Add meeting countdown and agenda plugins

src/DesktopMagic/BuiltInPlugins/AgendaPlugin.cs

@@ -0,0 +1,279 @@
+using DesktopMagic.Api;
+using DesktopMagic.Api.Settings;
+using DesktopMagic.Helpers;
+
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Text;
+using System.Linq;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace DesktopMagic.BuiltInPlugins;
+
+internal class AgendaPlugin : AsyncPlugin
+{
+    [Setting("agenda-calendar-url", "iCal URL")]
+    private readonly TextBox calendarUrl = new TextBox(string.Empty);
+
+    [Setting("agenda-refresh-button", "Refresh Calendar")]
+    private readonly Button refreshButton = new Button("Refresh");
+
+    [Setting("agenda-refresh-interval", "Refresh Every (minutes)")]
+    private readonly IntegerUpDown refreshMinutes = new IntegerUpDown(1, 120, 10);
+
+    [Setting("agenda-lookahead-hours", "Look Ahead (hours)")]
+    private readonly IntegerUpDown lookAheadHours = new IntegerUpDown(1, 336, 24);
+
+    [Setting("agenda-max-events", "Maximum Events")]
+    private readonly IntegerUpDown maxEvents = new IntegerUpDown(1, 15, 5);
+
+    [Setting("agenda-include-all-day", "Include All-Day Events")]
+    private readonly CheckBox includeAllDayEvents = new CheckBox(true);
+
+    [Setting("agenda-show-date", "Show Date")]
+    private readonly CheckBox showDate = new CheckBox(true);
+
+    public override int UpdateInterval { get; set; } = 30000;
+
+    private List<CalendarEventEntry> upcomingEvents = [];
+    private DateTime nextRefreshTime = DateTime.MinValue;
+    private bool forceRefresh = true;
+    private bool themeChanged = true;
+    private string? errorText;
+
+    public override Task StartAsync(CancellationToken cancellationToken)
+    {
+        refreshButton.OnClick += () =>
+        {
+            forceRefresh = true;
+            Application.UpdateWindow();
+        };
+
+        calendarUrl.OnValueChanged += MarkForRefresh;
+        refreshMinutes.OnValueChanged += MarkForRefresh;
+        lookAheadHours.OnValueChanged += MarkForRefresh;
+        maxEvents.OnValueChanged += MarkForRefresh;
+        includeAllDayEvents.OnValueChanged += MarkForRefresh;
+        showDate.OnValueChanged += Application.UpdateWindow;
+
+        return Task.CompletedTask;
+    }
+
+    public override async Task<Bitmap?> MainAsync(CancellationToken cancellationToken)
+    {
+        if (themeChanged || forceRefresh || DateTime.Now >= nextRefreshTime)
+        {
+            await RefreshEventsAsync(cancellationToken);
+            themeChanged = false;
+        }
+
+        return RenderAgendaBitmap();
+    }
+
+    public override void OnThemeChanged()
+    {
+        themeChanged = true;
+    }
+
+    public override void OnSettingsChanged()
+    {
+        Application.UpdateWindow();
+    }
+
+    private void MarkForRefresh()
+    {
+        forceRefresh = true;
+        Application.UpdateWindow();
+    }
+
+    private async Task RefreshEventsAsync(CancellationToken cancellationToken)
+    {
+        forceRefresh = false;
+        nextRefreshTime = DateTime.Now.AddMinutes(Math.Max(1, refreshMinutes.Value));
+
+        if (string.IsNullOrWhiteSpace(calendarUrl.Value))
+        {
+            upcomingEvents = [];
+            errorText = "Set iCal URL in settings";
+            return;
+        }
+
+        try
+        {
+            DateTime now = DateTime.Now;
