From e938b1de117cfde17a5773fe0c6fc92185c873fe Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <fox@madoka.volgo-balt.ru>
Date: Sun, 30 Dec 2012 13:36:40 +0400
Subject: rename plugin main class files

---
 plugins/instances/init.php | 398 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 398 insertions(+)
 create mode 100644 plugins/instances/init.php

(limited to 'plugins/instances/init.php')

diff --git a/plugins/instances/init.php b/plugins/instances/init.php
new file mode 100644
index 000000000..3acb163cc
--- /dev/null
+++ b/plugins/instances/init.php
@@ -0,0 +1,398 @@
+<?php
+class Instances extends Plugin implements IHandler {
+
+	private $link;
+	private $host;
+
+	private $status_codes = array(
+		0 	=> "Connection failed",
+		1 	=> "Success",
+		2 	=> "Invalid object received",
+		16	=> "Access denied" );
+
+	function about() {
+		return array(1.0,
+			"Support for linking tt-rss instances together and sharing popular feeds.",
+			"fox",
+			true);
+	}
+
+	function init($host) {
+		$this->link = $host->get_link();
+		$this->host = $host;
+
+		$host->add_hook($host::HOOK_PREFS_TABS, $this);
+		$host->add_handler("pref-instances", "*", $this);
+		$host->add_handler("public", "fbexport", $this);
+		$host->add_command("get-feeds", "receive popular feeds from linked instances", $this);
+		$host->add_hook($host::HOOK_UPDATE_TASK, $this);
+	}
+
+	function hook_update_task($args) {
+		_debug("Get linked feeds...");
+		$this->get_linked_feeds($this->link);
+	}
+
+	// Status codes:
+	// -1  - never connected
+	// 0   - no data received
+	// 1   - data received successfully
+	// 2   - did not receive valid data
+	// >10 - server error, code + 10 (e.g. 16 means server error 6)
+
+	function get_linked_feeds($link, $instance_id = false) {
+		if ($instance_id)
+			$instance_qpart = "id = '$instance_id' AND ";
+		else
+			$instance_qpart = "";
+
+		if (DB_TYPE == "pgsql") {
+			$date_qpart = "last_connected < NOW() - INTERVAL '6 hours'";
+		} else {
+			$date_qpart = "last_connected < DATE_SUB(NOW(), INTERVAL 6 HOUR)";
+		}
+
+		$result = db_query($link, "SELECT id, access_key, access_url FROM ttrss_linked_instances
+			WHERE $instance_qpart $date_qpart ORDER BY last_connected");
+
+		while ($line = db_fetch_assoc($result)) {
+			$id = $line['id'];
+
+			_debug("Updating: " . $line['access_url'] . " ($id)");
+
+			$fetch_url = $line['access_url'] . '/public.php?op=fbexport';
+			$post_query = 'key=' . $line['access_key'];
+
+			$feeds = fetch_file_contents($fetch_url, false, false, false, $post_query);
+
+			// try doing it the old way
+			if (!$feeds) {
+				$fetch_url = $line['access_url'] . '/backend.php?op=fbexport';
+				$feeds = fetch_file_contents($fetch_url, false, false, false, $post_query);
+			}
+
+			if ($feeds) {
+				$feeds = json_decode($feeds, true);
+
+				if ($feeds) {
+					if ($feeds['error']) {
+						$status = $feeds['error']['code'] + 10;
+
+						// access denied
+						if ($status == 16) {
+							db_query($link, "DELETE FROM ttrss_linked_feeds
+								WHERE instance_id = '$id'");
+						}
+					} else {
+						$status = 1;
+
+						if (count($feeds['feeds']) > 0) {
+
+							db_query($link, "DELETE FROM ttrss_linked_feeds
+								WHERE instance_id = '$id'");
+
+							foreach ($feeds['feeds'] as $feed) {
+								$feed_url = db_escape_string($feed['feed_url']);
+								$title = db_escape_string($feed['title']);
+								$subscribers = db_escape_string($feed['subscribers']);
+								$site_url = db_escape_string($feed['site_url']);
+
+								db_query($link, "INSERT INTO ttrss_linked_feeds
+									(feed_url, site_url, title, subscribers, instance_id, created, updated)
+								VALUES
+									('$feed_url', '$site_url', '$title', '$subscribers', '$id', NOW(), NOW())");
+							}
+						} else {
+							// received 0 feeds, this might indicate that
+							// the instance on the other hand is rebuilding feedbrowser cache
+							// we will try again later
+
+							// TODO: maybe perform expiration based on updated here?
