xml import/export tools, UPGRADING, update README

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>