Added detailed plugin information to the plugins page (#1013)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/Tests/Tools/PluginSystem/PluginLinksTests.cs

@@ -0,0 +1,73 @@
+using AIStudio.Tools.PluginSystem;
+using AIStudio.Tools.Services;
+
+namespace AIStudio.Tests.Tools.PluginSystem;
+
+/// <summary>
+/// Checks which texts in the metadata of a plugin count as links.
+/// </summary>
+/// <remarks>
+/// AI Studio offers such a link as a button, and a click opens it right away. A plugin may therefore
+/// only link to a website or to a mail address. Any other scheme would let a plugin open something on
+/// the computer of the user, and plain text, which a support contact may be, gets no button at all. The
+/// links which the Assistant Builder fills in tell nothing about a plugin and count as not stated.
+/// </remarks>
+[TestFixture]
+public sealed class PluginLinksTests
+{
+    [TestCase("https://example.org")]
+    [TestCase("http://example.org/plugins")]
+    [TestCase("mailto:support@example.org")]
+    [TestCase("mailto:support@example.org?subject=Plugin")]
+    [TestCase("  https://example.org  ")]
+    public void AWebsiteOrAMailAddressIsALink(string text)
+    {
+        Assert.That(PluginLinks.TryParse(text, out _), Is.True);
+    }
+
+    [TestCase("")]
+    [TestCase("MindWork AI")]
+    [TestCase("example.org")]
+    [TestCase("file:///etc/passwd")]
+    [TestCase("javascript:alert(1)")]
+    [TestCase("ftp://example.org")]
+    [TestCase("mailto:")]
+    [TestCase("mailto:?subject=Plugin")]
+    public void AnythingElseIsNoLink(string text)
+    {
+        Assert.That(PluginLinks.TryParse(text, out _), Is.False);
+    }
+
+    [Test]
+    public void OnlyAMailtoLinkWritesAMail()
+    {
+        Assert.Multiple(() =>
+        {
+            Assert.That(PluginLinks.TryParse("mailto:support@example.org", out var mail) && PluginLinks.IsMail(mail), Is.True);
+            Assert.That(PluginLinks.TryParse("https://example.org", out var website) && PluginLinks.IsMail(website), Is.False);
+        });
+    }
+
+    [TestCase(AssistantPluginGenerationService.DEFAULT_SUPPORT_CONTACT, true)]
+    [TestCase(AssistantPluginGenerationService.DEFAULT_SOURCE_URL, true)]
+    [TestCase($"  {AssistantPluginGenerationService.DEFAULT_SOURCE_URL}  ", true)]
+    [TestCase("mailto:support@example.org", false)]
+    [TestCase("https://github.com/MindWorkAI/AI-Studio/wiki", false)]
+    public void OnlyTheLinksOfTheAssistantBuilderArePlaceholders(string text, bool isPlaceholder)
+    {
+        Assert.That(PluginLinks.IsPlaceholder(text), Is.EqualTo(isPlaceholder));
+    }
+
+    [TestCase("mailto:support@example.org", "support@example.org")]
+    [TestCase("mailto:support@example.org?subject=Plugin", "support@example.org")]
+    [TestCase("mailto:support%2Bplugins@example.org", "support+plugins@example.org")]
+    [TestCase("https://example.org/plugins?id=1", "https://example.org/plugins?id=1")]
+    public void AMailLinkShowsItsAddressAndAWebsiteShowsItself(string text, string displayText)
+    {
+        Assert.Multiple(() =>
+        {
+            Assert.That(PluginLinks.TryParse(text, out var link), Is.True);
+            Assert.That(PluginLinks.GetDisplayText(link!), Is.EqualTo(displayText));
+        });
+    }
+}