Add utm_* parameters to Facebook and Twitter shares

[wwahammy]

Currently, the Facebook and Twitter share buttons in the followup pane of the donation wizard include a link to the donation page. That donation page link does not include any utm_* parameter. For Houdini instances which use analytics on their donation/campaign/event pages, it would be useful for those shares to include the utm_* parameters so people can better track which donations came from which source.

IMPORTANT PRIVACY NOTE: we should avoid including utm_* parameter values which are so specific that we can track inbound traffic by individual user.

[Philwi]

Hey, should the utm_parameters be configurable for the users or should they be generated by the given data. Like the actual campaign etc.? Should the parameters always be sent or just if an utm-configuration is toggled?
There are these utm-paramenters: https://en.wikipedia.org/wiki/UTM_parameters

I could imagine that the source parameter is auto-generated but the rest of it is configured by the user.

Am I right that there are no integration tests but the tests for the react components?

If there would be some guidance I would start with this ticket. :)

[victordscabral]

Hi! Since there is no recent update in this issue me (@victordscabral), @kayrocesar and @joaobisi will work on it.

[victordscabral]

@wwahammy. A doubt. Is this the file to add the utm parameters?

[victordscabral]

Link to the PR: #1473