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from flask import current_app, request, url_for
from flask_babel import gettext
from markupsafe import Markup, escape
def render_text_plain(_subtype, content, _path):
return f'<div class="jwm-mail-body-text-plain"><pre>{escape(content)}</pre></div>\n'
def render_text_html(_subtype, _content, path):
if path:
url = url_for(
"read",
msgid=request.view_args["msgid"],
format="raw",
path=".".join(map(str, path)),
)
else:
url = url_for("read", msgid=request.view_args["msgid"], format="raw")
return f'<iframe src="{url}" class="jwm-mail-body-text-html" ></iframe>\n'
def render_image(subtype, content, _path):
return f'<img src="data:image/{subtype};base64,{escape(content)}" />\n'
def render_multipart_alternative(_subtype, content, path):
parts = content["parts"]
T = "<div class=tabs><ul>\n"
C = "<div class=jwm-mail-body-multipart-alternative-bodies>"
init, *rest = reversed(parts)
T += f"<li class=is-active data=0><a>{to_mime_type(init['head'])}</a></li>"
C += "<div class=jwm-mail-body-multipart-alternative-body>\n"
C += mime_render(
*to_mime_types(init["head"]), init["body"], path + (len(parts) - 1,)
)
C += "</div>\n"
for i, r in enumerate(rest, 1):
T += f"<li data={i}><a>{to_mime_type(r['head'])}</a></li>\n"
C += '<div class="jwm-mail-body-multipart-alternative-body is-hidden">\n'
C += mime_render(
*to_mime_types(r["head"]), r["body"], path + (len(parts) - 1 - i,)
)
C += "</div>\n"
C += "</div>"
T += "</ul></div>"
return f'<div class="jwm-mail-body jwm-mail-body-multipart-alternative">\n{T}\n{C}\n</div>\n'
def render_multipart(_subtype, content, path):
parts = content["parts"]
R = '<div class="jwm-mail-body jwm-mail-body-multipart">\n'
for i, p in enumerate(parts):
R += "<div class=media><div class=media-content>\n"
if (
not p["head"]["content_disposition"]
or p["head"]["content_disposition"].lower() == "none"
or p["head"]["content_disposition"].lower() == "inline"
):
R += mime_render(*to_mime_types(p["head"]), p["body"], path + (i,))
elif p["head"]["content_disposition"].lower() == "attachment":
link_text = gettext("Attachment {filename} of type {filetype}").format(
filename=p["head"]["filename"], filetype=to_mime_type(p["head"])
)
ref_url = url_for(
"read",
msgid=request.view_args["msgid"],
path=".".join(map(str, [*path, i])),
format="raw",
)
R += "<p>"
R += f'<a href="{ref_url}" download="{escape(p["head"]["filename"])}">\n'
R += f"{escape(link_text)}</a>\n"
R += "</p>\n"
else:
current_app.log.warning(
"unknown Content-Disposition %s", p["head"]["content_disposition"]
)
R += f"<p>unknown Content-Disposition {p['head']['content_disposition']}</p>\n"
R += "</div></div>\n"
return R + "</div>\n"
def _format_header(category, value):
R = ""
if isinstance(value, list) and value:
R += f"<dt>{escape(category)}</dt>\n"
for v in value:
value = (
f'"{v["display_name"]}" <{v["address"]}>'
if v["display_name"]
else v["address"]
)
R += f"<dd>{escape(value)}<dd>\n"
return R
def render_message(subtype, msg, path):
if subtype != "rfc822":
current_app.log.warning("unknown message mime-subtype %s", subtype)
R = '<div class="jwm-mail">'
R += '<dl class="jwm-mail-header">'
R += f"<dt>{escape(gettext('Subject'))}</dt>"
R += f"<dd>{escape(msg['head']['subject'])}</dd>\n"
R += _format_header(gettext("From"), msg["head"].get("from"))
R += _format_header(gettext("To"), msg["head"].get("to"))
R += _format_header(gettext("CC"), msg["head"].get("cc"))
R += _format_header(gettext("BCC"), msg["head"].get("bcc"))
R += f"<dt>{escape(gettext('Date'))}</dt>"
date = escape(msg["head"]["date"])
R += f"<dd><time datetime='{date}' class=jwm-tolocaltime>{date}</time></dd>\n"
R += f"<dt>{escape(gettext('Content-Type'))}</dt>"
R += f"<dd>{to_mime_type(msg['head']['mime'])}</dd>\n"
R += "</dl>\n"
R += mime_render(*to_mime_types(msg["head"]["mime"]), msg["body"], path + (0,))
return R + "</div>\n"
MIMERenderSubs = {
("text", "plain"): render_text_plain,
("text", "html"): render_text_html,
("multipart", "alternative"): render_multipart_alternative,
"multipart": render_multipart,
"message": render_message,
"image": render_image,
}
def mime_render(maintype, subtype, content, path):
renderer = MIMERenderSubs.get((maintype, subtype)) or MIMERenderSubs.get(maintype)
if not renderer:
typ = f"<code>{maintype}/{subtype}</code>"
msg = gettext("Unsupported MIME type of {mime_type}.").format(mime_type=typ)
return f'<p class="jwm-body-unsupported">{msg}</p>\n'
return renderer(subtype, content, path)
def to_mime_type(mime):
return escape(f"{mime['content_maintype']}/{mime['content_subtype']}".lower())
def to_mime_types(mime):
return escape(mime["content_maintype"]), escape(mime["content_subtype"])
def format_mail(mail):
return Markup(mime_render("message", "rfc822", mail, tuple()))
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