xml import/export tools, UPGRADING, update README

5 files changed, 288 insertions, 2 deletions

diff --git a/NEWS b/NEWS
index 1a527c336..01d1a89d5 100644
--- a/NEWS
+++ b/NEWS
@@ -1,7 +1,6 @@
 v1.1		(Dec xy, 2005)
 
-	Note: there is no update path from 1.0.7, the schema is just too
-	different. Sorry about that.
+	! Please read UPGRADING for upgrade instructions from version 1.0.7 !
 
 	* Multi-user support (yay!)
 	* Per-feed purge preferences (0 means default, negative numbers disable purging)
diff --git a/README b/README
index 55ce000e6..01bb0d26b 100644
--- a/README
+++ b/README
@@ -1,6 +1,8 @@
 Tiny Tiny RSS
 =============
 
+! Please read UPGRADING for upgrade instructions from version 1.0.7 !
+
 Web-based news feed aggregator, designed to allow you to read news from 
 any location, while feeling as close to a real desktop application as possible.
 
diff --git a/UPGRADING b/UPGRADING
new file mode 100644
index 000000000..968acf683
--- /dev/null
+++ b/UPGRADING
@@ -0,0 +1,19 @@
+= Upgrading from TT-RSS 1.0.7 =
+
+There is, unfortunately, no direct database schema upgrade script. Starred articles
+and feed subscriptions may be transferred the following way:
+
+== 1.0.7 ==
+
+ * Export your feed subscriptions to OPML
+ * Copy xml-export.php from TT-RSS 1.1 tarball to your 1.0.7 directory and run it. This script exports your starred articles in neutral XML format.
+ * Save resulting XML file somewhere
+
+Unpack and configure TT-RSS 1.1. You may need to remove old tables manualy 
+(or choose the different database, etc.)
+
+== 1.1 ==
+
+ * Import your feeds OPML
+ * Run xml-import.php and import your old starred articles
+
diff --git a/xml-export.php b/xml-export.php
new file mode 100644
index 000000000..13ab65b9d
--- /dev/null
+++ b/xml-export.php
@@ -0,0 +1,82 @@
+<?
+	/*
+		Exports your starred articles in schema-neutral XML format.
+	*/
+
+	require_once "config.php";
+	require_once "functions.php";
+	require_once "db.php";
+
+	define('SCHEMA_VERSION', 1);
+	
+	header("Content-Type: application/xml");
+?>
+
+<xmldb>
+
+<?
+	$link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);	
+
+	if (!$link) {
+		if (DB_TYPE == "mysql") {
+			print mysql_error();
+		}
+		// PG seems to display its own errors just fine by default.		
+		return;
+	}
+
+	if (DB_TYPE == "pgsql") {
+		pg_query("set client_encoding = 'utf-8'");
+	}
+
+	$result = db_query($link, "SELECT schema_version FROM ttrss_version");
+
+	$schema_version = db_fetch_result($result, 0, "schema_version");
+
+	if ($schema_version != SCHEMA_VERSION) {
+		print "Error: database schema is invalid
+			(got version $schema_version; expected ".SCHEMA_VERSION.")";
+		return;
+	}
+
+	print "<schema_version>$schema_version</schema_version>";
+
+?>
+
+<articles>
+
+<?
+	$result = db_query($link, "SELECT
+			ttrss_entries.title AS title,
+			content,
+			marked,
+			unread,
+			updated,
+			guid,
+			link,
+			date_entered,
+			last_read,
+			comments,
+			ttrss_feeds.feed_url AS feed_url,
+			ttrss_feeds.title AS feed_title
+		FROM 
+			ttrss_entries,ttrss_feeds
+		WHERE
+			feed_id = ttrss_feeds.id AND marked = true");
+
+
+	while ($line = db_fetch_assoc($result)) {
+		print "<article>";
+
+		foreach (array_keys($line) as $key) {
+			print "<$key><![CDATA[".$line[$key]."]]></$key>";
+
+		}
+
+		print "</article>";
+	}
+
+?>
+</articles>
+
+</xmldb>
diff --git a/xml-import.php b/xml-import.php
new file mode 100644
index 000000000..aacdd60bd
--- /dev/null
+++ b/xml-import.php
@@ -0,0 +1,184 @@
+<?
+	require_once "config.php";
+	require_once "functions.php";
+	require_once "db.php";
+
+	define('SOURCE_SCHEMA_VERSION', 1);
+	define('TARGET_SCHEMA_VERSION', 2);
+
+	$link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);	
+
+	login_sequence($link);
+
+	if (!$link) {
+		if (DB_TYPE == "mysql") {
+			print mysql_error();
+		}
+		// PG seems to display its own errors just fine by default.		
+		return;
+	}
+
+	if (DB_TYPE == "pgsql") {
+		pg_query("set client_encoding = 'utf-8'");
+	}
+
+	$result = db_query($link, "SELECT schema_version FROM ttrss_version");