+						}
+
+						_debug("Processed " . count($feeds['feeds']) . " feeds.");
+					}
+				} else {
+					$status = 2;
+				}
+
+			} else {
+				$status = 0;
+			}
+
+			_debug("Status: $status");
+
+			db_query($link, "UPDATE ttrss_linked_instances SET
+				last_status_out = '$status', last_connected = NOW() WHERE id = '$id'");
+
+		}
+	}
+
+
+	function get_feeds() {
+		$this->get_linked_feeds($this->link, false);
+	}
+
+	function get_prefs_js() {
+		return file_get_contents(dirname(__FILE__) . "/instances.js");
+	}
+
+	function hook_prefs_tabs($args) {
+		if ($_SESSION["access_level"] >= 10 || SINGLE_USER_MODE) {
+			?><div id="instanceConfigTab" dojoType="dijit.layout.ContentPane"
+			href="backend.php?op=pref-instances"
+			title="<?php echo __('Linked') ?>"></div><?php
+		}
+	}
+
+	function csrf_ignore($method) {
+		$csrf_ignored = array("index", "edit");
+
+		return array_search($method, $csrf_ignored) !== false;
+	}
+
+	function before($method) {
+		if ($_SESSION["uid"]) {
+			if ($_SESSION["access_level"] < 10) {
+				print __("Your access level is insufficient to open this tab.");
+				return false;
+			}
+			return true;
+		}
+		return false;
+	}
+
+	function after() {
+		return true;
+	}
+
+	function remove() {
+		$ids = db_escape_string($_REQUEST['ids']);
+
+		db_query($this->link, "DELETE FROM ttrss_linked_instances WHERE
+			id IN ($ids)");
+	}
+
+	function add() {
+		$id = db_escape_string($_REQUEST["id"]);
+		$access_url = db_escape_string($_REQUEST["access_url"]);
+		$access_key = db_escape_string($_REQUEST["access_key"]);
+
+		db_query($this->link, "BEGIN");
+
+		$result = db_query($this->link, "SELECT id FROM ttrss_linked_instances
+			WHERE access_url = '$access_url'");
+
+		if (db_num_rows($result) == 0) {
+			db_query($this->link, "INSERT INTO ttrss_linked_instances
+				(access_url, access_key, last_connected, last_status_in, last_status_out)
+				VALUES
+				('$access_url', '$access_key', '1970-01-01', -1, -1)");
+
+		}
+
+		db_query($this->link, "COMMIT");
+	}
+
+	function edit() {
+		$id = db_escape_string($_REQUEST["id"]);
+
+		$result = db_query($this->link, "SELECT * FROM ttrss_linked_instances WHERE
+			id = '$id'");
+
+		print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\"  name=\"id\" value=\"$id\">";
+		print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\"  name=\"op\" value=\"pref-instances\">";
+		print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\"  name=\"method\" value=\"editSave\">";
+
+		print "<div class=\"dlgSec\">".__("Instance")."</div>";
+
+		print "<div class=\"dlgSecCont\">";
+
+		/* URL */
+
+		$access_url = htmlspecialchars(db_fetch_result($result, 0, "access_url"));
+
+		print __("URL:") . " ";
+
+		print "<input dojoType=\"dijit.form.ValidationTextBox\" required=\"1\"
+			placeHolder=\"".__("Instance URL")."\"
+			regExp='^(http|https)://.*'
+			style=\"font-size : 16px; width: 20em\" name=\"access_url\"
+			value=\"$access_url\">";
+
+		print "<hr/>";
+
+		$access_key = htmlspecialchars(db_fetch_result($result, 0, "access_key"));
+
+		/* Access key */
+
+		print __("Access key:") . " ";
+
+		print "<input dojoType=\"dijit.form.ValidationTextBox\" required=\"1\"
+			placeHolder=\"".__("Access key")."\" regExp='\w{40}'
+			style=\"width: 20em\" name=\"access_key\" id=\"instance_edit_key\"
+			value=\"$access_key\">";
+
+		print "<p class='insensitive'>" . __("Use one access key for both linked instances.");
+
+		print "</div>";
+
+		print "<div class=\"dlgButtons\">
+			<div style='float : left'>
+				<button dojoType=\"dijit.form.Button\"
+					onclick=\"return dijit.byId('instanceEditDlg').regenKey()\">".
