From 566faa14760112f81eea78fe441d5adc1b872da1 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <fox@madoka.volgo-balt.ru>
Date: Tue, 27 Dec 2011 21:09:22 +0400
Subject: [PATCH] implement neutral-format personal data export

---
 cache/export/.empty      |  0
 classes/dlg.php          | 18 +++++++++
 classes/pref_feeds.php   | 21 +++++++----
 classes/rpc.php          | 79 +++++++++++++++++++++++++++++++++++++++-
 include/sanity_check.php |  8 ++++
 js/prefs.js              | 78 +++++++++++++++++++++++++++++++++++++++
 6 files changed, 196 insertions(+), 8 deletions(-)
 create mode 100755 cache/export/.empty

diff --git a/cache/export/.empty b/cache/export/.empty
new file mode 100755
index 000000000..e69de29bb
diff --git a/classes/dlg.php b/classes/dlg.php
index bd18f54dc..2d1cb9cc5 100644
--- a/classes/dlg.php
+++ b/classes/dlg.php
@@ -16,6 +16,24 @@ class Dlg extends Protected_Handler {
 		print "</dlg>";
 	}
 
+	function exportData() {
+
+		print "<p style='text-align : center' id='export_status_message'>You need to prepare exported data first by clicking the button below.</p>";
+
+		print "<div align='center'>";
+		print "<button dojoType=\"dijit.form.Button\"
+			onclick=\"dijit.byId('dataExportDlg').prepare()\">".
+			__('Prepare data')."</button>";
+
+		print "<button dojoType=\"dijit.form.Button\"
+			onclick=\"dijit.byId('dataExportDlg').hide()\">".
+			__('Close this window')."</button>";
+
+		print "</div>";
+
+
+	}
+
 	function importOpml() {
 		header("Content-Type: text/html"); # required for iframe
 
diff --git a/classes/pref_feeds.php b/classes/pref_feeds.php
index ed3783d67..f9ed1b554 100644
--- a/classes/pref_feeds.php
+++ b/classes/pref_feeds.php
@@ -1398,15 +1398,15 @@ class Pref_Feeds extends Protected_Handler {
 
 		print "</div>"; # feeds pane
 
-		print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('OPML')."\">";
+		print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Import and export')."\">";
+
+		print "<h2>" . __("OPML") . "</h2>";
+
+		print "<h3>" . __("Import") . "</h3>";
 
 		print "<p>" . __("Using OPML you can export and import your feeds, filters, labels and Tiny Tiny RSS settings.") . " ";
 
-		print "<span class=\"insensitive\">" . __("Note: Only main settings profile can be migrated using OPML.") . "</span>";
-
-		print "</p>";
-
-		print "<h3>" . __("Import") . "</h3>";
+		print __("Only main settings profile can be migrated using OPML.") . "</p>";
 
 		print "<br/><iframe id=\"upload_iframe\"
 			name=\"upload_iframe\" onload=\"opmlImportComplete(this)\"
@@ -1435,12 +1435,19 @@ class Pref_Feeds extends Protected_Handler {
 
 		print "<p>".__('Your OPML can be published publicly and can be subscribed by anyone who knows the URL below.') . " ";
 
-		print "<span class=\"insensitive\">" . __("Note: Published OPML does not include your Tiny Tiny RSS settings, feeds that require authentication or feeds hidden from Popular feeds.") . 			"</span>" . "</p>";
+		print __("Published OPML does not include your Tiny Tiny RSS settings, feeds that require authentication or feeds hidden from Popular feeds.") . "</p>";
 
 		print "<button dojoType=\"dijit.form.Button\" onclick=\"return displayDlg('pubOPMLUrl')\">".
 			__('Display URL')."</button> ";
 
 
+		print "<h2>" . __("Data Export") . "</h2>";
+
+		print "<p>" . __("You can export your Starred and Archived articles using database-neutral format for safekeeping.") . "</p>";
+
+		print "<button dojoType=\"dijit.form.Button\" onclick=\"return exportData()\">".
+			__('Export my data')."</button> ";
+
 		print "</div>"; # pane
 
 		if (strpos($_SERVER['HTTP_USER_AGENT'], "Firefox") !== false) {
diff --git a/classes/rpc.php b/classes/rpc.php
index 4cdaef935..497b1a55d 100644
--- a/classes/rpc.php
+++ b/classes/rpc.php
@@ -2,7 +2,7 @@
 class RPC extends Protected_Handler {
 
 	function csrf_ignore($method) {
-		$csrf_ignored = array("sanitycheck", "buttonplugin");
+		$csrf_ignored = array("sanitycheck", "buttonplugin", "exportget");
 
 		return array_search($method, $csrf_ignored) !== false;
 	}
@@ -14,6 +14,83 @@ class RPC extends Protected_Handler {
 		$_SESSION["prefs_cache"] = array();
 	}
 
