joonas-fi/emergency-details-printout

Website for printing an "emergency details" paper for helping deal with situations that need quick attention

🚨 Putin is a war criminal. Russians are bombing hospitals. 🚨

emergency-details-printout's Issues

Video introduction

introduction.mp4

Migrate to better html2pdf backend

Related to regression in #4 (regressed due to external runtime dep breaking, and the external dep was required due to wkhtmltopdf not supporting emoji fonts without external JS dep)

Best to migrate away from wkhtmltopdf soon. The pain in using that is accumulating.

wkhtmltopdf documents WeasyPrint as free alternative.

A quick Google reveals no quick alternatives that would be better.

WeasyPrint doesn't seem to have any official Docker packaging, however 3rd party option reveals minidocks/weasyprint (at DockerHub) as the most promising alternative (small size + updated recently)

That in itself doesn't support emojis out of the box due to missing emoji font, so need to extend the Dockerfile:

FROM minidocks/weasyprint:latest

RUN apk add --no-cache font-noto-emoji

With that taking the HTML as generated by emergency-details-printout renders acceptably out of the box:

This result was generated based on these commands:

# precondition: have our HTML in testhtml.html
$ docker build -t weasyprint .
$ docker run --rm -v `pwd`:/app -w /app weasyprint testhtml.html testhtml.pdf

TODO:

• Publish weasyprint with the emoji font
• Figure out how Lambda works with containers (if it needs AWS's miserable Container Registry might not be worth the trouble..) and how to overlay our Go-based func on top of that
• Ship weasyprint as new rendering engine to html2pdf
• Remove twemoji crutch from our HTML
• Possibly change html2pdf API to take in our heimlick / resuscitation drawings in the req (repay technical debt: not require downloading images over external HTTP deps)

Icons/glyphs apear to be broken

The icons/glyphs aren't rendering.

Tested using the latest versions of Firefox and Safari on MacOS.

HTML -> PDF engine doesn't support Chinese glyphs

Blocks #2