+            DateTime windowEnd = now.AddHours(Math.Max(1, lookAheadHours.Value));
+
+            upcomingEvents = await IcsCalendarHelper.GetUpcomingEventsAsync(
+                calendarUrl.Value.Trim(),
+                now,
+                windowEnd,
+                maxEvents.Value,
+                includeAllDayEvents.Value,
+                cancellationToken);
+
+            errorText = null;
+        }
+        catch (HttpRequestException ex)
+        {
+            upcomingEvents = [];
+            errorText = $"Calendar unavailable: {ex.Message}";
+        }
+        catch (TaskCanceledException ex)
+        {
+            upcomingEvents = [];
+            errorText = $"Calendar unavailable: {ex.Message}";
+        }
+        catch (InvalidOperationException ex)
+        {
+            upcomingEvents = [];
+            errorText = $"Calendar unavailable: {ex.Message}";
+        }
+    }
+
+    private Bitmap RenderAgendaBitmap()
+    {
+        List<(string Day, string Date, string Time, string Title, bool IsMessage)> rows = [];
+
+        if (!string.IsNullOrWhiteSpace(errorText))
+        {
+            rows.Add((string.Empty, string.Empty, string.Empty, errorText, true));
+        }
+        else if (upcomingEvents.Count == 0)
+        {
+            rows.Add((string.Empty, string.Empty, string.Empty, "No events in selected window", true));
+        }
+        else
+        {
+            foreach (CalendarEventEntry eventEntry in upcomingEvents)
+            {
+                string dayPart = showDate.Value ? eventEntry.StartLocal.ToString("ddd") : string.Empty;
+                string datePart = showDate.Value ? eventEntry.StartLocal.ToString("dd MMM yyyy") : string.Empty;
+                string timePart = eventEntry.IsAllDay ? "All day" : eventEntry.StartLocal.ToShortTimeString();
+
+                rows.Add((dayPart, datePart, timePart, eventEntry.Title, false));
+            }
+        }
+
+        using Font font = new Font(Application.Theme.Font, 70);
+        using Bitmap measureBitmap = new Bitmap(1, 1);
+        using Graphics measureGraphics = Graphics.FromImage(measureBitmap);
+        measureGraphics.TextRenderingHint = TextRenderingHint.AntiAlias;
+
+        bool hasDayColumn = rows.Any(row => !row.IsMessage && !string.IsNullOrWhiteSpace(row.Day));
+        bool hasDateColumn = rows.Any(row => !row.IsMessage && !string.IsNullOrWhiteSpace(row.Date));
+        bool hasTimeColumn = rows.Any(row => !row.IsMessage && !string.IsNullOrWhiteSpace(row.Time));
+        float maxDayWidth = 0;
+        float maxDateWidth = 0;
+        float maxTimeWidth = 0;
+        float maxTitleWidth = 0;
+        float lineHeight = 0;
+
+        foreach ((string day, string date, string time, string title, bool isMessage) in rows)
+        {
+            if (isMessage)
+            {
+                SizeF messageSize = measureGraphics.MeasureString(title, font);
+                maxTitleWidth = Math.Max(maxTitleWidth, messageSize.Width);
+                lineHeight = Math.Max(lineHeight, messageSize.Height);
+                continue;
+            }
+
+            if (hasDayColumn)
+            {
+                SizeF daySize = measureGraphics.MeasureString(day, font);
+                maxDayWidth = Math.Max(maxDayWidth, daySize.Width);
+                lineHeight = Math.Max(lineHeight, daySize.Height);
