/
Render.pm6
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Render.pm6
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use v6;
use Uzu::Logger;
use Uzu::Utilities;
use File::Find;
use YAMLish;
use Template6;
use Template::Mustache;
unit module Uzu::Render;
sub templates(
List :$exts!,
IO::Path :$dir!
--> Seq
) {
find( :$dir, name => /'.' @$exts $/ );
}
sub i18n-files(
Str :$language,
IO::Path :$dir!
--> Seq
) {
find :$dir, name => / $language '.yml' $/, type => 'file';
}
sub i18n-from-yaml(
Str :$language,
IO::Path :$i18n_dir,
::D :&logger,
--> Hash
) {
state %i18n = %();
map -> $i18n_file {
logger "i18n yaml file [$i18n_file] could not be loaded" unless $i18n_file.IO.f;
try {
CATCH {
default {
logger "Invalid i18n yaml file [$i18n_file]";
logger .Str;
}
}
my %yaml = load-yaml slurp($i18n_file, :r);
my $key = $i18n_file.dirname.split('i18n')[1] || $language;
%i18n{$key}<i18n> = %yaml;
%i18n{$key}<modified> = $i18n_file.modified;
}
}, i18n-files(:$language, dir => $i18n_dir);
return %i18n;
}
sub i18n-valid-hash(
%h
--> Bool
) {
so %h.values.all ~~ Pair;
}
sub i18n-context-vars(
Str :$language,
IO::Path :$path,
Hash :$context
) {
my Str $i18n_key = ($path.IO.path ~~ / .* 'pages' (.*) '.' .* / ).head.Str;
return %( |$context,
i18n => %( ( $context{$language}<i18n>.defined ?? |$context{$language}<i18n> !! %()),
# Page-specific i18n vars?
( $context{$i18n_key}.defined ?? |$context{$i18n_key}<i18n> !! %())));
}
sub html-file-name(
Str :$page_name,
Str :$default_language,
Str :$language
--> Str
) {
return "{$page_name}-{$language}" when $language !~~ $default_language;
return $page_name;
}
sub page-uri(
Str :$page_name,
Str :$out_ext,
Str :$default_language,
Str :$language,
Str :$i18n_format = 'default'
--> Str
) {
return do given $i18n_format {
when 'subfolder' {
"/{$language}/{$page_name}.{$out_ext}";
}
default {
'/' ~ html-file-name(:$page_name, :$default_language, :$language) ~ ".{$out_ext}";
}
}
}
multi sub inject-linked-pages($p, :$template_engine, :&expand-linked-pages) {$p}
multi sub inject-linked-pages(
Iterable $p,
:$template_engine,
:&expand-linked-pages
) {
my $n = $p.map({
.&inject-linked-pages(:$template_engine, :&expand-linked-pages);
}).map({
.&inject-linked-pages(:$template_engine, :&expand-linked-pages);
});
if $n.cache.values.all ~~ Pair {
$n.cache.Hash;
} elsif $n.cache.values.any ~~ Hash|Pair {
$template_engine ~~ 'mustache'
?? $n.cache.List
!! $n.cache.Hash;
} else {
$n.cache;
}
}
multi sub inject-linked-pages(
Hash $p,
:$template_engine,
:&expand-linked-pages
--> Hash()
) {
map -> $k, $v {
if $k ~~ /'_pages'$/ {
expand-linked-pages(block_key => $k, pages => $v).Hash;
} else {
$k => inject-linked-pages($v, :$template_engine, :&expand-linked-pages);
}
}, kv $p;
}
sub linked-pages(
Str :$base_page,
Str :$block_key,
:@pages,
Hash :$page_vars,
Hash :$site_index,
Str :$default_language,
Str :$language,
Str :$i18n_format = 'default',
:@timestamps,
::D :&logger
) {
my %linked_pages;
map -> %vars {
my $key = %vars<page>;
my $url = ($key ~~ / '://' / || !$site_index{$key})
?? $key
!! page-uri page_name => $key, :$default_language, :$language, out_ext => $site_index{$key}<out_ext>;
logger "Broken link in template [$base_page]: page [$key] referenced in [$block_key] not found" when $key !~~ /'://'/ && !$site_index{$key};
