Model/CreateEmailCampaign - disable Header/Footer does not work properly

[karsten-eger]

When creating a campaign via API the setup of header and footer does not work properly. Both values are optional, so they fall back to their default_header setting configured in the gui.

Actual behaviour:

• setting header/footer to empty string '' ends up changing nothing. The default header/footer is still used
• setting header/footer to whitespace string ' ' ends up changing nothing. The default header/footer is still used
• setting header/footer to anything else string i.e. something triggers a check if the [MIRRORLINK] is found in the body of the mail and deactivates those two values entirely - as seen in the settings screen in the dashboard gui. The string entered here is never rendered inside the mail body though! We circumvented this right now with a single empty div <div></div>

Desired behaviour:

• setting to empty string via API should disable header/footer respectively
• setting whitespace string via API should disable header/footer respectively
• the check if header/footer are needed should run beforehand

[ekta-slit]

API Functionality

• setting to empty string via API uses default header/footer respectively
• setting whitespace string via API uses default header/footer respectively
• setting header/footer to anything else i.e. something, then for footer default value is used ( as footer must have [UNSUBSCRIBE] ) & for header default value is used ( if it doesn't have [MIRROR])