Added browsing settings

public_html/js/BrowsingSettings.js

@@ -0,0 +1,86 @@
+var App = App || {};
+
+App.BrowsingSettings = function(
+	promise,
+	auth,
+	api) {
+
+	var settings = getDefaultSettings();
+
+	auth.startObservingLoginChanges('top-navigation', loginStateChanged);
+
+	readFromLocalStorage();
+	if (auth.isLoggedIn())
+		loginStateChanged();
+
+	function setSettings(newSettings) {
+		settings = newSettings;
+		return save();
+	}
+
+	function getSettings() {
+		return settings;
+	}
+
+	function getDefaultSettings() {
+		return {
+			hideDownvoted: true,
+			endlessScroll: true,
+			listPosts: {
+				safe: true,
+				sketchy: true,
+				unsafe: true,
+			},
+		};
+	}
+
+	function loginStateChanged() {
+		readFromUser(auth.getCurrentUser());
+	}
+
+	function readFromLocalStorage() {
+		readFromString(localStorage.getItem('browsingSettings'));
+	}
+
+	function readFromUser(user) {
+		readFromString(user.browsingSettings);
+	}
+
+	function readFromString(string) {
+		if (!string)
+			return;
+		try {
+			settings = JSON.parse(string);
+		} catch (e) {
+		}
+	}
+
+	function saveToLocalStorage() {
+		localStorage.setItem('browsingSettings', JSON.stringify(settings));
+	}
+
+	function saveToUser(user) {
+		var formData = {
+			browsingSettings: JSON.stringify(settings),
+		};
+		return api.put('/users/' + user.name, formData);
+	}
+
+	function save() {
+		return promise.make(function(resolve, reject) {
+			saveToLocalStorage();
+			if (auth.isLoggedIn()) {
+				saveToUser(auth.getCurrentUser()).then(resolve).fail(reject);
+			} else {
+				resolve();
+			}
+		});
+	}
+
+	return {
+		getSettings: getSettings,
+		setSettings: setSettings,
+	};
+}
+
+App.DI.registerSingleton('browsingSettings', App.BrowsingSettings);