simple custom template_tags for Django/Wagtail

strings_tags.py

from django import template
from wagtail.images.models import Image
from django.utils.safestring import mark_safe


register = template.Library()


@register.filter(needs_autoescape=True)
def replace(value, arg, autoescape=True):
    if arg == "[but]": result = value.replace(arg, "<button style='font-size:1.5rem; padding: .5rem; margin: .25rem; text-align: center; box-shadow: 0 0 .5rem blue;'>")
    if arg == "[s.5]": result = value.replace(arg, "<span style='font-size: .5rem !important;'>")
    if arg == "[s1]": result = value.replace(arg, "<span style='font-size:1rem !important;'>")
    elif arg == "[s1.2]": result = value.replace(arg, "<span style='font-size:1.2rem !important;'>")
    elif arg == "[s1.4]": result = value.replace(arg, "<span style='font-size:1.4rem !important;'>")
    elif arg == "[s1.6]": result = value.replace(arg, "<span style='font-size:1.6rem !important;'>")
    elif arg == "[s1.8]": result = value.replace(arg, "<span style='font-size:1.8rem !important;'>")
    elif arg == "[s2]": result = value.replace(arg, "<span style='font-size:2rem !important;'>")
    elif arg == "[s2.2]": result = value.replace(arg, "<span style='font-size:2.2rem !important;'>")
    elif arg == "[s2.4]": result = value.replace(arg, "<span style='font-size:2.4rem !important;'>")
    elif arg == "[s2.6]": result = value.replace(arg, "<span style='font-size:2.6rem !important;'>")
    elif arg == "[s2.8]": result = value.replace(arg, "<span style='font-size:2.8rem !important;'>")
    elif arg == "[s3]": result = value.replace(arg, "<span style='font-size:3rem !important;'>")
    elif arg == "[s3.2]": result = value.replace(arg, "<span style='font-size:3.2rem !important;'>")
    elif arg == "[s3.4]": result = value.replace(arg, "<span style='font-size:3.4rem !important;'>")
    elif arg == "[s3.6]": result = value.replace(arg, "<span style='font-size:3.6rem !important;'>")
    elif arg == "[s3.8]": result = value.replace(arg, "<span style='font-size:3.8rem !important;'>")
    elif arg == "[s4]": result = value.replace(arg, "<span style='font-size:4rem !important;'>")
    elif arg == "[s4.2]": result = value.replace(arg, "<span style='font-size:4.2rem !important;'>")
    elif arg == "[s4.4]": result = value.replace(arg, "<span style='font-size:4.4rem !important;'>")
    elif arg == "[s4.6]": result = value.replace(arg, "<span style='font-size:4.6rem !important;'>")
    elif arg == "[s4.8]": result = value.replace(arg, "<span style='font-size:4.8rem !important;'>")
    elif arg == "[s5]": result = value.replace(arg, "<span style='font-size:5rem !important;'>")
    elif arg == "[s5.2]": result = value.replace(arg, "<span style='font-size:5.2rem !important;'>")
    elif arg == "[s5.4]": result = value.replace(arg, "<span style='font-size:5.4rem !important;'>")
    elif arg == "[s5.6]": result = value.replace(arg, "<span style='font-size:5.6rem !important;'>")
    elif arg == "[s5.8]": result = value.replace(arg, "<span style='font-size:5.8rem !important;'>")
    elif arg == "[s6]": result = value.replace(arg, "<span style='font-size:6rem !important;'>")
    elif arg == "[s6.2]": result = value.replace(arg, "<span style='font-size:6.2rem !important;'>")
    elif arg == "[s6.4]": result = value.replace(arg, "<span style='font-size:6.4rem !important;'>")
    elif arg == "[s6.6]": result = value.replace(arg, "<span style='font-size:6.6rem !important;'>")
    elif arg == "[s6.8]": result = value.replace(arg, "<span style='font-size:6.8rem !important;'>")
    elif arg == "[s7]": result = value.replace(arg, "<span style='font-size:7rem !important;'>")
    elif arg == "[r]": result = value.replace(arg, "<span style='color: red !important;'>")
    elif arg == "[dr]": result = value.replace(arg, "<span style='color: darkred !important;'>")
    elif arg == "[g]": result = value.replace(arg, "<span style='color: green !important;'>")
    elif arg == "[dg]": result = value.replace(arg, "<span style='color: darkgreen !important;'>")
    elif arg == "[b]": result = value.replace(arg, "<span style='color: blue !important;'>")
    elif arg == "[db]": result = value.replace(arg, "<span style='color: darkblue !important;'>")
    elif arg == "[p]": result = value.replace(arg, "<span style='color: purple !important;'>")
    elif arg == "[dp]": result = value.replace(arg, "<span style='color: darkpurple !important;'>")
    elif arg == "[y]": result = value.replace(arg, "<span style='color: yellow !important;'>")
    elif arg == "[dy]": result = value.replace(arg, "<span style='color: darkyellow !important;'>")
    elif arg == "[]": result = value.replace(arg, "<span style='color: var(--main_color) !important;'>")
    elif arg == "[sp]": result = value.replace(arg, "&nbsp; ")
    elif arg == "[nl]": result = value.replace(arg, "<br>")
    return mark_safe(result)

@register.filter()
def to_string(value):
    return str(value)

@register.filter()
def ends_with(value, args):
    return value.endswith(args)


@register.filter() 
def has_group(user, group_name=None, ends_with=None, starts_with=None, has=None):
    
    if not ends_with and not starts_with and not has:
        # return user.groups.filter(name=group_name).exists() 
        return group_name in [ gn[0] for gn in user.groups.values_list('name')] 

    elif not ends_with and not starts_with:
        if has in group_name:
            grp_name = group_name 
        return user.groups.filter(name=grp_name).exists() 

    elif not ends_with and not has:
        grp_name = group_name.startswith(starts_with)
        return user.groups.filter(name=grp_name).exists() 

    elif not has and not starts_with:
        grp_name = group_name.endswith(ends_with)
        return user.groups.filter(name=grp_name).exists()