classes/dbupdater.php

   1 <?php
   2 class DbUpdater {
   3
   4         private $pdo;
   5         private $db_type;
   6         private $need_version;
   7
   8         function __construct($pdo, $db_type, $need_version) {
   9                 $this->pdo = Db::pdo(); //$pdo;
  10                 $this->db_type = $db_type;
  11                 $this->need_version = (int) $need_version;
  12         }
  13
  14         function getSchemaVersion() {
  15                 $row = $this->pdo->query("SELECT schema_version FROM ttrss_version")->fetch();
  16                 return (int) $row['schema_version'];
  17         }
  18
  19         function isUpdateRequired() {
  20                 return $this->getSchemaVersion() < $this->need_version;
  21         }
  22
  23         function getSchemaLines($version) {
  24                 $filename = "schema/versions/".$this->db_type."/$version.sql";
  25
  26                 if (file_exists($filename)) {
  27                         return explode(";", preg_replace("/[\r\n]/", "", file_get_contents($filename)));
  28                 } else {
  29                         user_error("DB Updater: schema file for version $version is not found.");
  30                         return false;
  31                 }
  32         }
  33
  34         function performUpdateTo($version, $html_output = true) {
  35                 if ($this->getSchemaVersion() == $version - 1) {
  36
  37                         $lines = $this->getSchemaLines($version);
  38
  39                         if (is_array($lines)) {
  40
  41                                 $this->pdo->beginTransaction();
  42
  43                                 foreach ($lines as $line) {
  44                                         if (strpos($line, "--") !== 0 && $line) {
  45                                                 if (!$this->pdo->query($line)) {
  46                                                         if ($html_output) {
  47                                                                 print_notice("Query: $line");
  48                                                                 print_error("Error: " . implode(", ", $this->pdo->errorInfo()));
  49                                                         } else {
  50                                                                 Debug::log("Query: $line");
  51                                                                 Debug::log("Error: " . implode(", ", $this->pdo->errorInfo()));
  52                                                         }
  53
  54                                                         return false;
  55                                                 }
  56                                         }
  57                                 }
  58
  59                                 $db_version = $this->getSchemaVersion();
  60
  61                                 if ($db_version == $version) {
  62                                         $this->pdo->commit();
  63                                         return true;
  64                                 } else {
  65                                         $this->pdo->rollBack();
  66                                         return false;
  67                                 }
  68                         } else {
  69                                 return false;
  70                         }
  71                 } else {
  72                         return false;
  73                 }
  74         }
  75
  76 }