feat: add Waveshare instructions (activity)

mu88 · Jul 6, 2023 · 010c7a9 · 010c7a9
1 parent a297d8c
commit 010c7a9
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Showing 2 changed files with 38 additions and 5 deletions.
diff --git a/src/ScreenshotCreator.Api/Program.cs b/src/ScreenshotCreator.Api/Program.cs
@@ -1,3 +1,4 @@
+using System.Diagnostics.CodeAnalysis;
 using Microsoft.Extensions.Options;
 using ScreenshotCreator.Api;
 using ScreenshotCreator.Logic;
@@ -28,25 +29,28 @@
            async (HttpContext httpContext, ImageProcessor imageProcessor, Creator creator, IOptions<ScreenshotOptions> options) =>
            {
                await creator.CreateScreenshotAsync(options.Value.Width, options.Value.Height);
-               return await ReturnImageOrNotFoundAsync(httpContext, imageProcessor);
+               return await ReturnImageOrNotFoundAsync(httpContext, imageProcessor, options);
            });
 app.MapGet("createImageWithSizeNow",
            async (uint width,
                   uint height,
                   HttpContext httpContext,
                   ImageProcessor imageProcessor,
+                  IOptions<ScreenshotOptions> options,
                   Creator creator) =>
            {
                await creator.CreateScreenshotAsync(width, height);
-               return await ReturnImageOrNotFoundAsync(httpContext, imageProcessor);
+               return await ReturnImageOrNotFoundAsync(httpContext, imageProcessor, options);
            });
 
 app.Run();
 
 async Task<IResult> ReturnImageOrNotFoundAsync(HttpContext httpContext,
                                                ImageProcessor imageProcessor,
+                                               IOptions<ScreenshotOptions> options,
                                                bool blackAndWhite = false,
-                                               bool asWaveshareBytes = false)
+                                               bool asWaveshareBytes = false,
+                                               bool addWaveshareInstructions = false)
 {
     var screenshotFile = Path.Combine(Environment.CurrentDirectory, ScreenshotOptions.ScreenshotFileName);
     if (!File.Exists(screenshotFile)) return Results.NotFound();
@@ -57,11 +61,36 @@ async Task<IResult> ReturnImageOrNotFoundAsync(HttpContext httpContext,
                      ? Results.Bytes(processingResult.Data, processingResult.MediaType)
                      : Results.File(processingResult.Data, processingResult.MediaType);
 
-    httpContext.Response.Headers.Add("last-modified-local-time", GetLastModifiedAsLocalTime(screenshotFile));
+    if (addWaveshareInstructions) AddWaveshareInstructions(httpContext.Response.Headers, options.Value, screenshotFile);
 
     return result;
 }
 
+void AddWaveshareInstructions(IHeaderDictionary headers, ScreenshotOptions screenshotOptions, string screenshotFile)
+{
+    headers.Add("waveshare-last-modified-local-time", GetLastModifiedAsLocalTime(screenshotFile));
+    headers.Add("waveshare-sleep-between-updates", CalculateSleepBetweenUpdates(screenshotOptions));
+    headers.Add("waveshare-update-screen", DisplayShouldBeActive(screenshotOptions.Activity) ? true.ToString() : false.ToString());
+}
+
+string CalculateSleepBetweenUpdates(ScreenshotOptions screenshotOptions) =>
+    DisplayShouldBeActive(screenshotOptions.Activity)
+        ? screenshotOptions.RefreshIntervalInSeconds.ToString()
+        : screenshotOptions.Activity.RefreshIntervalWhenInactiveInSeconds.ToString();
+
+bool DisplayShouldBeActive([NotNullWhen(false)] Activity? activity)
+{
+    if (activity is null) return true;
+
+    var currentLocalTime = GetCurrentLocalTime();
+    return activity.ActiveFrom <= currentLocalTime && currentLocalTime <= activity.ActiveTo;
+}
+
+TimeOnly GetCurrentLocalTime() =>
+    TimeOnly.FromDateTime(TimeZoneInfo
+                              .ConvertTimeFromUtc(DateTime.UtcNow,
+                                                  TimeZoneInfo.FindSystemTimeZoneById(Environment.GetEnvironmentVariable("TZ") ?? TimeZoneInfo.Local.Id)));
+
 string GetLastModifiedAsLocalTime(string file) =>
     TimeZoneInfo
         .ConvertTimeFromUtc(File.GetLastWriteTimeUtc(file), TimeZoneInfo.FindSystemTimeZoneById(Environment.GetEnvironmentVariable("TZ") ?? TimeZoneInfo.Local.Id))

diff --git a/src/ScreenshotCreator.Logic/ScreenshotOptions.cs b/src/ScreenshotCreator.Logic/ScreenshotOptions.cs
@@ -23,10 +23,14 @@ public class ScreenshotOptions
     public uint RefreshIntervalInSeconds { get; set; }
 
     public bool BackgroundProcessingEnabled { get; set; }
+
+    public Activity? Activity { get; set; }
 }
 
 public enum UrlType
 {
     Any,
     OpenHab
-}
+}
+
+public record Activity(TimeOnly ActiveFrom, TimeOnly ActiveTo, uint RefreshIntervalWhenInactiveInSeconds);