Add priority to activity cards

client/src/activities_view.vala

@@ -1,134 +1,107 @@
 namespace StudySystemClient {
 	public class ActivitiesView : Gtk.Box {
 		private Client client;
+		private Gtk.FlowBox card_container;
+		private RefreshingIndicator refreshing_indicator;
 
 		public ActivitiesView(Client client)  {
-			margin_top = margin_bottom = margin_start = margin_end = 0;
+			Object(orientation: Gtk.Orientation.VERTICAL,
+				   hexpand: true,
+				   vexpand: true,
+				   margin_top: 0,
+				   margin_bottom: 0,
+				   margin_start: 0,
+				   margin_end: 0);
+
 			this.client = client;
 
-			var scrolled_window = new Gtk.ScrolledWindow();
-			scrolled_window.hscrollbar_policy = Gtk.PolicyType.NEVER;
-			scrolled_window.vexpand = true;
-
-			var card_container = new Gtk.FlowBox();
+			card_container = new Gtk.FlowBox();
 			card_container.homogeneous = true;
 			card_container.min_children_per_line = 1;
 			card_container.max_children_per_line = 1;
 			card_container.selection_mode = Gtk.SelectionMode.NONE;
 			card_container.valign = Gtk.Align.START;
+
+			var scrolled_window = new Gtk.ScrolledWindow();
+			scrolled_window.hscrollbar_policy = Gtk.PolicyType.NEVER;
+			scrolled_window.hexpand = true;
+			scrolled_window.vexpand = true;
 			scrolled_window.add_css_class("card-container");
-
-			var activities = new Activity[] {
-				{ "Linguistics", ActivityType.EXERCISES },
-				{ "Cybernetics", ActivityType.EXERCISES },
-				{ "Linguistics", ActivityType.READING },
-				{ "Physics", ActivityType.READING },
-				{ "Cybernetics", ActivityType.READING },
-				{ "Physics", ActivityType.EXERCISES },
-			};
-			foreach (var activity in activities) {
-				var card = new ActivityCard(activity);
-				card.session_logged.connect(log_session);
-				card_container.append(card);
-			}
-
 			scrolled_window.set_child(card_container);
-			this.append(scrolled_window);
+
+			var overlay = new Gtk.Overlay();
+			overlay.hexpand = overlay.vexpand = true;
+			overlay.set_child(scrolled_window);
+			this.append(overlay);
+
+			refreshing_indicator = new RefreshingIndicator(overlay);
+
+			this.map.connect(refresh);
+		}
+
+		private async void refresh() {
+			refreshing_indicator.show();
+			try {
+				var activities = yield client.list_activities();
+				card_container.remove_all();
+				foreach (var activity in activities) {
+					var card = new ActivityCard(activity);
+					card.session_logged.connect(log_session);
+					card_container.append(card);
+				}
+			} catch (ClientError e) {
+				stderr.printf("Error refreshing activities: %s\n",
+							  e.message);
+			}
+			refreshing_indicator.hide();
 		}
 
 		private async void log_session(string subject, ActivityType type,
 									   int minutes) {
 			try {
 				yield client.log_session(subject, type, minutes);
-				stderr.printf("Successfully logged session\n");
+				yield refresh();
 			} catch (ClientError e) {
 				stderr.printf("Error logging session: %s\n", e.message);
 			}
 		}
 	}
 
-	private class ActivityCard : Gtk.Frame {
-		public signal void session_logged(string subject, ActivityType type,
-										  int minutes);
+	private class RefreshingIndicator {
+		private Gtk.Overlay overlay;
+		private Gtk.Frame frame;
 
-		public ActivityCard(Activity activity) {
-			add_css_class("card");
+		public RefreshingIndicator(Gtk.Overlay overlay) {
+			this.overlay = overlay;
 