push @timestamps, $site_index{$key}<modified>;
push %linked_pages{$block_key}, grep({ .value }, [
|$site_index{$key}.Hash,
# use the variables defined in the _pages block if set
page => $key,
url => $url,
title => $site_index{$key}<title> ||%vars<title>,
author => $site_index{$key}<author> ||%vars<author>||'',
date => $site_index{$key}<date> ||'',
modified => $site_index{$key}<modified>
]).Hash;
}, @pages;
return %linked_pages;
}
sub extract-file-parts(
IO::Path $path,
Str $pages_dir
--> List
) {
my $relative_path = S/ $pages_dir // given $path.IO.path;
my $file_name = S/'.tt'|'.mustache'$// given (S/^\/// given $relative_path);
my ($page_name, $out_ext) = split '.', $file_name;
my $target_dir = $relative_path.IO.parent.path;
return $page_name, ($out_ext||'html'), $target_dir;
}
sub write-generated-file(
Pair $content,
IO::Path :$build_dir
--> Bool()
) {
# IO write to disk
my $page_name = $content.key;
my %meta = $content.values[0];
my $html = %meta<html>;
my $target_dir = $build_dir.IO.child(%meta<target_dir>.IO);
mkdir $target_dir when !$target_dir.IO.d;
spurt $build_dir.IO.child("{$page_name}.{%meta<out_ext>}"), $html;
}
our sub process-livereload(
Str :$content,
Bool :$no_livereload
--> Str
) {
return '' when !$content.defined;
unless $no_livereload {
# Add livejs if live-reload enabled (default)
my Str $livejs = '<script src="/uzu/js/live.js"></script>';
if $content ~~ /'</body>'/ {
return S/'</body>'/$livejs\n<\/body>/ given $content;
} else {
return $content ~ "\n$livejs";
}
}
return $content;
}
sub prepare-html-output(
Str :$page_name,
Str :$default_language,
Str :$language,
Str :$layout_contents,
Bool :$no_livereload,
IO::Path :$path,
Str :$target_dir,
Str :$out_ext
--> Pair
) {
# Default file_name without prefix
my Str $file_name =
html-file-name
:$page_name,
:$default_language,
:$language;
# Return processed HTML
my Str $html =
process-livereload
content => $layout_contents,
no_livereload => $no_livereload;
return $file_name => %{
:$path,
:$html,
:$target_dir,
:$out_ext
}
}
sub parse-template(
IO::Path :$path,
::D :&logger
--> List
) {
# Extract header yaml if available
try {
CATCH {
default {
logger "Invalid template yaml [$path]";
logger .Str;
}
}
my ($template_yaml, $template_html) = ~<< ( slurp($path, :r) ~~ / ( ^^ '---' .* '---' | ^^ ) [\v]? (.*) / );
my %yaml = $template_yaml ?? load-yaml $template_yaml !! %();
return $template_html, %yaml;
}
}
sub build-partials-hash(
IO::Path :$source,
List :$exts,
::D :&logger
) {
map -> $path {
next unless $path.IO.f;
my Str ($partial_name, $out_ext, $target_dir) = extract-file-parts($path, $source.IO.path);
# Extract header yaml if available
my ($partial_html, %partial_vars) = parse-template :$path, :&logger;
%( $partial_name => %{
path => $path,
html => $partial_html,
vars => %partial_vars,
out_ext => $out_ext,
target_dir => $target_dir,
modified => $path.modified });
}, templates(exts => $exts, dir => $source);
}
multi sub partial-names(
'mustache',
Str $template
--> List
) {
~<< ( $template ~~ m:g/ '{{>' \h* <( \N*? )> \h* '}}' / );
}
multi sub partial-names(
'tt',
Str $template
--> List
) {
~<< ( $template ~~ m:g/ '[% INCLUDE' \h* '"' <( \N*? )> '"' \h* '%]' / );
