Render post dates with client-requested timezone

common.js

@@ -557,7 +557,13 @@ function pad(n) {
 }
 
 OS.readable_time = function (time) {
-	var d = new Date(time - new Date().getTimezoneOffset() * 60000);
+	var h = this.tz_offset;
+	var offset;
+	if (h || h == 0)
+		offset = h * 60 * 60 * 1000;
+	else /* would be nice not to construct new Dates all the time */
+		offset = new Date().getTimezoneOffset() * -60 * 1000;
+	var d = new Date(time + offset);
 	var k = "日月火水木金土"[d.getUTCDay()];
 	return (d.getUTCFullYear() + '/' + pad(d.getUTCMonth()+1) + '/' +
 		pad(d.getUTCDate()) + ' (' + k + ') ' +

deps.js

@@ -66,6 +66,7 @@ exports.SERVER_DEPS = [
 	'server/server.js',
 	'server/state.js',
 	'server/web.js',
+	'time/server.js',
 	'tripcode/tripcode.cc',
 	'voice/server.js',
 ];

server/render.js

@@ -19,6 +19,7 @@ function tamashii(num) {
 
 exports.write_thread_html = function (reader, req, out, opts) {
 	var oneeSama = new common.OneeSama(tamashii);
+	oneeSama.tz_offset = req.tz_offset;
 
 	opts.ident = req.ident;
 	caps.augment_oneesama(oneeSama, opts);

server/server.js

@@ -28,6 +28,7 @@ try {
 	if (reportConfig.RECAPTCHA_PUBLIC_KEY)
 		require('../report/server');
 } catch (e) {}
+require('../time/server');
 if (config.VOICE_PATH)
 	require('../voice/server');
 
@@ -325,6 +326,10 @@ web.resource(/^\/(\w+)\/$/, function (req, params, cb) {
 	if (!caps.can_ever_access_board(req.ident, board))
 		return cb(404);
 
+	// we don't do board etags yet
+	var info = {etag: 'dummy', req: req};
+	hooks.trigger_sync('buildETag', info);
+
 	cb(null, 'ok', {board: board});
 },
 function (req, resp) {
@@ -383,6 +388,10 @@ web.resource(/^\/(\w+)\/page(\d+)$/, function (req, params, cb) {
 		yaku.disconnect();
 	});
 	yaku.once('begin', function (threadCount) {
+		// we don't do board etags yet
+		var info = {etag: 'dummy', req: req};
+		hooks.trigger_sync('buildETag', info);
+
 		cb(null, 'ok', {
 			board: board, page: page, yaku: yaku,
 			threadCount: threadCount,
@@ -504,6 +513,11 @@ web.resource(/^\/(\w+)\/(\d+)$/, function (req, params, cb) {
 				etag += '-locked';
 			if (req.ident.auth)
 				etag += '-auth';
+
+			var info = {etag: etag, req: req};
+			hooks.trigger_sync('buildETag', info);
+			etag = info.etag;
+
 			if (req.headers['if-none-match'] === etag) {
 				yaku.disconnect();
 				return cb(null, 304);

time/client.js

@@ -25,6 +25,12 @@ function is_skewed() {
 
 if (is_skewed()) {
 	adjust_all_times();
+
+	setTimeout(function () {
+		// next request, have the server render the right times
+		var tz = -new Date().getTimezoneOffset() / 60;
+		$.cookie('timezone', tz, { expires: 90 });
+	}, 3000);
 }
 
 })();

time/server.js

@@ -0,0 +1,18 @@
+var hooks = require('../hooks');
+
+function parse_timezone(tz) {
+	if (!tz && tz != 0)
+		return null;
+	tz = parseInt(tz, 10);
+	if (isNaN(tz) || tz < -24 || tz > 24)
+		return null;
+	return tz;
+}
+
+hooks.hook_sync('buildETag', function (info) {
+	var tz = parse_timezone(info.req.cookies.timezone);
+	if (tz) {
+		info.req.tz_offset = tz;
+		info.etag += '-tz' + tz;
+	}
+});