-			var content = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 12);
-
-			var text = new Gtk.Box(Gtk.Orientation.VERTICAL, 6);
-			text.hexpand = true;
-
-			var subject = new Gtk.Label(activity.subject);
-			subject.halign = Gtk.Align.START;
-			subject.add_css_class("activity-subject");
-			text.append(subject);
-
-			var type = new Gtk.Label(activity.type.to_string());
-			type.halign = Gtk.Align.START;
-			text.append(type);
-
-			content.append(text);
-
-			var button
-				= new Gtk.Button.from_icon_name("appointment-new-symbolic");
-			button.vexpand = false;
-			button.valign = Gtk.Align.CENTER;
-			button.set_tooltip_text("Log session");
-			button.add_css_class("log-session-button");
-			content.append(button);
-
-			set_child(content);
-
-			var log_session_popover = new LogSessionPopover();
-			log_session_popover.set_parent(button);
-			button.clicked.connect(() => log_session_popover.popup());
-			log_session_popover.session_logged.connect((minutes) => {
-					session_logged(activity.subject, activity.type, minutes);
-				});
-		}
-	}
-
-	private class LogSessionPopover : Gtk.Popover {
-		public signal void session_logged(int minutes);
-
-		private const int DEFAULT_LENGTH = 30;
-
-		private Gtk.SpinButton input;
-
-		public LogSessionPopover() {
-			var content = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 6);
-
-			var label = new Gtk.Label("Minutes");
+			var label = new Gtk.Label("Refreshing");
 			label.halign = Gtk.Align.START;
+
+			var spinner = new Gtk.Spinner();
+			spinner.start();
+
+			var content = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 6);
+			content.margin_top = content.margin_bottom
+				= content.margin_start = content.margin_end = 12;
 			content.append(label);
+			content.append(spinner);
 
-			var adjustment
-				= new Gtk.Adjustment(DEFAULT_LENGTH, 10, 480, 10, 10, 0);
-			input = new Gtk.SpinButton(adjustment, 1, 0);
-			input.numeric = true;
-			content.append(input);
+			frame = new Gtk.Frame(null);
+			frame.halign = Gtk.Align.CENTER;
+			frame.valign = Gtk.Align.START;
+			frame.add_css_class("osd");
+			frame.add_css_class("popdown");
+			frame.set_child(content);
 
-			var button = new Gtk.Button.from_icon_name("emblem-ok-symbolic");
-			button.halign = Gtk.Align.END;
-			button.set_tooltip_text("Submit");
-			button.add_css_class("suggested-action");
-			button.clicked.connect(submit);
-			content.append(button);
-
-			set_child(content);
-
-			closed.connect(reset);
+			overlay.add_overlay(frame);
 		}
 
-		private void submit() {
-			session_logged((int)input.value);
-			reset();
-			popdown();
+		public void show() {
+			frame.add_css_class("visible");
 		}
 
-		private void reset() {
-			input.value = DEFAULT_LENGTH;
+		public void hide() {
+			frame.remove_css_class("visible");
 		}
 	}
 }

client/src/activity_card.vala

@@ -0,0 +1,94 @@
+namespace StudySystemClient {
+	public class ActivityCard : Gtk.Frame {
+		public signal void session_logged(string subject, ActivityType type,
+										  int minutes);
+
+		public ActivityCard(Activity activity) {
+			add_css_class("card");
+
+			var subject = new Gtk.Label(activity.subject);
+			subject.halign = Gtk.Align.START;
+			subject.add_css_class("activity-subject");
+
+			var type = new Gtk.Label(activity.type.to_string());
+			type.add_css_class("activity-type");
+			var separator = new Gtk.Label("·");
+			separator.add_css_class("activity-priority");
+			var priority = new Gtk.Label("%0.2f".printf(activity.priority));
+			priority.add_css_class("activity-priority");
+
+			var details = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 6);
+			details.append(type);
+			details.append(separator);
+			details.append(priority);
+
+			var text = new Gtk.Box(Gtk.Orientation.VERTICAL, 6);
+			text.hexpand = true;
+			text.append(subject);
+			text.append(details);
+
+			var content = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 12);
+			content.append(text);
+
+			var button
+				= new Gtk.Button.from_icon_name("appointment-new-symbolic");
+			button.vexpand = false;
+			button.valign = Gtk.Align.CENTER;
+			button.set_tooltip_text("Log session");
+			button.add_css_class("log-session-button");
+			content.append(button);
+
+			set_child(content);
+
+			var log_session_popover = new LogSessionPopover();
+			log_session_popover.set_parent(button);
+			button.clicked.connect(() => log_session_popover.popup());
+			log_session_popover.session_logged.connect((minutes) => {
+					session_logged(activity.subject, activity.type, minutes);
+				});
+		}
+	}
+
+	private class LogSessionPopover : Gtk.Popover {
+		public signal void session_logged(int minutes);
+
+		private const int DEFAULT_LENGTH = 30;
+
+		private Gtk.SpinButton input;
+
+		public LogSessionPopover() {
+			var content = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 6);
+
+			var label = new Gtk.Label("Minutes");
+			label.halign = Gtk.Align.START;
+			content.append(label);
+
+			var adjustment
+				= new Gtk.Adjustment(DEFAULT_LENGTH, 10, 480, 10, 10, 0);
+			input = new Gtk.SpinButton(adjustment, 1, 0);
+			input.numeric = true;
+			content.append(input);
+
+			var button = new Gtk.Button.from_icon_name("emblem-ok-symbolic");
+			button.halign = Gtk.Align.END;
+			button.set_tooltip_text("Submit");
+			button.add_css_class("suggested-action");
+			button.clicked.connect(submit);
+			content.append(button);
+
+			set_child(content);
+
+			closed.connect(reset);
+		}
+
+		private void submit() {
+			session_logged((int)input.value);
+			reset();
+			popdown();
+		}
+
+		private void reset() {
+			input.value = DEFAULT_LENGTH;
+		}
+	}
+}

