PDO refactoring for code simplification (#2522)

* PDO refactor

* Automatic prefix when using the syntax `_tableName`
* Uniformity: MySQL is now PDO::ATTR_EMULATE_PREPARES = false just like SQLite and PostgreSQL, with consequences such as only one statement per query
* Use PDO methods exec(), query(), prepare() + execute() in a more efficient way
* Remove auto-update SQL code for versions older than FreshRSS 1.5 (3 years old)
* The name of the default category is set in PHP instead of in the DB (simplies SQL and allows changing the name according to the FreshRSS language)
* Rename `->bd` to `->pdo` (less of a frenshism, and more informative)
* Fix some requests, which were not compatible with MySQL prepared statements

* Whitespace

* Fix syntax for PostgreSQL sequences

+ MySQL install

* Minor formatting

* Fix lastInsertId for PostgreSQL

* Use PHP 5.6+ const

Take advantage of https://github.com/FreshRSS/FreshRSS/pull/2527
https://www.php.net/manual/en/migration56.new-features.php

* A bit of forgotten PHP 5.6 simplification for cURL

* Forgotten $s

* Mini fix custom user config

https://github.com/FreshRSS/FreshRSS/pull/2490/files#r326290346

* More work on install.php but not finished

* install.php working

* More cleaning of PDO in install

* Even more simplification

Take advantage of PDO->exec() to run multiple statements

* Disallow changing the name of the default category

https://github.com/FreshRSS/FreshRSS/pull/2522#discussion_r326967724

1 files changed, 9 insertions, 17 deletions

diff --git a/app/Models/DatabaseDAOSQLite.php b/app/Models/DatabaseDAOSQLite.php
index a93a209b2..11900979e 100644
--- a/app/Models/DatabaseDAOSQLite.php
+++ b/app/Models/DatabaseDAOSQLite.php
@@ -6,17 +6,16 @@
 class FreshRSS_DatabaseDAOSQLite extends FreshRSS_DatabaseDAO {
 	public function tablesAreCorrect() {
 		$sql = 'SELECT name FROM sqlite_master WHERE type="table"';
-		$stm = $this->bd->prepare($sql);
-		$stm->execute();
+		$stm = $this->pdo->query($sql);
 		$res = $stm->fetchAll(PDO::FETCH_ASSOC);
 
 		$tables = array(
-			'category' => false,
-			'feed' => false,
-			'entry' => false,
-			'entrytmp' => false,
-			'tag' => false,
-			'entrytag' => false,
+			$this->pdo->prefix() . 'category' => false,
+			$this->pdo->prefix() . 'feed' => false,
+			$this->pdo->prefix() . 'entry' => false,
+			$this->pdo->prefix() . 'entrytmp' => false,
+			$this->pdo->prefix() . 'tag' => false,
+			$this->pdo->prefix() . 'entrytag' => false,
 		);
 		foreach ($res as $value) {
 			$tables[$value['name']] = true;
@@ -27,9 +26,7 @@ class FreshRSS_DatabaseDAOSQLite extends FreshRSS_DatabaseDAO {
 
 	public function getSchema($table) {
 		$sql = 'PRAGMA table_info(' . $table . ')';
-		$stm = $this->bd->prepare($sql);
-		$stm->execute();
-
+		$stm = $this->pdo->query($sql);
 		return $this->listDaoToSchema($stm->fetchAll(PDO::FETCH_ASSOC));
 	}
 
@@ -61,11 +58,6 @@ class FreshRSS_DatabaseDAOSQLite extends FreshRSS_DatabaseDAO {
 	}
 
 	public function optimize() {
-		$sql = 'VACUUM';
-		$stm = $this->bd->prepare($sql);
-		if ($stm) {
-			return $stm->execute();
-		}
-		return false;
+		return $this->exec('VACUUM') !== false;
 	}
 }