From a037056663c3ac910742d4f53834bae9a283f222 Mon Sep 17 00:00:00 2001
From: jeffreytse <jeffreytse.mail@gmail.com>
Date: Mon, 11 Jan 2021 18:33:35 +0800
Subject: [PATCH] feat: add some article-related functions

These functions include get_article_excerpt and get_article_words.
---
 _includes/functions/get_article_excerpt.html | 35 ++++++++++++++++++++
 _includes/functions/get_article_words.html   | 26 +++++++++++++++
 2 files changed, 61 insertions(+)
 create mode 100644 _includes/functions/get_article_excerpt.html
 create mode 100644 _includes/functions/get_article_words.html

diff --git a/_includes/functions/get_article_excerpt.html b/_includes/functions/get_article_excerpt.html
new file mode 100644
index 0000000..da1f914
--- /dev/null
+++ b/_includes/functions/get_article_excerpt.html
@@ -0,0 +1,35 @@
+{% if include.params.article %}
+  {% assign article = include.params.article %}
+{% endif %}
+
+{% if include.params.lang %}
+  {% assign lang = include.params.lang %}
+{% else %}
+  {% assign lang = lang | default: site.lang | default: "en" %}
+{% endif %}
+
+{% if include.params.excerpt_size %}
+  {% assign excerpt_size = include.params.excerpt_size %}
+{% else %}
+  {% assign excerpt_size = excerpt_size | default: 800 %}
+{% endif %}
+
+{%- include functions.html func='get_article_words' -%}
+{% assign words = return %}
+
+{% assign _article = article | strip_html %}
+{% assign _words = _article | size %}
+
+{% if lang != "en" %}
+  {% assign _size = words
+    | times: 1.0
+    | divided_by: _words
+    | times: excerpt_size
+    | round %}
+{% endif %}
+
+{% if _size > excerpt_size %}
+  {% assign _size = excerpt_size %}
+{% endif %}
+
+{% assign return = _article | truncate: _size %}
diff --git a/_includes/functions/get_article_words.html b/_includes/functions/get_article_words.html
new file mode 100644
index 0000000..69db9c6
--- /dev/null
+++ b/_includes/functions/get_article_words.html
@@ -0,0 +1,26 @@
+{% if include.params.article %}
+  {% assign article = include.params.article %}
+{% endif %}
+
+{% if include.params.lang %}
+  {% assign lang = include.params.lang %}
+{% else %}
+  {% assign lang = lang | default: site.lang | default: "en" %}
+{% endif %}
+
+{% assign words = article | number_of_words %}
+
+{% if lang != "en" %}
+  {% assign words = words
+    | times: 0.6
+    | round %}
+  {% assign words = article
+    | strip_html
+    | strip_newlines
+    | size
+    | times: 0.4
+    | plus: words
+    | round %}
+{% endif %}
+
+{% assign return = words %}