Add upload, preview sheet

CHDataManagement/Extensions/String+Extensions.swift

@@ -17,10 +17,29 @@ extension String {
     }
 
     var withLeadingSlashRemoved: String {
-        if !hasPrefix("/") {
-            return self
+        hasPrefix("/") ? String(dropFirst("/".count)) : self
+    }
+
+    var withLeadingSlash: String {
+        hasPrefix("/") ? self : "/" + self
+    }
+
+    var withTrailingSlashRemoved: String {
+        hasSuffix("/") ? String(dropLast("/".count)) : self
+    }
+
+    var withTrailingSlash: String {
+        hasSuffix("/") ? self : self + "/"
+    }
+
+    var withHttpPrefixRemoved: String {
+        if hasPrefix("https://") {
+            return String(dropFirst("https://".count))
         }
-        return String(dropFirst("/".count))
+        if hasPrefix("http://") {
+            return String(dropFirst("http://".count))
+        }
+        return self
     }
 
     var removingSurroundingQuotes: String {