Attach selected email as an attachment to a draft email

Question

I'm trying to add an email item as an attachment to a draft email using create-an-item-attachment api, Where I'm providing the Item as the response of get-a-message api, but I'm getting errors like:

@odata.id, @odata.context, @odata.etag
"The annotation 'odata.context' was found. This annotation is either not recognized or not expected at the current position."

& if I manually remove these 2 annotations I get error for these variables.(I stopped after it gave error to Subject)

ReceivedDateTime, SentDateTime, HasAttachments, Subject

The property 'HasAttachments' does not exist on type 'Microsoft.OutlookServices.Item'. Make sure to only use property names that are defined by the type or mark the type as open type.

I did take a look at this SO answer. But I'm not sure if I can use this method to add attachment to the draft email item. I tried calling item.addItemAttachmentAsync() where item being the response of get-a-message api but got error as item.addItemAttachmentAsync is not a function

I feel like I'm doing something wrong here can anyone help.

Edit:

I feel there is some confusion with my question so Let me add more context. My add-in runs on the Inbox email item, so when the user clicks on the add-in, I wish to forward the email Office.context.mailbox.item to some email address as an attachment including the Office.context.mailbox.item attachments and the email headers. This was possible using SOAP api using something like this.

Now that I'm using Rest API, I'm unable to do the exact thing which I have doing using SOAP api, forward the mail item as an attachment with email headers and original email atatchments. I'm creating a new draft item using /createforward and then trying to edit the draft item and attach /attachments.

With the help of this SO post I was able to send the email as an attachment. I ended up removing @odata.context from the message itemAttachment and added "@odata.type" : #Microsoft.OutlookServices.Message to the message itemAttachment. But now the attached email headers are missing in the attachment.

Answer 1

To add the item as an attachment you should use the item.addFileAttachmentAsync() function from Office.js.

Here is an example of how to do this:

// Example EWS Item ID
var itemId = "AAMkADU5ODYxOTI2LWQ5ODktNGNkMy05ZmU5LWY4ZWNlMmEwNDI4MwBGAAAAAAC8pAGEht5DRrHaTsDL/q5XBwCys1ms6AKZT7uAgKv13R58ABtsz8d7AABoPf5UVWMrTKxA5Yn7Am3VAAATUR7UAAA=";

Office.context.mailbox.item.addItemAttachmentAsync
(
    itemId,
    "message_name.msg",
    {
        // The values in asyncContext can be accessed in the callback
        "asyncContext" : { foo: 1, bar: 6, baz: true }
    },
    function (asyncResult)
    {
        showMessage(JSON.stringify(asyncResult));
    }
);

Edit: To add current item as attachment to a new draft message you can use the displayNewMessageFormAPI:

Office.context.mailbox.displayNewMessageForm(
{
    htmlBody : "This is a sample with file and item attachments",
    attachments :
    [
        { type: "file", url: "http://i.imgur.com/9S36xvA.jpg", name: "dog.jpg" },
        { type: "item", itemId : Office.context.mailbox.item.itemId, name: "test_email.msg" }
    ],
    options : { asyncContext: null },
    callback : function (asyncResult)
    {
        if (asyncResult.status == "failed")
        {
            showMessage("Action failed with error: " + asyncResult.error.message);
        }
    }
});

You can also add to/cc recipients as per your scenario in the above request.