
 
diff --git a/phpBB/language/en/acp/database.php b/phpBB/language/en/acp/database.php
index 302aaee570..11acfe82d3 100644
--- a/phpBB/language/en/acp/database.php
+++ b/phpBB/language/en/acp/database.php
@@ -70,7 +70,6 @@ $lang = array_merge($lang, array(
 	'START_RESTORE'			=> 'Start restore',
 	'STORE_AND_DOWNLOAD'	=> 'Store and download',
 	'STORE_LOCAL'			=> 'Store file locally',
-	'STRUCTURE_ONLY'		=> 'Structure only',
 
 	'TABLE_SELECT'		=> 'Table select',
 	'TABLE_SELECT_ERROR'=> 'You must select at least one table.',