fix: Made ticket invoice generation similar to tickets

[mrsaicharan1]

Fixes #5878

Checklist

• I have read the Contribution & Best practices Guide and my PR follows them.
• My branch is up-to-date with the Upstream development branch.
• The unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

• All the functions created/modified in this PR contain relevant docstrings.

Short description of what this resolves:

Generates a proper pdf which is served over a route instead of the current snapshot technique for order invoices.

Changes proposed in this pull request:

• Added method for generating invoices
• Route for serving invoices
• Added static HTML page for invoice

[houndci-bot]

expected 2 blank lines, found 1

[codecov]

Codecov Report

Merging #5886 into development will decrease coverage by 0.06%.
The diff coverage is 11.76%.

@@               Coverage Diff               @@
##           development    #5886      +/-   ##
===============================================
- Coverage         66.6%   66.54%   -0.07%     
===============================================
  Files              286      286              
  Lines            13902    13919      +17     
===============================================
+ Hits              9260     9262       +2     
- Misses            4642     4657      +15

Impacted Files	Coverage Δ
app/api/helpers/storage.py	59.29% <ø> (ø)	⬆️
app/api/helpers/order.py	38.7% <0%> (-0.64%)	⬇️
app/api/auth.py	19.02% <12.5%> (-0.56%)	⬇️

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[mrsaicharan1]

@uds5501 @shreyanshdwivedi @iamareebjamal Please review

[abhinavk96]

Can you give a preview of a sample invoice, also I don't see the billing info in the template.

[mrsaicharan1]

Can you give a preview of a sample invoice, also I don't see the billing info in the template.
Will update the billing info and post a preview.

[mrsaicharan1]

Can you give a preview of a sample invoice, also I don't see the billing info in the template.

[mariobehling]

Thanks a lot! This is a step in the right direction. We need additional information in the invoice.

• Event Information -> What is the invoice for
• Tax of each item
• Overall tax

We also need a way to reflect the different way tax is handled in Europe/Asia and the US:

• In Europe tax is included in the ticket price (but we still need to show how much it is)
• In the US tax is added on top of each item

This is also an option in the tax info.

Below is an example of an invoice from eventbrite (for events - we need just the same structure but for tickets)

[mariobehling]

To make the tax statement clearer I would appreciate if you could make this slightly different to eventbrite and show the tax in % and in numbers. Also show the price below the table as follows.

[abhinavk96]

@mrsaicharan1 feel free to break this up into multiple PRs and issues. Make this one the parent issue.

…

On Thu, 16 May 2019 at 4:52 PM, Mario Behling ***@***.***> wrote: To make the tax statement clearer I would appreciate if you could make this slightly different to eventbrite and show the tax in % and in numbers. Also show the price below the table as follows. [image: Screenshot from 2019-05-16 10-50-26] <https://user-images.githubusercontent.com/1583873/57840282-9d6f6a80-77c8-11e9-9a23-8473487ea09c.png> — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#5886?email_source=notifications&email_token=AEDUDRN5QVFXRPLJT275YODPVUOC7A5CNFSM4HNCDKCKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODVREIVY#issuecomment-492979287>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEDUDRJ4KALP5MDOHGUWDALPVUOC7ANCNFSM4HNCDKCA> .

[mrsaicharan1]

@mariobehling @CosmicCoder96 Will make the issue related to this as a parent issue.
Will create another issue+PR for
Making the Order Invoice similar to EventBrite(Attaching the Tax amount too as well). If the order invoice generation is fine here, would request you to merge this.

stale

[iamareebjamal]

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