+					__('Generate new key')."</button>
+			</div>
+			<button dojoType=\"dijit.form.Button\"
+				onclick=\"return dijit.byId('instanceEditDlg').execute()\">".
+				__('Save')."</button>
+			<button dojoType=\"dijit.form.Button\"
+				onclick=\"return dijit.byId('instanceEditDlg').hide()\"\">".
+				__('Cancel')."</button></div>";
+
+	}
+
+	function editSave() {
+		$id = db_escape_string($_REQUEST["id"]);
+		$access_url = db_escape_string($_REQUEST["access_url"]);
+		$access_key = db_escape_string($_REQUEST["access_key"]);
+
+		db_query($this->link, "UPDATE ttrss_linked_instances SET
+			access_key = '$access_key', access_url = '$access_url',
+			last_connected = '1970-01-01'
+			WHERE id = '$id'");
+
+	}
+
+	function index() {
+
+		if (!function_exists('curl_init')) {
+			print "<div style='padding : 1em'>";
+			print_error("This functionality requires CURL functions. Please enable CURL in your PHP configuration (you might also want to disable open_basedir in php.ini) and reload this page.");
+			print "</div>";
+		}
+
+		print "<div id=\"pref-instance-wrap\" dojoType=\"dijit.layout.BorderContainer\" gutters=\"false\">";
+		print "<div id=\"pref-instance-header\" dojoType=\"dijit.layout.ContentPane\" region=\"top\">";
+
+		print "<div id=\"pref-instance-toolbar\" dojoType=\"dijit.Toolbar\">";
+
+		$sort = db_escape_string($_REQUEST["sort"]);
+
+		if (!$sort || $sort == "undefined") {
+			$sort = "access_url";
+		}
+
+		print "<div dojoType=\"dijit.form.DropDownButton\">".
+				"<span>" . __('Select')."</span>";
+		print "<div dojoType=\"dijit.Menu\" style=\"display: none;\">";
+		print "<div onclick=\"selectTableRows('prefInstanceList', 'all')\"
+			dojoType=\"dijit.MenuItem\">".__('All')."</div>";
+		print "<div onclick=\"selectTableRows('prefInstanceList', 'none')\"
+			dojoType=\"dijit.MenuItem\">".__('None')."</div>";
+		print "</div></div>";
+
+		print "<button dojoType=\"dijit.form.Button\" onclick=\"addInstance()\">".__('Link instance')."</button>";
+		print "<button dojoType=\"dijit.form.Button\" onclick=\"editSelectedInstance()\">".__('Edit')."</button>";
+		print "<button dojoType=\"dijit.form.Button\" onclick=\"removeSelectedInstances()\">".__('Remove')."</button>";
+
+		print "</div>"; #toolbar
+
+		$result = db_query($this->link, "SELECT *,
+			(SELECT COUNT(*) FROM ttrss_linked_feeds
+				WHERE instance_id = ttrss_linked_instances.id) AS num_feeds
+			FROM ttrss_linked_instances
+			ORDER BY $sort");
+
+		print "<p class=\"insensitive\" style='margin-left : 1em;'>" . __("You can connect other instances of Tiny Tiny RSS to this one to share Popular feeds. Link to this instance of Tiny Tiny RSS by using this URL:");
+
+		print " <a href=\"#\" onclick=\"alert('".htmlspecialchars(get_self_url_prefix())."')\">(display url)</a>";
+
+		print "<p><table width='100%' id='prefInstanceList' class='prefInstanceList' cellspacing='0'>";
