rework gears offline/online interaction the way it probably should be done (also remove redirecting login system)

functions.js

@@ -1508,7 +1508,7 @@ function fatalError(code, msg, ext_info) {
 		if (!ext_info) ext_info = "N/A";
 
 		if (code == 6) {
-			window.location.href = "login.php";			
+			window.location.href = "tt-rss.php";			
 		} else if (code == 5) {
 			window.location.href = "update.php";
 		} else {

functions.php

@@ -1918,8 +1918,8 @@
 			}
 
 			if (!$_SESSION["uid"] || !validate_session($link)) {
-				//render_login_form($link, $mobile);
+				render_login_form($link, $mobile);
-				header("Location: login.php");
+				//header("Location: login.php");
 				exit;
 			} else {
 				/* bump login timestamp */

offline.js

@@ -6,6 +6,7 @@ var localServer = false;
 var db = false;
 var articles_synced = 0;
 var sync_in_progress = false;
+var sync_timer = false;
 
 function view_offline(id, feed_id) {
 	try {
@@ -617,6 +618,8 @@ function offline_download_parse(stage, transport) {
 	try {
 		if (transport.responseXML) {
 
+			if (!sync_in_progress) return;
+
 			var sync_ok = transport.responseXML.getElementsByTagName("sync-ok");
 
 			if (sync_ok.length > 0) {
@@ -681,7 +684,7 @@ function offline_download_parse(stage, transport) {
 						[id, caption, fg_color, bg_color]);
 				}
 
-				window.setTimeout("update_offline_data("+(stage+1)+")", 1*1000);
+				sync_timer = window.setTimeout("update_offline_data("+(stage+1)+")", 10*1000);
 			} else {
 
 				var articles = transport.responseXML.getElementsByTagName("article");
@@ -731,11 +734,12 @@ function offline_download_parse(stage, transport) {
 				var has_sync_data = has_local_sync_data();
 
 				if (articles_found >= limit || has_sync_data) {
-					window.setTimeout("update_offline_data("+(stage+1)+")", 5*1000);
+					sync_timer = window.setTimeout("update_offline_data("+(stage+1)+")", 
+						5*1000);
 					debug("<b>update_offline_data: done " + stage + " HSD: " + 
 						has_sync_data + "</b>");
 				} else {
-					window.setTimeout("update_offline_data(0)", 180*1000);
+					window.setTimeout("offlineDownloadStart()", 180*1000);
 					debug("update_offline_data: finished");
 
 					var pic = $("offlineModePic");
@@ -1017,10 +1021,6 @@ function enable_offline_reading() {
 	try {
 
 		if (db && getInitParam("offline_enabled") == "1") {
-
-			store.manifestUrl = "manifest.json.php";
-			store.checkForUpdate();
-
 			init_local_sync_data();
 			Element.show("offlineModePic");
 			offlineDownloadStart();
@@ -1037,6 +1037,7 @@ function init_gears() {
 		if (window.google && google.gears) {
 			localServer = google.gears.factory.create("beta.localserver");
 			store = localServer.createManagedStore("tt-rss");
+			store.manifestUrl = "manifest.json.php";
 
 			db = google.gears.factory.create('beta.database');
 			db.open('tt-rss');
@@ -1126,12 +1127,32 @@ function init_gears() {
 }
 
 function gotoOffline() {
-	window.location.href = "tt-rss.php?offline=1";
+
+//	debug("[Local store] currentVersion = " + store.currentVersion);
+
+	if (confirm(__("Switch Tiny Tiny RSS into offline mode?"))) {
+
+		store.checkForUpdate();
+	
+		notify_progress("Preparing offline mode...");
+	
+		var timerId = window.setInterval(function() {
+			if (store.currentVersion) {
+				window.clearInterval(timerId);
+				//debug("[Local store] sync complete: " + store.currentVersion);
+				window.location.href = "tt-rss.php";
+			} else if (store.updateStatus == 3) {
+				debug("[Local store] sync error: " + store.lastErrorMessage);
+			} }, 500);
+	}
 }
 
 function gotoOnline() {
+	if (confirm(__("You won't be able to access offline version of Tiny Tiny RSS until you switch it into offline mode again. Go online?"))) {
+		localServer.removeManagedStore("tt-rss");
 		window.location.href = "tt-rss.php";
 	}
+}
 
 function local_collapse_cat(id) {
 	try {
@@ -1542,6 +1563,16 @@ function offlineDownloadStart() {
 	}
 }
 
+function offlineDownloadStop() {
+	try {
+		if (db && sync_in_progress && getInitParam("offline_enabled") == "1") {
+			window.clearTimeout(sync_timer);
+		}
+	} catch (e) {
+		exception_error("offlineDownloadStart", e);
+	}
+}
+
 function offlineClearData() {
 	try {
 		if (db) {
@@ -1564,3 +1595,13 @@ function offlineClearData() {
 		exception_error("offlineClearData", e);
 	}
 }
+
+function offlineUpdateStore() {
+	try {
+
+		if (offline_mode) return;
+
+	} catch (e) {
+		exception_error("offlineUpdateStore", e);
+	}
+}

tt-rss.js

@@ -132,18 +132,10 @@ function backend_sanity_check_callback(transport) {
 		}
 
 		if (!transport.responseXML) {
-			if (!window.google && !google.gears) {
 			fatalError(3, "Sanity check: Received reply is not XML", transport.responseText);
-			} else {
-				init_offline();
-			}
 			return;
 		}
 
-		if (getURLParam("offline")) {
-			return init_offline();
-		}
-
 		var reply = transport.responseXML.firstChild.firstChild;
 
 		if (!reply) {
@@ -405,10 +397,17 @@ function init() {
 
 		loading_set_progress(30);
 
+		offline_mode = false;
+		if (store) offline_mode = store.currentVersion;
+
+		if (offline_mode) {
+			init_offline();
+		} else {
 			new Ajax.Request("backend.php?op=rpc&subop=sanityCheck" + params,	{
 				onComplete: function(transport) {
 						backend_sanity_check_callback(transport);
 					} });
+		}
 
 	} catch (e) {
 		exception_error("init", e);

tt-rss.php

@@ -146,7 +146,7 @@ window.onload = init;
 		<div class="hideWhenSyncing"><a href="javascript:offlineClearData()">
 			<?php echo __('Remove offline data') ?></a></div>
 		<div><a href="javascript:gotoOffline()">
-			<?php echo __('Restart in offline mode') ?></a></div>
+			<?php echo __('Go offline') ?></a></div>
 	</div>
 
 	<img id="newVersionIcon" style="display:none;" onclick="javascript:explainError(2)" 
@@ -157,8 +157,7 @@ window.onload = init;
 
 	<span id="topLinksOffline" style="display : none">
 		<img id="restartOnlinePic" src="images/online.png" 
-			onclick="gotoOnline()"
+			onclick="gotoOnline()" title="<?php echo __('Go online') ?>"/>
-			title="<?php echo __('Restart in online mode') ?>"/>
 	</span>
 
 	</div>