Mollie integration (#3)

[mrPauwHaan]

Solves: #29 #58

Added a Mollie integration for Frappe webforms. Mollie is a big payment provider within Europe and, therefore, an essential for many SMEs who want to use Frappe for handling payments

1. This update integrates Mollie as a payment method in web forms
2. The user is automatically redirected to a checkout page to review the order, and a payment is automatically generated. It is necessary to have a field within your doctype called payment_id where the Mollie Payment ID is stored.
3. The user will be redirected to the Mollie-hosted checkout page, so you can configure any payment method within Mollie and create your own checkout.
4. When the payment is completed, the user is redirected back to the checkout page, where the payment status is automatically verified with Mollie based on the stored payment ID. When the Mollie payment link has expired, a new payment will automatically be generated on the checkout page, if the payment has not been completed yet.
5. When the payment is completed, the payment url will not be available anymore, and the user will be redirected back to the webform redirect URL.

Optional: create a payment_status field where the status of the payment is automatically stored.
Optional: Use Mollie in test mode by using the test api key in the mollie settings page. Mollie automatically recognizes it as a test payment.

[mrPauwHaan]

When will this be merged?

[torstenhoegel]

+1 for looking into this. Really important to my company for switching to erpnext

[torstenhoegel]

@trustedcomputer could you pls look into this?

[trustedcomputer]

@torstenhoegel I don't have any write access to the repository. You'll need to find a frappe maintainer to get this moving.

[torstenhoegel]

@NagariaHussain hey, could you please prioritise this? :) thx

[NagariaHussain]

Can you attach a video of the working flow?

[mrPauwHaan]

It is now also compatible with the ability to pay at other moments than only after submitting the web form. This can be used for example in the case where users have a personal account page with "outstanding payments", where you can link them to the checkout page if the payment_status is not "Completed".

Also, before todays changes the Mollie payment status was retrieved from the Mollie API, but I changed this to be overrided when the payment_status field is "Completed". This can be used for whatever reason when you want to manually change the payment_status to "Completed" (e.g. user pays via other sources).

[mrPauwHaan]

Can you attach a video of the working flow?

@NagariaHussain see the video below for the showcase. In the video, I change the payment status manually to "Completed", but obviously this happens automatically after payment

https://youtu.be/0NwQZI6wNg0

[mrPauwHaan]

@NagariaHussain @pateljannat @blaggacao when will this be merged? You can find a showcase video above

[blaggacao]

There's a refactoring going on, taking shape, being validated over at #53

I haven't updated the PR with the lastest additions and bug fixes from production operation.

I think it is worthwhile to hold back on a merge until the new api stabilizes and then refactor.

I can try to push more fixes/additions, I planned to do that anyway, but now that I know there's a stakeholder I might be even more motivated to get this done 😄

Thanks for the ping!! These are just my 2 cents from a maintenance perspective.

[blaggacao]

PS: If maintenance sharing is less of an issue, for purposes of discoverability, we could add this PR right now to the readme with a caveat. Users can then deploy from this PR/branch and can report their issues here.

Because I agree, Mollie is important in EU!

[mrPauwHaan]

@blaggacao Thank you for your extensive response. I did not know a refactor was happening, so it makes sense to await the new API. In the meantime, adding it to the readme would indeed help people who need this integration find it easier.

[blaggacao]

ef713a2

[timeo-schmidt]

This would be important for us too! Any updates on when this will be merged?

[mrPauwHaan]

@timeo-schmidt As mentioned above, the Payments module is being refactored in #53. When that is stable and the new API is out, this PR needs be be refactored as well and can be merged after.

However, you can still manually use this PR to be able to use the Mollie integration. That is also what I did.

[0spinboson]

Thanks for submitting this, MrPauwhaan! Just to check (obviously 'no' is fine): do you ever intend to submit something to connect mollie's payment dashboard to the accounting module?

[mrPauwHaan]

@0spinboson I was recently thinking about working on that, so yes, the intention is there (especially since the Plaid integration in ERPNext no longer works). However, time is my biggest constraint. I am not great with coding, so I wrote this by making many mistakes and spending a lot of time on it.

Please let me know which features you would like to have. I will consider those if/when I will extend this integration to the payment dashboard

[0spinboson]

@0spinboson I was recently thinking about working on that, so yes, the intention is there (especially since the Plaid integration in ERPNext no longer works). However, time is my biggest constraint. I am not great with coding, so I wrote this by making many mistakes and spending a lot of time on it.

Please let me know which features you would like to have. I will consider those if/when I will extend this integration to the payment dashboard

Well, I recently looked into ERPNext because I'm looking for an alternative to our current bookkeeping/CMS/CRM (and perhaps sales) systems (we're a nonprofit membership association). But I didn't get very far because of the Plaid integration being gone, and I at the very least need to be able to generate invoice/debit batches to send to our bank, if we are to ever switch to this for our membership management and dues administration needs.

In terms of Mollie, we use it both for sales and incoming donations. I'd like a way to get the payment details mollie has listed so I can properly book all the costs and revenues, as well as any/all donations that come in, since there isn't an easy way to get that info from mollie without manual administration.