max / makenotwork

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1	//! Rendering helpers: Askama fragment rendering and HTML escaping for raw
2	//! `format!`-built markup.
3
4	/// Render an Askama fragment to an HTML string, surfacing a render failure as an
5	/// `AppError` (mapped to 500 + an `HX-Error` header by the error responder) instead
6	/// of the silent `.render().unwrap_or_default()` blank swap, which installs an
7	/// empty HTMX fragment with no error signal (ultra-fuzz Run 12 doubledown S-A). Use
8	/// this for HTMX fragment handlers that return `Result`.
9	pub fn render_fragment(template: &impl askama::Template) -> crate::error::Result<String> {
10	template.render().map_err(\|e\| {
11	tracing::error!(error = ?e, "fragment render failed");
12	crate::error::AppError::Internal(anyhow::anyhow!("template render failed"))
13	})
14	}
15
16	/// Escape HTML special characters, including `'` so the output is safe in
17	/// single-quoted attribute contexts as well as element text. Use whenever a
18	/// value is interpolated into a raw `format!`-built HTML string instead of an
19	/// auto-escaped template.
20	pub fn escape_html(s: &str) -> String {
21	s.replace('&', "&")
22	.replace('<', "<")
23	.replace('>', ">")
24	.replace('"', """)
25	.replace('\'', "'")
26	}
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