+
+		print "<tr class=\"title\">
+			<td align='center' width=\"5%\">&nbsp;</td>
+			<td width=''><a href=\"#\" onclick=\"updateInstanceList('access_url')\">".__('Instance URL')."</a></td>
+			<td width='20%'><a href=\"#\" onclick=\"updateInstanceList('access_key')\">".__('Access key')."</a></td>
+			<td width='10%'><a href=\"#\" onclick=\"updateUsersList('last_connected')\">".__('Last connected')."</a></td>
+			<td width='10%'><a href=\"#\" onclick=\"updateUsersList('last_status_out')\">".__('Status')."</a></td>
+			<td width='10%'><a href=\"#\" onclick=\"updateUsersList('num_feeds')\">".__('Stored feeds')."</a></td>
+			</tr>";
+
+		$lnum = 0;
+
+		while ($line = db_fetch_assoc($result)) {
+			$class = ($lnum % 2) ? "even" : "odd";
+
+			$id = $line['id'];
+			$this_row_id = "id=\"LIRR-$id\"";
+
+			$line["last_connected"] = make_local_datetime($this->link, $line["last_connected"], false);
+
+			print "<tr class=\"$class\" $this_row_id>";
+
+			print "<td align='center'><input onclick='toggleSelectRow(this);'
+				type=\"checkbox\" id=\"LICHK-$id\"></td>";
+
+			$onclick = "onclick='editInstance($id, event)' title='".__('Click to edit')."'";
+
+			$access_key = mb_substr($line['access_key'], 0, 4) . '...' .
+				mb_substr($line['access_key'], -4);
+
+			print "<td $onclick>" . htmlspecialchars($line['access_url']) . "</td>";
+			print "<td $onclick>" . htmlspecialchars($access_key) . "</td>";
+			print "<td $onclick>" . htmlspecialchars($line['last_connected']) . "</td>";
+			print "<td $onclick>" . $this->status_codes[$line['last_status_out']] . "</td>";
+			print "<td $onclick>" . htmlspecialchars($line['num_feeds']) . "</td>";
+
+			print "</tr>";
+
+			++$lnum;
+		}
+
+		print "</table>";
+
+		print "</div>"; #pane
+
+		global $pluginhost;
+		$pluginhost->run_hooks($pluginhost::HOOK_PREFS_TAB,
+			"hook_prefs_tab", "prefInstances");
+
+		print "</div>"; #container
+
+	}
+
+	function fbexport() {
+
+		$access_key = db_escape_string($_POST["key"]);
+
+		// TODO: rate limit checking using last_connected
+		$result = db_query($this->link, "SELECT id FROM ttrss_linked_instances
+			WHERE access_key = '$access_key'");
+
+		if (db_num_rows($result) == 1) {
+
+			$instance_id = db_fetch_result($result, 0, "id");
+
+			$result = db_query($this->link, "SELECT feed_url, site_url, title, subscribers
+				FROM ttrss_feedbrowser_cache ORDER BY subscribers DESC LIMIT 100");
+
+			$feeds = array();
+
+			while ($line = db_fetch_assoc($result)) {
+				array_push($feeds, $line);
+			}
+
+			db_query($this->link, "UPDATE ttrss_linked_instances SET
+				last_status_in = 1 WHERE id = '$instance_id'");
+
+			print json_encode(array("feeds" => $feeds));
+		} else {
+			print json_encode(array("error" => array("code" => 6)));
+		}
+	}
+
+
+}
+?>
+
-- 
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