}
sub embedded-partials(
Str :$template_engine,
Hash :$partials_all,
Hash :$embedded_partials is copy,
Array :$partial_keys,
Hash :$context,
List :$modified_timestamps is copy = [],
List :$partial_render_queue is copy = [],
:$t6
--> List
) {
# Prerender any embedded partials
for $partials_all{|@$partial_keys}:kv -> $partial_name, %partial {
my @partial_keys = partial-names($template_engine, %partial<html>);
@partial_keys.hyper.map: -> $embedded_partial_name {
my %context = |$context, |%partial<vars>, |$partials_all{$embedded_partial_name}<vars>;
($modified_timestamps, $partial_render_queue, $embedded_partials) =
embedded-partials
:$template_engine,
:$partials_all,
:$embedded_partials,
:@partial_keys,
:%context,
:$modified_timestamps,
:$partial_render_queue,
t6 => $t6||'';
push $modified_timestamps, $partials_all{$embedded_partial_name}<modified>;
push $partial_render_queue, &{
given $template_engine {
when 'mustache' {
$embedded_partials{$embedded_partial_name} =
render-template
'mustache',
context => %context,
content => $partials_all{$embedded_partial_name}<html>,
from => [$embedded_partials];
}
when 'tt' {
render-template
'tt',
context => %context,
template_name => $embedded_partial_name,
content => $partials_all{$embedded_partial_name}<html>,
t6 => $t6;
}
}
}
}
}
return [$modified_timestamps, $partial_render_queue, $embedded_partials];
}
multi sub render-template(
'mustache',
Hash :$context,
Str :$content,
Array :$from = [],
::D :&logger
) {
Template::Mustache.render: $content, $context, from => $from;
}
multi sub render-template(
'tt',
Hash :$context,
Str :$template_name,
Str :$content,
Template6 :$t6,
::D :&logger
) {
try {
CATCH {
default {
logger "Error rendering template [{S/'_'$// given $template_name}]";
logger "Template6: {.Str}";
}
}
if $content && $context {
# Store and Render
$t6.add-template: "{$template_name}_", $content;
$t6.add-template: $template_name, $t6.process("{$template_name}_", |$context);
} elsif !$context {
# Store template
$t6.add-template: $template_name, $content;
} else {
# Render a stored template
$t6.add-template: $template_name, $t6.process($template_name, |$context);
}
}
}
multi sub render(
Hash $context,
Supplier :$page_queue,
Str :$template_engine,
IO::Path :$build_dir,
Str :$layout_template,
Hash :$layout_vars,
Numeric :$layout_modified,
Str :$theme,
List :$themes,
IO::Path :$theme_dir,
Str :$default_language,
Str :$language,
Hash :$pages,
List :$exclude_pages,
Hash :$partials_all,
Hash :$site_index,
Bool :$no_livereload,
::D :&logger
) {
my Any %global_vars =
language => $language,
"lang_{$language}" => True,
"theme_{$theme}" => True,
layout => $layout_vars,
|%( $context{$language}.defined ?? |$context{$language} !! %() );
my @layout_partials = partial-names $template_engine, $layout_template;
for $pages.sort({ $^a.values[0]<modified> < $^b.values[0]<modified> }) -> $page {
my Str $page_name = $page.key;
my Any %page = $page.values[0];
my @page_partials = partial-names $template_engine, %page<html>;
my Bool $nolayout = %page<vars><nolayout>.defined || $layout_template ~~ '';
# Skip rendering when this page hasn't been modified or is
# specifically excluded in config.yml
next unless %page<render> && $exclude_pages !(cont) $page_name;
