Communication: Add support for mentioning FAQs (#95)

Sources/ArtemisMarkdown/RegexReplacementVisitor.swift

@@ -82,6 +82,16 @@ enum RegexReplacementVisitors {
         return "![Message](local://fa-message) [#\(match.id)](mention://message/\(match.id))"
     }
 
+    // (?<FAQ>\[faq].*?\[\/faq]
+    static let faqs = RegexReplacementVisitor(
+        regex: #/\[faq\](?<name>.*?)\((?<path>/courses/\d+/faq\?faqId=\d+)\)\[/faq\]/#
+    ) { match in
+        guard let baseURL = UserSessionFactory.shared.institution?.baseURL,
+              let url = URL(string: String(match.path), relativeTo: baseURL) else {
+            return String(match.0)
+        }
+        return "![FAQ](local://fa-question) [\(match.name)](mention://faq/\(url.query() ?? ""))"
+    }
 
     // (?<SLIDE>\[slide].*?\[\/slide])
     static let slides = RegexReplacementVisitor(
@@ -100,7 +110,8 @@ enum RegexReplacementVisitors {
             lectures.visit(input:),
             members.visit(input:),
             messages.visit(input:),
-            slides.visit(input:)
+            slides.visit(input:),
+            faqs.visit(input:)
         ] {
             visit(&input)
         }

Sources/ArtemisMarkdown/Resources/Assets.xcassets/fa-question.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "filename" : "question.svg",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}