+            }
+
+            if (hasDateColumn)
+            {
+                SizeF dateSize = measureGraphics.MeasureString(date, font);
+                maxDateWidth = Math.Max(maxDateWidth, dateSize.Width);
+                lineHeight = Math.Max(lineHeight, dateSize.Height);
+            }
+
+            if (hasTimeColumn)
+            {
+                SizeF timeSize = measureGraphics.MeasureString(time, font);
+                maxTimeWidth = Math.Max(maxTimeWidth, timeSize.Width);
+                lineHeight = Math.Max(lineHeight, timeSize.Height);
+            }
+
+            SizeF titleSize = measureGraphics.MeasureString(title, font);
+            maxTitleWidth = Math.Max(maxTitleWidth, titleSize.Width);
+            lineHeight = Math.Max(lineHeight, titleSize.Height);
+        }
+
+        float columnSpacing = measureGraphics.MeasureString("  ", font).Width;
+
+        float prefixWidth = 0;
+        bool hasAnyPrefix = false;
+        if (hasDayColumn)
+        {
+            prefixWidth += maxDayWidth;
+            hasAnyPrefix = true;
+        }
+        if (hasDateColumn)
+        {
+            prefixWidth += (hasAnyPrefix ? columnSpacing : 0) + maxDateWidth;
+            hasAnyPrefix = true;
+        }
+        if (hasTimeColumn)
+        {
+            prefixWidth += (hasAnyPrefix ? columnSpacing : 0) + maxTimeWidth;
+            hasAnyPrefix = true;
+        }
+
+        float totalWidth = (hasAnyPrefix ? prefixWidth + columnSpacing : 0) + maxTitleWidth;
+
+        int width = Math.Max(1, (int)Math.Ceiling(totalWidth));
+        int height = Math.Max(1, (int)Math.Ceiling(lineHeight * rows.Count));
+
+        Bitmap bitmap = new Bitmap(width, height);
+        bitmap.SetResolution(100, 100);
+
+        using Graphics graphics = Graphics.FromImage(bitmap);
+        using SolidBrush brush = new SolidBrush(Application.Theme.PrimaryColor);
+        graphics.TextRenderingHint = TextRenderingHint.AntiAlias;
+        graphics.Clear(Color.Transparent);
+
+        float dayColumnX = 0;
+        float dateColumnX = hasDayColumn ? dayColumnX + maxDayWidth + columnSpacing : dayColumnX;
+        float timeColumnX = hasDateColumn ? dateColumnX + maxDateWidth + columnSpacing : dateColumnX;
+        float titleColumnX = hasAnyPrefix ? timeColumnX + (hasTimeColumn ? maxTimeWidth : 0) + columnSpacing : 0;
+
+        for (int index = 0; index < rows.Count; index++)
+        {
+            (string day, string date, string time, string title, bool isMessage) = rows[index];
+            float y = index * lineHeight;
+
+            if (isMessage)
+            {
+                graphics.DrawString(title, font, brush, 0, y);
+                continue;
+            }
+
+            if (hasDayColumn && !string.IsNullOrWhiteSpace(day))
+            {
+                graphics.DrawString(day, font, brush, dayColumnX, y);
+            }
+
+            if (hasDateColumn && !string.IsNullOrWhiteSpace(date))
+            {
+                graphics.DrawString(date, font, brush, dateColumnX, y);
+            }
+
+            if (hasTimeColumn && !string.IsNullOrWhiteSpace(time))
+            {
+                graphics.DrawString(time, font, brush, timeColumnX, y);
+            }
+
+            graphics.DrawString(title, font, brush, titleColumnX, y);
+        }
+
+        return bitmap;
+    }
+}