$page_queue.emit: &{
# When was this page last rendered?
my $last_render_time =
$language ~~ $default_language
?? "{$build_dir}/{$page_name}.{%page<out_ext>}".IO.modified||0
!! ($build_dir ~ page-uri :$page_name, :$default_language, :$language, out_ext => %page<out_ext>).IO.modified||0;
# Capture i18n, template, layout, and partial modified timestamps
my @modified_timestamps = [$layout_modified, %page<modified>];
my @partial_render_queue;
# i18n file timestamps
push @modified_timestamps, |(map { .values[0]<modified> }, $context);
# Append page-specific i18n vars if available
my Any %i18n_vars = i18n-context-vars path => %page<path>, :$context, :$language;
# Prepare page links from *_pages yaml blocks
my $page_vars = inject-linked-pages(
%page<vars>, :$template_engine, expand-linked-pages => ->
:$base_page = $page_name,
:$block_key,
:$pages,
:$r_site_index = $site_index,
:$r_default_language = $default_language,
:$r_language = $language {
linked-pages(
:$base_page,
:$block_key,
:$pages,
site_index => $r_site_index,
default_language => $r_default_language,
language => $r_language,
timestamps => @modified_timestamps)
}
);
# Render engine storage
my Template6 $t6 .= new when $template_engine ~~ 'tt';
my Any %partials = %() when $template_engine ~~ 'mustache';
# Prepare base context variables
my %base_context = |%global_vars, |%i18n_vars, |$page_vars;
my ($modified_timestamps, $partial_render_queue) =
embedded-partials
template_engine => $template_engine,
partials_all => $partials_all,
embedded_partials => %partials,
partial_keys => [|@layout_partials, |@page_partials],
context => %base_context,
modified_timestamps => @modified_timestamps,
partial_render_queue => @partial_render_queue,
t6 => $t6||'';
@modified_timestamps = @$modified_timestamps;
@partial_render_queue = @$partial_render_queue;
# Render top-level partials content
map -> $partial_name, %partial {
my %context = |%base_context, |%partial<vars>;
push @modified_timestamps, %partial<modified>;
push @partial_render_queue, &{
given $template_engine {
when 'mustache' {
%partials{$partial_name} =
render-template
'mustache',
context => %context,
content => %partial<html>,
from => [%partials],
logger => &logger;
}
when 'tt' {
render-template
'tt',
context => %context,
template_name => $partial_name,
content => %partial<html>,
t6 => $t6,
logger => &logger;
}
}
}
}, $partials_all{|@page_partials, |@layout_partials}:kv;
# Skip rendering if layout, page, or partial templates
# have not been modified
next when max(@modified_timestamps) < $last_render_time;
# Continue... render partials
@partial_render_queue>>.();
my %context = |%base_context, :$site_index;
# Render the page content
my Str $page_contents = do given $template_engine {
when 'mustache' {
render-template
'mustache',
context => %context,
content => %page<html>,
from => [%partials],
logger => &logger;
}
when 'tt' {
# Cache template
render-template
'tt',
template_name => "{$page_name}_",
content => %page<html>,
t6 => $t6;
render-template
'tt',
template_name => "{$page_name}_",
context => %context,
t6 => $t6,
logger => &logger;
}
}
logger "No content found for page [$page_name] " when $page_contents ~~ '';
# Append page content to $context
my Str $layout_contents = do given %page<out_ext> {
my %context = |%base_context, :$site_index;
when 'html' {
$nolayout
?? $page_contents
!! do given $template_engine {
when 'mustache' {
render-template
'mustache',
context => %context,
content => $layout_template,
from => [%( |%partials, content => $page_contents )],
logger => &logger;
}
when 'tt' {
# Cache layout template
render-template
'tt',
template_name => 'layout',
content => $layout_template,
t6 => $t6;
# Cache page template
render-template
'tt',
template_name => 'content',
content => $page_contents,
t6 => $t6;
# Render layout
render-template
'tt',
context => %context,
template_name => 'layout',
t6 => $t6,
logger => &logger;
}
}
}
