option to add thumbnail

Author: reshmee011

documentation/Set-PnPWebHeader.md

@@ -15,8 +15,7 @@ Allows configuration of the "Change the look" Header
 ## SYNTAX
 
 ```powershell
-Set-PnPWebHeader [-SiteLogoUrl <string>] [-HeaderLayout <HeaderLayoutType>] [-HeaderEmphasis <SPVariantThemeType>] [-HideTitleInHeader]
-[-HeaderBackgroundImageUrl <string>] [-HeaderBackgroundImageFocalX <double>] [-HeaderBackgroundImageFocalY <double>] [-LogoAlignment <LogoAlignment>]
+Set-PnPWebHeader [-SiteLogoUrl <string>] [-SiteThumbnailUrl <string>] [-HeaderLayout <HeaderLayoutType>] [-HeaderEmphasis <SPVariantThemeType>] [-HideTitleInHeader] [-HeaderBackgroundImageUrl <string>] [-HeaderBackgroundImageFocalX <double>] [-HeaderBackgroundImageFocalY <double>] [-LogoAlignment <LogoAlignment>]
  [-Connection <PnPConnection>] 
 ```
 
@@ -163,6 +162,20 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
+### -SiteThumbnailUrl
+Sets the thumbnail of the site shown at the top left to the provided server relative url, i.e. /sites/hrdepartment/siteassets/thumbnail.png. Provide "" or $null to remove the thumbnail.
+
+```yaml
+Type: String
+Parameter Sets: (All)
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
 ### -HideTitleInHeader
 Toggle the title visibility in the header.
 

src/Commands/Web/SetWebHeader.cs

@@ -14,6 +14,9 @@ public class SetWebHeader : PnPWebCmdlet
         [Parameter(Mandatory = false)]
         public string SiteLogoUrl;
 
+        [Parameter(Mandatory = false)]
+        public string SiteThumbnailUrl;
+
         [Parameter(Mandatory = false)]
         public HeaderLayoutType HeaderLayout = HeaderLayoutType.Standard;
 
@@ -38,18 +41,17 @@ public class SetWebHeader : PnPWebCmdlet
         protected override void ExecuteCmdlet()
         {
             var requiresWebUpdate = false;
-
+    
             if(ParameterSpecified(nameof(SiteLogoUrl)))
-            {               
-                WriteVerbose($"Setting site logo image to '{SiteLogoUrl}'");
-
-                var stringContent = new StringContent("{\"relativeLogoUrl\":\"" + SiteLogoUrl + "\",\"type\":0,\"aspect\":1}");
-                stringContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");
-                CurrentWeb.EnsureProperties(p => p.Url);
-                var result = GraphHelper.PostAsync(Connection, $"{CurrentWeb.Url.TrimEnd('/')}/_api/siteiconmanager/setsitelogo", AccessToken, stringContent).GetAwaiter().GetResult();
-                WriteVerbose($"Response from setsitelogo request: {result.StatusCode}");
-            }  
+            {
+                SetSiteImage(SiteLogoUrl, "site logo", 1);
+            }
 
+            if(ParameterSpecified(nameof(SiteThumbnailUrl)))
+            {
+                SetSiteImage(SiteThumbnailUrl, "thumbnailurl", 0);
+            }
+            
             if(ParameterSpecified(nameof(LogoAlignment)))
             {
                 WriteVerbose($"Setting site logo alignment to '{LogoAlignment}'");
@@ -120,5 +122,15 @@ protected override void ExecuteCmdlet()
                 ClientContext.ExecuteQueryRetry();
             }
         }
+        private void SetSiteImage(string imageUrl, string imageType, int aspect)
+        {
+            WriteVerbose($"Setting site {imageType} image to '{imageUrl}'");
+
+            var stringContent = new StringContent($"{{\"relativeLogoUrl\":\"{imageUrl}\",\"type\":0,\"aspect\":{aspect}}}");
+            stringContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");
+            CurrentWeb.EnsureProperties(p => p.Url);
+            var result = GraphHelper.PostAsync(Connection, $"{CurrentWeb.Url.TrimEnd('/')}/_api/siteiconmanager/setsitelogo", AccessToken, stringContent).GetAwaiter().GetResult();
+            WriteVerbose($"Response from {imageType} request: {result.StatusCode}");
+        }
     }
 }