src/DesktopMagic/BuiltInPlugins/NextMeetingCountdownPlugin.cs

@@ -0,0 +1,233 @@
+using DesktopMagic.Api;
+using DesktopMagic.Api.Settings;
+using DesktopMagic.Helpers;
+
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Text;
+using System.Linq;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace DesktopMagic.BuiltInPlugins;
+
+internal class NextMeetingCountdownPlugin : AsyncPlugin
+{
+    [Setting("meeting-calendar-url", "iCal URL")]
+    private readonly TextBox calendarUrl = new TextBox(string.Empty);
+
+    [Setting("meeting-refresh-button", "Refresh Calendar")]
+    private readonly Button refreshButton = new Button("Refresh");
+
+    [Setting("meeting-refresh-interval", "Refresh Every (minutes)")]
+    private readonly IntegerUpDown refreshMinutes = new IntegerUpDown(1, 120, 10);
+
+    [Setting("meeting-lookahead-hours", "Look Ahead (hours)")]
+    private readonly IntegerUpDown lookAheadHours = new IntegerUpDown(1, 336, 48);
+
+    [Setting("meeting-include-all-day", "Include All-Day Events")]
+    private readonly CheckBox includeAllDayEvents = new CheckBox(false);
+
+    [Setting("meeting-time-display", "Start Time Format")]
+    private readonly ComboBox startTimeDisplay = new ComboBox("None", "Date and time", "Time only");
+
+    [Setting("meeting-show-location", "Show Location")]
+    private readonly CheckBox showLocation = new CheckBox(false);
+
+    [Setting("meeting-center-lines", "Center Lines")]
+    private readonly CheckBox centerLines = new CheckBox(false);
+
+    public override int UpdateInterval { get; set; } = 1000;
+
+    private List<CalendarEventEntry> upcomingEvents = [];
+    private DateTime nextRefreshTime = DateTime.MinValue;
+    private bool forceRefresh = true;
+    private bool themeChanged = true;
+    private string? errorText;
+
+    public override Task StartAsync(CancellationToken cancellationToken)
+    {
+        refreshButton.OnClick += () =>
+        {
+            forceRefresh = true;
+            Application.UpdateWindow();
+        };
+
+        calendarUrl.OnValueChanged += MarkForRefresh;
+        refreshMinutes.OnValueChanged += MarkForRefresh;
+        lookAheadHours.OnValueChanged += MarkForRefresh;
+        includeAllDayEvents.OnValueChanged += MarkForRefresh;
+        startTimeDisplay.OnValueChanged += Application.UpdateWindow;
+        showLocation.OnValueChanged += Application.UpdateWindow;
+        centerLines.OnValueChanged += Application.UpdateWindow;
+
+        return Task.CompletedTask;
+    }
+
+    public override async Task<Bitmap?> MainAsync(CancellationToken cancellationToken)
+    {
+        if (themeChanged || forceRefresh || DateTime.Now >= nextRefreshTime)
+        {
+            await RefreshEventsAsync(cancellationToken);
+            themeChanged = false;
+        }
+
+        return RenderCountdownBitmap();
+    }
+
+    public override void OnThemeChanged()
+    {
+        themeChanged = true;
+    }
+
+    public override void OnSettingsChanged()
+    {
+        Application.UpdateWindow();
+    }
+
+    private void MarkForRefresh()
+    {
+        forceRefresh = true;
+        Application.UpdateWindow();
+    }
+
+    private async Task RefreshEventsAsync(CancellationToken cancellationToken)
+    {
+        forceRefresh = false;
+        nextRefreshTime = DateTime.Now.AddMinutes(Math.Max(1, refreshMinutes.Value));
+
+        if (string.IsNullOrWhiteSpace(calendarUrl.Value))
+        {
+            upcomingEvents = [];
+            errorText = "Set iCal URL in settings";
+            return;
+        }
+
+        try
+        {
+            DateTime now = DateTime.Now;
+            DateTime windowEnd = now.AddHours(Math.Max(1, lookAheadHours.Value));
+
+            upcomingEvents = await IcsCalendarHelper.GetUpcomingEventsAsync(
+                calendarUrl.Value.Trim(),
+                now,
+                windowEnd,
+                20,