# Do not wrap non-html files with layout
default { $page_contents }
}
prepare-html-output(
:$page_name,
:$default_language,
:$language,
:$layout_contents,
:$no_livereload,
path => %page<path>,
target_dir => %page<target_dir>,
out_ext => %page<out_ext>)
==> write-generated-file(
build_dir => $build_dir);
} # end page_queue
};
}
our sub build(
Map $config,
::D :&logger = Uzu::Logger::start()
--> Promise
) {
my List $exts = $config<template_extensions>{$config<template_engine>};
# Capture page meta
# data for related,
# categories, and sitemaps
my %site_index;
# All available pages
my Any %pages = templates(:$exts, dir => $config<pages_dir>).map: -> $path {
next unless $path.IO.f;
my Str ($page_name, $out_ext, $target_dir) = extract-file-parts($path, $config<pages_dir>.IO.path);
# Extract header yaml if available
my ($page_html, %page_vars) = parse-template :$path, :&logger;
# Add to site index
%site_index{$page_name} = %page_vars;
%site_index{$page_name}<modified> = $path.modified;
%site_index{$page_name}<out_ext> = $out_ext;
my $pages_watch_dir = $config<pages_watch_dir>.IO.path;
%( $page_name => %{
path => $path,
html => $page_html,
vars => %page_vars,
out_ext => $out_ext,
target_dir => $target_dir,
modified => $path.modified,
render => so $path.IO.path ~~ /^ $pages_watch_dir /});
}
# All available partials
my Any %partials = build-partials-hash source => $config<partials_dir>, :$exts, :&logger;
for $config<themes> -> $theme_config {
my $theme_name = $theme_config.keys.head;
my %theme = $theme_config.values.head;
my $build_dir = %theme<build_dir>;
my $theme_dir = %theme<theme_dir>;
my $exclude_pages = %theme<exclude_pages>||[];
my Any %theme_partials =
$theme_dir.IO.child('partials').IO.d
?? build-partials-hash source => $theme_dir.IO.child('partials'), :$exts, :&logger !! %();
# Create build dir
if !$build_dir.IO.d {
logger "Create build directory";
mkdir $build_dir;
}
logger "Copy public, assets";
copy-dir($config<public_dir>, $build_dir) when $config<public_dir>.IO.e;
copy-dir($theme_dir.IO.child('assets'), $build_dir) when $theme_dir.IO.child('assets').IO.e;
# Append nested pages directories
my @template_dirs = |$config<template_dirs>, |find(dir => $config<pages_dir>, type => 'dir');
# Append nested i18n directories
my IO::Path @i18n_dirs = $config<i18n_dir>, |find(dir => $config<i18n_dir>, type => 'dir');
my IO::Path $layout_path = grep(/ 'layout.' @$exts $ /, templates(:$exts, dir => $theme_dir)).head;
# Extract layout header yaml if available
my ($layout_template, $layout_vars) =
$layout_path.defined
?? parse-template(path => $layout_path, :&logger)
!! ["", %{}];
logger "Theme [{$theme_name}] does not contain a layout template" unless $layout_path.defined;
my @exclude_pages = [ |$config<exclude_pages>, |$exclude_pages ].grep(*.defined);
# Queue for page renders
my $page_queue = Supplier.new;
my $page_supply = $page_queue.Supply;
my $rendered_pages = 0;
my Promise $render_complete .= new;
$page_supply.tap({ .() });
# One per language
for $config<language> -> $language {
logger "Compile templates [$language]";
i18n-from-yaml(
language => $language,
i18n_dir => $config<i18n_dir>,
logger => &logger)
==> render(
page_queue => $page_queue,
template_engine => $config<template_engine>,
build_dir => $build_dir,
theme => $theme_name,
layout_template => $layout_template,
layout_vars => $layout_vars,
layout_modified => ($layout_path.defined ?? $layout_path.modified !! 0),
theme_dir => $theme_dir,
default_language => $config<language>[0],
language => $language,
pages => %pages,
exclude_pages => @exclude_pages,
partials_all => %( |%partials, |%theme_partials ),
site_index => %site_index,
no_livereload => $config<no_livereload>,
logger => &logger);
}
}
logger "Compile complete";
}
our sub clear(
Map $config,
::D :&logger = Uzu::Logger::start()
) {
# Clear out build
for $config<themes> {
logger "Deleting build directory";
rm-dir .values.head<build_dir>;
}
}