Files
notifications-admin/app/template_previews.py
Chris Hill-Scott 53724dacd1 Tell template preview whether a letter can be sent internationally
If a service has permission to send international letters then the admin
app should tell template preview, so that template preview knows what
rules to apply when it’s validating the address of the letter.

We don’t need to wait for template preview to start looking at this
query string argument – it will just ignore it for now.
2020-05-01 15:43:54 +01:00

106 lines
3.7 KiB
Python

import base64
from io import BytesIO
import requests
from flask import current_app, json
from notifications_utils.pdf import extract_page_from_pdf
from app import current_service
class TemplatePreview:
@classmethod
def from_database_object(cls, template, filetype, values=None, page=None):
data = {
'letter_contact_block': template.get('reply_to_text', ''),
'template': template,
'values': values,
'filename': current_service.letter_branding and current_service.letter_branding['filename']
}
resp = requests.post(
'{}/preview.{}{}'.format(
current_app.config['TEMPLATE_PREVIEW_API_HOST'],
filetype,
'?page={}'.format(page) if page else '',
),
json=data,
headers={'Authorization': 'Token {}'.format(current_app.config['TEMPLATE_PREVIEW_API_KEY'])}
)
return (resp.content, resp.status_code, resp.headers.items())
@classmethod
def from_valid_pdf_file(cls, pdf_file, page):
pdf_page = extract_page_from_pdf(BytesIO(pdf_file), int(page) - 1)
response = requests.post(
'{}/precompiled-preview.png{}'.format(
current_app.config['TEMPLATE_PREVIEW_API_HOST'],
'?hide_notify=true' if page == '1' else ''
),
data=base64.b64encode(pdf_page).decode('utf-8'),
headers={'Authorization': 'Token {}'.format(current_app.config['TEMPLATE_PREVIEW_API_KEY'])}
)
return (response.content, response.status_code, response.headers.items())
@classmethod
def from_invalid_pdf_file(cls, pdf_file, page):
pdf_page = extract_page_from_pdf(BytesIO(pdf_file), int(page) - 1)
response = requests.post(
'{}/precompiled/overlay.png{}'.format(
current_app.config['TEMPLATE_PREVIEW_API_HOST'],
'?page_number={}'.format(page)
),
data=pdf_page,
headers={'Authorization': 'Token {}'.format(current_app.config['TEMPLATE_PREVIEW_API_KEY'])}
)
return (response.content, response.status_code, response.headers.items())
@classmethod
def from_example_template(cls, template, filename):
data = {
'letter_contact_block': template.get('reply_to_text'),
'template': template,
'values': None,
'filename': filename
}
resp = requests.post(
'{}/preview.png'.format(current_app.config['TEMPLATE_PREVIEW_API_HOST']),
json=data,
headers={'Authorization': 'Token {}'.format(current_app.config['TEMPLATE_PREVIEW_API_KEY'])}
)
return (resp.content, resp.status_code, resp.headers.items())
@classmethod
def from_utils_template(cls, template, filetype, page=None):
return cls.from_database_object(
template._template,
filetype,
template.values,
page=page,
)
def get_page_count_for_letter(template, values=None):
if template['template_type'] != 'letter':
return None
page_count, _, _ = TemplatePreview.from_database_object(template, 'json', values)
page_count = json.loads(page_count.decode('utf-8'))['count']
return page_count
def sanitise_letter(pdf_file, *, allow_international_letters):
return requests.post(
'{}/precompiled/sanitise?allow_international_letters={}'.format(
current_app.config['TEMPLATE_PREVIEW_API_HOST'],
'true' if allow_international_letters else 'false',
),
data=pdf_file,
headers={'Authorization': 'Token {}'.format(current_app.config['TEMPLATE_PREVIEW_API_KEY'])}
)