Automated build for v0.01

classes/dbupdater.php

@@ -0,0 +1,83 @@
+<?php
+class DbUpdater {
+
+	private $pdo;
+	private $db_type;
+	private $need_version;
+
+	function __construct($pdo, $db_type, $need_version) {
+		$this->pdo = Db::pdo(); //$pdo;
+		$this->db_type = $db_type;
+		$this->need_version = (int) $need_version;
+	}
+
+	function getSchemaVersion() {
+		$row = $this->pdo->query("SELECT schema_version FROM ttrss_version")->fetch();
+		return (int) $row['schema_version'];
+	}
+
+	function isUpdateRequired() {
+		return $this->getSchemaVersion() < $this->need_version;
+	}
+
+	function getSchemaLines($version) {
+		$filename = "schema/versions/".$this->db_type."/$version.sql";
+
+		if (file_exists($filename)) {
+			return explode(";", preg_replace("/[\r\n]/", "", file_get_contents($filename)));
+		} else {
+			user_error("DB Updater: schema file for version $version is not found.");
+			return false;
+		}
+	}
+
+	function performUpdateTo($version, $html_output = true) {
+		if ($this->getSchemaVersion() == $version - 1) {
+
+			$lines = $this->getSchemaLines($version);
+
+			if (is_array($lines)) {
+
+				$this->pdo->beginTransaction();
+
+				foreach ($lines as $line) {
+					if (strpos($line, "--") !== 0 && $line) {
+
+						if ($html_output)
+							print "<pre>$line</pre>";
+						else
+							Debug::log("> $line");
+
+						try {
+							$this->pdo->query($line); // PDO returns errors as exceptions now
+						} catch (PDOException $e) {
+							if ($html_output) {
+								print "<div class='text-error'>Error: " . $e->getMessage() . "</div>";
+							} else {
+								Debug::log("Error: " . $e->getMessage());
+							}
+
+							$this->pdo->rollBack();
+							return false;
+						}
+					}
+				}
+
+				$db_version = $this->getSchemaVersion();
+
+				if ($db_version == $version) {
+					$this->pdo->commit();
+					return true;
+				} else {
+					$this->pdo->rollBack();
+					return false;
+				}
+			} else {
+				return false;
+			}
+		} else {
+			return false;
+		}
+	}
+
+}