How can I get the parent author from sprout forms to send to sprout mail?

Question

I am including a sprout form on my template like this:

...
{{ craft.sproutForms.displayForm('myForm') }}
...

I am submitting the form via ajax, and when the form is submitted I am trying to set the recipient in Sprout Email to the form's container author.

{author.email}

So it's not the author of the submitted form/entry, it's the author of the entry that the form is sitting on that I'm trying to access.

I'd really like to avoid passing in an email from a hidden input if at all possible. Thank you for any suggestions!

Update

For example, I am on the page a.html which has an author of damon@email.com. On a.html there is a contact form. When a user submits the contact form, I want a confirmation email sent tothem, and then an email sent to the author of the entry that the contact form is on. The same contact form can live on any page, and each page could have different authors.

a.html has an author of damon@email.com b.html has an author of foo@email.com

In the above case, a confirmation email needs to go whomever filled out the form, and then a notification email to each of the entries respectively.

Update 2

I am getting closer I think, but struggling to dynamically set the recipient.

Here is my form:

...
{% set form = craft.sproutForms.form('myForm') %}
<input type="hidden" name="action" value="sproutForms/entries/saveEntry">
<input type="hidden" name="handle" value="{{ form.handle }}">
<input type="hidden" name="entry" value="{{ entry.id }}">
<input type="hidden" name="author" value="{{ entry.author.id }}">

Then in my plugin I am doing this:

craft()->on('sproutForms.onBeforeSaveEntry', function (Event $event) {
    if (craft()->request->isSiteRequest()) {
        if (craft()->request->getPost('author') != '') {
            $owner = craft()->users->getUserById(craft()->request->getPost('author'));

            if ($owner) {
                if ($event->params['isNewEntry']) {
                    $entry = $event->params['entry'];

                    $entry->setContentFromPost(array(
                        'ownerEmail' => $owner->email, // damon@email.com
                    ));

                   // Set {ownerEmail} as recipient in notification?
                }
            }

In my ajax response I am seeing:

{"errors":[]}

In the sproutemail.log I am seeing:

[error] [plugin] No recipients found.

In the recipient field I have tried {ownerEmail} and {object.ownerEmail} both having no success.

I have also tried setting field values just in the off chance...

{% do craft.sproutForms.addFieldVariables({ entry: entry }) %}

The whole purpose of this is that I am trying to avoid putting a person's email in a hidden input. Just so that if a user of the site viewed the source the author's email wasn't right out in the open.

Answer 1

This can be done using an Invisible Field and the addFieldVariables tag. Define the value you want as your email in your template:

{% do craft.sproutForms.addFieldVariables({
    'secretEmailAddress': entry.author.email
}) %}

Set the Invisible Field to target that value:

{secretEmailAddress}

And then customize the Notification Email Recipients field to target the handle of the Invisible Field:

{invisibleFieldHandle}

Another example of doing this dynamically from an Entry with a Form Relations field has been posted in response to another question here: https://craftcms.stackexchange.com/a/29553/115