Adjustment to allow sending Base64 attachments, not just plain text and fix html preview on message list (#28)

* Adjustment to allow sending Base64 attachments, not just plain text and Added a few parameters to README.md

* A bug that prevented the preview of email bodies in HTML from being displayed in the message list has been fixed

Author: garanda21

README.md

@@ -123,9 +123,11 @@ The request body has to be json with these parameters
 |subject|string|no|The email`s subject field|`{"subject":"Some Subject"}`|
 |from|string|yes|The email address from which the email is sent.<br>Must be something@yourdomain.com.<br> The the domain has to be added to SES and be verified.|`{"from":"noreply@yourdomain.com"}`|
 |to|string/string[]|yes|The emails recipient(s)|`{"to":"joe@somedomain.com"}` or `{"to": ["joe@somedomain.com", "jane@somedomain.com"]}`|
+|cc|string|no|"The email address to which a copy of the email will be sent.".|`{"cc":"cc_address@yourdomain.com"}`|
+|reply_to|string|no|The email address from which the reply will be sent.|`{"reply_to":"reply@yourdomain.com"}`|
 |headers|object|no|An object containing key/value pairs of headers|`{"headers": {"X-Entity-Ref-ID": "00"}}`|
 |provider_options|object|no|An object containing key/value pairs of provider options|`{"provider_options": {"tags": [{"name": "tag-name", "value": "some-value"}]}}`|
-|attachments|array|no|An array containing attachments|`{"attachments": [{"filename": "invoice.txt", "content": "pewp"}]}`|
+|attachments|array|no|An array containing attachments|`{"attachments": [{"filename": "invoice.txt", "content": "pewp", "content_type": "text/plain"}]}`|
 
 ### Example
 

lib/phoenix_00/mailer.ex

@@ -68,16 +68,38 @@ defmodule Phoenix00.Mailer do
         {:error, "Missing content type on attachment."}
 
       content_type ->
+      # Validate if the content is a Base64 string and decode if necessary
+      content =
+        case is_base64?(attachment["content"]) do
+          true -> 
+            Base.decode64!(attachment["content"]) # Decode Base64
+          false -> 
+            attachment["content"] # It keeps the content as is.
+        end
+
         swoosh
         |> Swoosh.Email.attachment(
-          Swoosh.Attachment.new({:data, attachment["content"]},
+          Swoosh.Attachment.new({:data, content},
             filename: attachment["filename"],
             content_type: content_type
           )
         )
     end
   end
 
+  # Function to validate string Base64
+  defp is_base64?(string) when is_bitstring(string) do
+    case Base.decode64(string, ignore: :whitespace) do
+      {:ok, decoded} -> 
+        # If encoding it again gives us the original string, it is valid Base64
+        Base.encode64(decoded) == String.replace(string, ~r/\s+/, "")
+      :error -> 
+        false
+    end
+  end
+
+  defp is_base64?(_), do: false
+
   defp map_to_contact(info) when is_list(info) do
     Enum.map(info, &map_to_contact/1)
   end

lib/phoenix_00_web/live/message_live/show.html.heex

@@ -41,7 +41,7 @@
       title="Inline Frame Example"
       width="100%"
       style="min-height: 600px;"
-      srcdoc={raw(@message.email.body)}
+      srcdoc={@message.email.body}
     >
     </iframe>
   </div>