by aereal

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ςϯϓϨʔτͷ! ੩తղੳͱ! ϦϑΝΫλϦϯά! ! id:aereal

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ࣗݾ঺հ • id:aereal • aereal.org • Hatena • Web

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ΞδΣϯμ •Web ΞϓϦέʔγϣϯͱςϯϓϨʔτ Τϯδϯ •Text::Xslate ͱ੩తղੳ •՝୊ͱల๬

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ςϯϓϨʔτΤϯδϯ •Template::Toolkit •Text::MicroMason •HTML::Template • Text::Xslate

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Web ΞϓϦέʔγϣϯ ͱςϯϓϨʔτΤϯδϯ

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౤ߘΛදࣔ͢Δ! ૉ๿ͳςϯϓϨʔτ

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post.tt

[% post.title %]

[% post.body %]

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ίϯτϩʔϥ $c->render('post.tt', { post => $post });

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ʮ౤ߘΛҰཡදࣔ͠Α͏ʯ

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•ςϯϓϨʔτΛϞδϡʔϧԽ •post.tt → _post.tt •posts/index.tt → _post.tt •posts/show.tt → _post.tt

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ʮҰཡͰ͸ຊจΛ! লུ͍ͨ͠ʯ

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_post.tt [%- SET formatted = with_ellipsis ? (post.body | truncate) : post.body %]

[% post.title %]

[% formatted %]

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਺िؒޙ……

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index.tt [% INCLUDE "_post.tt" WITH with_ellipsis = 1, show_social_buttons = 1, ... ... show_category = 1, %]

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INCLUDE ͢Δͱ͖ʹ! ԿΛ౉ͤ͹Α͍ͷ͔! Θ͔Βͳ͍

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ʮίϝϯτʹॻ͜͏ʯ

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_post.tt [%# post, show_social_buttons, show_category, ... %] ...

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΍΍ॿ͔ͬͨ

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࣌͸ྲྀΕͨɺ͋Δ೔

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ίϝϯτ่յ •_post.tt Ͱ blog ͕ඞཁʹͳͬͨ •index.tt Ͱ͸ blog ͕ఆٛࡁΈͩͬͨ •_post.tt ʹίϝϯτ͕௥ه͞Εͳ͔ͬͨ

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_post.tt

...

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index.tt [%# blog %] ... [% FOR post IN posts %] [% INCLUDE "_post.tt" WITH blog = blog, ... %] [% END %]

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΋͏μϝͩ

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ͦΕ੩తղੳͰ

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ͳͥ੩తղੳ •نଇ͕͋ΔͷͰϓϩάϥϜͷಘҙ෼໺ •Text::Xslate ʹ͸Ϧονͳ API ͕͋Δ

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ొ৔ਓ෺ •Text::Xslate::Parser •(Text::Xslate::Syntax::*) •Text::Xslate::Symbol •Text::Xslate::AST::Walker ˑ

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Text::Xslate::Parser •࣮ࡍʹ࢖͏ͷ͸αϒΫϥε •e.g. Text::Xslate::Syntax::TTerse •Text::Xslate::Parser#parse •AST ͕ಘΒΕΔ •AST = [ Text::Xslate::Symbol ]

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T::X::Parser my $template = "my name is [% name %]"; my $parser = Text::Xslate::Syntax::TTerse->new; my $ast = $parser->parse($template);

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Text::Xslate::Symbol •#arity •ࣜͷछྨ(?) •e.g. print, literal

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Text::Xslate::Symbol •#id •ࣝผࢠ •e.g. name

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Text::Xslate::Symbol •#first #second •Φϖϥϯυ͕ฦΔ •#is_value ͳͲ

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ม਺Ͱ͋ΔτʔΫϯ grep { $_->arity eq 'variable' } @$ast

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΋͏ͪΐͬͱஸೡʹ •໦ߏ଄ͳͷͰ࠶ؼతʹ୳͞ͳ͍ͱ͍͚ͳ ͍ •#first #second

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Text::Xslate::AST::Walker https://github.com/aereal/Text-Xslate-AST-Walker

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ະఆٛͷม਺͕ͳ͍ ͜ͱΛظ଴͢ΔσϞ

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՝୊ •INCLUDE ͢Δ࣌ʹ౉͢ύϥϝʔλͷ໊લ΋ະ ఆٛʹݟ͑ͯ͠·͏ •અ͕୅ೖ (assign) ͩͬͨΒεΩοϓ͢Ε͹Α ͦ͞͏ •#traverse Έ͍ͨͳϝιουΛ࣮૷͍ͯ͠· ͢ •(inspired by Path::Class::Dir#traverse)

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ύϥϝʔλͷ໊લ [% INCLUDE "..." WITH post = post %] ~~~~

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՝୊ •ϦϑΝΫλϦϯά΋ࣗಈԽ͍ͨ͠ •→ ந৅తͰ͸ͳ͍ߏจ໦͕ཉ͍͠

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[% post.title %]

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[% post.title %]

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