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, 7 insertions, 13 deletions

diff --git a/p/api/greader.php b/p/api/greader.php
index b6777796a..77e498524 100644
--- a/p/api/greader.php
+++ b/p/api/greader.php
@@ -76,12 +76,6 @@ function multiplePosts($name) {	//https://bugs.php.net/bug.php?id=51633
 	return $result;
 }
 
-class MyPDO extends Minz_ModelPdo {
-	function prepare($sql) {
-		return $this->bd->prepare(str_replace('%_', $this->prefix, $sql));
-	}
-}
-
 function debugInfo() {
 	if (function_exists('getallheaders')) {
 		$ALL_HEADERS = getallheaders();
@@ -239,9 +233,8 @@ function userInfo() {	//https://github.com/theoldreader/api#user-info
 function tagList() {
 	header('Content-Type: application/json; charset=UTF-8');
 
-	$pdo = new MyPDO();
-	$stm = $pdo->prepare('SELECT c.name FROM `%_category` c');
-	$stm->execute();
+	$model = new Minz_ModelPdo();
+	$stm = $model->pdo->query('SELECT c.name FROM `_category` c');
 	$res = $stm->fetchAll(PDO::FETCH_COLUMN, 0);
 
 	$tags = array(
@@ -277,10 +270,11 @@ function tagList() {
 function subscriptionList() {
 	header('Content-Type: application/json; charset=UTF-8');
 
-	$pdo = new MyPDO();
-	$stm = $pdo->prepare('SELECT f.id, f.name, f.url, f.website, c.id as c_id, c.name as c_name FROM `%_feed` f
-		INNER JOIN `%_category` c ON c.id = f.category AND f.priority >= :priority_normal');
-	$stm->execute(array(':priority_normal' => FreshRSS_Feed::PRIORITY_NORMAL));
+	$model = new Minz_ModelPdo();
+	$stm = $model->pdo->prepare('SELECT f.id, f.name, f.url, f.website, c.id as c_id, c.name as c_name FROM `_feed` f
+		INNER JOIN `_category` c ON c.id = f.category AND f.priority >= :priority_normal');
+	$stm->bindValue(':priority_normal', FreshRSS_Feed::PRIORITY_NORMAL, PDO::PARAM_INT);
+	$stm->execute();
 	$res = $stm->fetchAll(PDO::FETCH_ASSOC);
 
 	$salt = FreshRSS_Context::$system_conf->salt;