+                includeAllDayEvents.Value,
+                cancellationToken);
+
+            errorText = null;
+        }
+        catch (HttpRequestException ex)
+        {
+            upcomingEvents = [];
+            errorText = $"Calendar unavailable: {ex.Message}";
+        }
+        catch (TaskCanceledException ex)
+        {
+            upcomingEvents = [];
+            errorText = $"Calendar unavailable: {ex.Message}";
+        }
+        catch (InvalidOperationException ex)
+        {
+            upcomingEvents = [];
+            errorText = $"Calendar unavailable: {ex.Message}";
+        }
+    }
+
+    private Bitmap RenderCountdownBitmap()
+    {
+        List<string> lines = [];
+
+        if (!string.IsNullOrWhiteSpace(errorText))
+        {
+            lines.Add(errorText);
+        }
+        else
+        {
+            DateTime now = DateTime.Now;
+            CalendarEventEntry? nextEvent = upcomingEvents.FirstOrDefault(eventEntry => eventEntry.EndLocal > now);
+
+            if (nextEvent is null)
+            {
+                lines.Add("No upcoming meetings");
+            }
+            else
+            {
+                lines.Add(nextEvent.Title);
+
+                if (startTimeDisplay.Value != "None")
+                {
+                    string timeText = nextEvent.IsAllDay
+                        ? "All day"
+                        : startTimeDisplay.Value == "Time only"
+                            ? nextEvent.StartLocal.ToString("t")
+                            : $"{nextEvent.StartLocal:D} {nextEvent.StartLocal:t}";
+                    lines.Add(timeText);
+                }
+
+                if (showLocation.Value && !string.IsNullOrWhiteSpace(nextEvent.Location))
+                {
+                    lines.Add(nextEvent.Location!);
+                }
+
+                if (now < nextEvent.StartLocal)
+                {
+                    lines.Add($"Starts in {FormatCountdown(nextEvent.StartLocal - now)}");
+                }
+                else
+                {
+                    lines.Add("In progress");
+                }
+            }
+        }
+
+        using Font font = new Font(Application.Theme.Font, 90);
+        using Bitmap measureBitmap = new Bitmap(1, 1);
+        using Graphics measureGraphics = Graphics.FromImage(measureBitmap);
+        measureGraphics.TextRenderingHint = TextRenderingHint.AntiAlias;
+
+        float maxWidth = 0;
+        float lineHeight = 0;
+        foreach (string line in lines)
+        {
+            SizeF size = measureGraphics.MeasureString(line, font);
+            maxWidth = Math.Max(maxWidth, size.Width);
+            lineHeight = Math.Max(lineHeight, size.Height);
+        }
+
+        int width = Math.Max(1, (int)Math.Ceiling(maxWidth));
+        int height = Math.Max(1, (int)Math.Ceiling(lineHeight * lines.Count));
+
+        Bitmap bitmap = new Bitmap(width, height);
+        bitmap.SetResolution(100, 100);
+
+        using Graphics graphics = Graphics.FromImage(bitmap);
+        using SolidBrush brush = new SolidBrush(Application.Theme.PrimaryColor);
+        graphics.TextRenderingHint = TextRenderingHint.AntiAlias;
+        graphics.Clear(Color.Transparent);
+
+        for (int index = 0; index < lines.Count; index++)
+        {
+            string line = lines[index];
+            float x = 0;
+            if (centerLines.Value)
+            {
+                SizeF lineSize = graphics.MeasureString(line, font);
+                x = Math.Max(0, (width - lineSize.Width) / 2f);
+            }
+
+            graphics.DrawString(line, font, brush, x, index * lineHeight);
+        }
+
+        return bitmap;
+    }
+
+    private static string FormatCountdown(TimeSpan timeSpan)
+    {
+        int totalHours = (int)timeSpan.TotalHours;
+        return $"{totalHours:00}:{timeSpan.Minutes:00}:{timeSpan.Seconds:00}";
+    }
+}

