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email: optional logo image in the header

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A configurable logo URL renders as an image beside the brand name in the
email header (falling back to the brand text when unset). Email clients
need a hosted image, so it takes a URL rather than an inline asset.
This commit is contained in:
Jean Chevronnet 2026-07-12 16:36:06 +00:00
parent 98630c7d36
commit bdcce01f11
No known key found for this signature in database
7 changed files with 41 additions and 9 deletions
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25
src/email.rs
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@ -9,8 +9,23 @@ pub struct Mail {
const BASE: &str = include_str!("../templates/email/base.html");
fn render(brand: &str, accent: &str, title: &str, message: &str, code: &str, note: &str) -> String {
BASE.replace("{{brand}}", &escape(brand))
// The masthead: a logo image beside the brand name when a logo URL is set,
// otherwise the brand name as an accent eyebrow.
fn brand_mark(brand: &str, accent: &str, logo: &str) -> String {
let (brand, accent) = (escape(brand), escape(accent));
if logo.is_empty() {
format!("<span style=\"font-size:12px;font-weight:700;letter-spacing:1.6px;text-transform:uppercase;color:{accent};\">{brand}</span>")
} else {
format!(
"<img src=\"{}\" width=\"40\" height=\"40\" alt=\"\" style=\"display:inline-block;border-radius:9px;vertical-align:middle;\"><span style=\"display:inline-block;margin-left:12px;vertical-align:middle;font-size:18px;font-weight:800;letter-spacing:.2px;color:#0f172a;\">{brand}</span>",
escape(logo)
)
}
}
fn render(brand: &str, accent: &str, logo: &str, title: &str, message: &str, code: &str, note: &str) -> String {
BASE.replace("{{brand_mark}}", &brand_mark(brand, accent, logo))
.replace("{{brand}}", &escape(brand))
.replace("{{accent}}", &escape(accent))
.replace("{{title}}", &escape(title))
.replace("{{message}}", &escape(message))
@ -18,7 +33,7 @@ fn render(brand: &str, accent: &str, title: &str, message: &str, code: &str, not
.replace("{{note}}", &escape(note))
}
pub fn reset(brand: &str, accent: &str, account: &str, code: &str) -> Mail {
pub fn reset(brand: &str, accent: &str, logo: &str, account: &str, code: &str) -> Mail {
Mail {
subject: format!("Password reset for {account}"),
text: format!(
@ -27,6 +42,7 @@ pub fn reset(brand: &str, accent: &str, account: &str, code: &str) -> Mail {
html: render(
brand,
accent,
logo,
"Password reset",
&format!("Use this code to reset the password for your account {account}."),
code,
@ -35,7 +51,7 @@ pub fn reset(brand: &str, accent: &str, account: &str, code: &str) -> Mail {
}
}
pub fn confirm(brand: &str, accent: &str, account: &str, code: &str) -> Mail {
pub fn confirm(brand: &str, accent: &str, logo: &str, account: &str, code: &str) -> Mail {
Mail {
subject: format!("Confirm your {account} registration"),
text: format!(
@ -44,6 +60,7 @@ pub fn confirm(brand: &str, accent: &str, account: &str, code: &str) -> Mail {
html: render(
brand,
accent,
logo,
"Confirm your account",
&format!("Welcome! Confirm the email for your account {account} with the code below."),
code,