+
+	$schema_version = db_fetch_result($result, 0, "schema_version");
+
+	if ($schema_version != TARGET_SCHEMA_VERSION) {
+		print "Error: database schema is invalid
+			(got version $schema_version; expected ".TARGET_SCHEMA_VERSION.")";
+		return;
+	}
+
+	function import_article($link, $data) {
+
+		print "Processing article " . $data["title"] . "<br>";
+
+		$owner_uid = $_SESSION["uid"];
+
+		db_query($link, "BEGIN");
+
+		$result = db_query($link, "SELECT id FROM ttrss_feeds WHERE feed_url = '".
+			$data["feed_url"] . "' AND owner_uid = '$owner_uid'");
+
+		if (db_num_rows($result) == 0) {
+			return false;
+		}
+
+		$feed_id = db_fetch_result($result, 0, "id");		
+
+		$result = db_query($link, "SELECT id FROM ttrss_entries WHERE
+			guid = '".$data["guid"]."'");
+
+		if (db_num_rows($result) == 0) {
+
+			print "Not found, adding base entry...<br>";
+
+			$entry_title = $data["title"];
+			$entry_guid = $data["guid"];
+			$entry_link = $data["link"];
+			$updated = $data["updated"];
+			$date_entered = $data["date_entered"];
+			$entry_content = $data["content"];
+			$content_hash = "SHA1:" . sha1(strip_tags($entry_content));
+			$entry_comments = $data["comments"];
+
+			$result = db_query($link,
+				"INSERT INTO ttrss_entries 
+					(title,
+					guid,
+					link,
+					updated,
+					content,
+					content_hash,
+					no_orig_date,
+					date_entered,
+					comments)
+				VALUES
+					('$entry_title', 
+					'$entry_guid', 
+					'$entry_link',
+					'$updated', 
+					'$entry_content', 
+					'$content_hash',
+					false, 
+					'$date_entered', 
+					'$entry_comments')");
+		}
+
+		$result = db_query($link, "SELECT id FROM ttrss_entries WHERE
+			guid = '".$data["guid"]."'");
+
+		if (db_num_rows($result) == 0) { return false; }
+
+		$entry_id = db_fetch_result($result, 0, "id");
+
+		print "Found base ID: $entry_id<br>";
+
+		$result = db_query($link, "SELECT int_id FROM ttrss_user_entries WHERE
+			ref_id = '$entry_id'");
+
+		if (db_num_rows($result) == 0) {
+			print "User table entry not found, creating...<br>";
+
+			$unread = $data["unread"];
+			$marked = $data["marked"];
+			$last_read = $data["last_read"];
+
+			if (!$last_read) {
+				$last_read_qpart = 'NULL';
+			} else {
+				$last_read_qpart = "'$last_read'";
+			}
+
+			$result = db_query($link,
+				"INSERT INTO ttrss_user_entries 
+					(ref_id, owner_uid, feed_id, unread, marked, last_read) 
+				VALUES ('$entry_id', '$owner_uid', '$feed_id', '$unread', '$marked',
+					$last_read_qpart)");
+
+		} else {
+			print "User table entry already exists, nothing to do.<br>";
+		}
+
+		db_query($link, "COMMIT");
+
+	}
+
+?>
+<html>
+<body>
+
+	<? if ($_REQUEST["op"] != "Import") { ?>
+
+	<h1>Import XMLDB (your login is <?= $_SESSION["login"] ?>)</h1>
+
+	<form	enctype="multipart/form-data" method="POST" action="xml-import.php">
+	File: <input name="xmldb" type="file">&nbsp;
+	<input class="button" name="op" type="submit" value="Import">
+	</form>
+
+	<? } else {
+
+		print "<h1>Importing data (your login is ".$_SESSION["name"].")</h1>";
+
+		if (is_file($_FILES['xmldb']['tmp_name'])) {
+			$dom = domxml_open_file($_FILES['xmldb']['tmp_name']);
+//			$dom = domxml_open_file('xmldb.xml');
+
+			if ($dom) {
+				$root = $dom->document_element();
+
+				$schema_version = $root->get_elements_by_tagname('schema_version');
+				$schema_version = $schema_version[0]->get_content();
+
+				if ($schema_version != SOURCE_SCHEMA_VERSION) {
+					die("Incorrect source schema version");
+				}
+
+				$articles = $root->get_elements_by_tagname("article");
+
+				foreach ($articles as $article) {
+					$child_nodes = $article->child_nodes();
+
+					$article_data = array();
+
+					foreach ($child_nodes as $child) {
+						$article_data[$child->tagname()] = $child->get_content();
+					}
+
+					import_article($link, $article_data);
+				}
+			} else {
+				print "Error: could not parse document.";
+			}
+		} else {
+			print "<p>Error: please upload XMLDB.</p>";
+		}
+
+	} ?>
+</body>
+</html>
+