src/DesktopMagic/DesktopMagic.csproj

@@ -47,6 +47,7 @@
         <PackageReference Include="BusyIndicators" Version="2.1.3" />
         <PackageReference Include="CuteUtils" Version="1.0.0" />
         <PackageReference Include="Interop.IWshRuntimeLibrary" Version="1.0.1" />
+        <PackageReference Include="Ical.Net" Version="4.3.1" />
         <PackageReference Include="Microsoft.Web.WebView2" Version="1.0.3650.58" />
         <PackageReference Include="Modio" Version="1.0.0" />
         <PackageReference Include="NAudio" Version="2.2.1" />

src/DesktopMagic/Helpers/IcsCalendarHelper.cs

@@ -0,0 +1,89 @@
+using Ical.Net;
+using Ical.Net.CalendarComponents;
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace DesktopMagic.Helpers;
+
+public sealed class CalendarEventEntry
+{
+    public string Title { get; init; } = "Untitled";
+    public string? Location { get; init; }
+    public DateTime StartLocal { get; init; }
+    public DateTime EndLocal { get; init; }
+    public bool IsAllDay { get; init; }
+}
+
+public static class IcsCalendarHelper
+{
+    private static readonly HttpClient httpClient = new()
+    {
+        Timeout = TimeSpan.FromSeconds(12)
+    };
+
+    static IcsCalendarHelper()
+    {
+        httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("DesktopMagic");
+        httpClient.DefaultRequestHeaders.Accept.ParseAdd("text/calendar");
+    }
+
+    public static async Task<List<CalendarEventEntry>> GetUpcomingEventsAsync(
+        string calendarUrl,
+        DateTime windowStartLocal,
+        DateTime windowEndLocal,
+        int maxEvents,
+        bool includeAllDayEvents,
+        CancellationToken cancellationToken)
+    {
+        using HttpResponseMessage response = await httpClient.GetAsync(calendarUrl, cancellationToken);
+        response.EnsureSuccessStatusCode();
+        string icsContent = await response.Content.ReadAsStringAsync(cancellationToken);
+
+        Calendar calendar = Calendar.Load(icsContent);
+        DateTime windowStartUtc = windowStartLocal.ToUniversalTime();
+        DateTime windowEndUtc = windowEndLocal.ToUniversalTime();
+
+        List<CalendarEventEntry> results = [];
+
+        foreach (var occurrence in calendar.GetOccurrences(windowStartUtc, windowEndUtc))
+        {
+            if (occurrence.Source is not CalendarEvent calendarEvent)
+            {
+                continue;
+            }
+
+            DateTime startLocal = occurrence.Period.StartTime.AsSystemLocal;
+            DateTime endLocal = occurrence.Period.EndTime?.AsSystemLocal ?? startLocal.AddHours(1);
+            bool isAllDay = !occurrence.Period.StartTime.HasTime;
+
+            if (!includeAllDayEvents && isAllDay)
+            {
+                continue;
+            }
+
+            if (endLocal <= windowStartLocal)
+            {
+                continue;
+            }
+
+            results.Add(new CalendarEventEntry
+            {
+                Title = string.IsNullOrWhiteSpace(calendarEvent.Summary) ? "Untitled" : calendarEvent.Summary,
+                Location = string.IsNullOrWhiteSpace(calendarEvent.Location) ? null : calendarEvent.Location,
+                StartLocal = startLocal,
+                EndLocal = endLocal,
+                IsAllDay = isAllDay
+            });
+        }
+
+        return results
+            .OrderBy(eventEntry => eventEntry.StartLocal)
+            .Take(Math.Max(1, maxEvents))
+            .ToList();
+    }
+}

src/DesktopMagic/Manager.cs

@@ -44,6 +44,8 @@ public sealed class Manager
         {new((string)App.LanguageDictionary["date"],3) { Author = "Stone_Red" }, typeof(DatePlugin)},
         {new((string)App.LanguageDictionary["cpuUsage"], 4) { Author = "Stone_Red" }, typeof(CpuMonitorPlugin)},
         {new((string)App.LanguageDictionary["weather"], 5) { Author = "Stone_Red" }, typeof(WeatherPlugin)},
+        {new((string)App.LanguageDictionary["nextMeetingCountdown"], 6) { Author = "Stone_Red" }, typeof(NextMeetingCountdownPlugin)},
+        {new((string)App.LanguageDictionary["agenda"], 7) { Author = "Stone_Red" }, typeof(AgendaPlugin)},
     };
 
     // Window management

src/DesktopMagic/Resources/Strings/StringResources.de.xaml

@@ -38,6 +38,8 @@
     <system:String x:Key="cpuUsage">CPU Auslastung</system:String>
     <system:String x:Key="musicVisualizer">Musik Visualisierer</system:String>
     <system:String x:Key="weather">Wetter</system:String>
+    <system:String x:Key="nextMeetingCountdown">Nächstes Meeting Countdown</system:String>
+    <system:String x:Key="agenda">Agenda</system:String>
     <system:String x:Key="amplifier">Signalverstärkung:</system:String>
     <system:String x:Key="newLayout">Neues Layout</system:String>
     <system:String x:Key="deleteLayout">Layout Löschen</system:String>

src/DesktopMagic/Resources/Strings/StringResources.en.xaml

@@ -38,6 +38,8 @@
     <system:String x:Key="cpuUsage">CPU Usage</system:String>
     <system:String x:Key="musicVisualizer">Music Visualizer</system:String>
     <system:String x:Key="weather">Weather</system:String>
+    <system:String x:Key="nextMeetingCountdown">Next Meeting Countdown</system:String>
+    <system:String x:Key="agenda">Agenda</system:String>
     <system:String x:Key="amplifier">Signal Amplification:</system:String>
     <system:String x:Key="newLayout">New Layout</system:String>
     <system:String x:Key="deleteLayout">Delete Layout</system:String>