client/src/meson.build

@@ -10,8 +10,9 @@ configure_file(
 lib = library(
   'study-system-client',
   sources: files(
-    'activity.vala',
     'activities_view.vala',
+    'activity.vala',
+    'activity_card.vala',
     'client.vala',
     'connection.vala',
     'der.vala',

client/src/response.vala

@@ -40,7 +40,7 @@ namespace StudySystemClient.Response {
 		protected enum Tag {
 			ERROR = 0,
 			ACK = 1,
-			PRIORITIZED_ACTIVITIES = 2,
+			ACTIVITIES = 2,
 		}
 
 		internal static Body from_datum(Der.Datum datum) throws DecodeError {
@@ -54,9 +54,8 @@ namespace StudySystemClient.Response {
 				return new Error.from_datum(choice.value);
 			case Tag.ACK:
 				return new Ack.from_datum(choice.value);
-			case Tag.PRIORITIZED_ACTIVITIES:
-				throw new DecodeError.NOT_IMPLEMENTED(
-					"PrioritizedActivities not yet implemented");
+			case Tag.ACTIVITIES:
+				return new Activities.from_datum(choice.value);
 			default:
 				throw new DecodeError.INVALID_BODY(
 					"Invalid ResponseBody tag");

client/src/session_manager.vala

@@ -65,7 +65,7 @@ namespace StudySystemClient {
 	public class SessionFactory {
 		private const string CA_FILENAME = "/ca.pem";
 		private const string CERT_FILENAME = "/client.pem";
-		private const uint TIMEOUT_S = 5;
+		private const uint TIMEOUT_S = 1;
 
 		private InetSocketAddress host;
 		private TlsCertificate cert;

client/styles.css

@@ -14,6 +14,10 @@
 	font-weight: bold;
 }
 
+.activity-priority {
+	color: alpha(@theme_fg_color, 0.6);
+}
+
 /*
  * The visual center (i.e. the center of the clock) of the
  * "appointment-new-symbolic" icon is slightly displaced from the
@@ -23,3 +27,20 @@
 	margin-top: -2px;
 	margin-left: 3px;
 }
+
+/*
+ * Couldn't find a built-in way to get the common OSD overlay style of
+ * rounding the bottom corners but not the top ones, so doing this
+ * myself with this CSS rule.
+ */
+overlay > frame.osd {
+	border-radius: 0 0 8px 8px;
+}
+
+.popdown {
+	transition: transform 200ms ease-in-out;
+	transform: translateY(-100px);
+}
+.popdown.visible {
+	transform: translateY(0);
+}

server/src/session_server.erl

@@ -63,12 +63,18 @@ handle_request(Request) ->
 
 map_request({ping, 'NULL'}) ->
 	{response, {ack, 'NULL'}};
+map_request({listActivities, 'NULL'}) ->
+	{activities, Activities} = subject_router:get_activities(),
+	SortedActivities = lists:reverse(lists:keysort(3, Activities)),
+	{response, {activities,
+				[{'Activity', Subject, Type, round(Priority * 100)}
+				 || {Subject, Type, Priority} <- SortedActivities]}};
 map_request({logSession, {'Session', Subject, Type, Timestamp, Minutes}}) ->
 	Session = {unicode:characters_to_list(Subject),
 			   Type, Timestamp, Minutes},
 	case subject_router:log_session(Session) of
 		ok -> {response, {ack, 'NULL'}};
-		{error, invalid_subject} -> {response, {error, invalidArguments}}
+		{error, _Error} -> {response, {error, invalidArguments}}
 	end;
 map_request(_) ->
 	{response, {error, invalidArguments}}.

server/src/subject_router.erl

@@ -4,7 +4,7 @@
 -module(subject_router).
 -behaviour(gen_server).
 
