Enhanced the related posts.
If the number of related posts is less than 3, use the latest posts to supplement.
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1 changed files with 72 additions and 35 deletions
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<!--
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The related posts of current post.
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Placed in the bottom of every single post.
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Recommend the other 3 posts according to the tags and categories of the current post,
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if the number is not enough, use the other latest posts to supplement.
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v2.0
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https://github.com/cotes2020/jekyll-theme-chirpy
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© 2019 Cotes Chung
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Published under the MIT License
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-->
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{% assign MAX_SIZE = 3 %}
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<!-- The total size of related posts -->
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{% assign TOTAL_SIZE = 3 %}
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<!-- An random integer that bigger than 0 -->
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{% assign TAG_SCORE = 1 %}
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<!-- Equals to TAG_SCORE / {max_categories_hierarchy} -->
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{% assign CATEGORY_SCORE = 0.5 %}
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{% assign SEPARATOR = ":" %}
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{% assign score_list = "" | split: "" %}
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{% assign post_index = 0 %}
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{% assign last_index = site.posts.size | minus: 1 %}
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{% for post in site.posts %}
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{% if post.url != page.url %}
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{% assign score = 0 %}
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{% for tag in post.tags %}
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{% if page.tags contains tag %}
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{% assign score = score | plus: TAG_SCORE %}
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{% endif %}
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{% endfor %}
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{% for category in post.categories %}
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{% if page.categories contains category %}
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{% assign score = score | plus: CATEGORY_SCORE %}
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{% endif %}
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{% endfor %}
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{% if score > 0 %}
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{% capture score_item %}{{ score }}:{{ post_index }}{% endcapture %}
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{% assign score_list = score_list | push: score_item %}
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{% endif %}
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{% for i in (0..last_index) %}
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{% assign post = site.posts[i] %}
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{% if post.url == page.url %}
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{% continue %}
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{% endif %}
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{% assign post_index = post_index | plus: 1 %}
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{% assign score = 0 %}
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{% for tag in post.tags %}
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{% if page.tags contains tag %}
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{% assign score = score | plus: TAG_SCORE %}
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{% endif %}
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{% endfor %}
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{% for category in post.categories %}
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{% if page.categories contains category %}
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{% assign score = score | plus: CATEGORY_SCORE %}
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{% endif %}
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{% endfor %}
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{% if score > 0 %}
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{% capture score_item %}{{ score }}{{ SEPARATOR }}{{ i }}{% endcapture %}
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{% assign score_list = score_list | push: score_item %}
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{% endif %}
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{% endfor %}
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{% assign index_list = "" | split: "" %}
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{% if score_list.size > 0 %}
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{% assign score_list = score_list | sort | reverse %}
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{% assign count = 0 %}
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{% for entry in score_list limit: TOTAL_SIZE %}
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{% assign index = entry | split: SEPARATOR | last %}
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{% assign index_list = index_list | push: index %}
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{% endfor %}
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{% endif %}
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<!-- Fill with the other newlest posts -->
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{% assign less = TOTAL_SIZE | minus: index_list.size %}
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{% if less > 0 %}
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{% for i in (0..last_index) %}
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{% assign post = site.posts[i] %}
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{% if post.url != page.url %}
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{% capture cur_index %}{{ i }}{% endcapture %}
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{% unless index_list contains cur_index %}
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{% assign index_list = index_list | push: cur_index %}
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{% assign less = less | minus: 1 %}
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{% if less <= 0 %}
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{% break %}
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{% endif %}
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{% endunless %}
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{% endif %}
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{% endfor %}
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{% endif %}
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{% if index_list.size > 0 %}
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<div id="related-posts" class="mt-4 mb-2 mb-sm-4 pb-2">
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<h3 class="pt-2 mt-1 mb-4 ml-1" data-toc-skip>{{ site.data.label.post.relate_posts }}</h3>
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<div class="card-deck mb-4">
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{% for score_item in score_list %}
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{% assign data = score_item | split: ":" %}
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{% assign index = data[1] | plus: 0 %}
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{% for entry in index_list %}
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{% assign index = entry | plus: 0 %}
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{% assign post = site.posts[index] %}
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<div class="card">
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<a href="{{ post.url | relative_url }}">
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@ -65,11 +106,7 @@
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</div>
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</a>
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</div>
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{% assign count = count | plus: 1 %}
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{% if count >= MAX_SIZE %}
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{% break %}
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{% endif %}
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{% endfor %}
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</div> <!-- .card-deck -->
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</div>
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{% endif %}
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</div> <!-- #related-posts -->
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{% endif %}
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