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msd2/phpBB3/phpbb/db/extractor/sqlite3_extractor.php

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+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\extractor;
+
+use phpbb\db\extractor\exception\extractor_not_initialized_exception;
+
+class sqlite3_extractor extends base_extractor
+{
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_start($table_prefix)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql_data = "--\n";
+		$sql_data .= "-- phpBB Backup Script\n";
+		$sql_data .= "-- Dump of tables for $table_prefix\n";
+		$sql_data .= "-- DATE : " . gmdate("d-m-Y H:i:s", $this->time) . " GMT\n";
+		$sql_data .= "--\n";
+		$sql_data .= "BEGIN TRANSACTION;\n";
+		$this->flush($sql_data);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_table($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql_data = '-- Table: ' . $table_name . "\n";
+		$sql_data .= "DROP TABLE $table_name;\n";
+
+		$sql = "SELECT sql
+			FROM sqlite_master
+			WHERE type = 'table'
+				AND name = '" . $this->db->sql_escape($table_name) . "'
+			ORDER BY name ASC;";
+		$result = $this->db->sql_query($sql);
+		$row = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		// Create Table
+		$sql_data .= $row['sql'] . ";\n";
+
+		$result = $this->db->sql_query("PRAGMA index_list('" . $this->db->sql_escape($table_name) . "');");
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if (strpos($row['name'], 'autoindex') !== false)
+			{
+				continue;
+			}
+
+			$result2 = $this->db->sql_query("PRAGMA index_info('" . $this->db->sql_escape($row['name']) . "');");
+
+			$fields = array();
+			while ($row2 = $this->db->sql_fetchrow($result2))
+			{
+				$fields[] = $row2['name'];
+			}
+			$this->db->sql_freeresult($result2);
+
+			$sql_data .= 'CREATE ' . ($row['unique'] ? 'UNIQUE ' : '') . 'INDEX ' . $row['name'] . ' ON ' . $table_name . ' (' . implode(', ', $fields) . ");\n";
+		}
+		$this->db->sql_freeresult($result);
+
+		$this->flush($sql_data . "\n");
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_data($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$result = $this->db->sql_query("PRAGMA table_info('" . $this->db->sql_escape($table_name) . "');");
+
+		$col_types = array();
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$col_types[$row['name']] = $row['type'];
+		}
+		$this->db->sql_freeresult($result);
+
+		$sql_insert = 'INSERT INTO ' . $table_name . ' (' . implode(', ', array_keys($col_types)) . ') VALUES (';
+
+		$sql = "SELECT *
+			FROM $table_name";
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			foreach ($row as $column_name => $column_data)
+			{
+				if (is_null($column_data))
+				{
+					$row[$column_name] = 'NULL';
+				}
+				else if ($column_data === '')
+				{
+					$row[$column_name] = "''";
+				}
+				else if (stripos($col_types[$column_name], 'text') !== false || stripos($col_types[$column_name], 'char') !== false || stripos($col_types[$column_name], 'blob') !== false)
+				{
+					$row[$column_name] = sanitize_data_generic(str_replace("'", "''", $column_data));
+				}
+			}
+			$this->flush($sql_insert . implode(', ', $row) . ");\n");
+		}
+	}
+
+	/**
+	* Writes closing line(s) to database backup
+	*
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	public function write_end()
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$this->flush("COMMIT;\n");
+		parent::write_end();
+	}
+}