--export([start_link/0, log_session/1]).
+-export([start_link/0, log_session/1, get_activities/0]).
 -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
 		 terminate/2, code_change/3]).
 
@@ -14,6 +14,9 @@ start_link() ->
 log_session(Session) ->
 	gen_server:call(?MODULE, {log_session, Session}).
 
+get_activities() ->
+	gen_server:call(?MODULE, get_activities).
+
 init([]) ->
 	{MonitorRef, Pids} = pg:monitor(study_system_server, subject_servers),
 	SubjectTable = ets:new(subject_table, [private]),
@@ -25,11 +28,19 @@ handle_call({log_session, {Subject, Type, Timestamp, Minutes}},
 			_From, State = #{subject_table := SubjectTable}) ->
 	case ets:lookup(SubjectTable, Subject) of
 		[{Subject, Pid}] ->
-			Pid ! {new_session, Type, Timestamp, Minutes},
-			{reply, ok, State};
+			{reply,
+			 subject_server:log_session(Pid, Type, Timestamp, Minutes),
+			 State};
 		[] ->
 			{reply, {error, invalid_subject}, State}
 	end;
+handle_call(get_activities, _From,
+			State = #{subject_table := SubjectTable}) ->
+	Pids = lists:flatten(ets:match(SubjectTable, {'_', '$1'})),
+	Activities = lists:flatmap(
+				   fun(Pid) -> subject_server:get_activities(Pid) end,
+				   Pids),
+	{reply, {activities, Activities}, State};
 handle_call(_Request, _From, State) ->
 	{reply, ok, State}.
 
@@ -62,7 +73,7 @@ register_servers(SubjectTable, Pids) ->
 
 register_server(SubjectTable, Pid) ->
 	try
-		{subject, Subject} = gen_server:call(Pid, get_subject),
+		{subject, Subject} = subject_server:get_subject(Pid),
 		ets:insert(SubjectTable, {Subject, Pid})
 	catch
 		_:_ -> ok

server/src/subject_server.erl

@@ -4,31 +4,52 @@
 -module(subject_server).
 -behaviour(gen_server).
 
--export([start_link/1]).
+-export([start_link/1, get_subject/1, get_activities/1, log_session/4]).
 -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
 		 terminate/2, code_change/3]).
 
 start_link(Subject) ->
 	gen_server:start_link(?MODULE, Subject, []).
 
+get_subject(Pid) ->
+	gen_server:call(Pid, get_subject).
+
+get_activities(Pid) ->
+	gen_server:call(Pid, get_activities).
+
+log_session(Pid, Type, Timestamp, Minutes) ->
+	gen_server:call(Pid, {log_session, {Type, Timestamp, Minutes}}).
+
 init(Subject) ->
 	pg:join(study_system_server, subject_servers, self()),
-	{ok, #{subject => Subject}}.
+	{ok, #{subject => Subject,
+		   priorities => #{reading => rand:uniform(),
+						   exercises => rand:uniform()}}}.
 
 handle_call(get_subject, _From, State = #{subject := Subject}) ->
 	{reply, {subject, Subject}, State};
+handle_call(get_activities, _From,
+			State = #{subject := Subject,
+					  priorities := #{reading := ReadingPriority,
+									  exercises := ExercisesPriority}}) ->
+	Reading = {Subject, reading, ReadingPriority},
+	Exercises = {Subject, exercises, ExercisesPriority},
+	{reply, [Reading, Exercises], State};
+handle_call({log_session, {Type, Timestamp, Minutes}}, _From,
+			State = #{subject := Subject, priorities := Priorities}) ->
+	case Priorities of
+		#{Type := Priority} ->
+			UpdatedPriorities = Priorities#{Type := Priority * 0.667},
+			{reply, ok, State#{priorities := UpdatedPriorities}};
+		_ ->
+			{reply, {error, invalid_type}, State}
+	end;
 handle_call(_Request, _From, State) ->
 	{reply, ok, State}.
 
 handle_cast(_Msg, State) ->
 	{noreply, State}.
 
-handle_info({new_session, Type, Timestamp, Minutes},
-			State = #{subject := Subject}) ->
-	io:format(
-	  "Received new ~p session: type ~p, timestamp ~p, minutes ~p~n",
-	  [Subject, Type, Timestamp, Minutes]),
-	{noreply, State};
 handle_info(_Info, State) ->
 	{noreply, State}.