106 lines
3.9 KiB
Rust
106 lines
3.9 KiB
Rust
use tera::{Tera, Context};
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use errors::Result;
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static DEFAULT_TPL: &str = include_str!("default_tpl.html");
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macro_rules! render_default_tpl {
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($filename: expr, $url: expr) => {
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{
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let mut context = Context::new();
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context.add("filename", $filename);
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context.add("url", $url);
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Tera::one_off(DEFAULT_TPL, &context, true).map_err(|e| e.into())
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}
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};
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}
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/// Renders the given template with the given context, but also ensures that, if the default file
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/// is not found, it will look up for the equivalent template for the current theme if there is one.
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/// Lastly, if it's a default template (index, section or page), it will just return an empty string
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/// to avoid an error if there isn't a template with that name
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pub fn render_template(name: &str, tera: &Tera, context: &Context, theme: &Option<String>) -> Result<String> {
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if tera.templates.contains_key(name) {
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return tera
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.render(name, context)
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.map_err(|e| e.into());
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}
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if let &Some(ref t) = theme {
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return tera
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.render(&format!("{}/templates/{}", t, name), context)
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.map_err(|e| e.into());
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}
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// maybe it's a default one?
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match name {
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"index.html" | "section.html" => {
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render_default_tpl!(name, "https://www.getgutenberg.io/documentation/templates/pages-sections/#section-variables")
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},
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"page.html" => {
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render_default_tpl!(name, "https://www.getgutenberg.io/documentation/templates/pages-sections/#page-variables")
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},
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"tag.html" | "tags.html" | "category.html" | "categories.html" => {
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render_default_tpl!(name, "https://www.getgutenberg.io/documentation/templates/tags-categories/")
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},
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_ => bail!("Tried to render `{}` but the template wasn't found", name)
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}
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}
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/// Rewrites the path from extend/macros of the theme used to ensure
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/// that they will point to the right place (theme/templates/...)
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/// Include is NOT supported as it would be a pain to add and using blocks
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/// or macros is always better anyway for themes
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/// This will also rename the shortcodes to NOT have the themes in the path
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/// so themes shortcodes can be used.
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pub fn rewrite_theme_paths(tera: &mut Tera, theme: &str) {
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let mut shortcodes_to_move = vec![];
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// We want to match the paths in the templates to the new names
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for tpl in tera.templates.values_mut() {
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// First the parent if there is none
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if let Some(ref p) = tpl.parent.clone() {
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tpl.parent = Some(format!("{}/templates/{}", theme, p));
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}
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// Next the macros import
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let mut updated = vec![];
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for &(ref filename, ref namespace) in &tpl.imported_macro_files {
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updated.push((format!("{}/templates/{}", theme, filename), namespace.to_string()));
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}
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tpl.imported_macro_files = updated;
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if tpl.name.starts_with(&format!("{}/templates/shortcodes", theme)) {
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let new_name = tpl.name.replace(&format!("{}/templates/", theme), "");
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shortcodes_to_move.push((tpl.name.clone(), new_name.clone()));
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tpl.name = new_name;
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}
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}
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// and then replace shortcodes in the Tera instance using the new names
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for (old_name, new_name) in shortcodes_to_move {
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let tpl = tera.templates.remove(&old_name).unwrap();
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tera.templates.insert(new_name, tpl);
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}
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}
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#[cfg(test)]
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mod tests {
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use tera::Tera;
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use super::rewrite_theme_paths;
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#[test]
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fn can_rewrite_all_paths_of_theme() {
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let mut tera = Tera::parse("test-templates/*.html").unwrap();
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rewrite_theme_paths(&mut tera, "hyde");
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// special case to make the test work: we also rename the files to
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// match the imports
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for (key, val) in tera.templates.clone() {
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tera.templates.insert(format!("hyde/templates/{}", key), val.clone());
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}
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tera.build_inheritance_chains().unwrap();
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}
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}
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