+	function exportget() {
+		$exportname = CACHE_DIR . "/export/" .
+			sha1($_SESSION['uid'] . $_SESSION['login']) . ".xml";
+
+		if (file_exists($exportname)) {
+			header("Content-type: text/xml");
+			header("Content-Disposition: attachment; filename=TinyTinyRSS_exported.xml");
+
+			echo file_get_contents($exportname);
+		} else {
+			echo "File not found.";
+		}
+	}
+
+	function exportrun() {
+		$offset = (int) db_escape_string($_REQUEST['offset']);
+		$exported = 0;
+		$limit = 250;
+
+		if ($offset < 10000 && is_writable(CACHE_DIR . "/export")) {
+			$result = db_query($this->link, "SELECT
+					ttrss_entries.guid,
+					ttrss_entries.title,
+					content,
+					marked,
+					published,
+					score,
+					note,
+					tag_cache,
+					label_cache,
+					ttrss_feeds.title AS feed_title,
+					ttrss_feeds.feed_url AS feed_url,
+					ttrss_entries.updated
+				FROM
+					ttrss_user_entries LEFT JOIN ttrss_feeds ON (ttrss_feeds.id = feed_id),
+					ttrss_entries
+				WHERE
+					(marked = true OR feed_id IS NULL) AND
+					ref_id = ttrss_entries.id AND
+					ttrss_user_entries.owner_uid = " . $_SESSION['uid'] . "
+				ORDER BY ttrss_entries.id LIMIT $limit OFFSET $offset");
+
+			$exportname = sha1($_SESSION['uid'] . $_SESSION['login']);
+
+			if ($offset == 0) {
+				$fp = fopen(CACHE_DIR . "/export/$exportname.xml", "w");
+				fputs($fp, "<articles schema-version=\"".SCHEMA_VERSION."\">");
+			} else {
+				$fp = fopen(CACHE_DIR . "/export/$exportname.xml", "a");
+			}
+
+			if ($fp) {
+
+				while ($line = db_fetch_assoc($result)) {
+					fputs($fp, "<article>");
+
+					foreach ($line as $k => $v) {
+						fputs($fp, "<$k><![CDATA[$v]]></$k>");
+					}
+
+					fputs($fp, "</article>");
+				}
+
+				$exported = db_num_rows($result);
+
+				if ($exported < $limit && $exported > 0) {
+					fputs($fp, "</articles>");
+				}
+
+				fclose($fp);
+			}
+
+		}
+
+		print json_encode(array("exported" => $exported));
+	}
+
 	function remprofiles() {
 		$ids = explode(",", db_escape_string(trim($_REQUEST["ids"])));
 
diff --git a/include/sanity_check.php b/include/sanity_check.php
index c12c09334..4fe28c307 100644
--- a/include/sanity_check.php
+++ b/include/sanity_check.php
@@ -21,6 +21,14 @@
 			$err_msg = "HTMLPurifier cache directory should be writable by anyone (chmod -R 777 $purifier_cache_dir)";
 		}
 
+		if (!is_writable(CACHE_DIR . "/images")) {
+			$err_msg = "Image cache is not writable (chmod -R 777 ".CACHE_DIR."/images)";
+		}
+
+		if (!is_writable(CACHE_DIR . "/export")) {
+			$err_msg = "Data export cache is not writable (chmod -R 777 ".CACHE_DIR."/export)";
+		}
+
 		if (GENERATED_CONFIG_CHECK != EXPECTED_CONFIG_VERSION) {
 			$err_msg = "Configuration option checker sanity_config.php is outdated, please recreate it using ./utils/regen_config_checks.sh";
 		}
diff --git a/js/prefs.js b/js/prefs.js
index 27598285c..7f9e44ad5 100644
--- a/js/prefs.js
+++ b/js/prefs.js
@@ -1935,3 +1935,81 @@ function showHelp() {
 		exception_error("showHelp", e);
 	}
 }
+
+function exportData() {
+	try {
+
+		var query = "backend.php?op=dlg&method=exportData";
+
+		if (dijit.byId("dataExportDlg"))
+			dijit.byId("dataExportDlg").destroyRecursive();
+
+		var exported = 0;
+
+		dialog = new dijit.Dialog({
+			id: "dataExportDlg",
+			title: __("Export Data"),
+			style: "width: 600px",
+			prepare: function() {
+
+				notify_progress("Loading, please wait...");
+
+				new Ajax.Request("backend.php", {
+					parameters: "?op=rpc&method=exportrun&offset=" + exported,
+					onComplete: function(transport) {
+						try {
+							var rv = JSON.parse(transport.responseText);
+
+							if (rv && rv.exported != undefined) {
+								if (rv.exported > 0) {
+
+									exported += rv.exported;
+
+									$("export_status_message").innerHTML =
+										"<img src='images/indicator_tiny.gif'> " +
+										"Exported %d articles, please wait...".replace("%d",
+											exported);
+
+									setTimeout('dijit.byId("dataExportDlg").prepare()', 2000);
+
+								} else {
+
+									$("export_status_message").innerHTML =
+										__("Finished, exported %d articles. You can download the data <a class='visibleLink' href='%u'>here</a>.")
+										.replace("%d", exported)
+										.replace("%u", "backend.php?op=rpc&subop=exportget");
+
+									exported = 0;
+
+								}
+
+							} else {
+								$("export_status_message").innerHTML =
+									"Error occured, could not export data.";
+							}
+						} catch (e) {
+							exception_error("exportData", e, transport.responseText);
+						}
+
+						notify('');
+
+					} });
+
+			},
+			execute: function() {
+				if (this.validate()) {
+
+
+
+				}
+			},
+			href: query});
+
+		dialog.show();
+
+
+	} catch (e) {
+		exception_error("exportData", e);
+	}
+}
+