calendar.liquid

{% assign headBG = include.headBGColor | default: "#000" %}
{% assign headFG = include.headFGColor | default: "#fff" %}
{% assign grayDateBG = include.grayDateBGColor | default: "#eee" %}
{% assign grayDateFG = include.grayDateFGColor | default: "#888" %}
{% assign postDateBG = include.postDateBGColor | default: "#efe" %}
{% assign divWidth = include.width | default: "100%" %}

{% assign floatStyle = "" %}
{% if include.float %}
  {% assign floatStyle = "float:" | append: include.float | append: ";" %}
{% endif %}

{% assign lastPost = site.posts | last %}
{% assign aDateInMonth = include.date | default: lastPost.date | default: site.time | date: "%Y-%m-%d" %}

{% assign monthNumber = aDateInMonth | date: "%m" | plus: 0 %}
{% assign yearNumber = aDateInMonth | date: "%Y" | plus: 0 %}

{% assign lastDayInMonth = 31 %}{% assign lastDateInMonth = aDateInMonth | date: "%Y-%m-31" %}{% assign monthNumberTemp = lastDateInMonth | date: "%m" | plus:0 %}{% if monthNumber != monthNumberTemp %}
{% assign lastDayInMonth = 30 %}{% assign lastDateInMonth = aDateInMonth | date: "%Y-%m-30" %}{% assign monthNumberTemp = lastDateInMonth | date: "%m" | plus:0 %}{% if monthNumber != monthNumberTemp %}
{% assign lastDayInMonth = 29 %}{% assign lastDateInMonth = aDateInMonth | date: "%Y-%m-29" %}{% assign monthNumberTemp = lastDateInMonth | date: "%m" | plus:0 %}{% if monthNumber != monthNumberTemp %}
{% assign lastDayInMonth = 28 %}{% assign lastDateInMonth = aDateInMonth | date: "%Y-%m-28" %}{% assign monthNumberTemp = lastDateInMonth | date: "%m" | plus:0 %}{% if monthNumber != monthNumberTemp %}
{% endif %}{% endif %}{% endif %}{% endif %}
{% assign firstDateInMonth = aDateInMonth | date: "%Y-%m-01" %}

{% assign nextYearNumber = yearNumber %}
{% assign nextMonthNumber = monthNumber | modulo: 12 | plus: 1 %}{% if nextMonthNumber == 1 %}{% assign nextYearNumber = yearNumber | plus: 1 %}{% endif %}
{% assign firstDateInNextMonth = "" | append: nextYearNumber | append: "-" | append: nextMonthNumber | append: "-01" | date: "%Y-%m-%d" %}

{% assign prevYearNumber = yearNumber %}
{% assign prevMonthNumber = monthNumber | minus: 1 %}{% if prevMonthNumber == 0 %}{% assign prevMonthNumber = 12 %}{% assign prevYearNumber = yearNumber | minus: 1 %}{% endif %}
{% assign firstDateInPrevMonth = "" | append: prevYearNumber | append: "-" | append: prevMonthNumber | append: "-01" | date: "%Y-%m-%d" %}
{% assign lastDayInPrevMonth = 31 %}{% assign lastDateInPrevMonth = firstDateInPrevMonth | date: "%Y-%m-31" %}{% assign monthNumberTemp = lastDateInPrevMonth | date: "%m" | plus:0 %}{% if prevMonthNumber != monthNumberTemp %}
{% assign lastDayInPrevMonth = 30 %}{% assign lastDateInPrevMonth = firstDateInPrevMonth | date: "%Y-%m-30" %}{% assign monthNumberTemp = lastDateInPrevMonth | date: "%m" | plus:0 %}{% if prevMonthNumber != monthNumberTemp %}
{% assign lastDayInPrevMonth = 29 %}{% assign lastDateInPrevMonth = firstDateInPrevMonth | date: "%Y-%m-29" %}{% assign monthNumberTemp = lastDateInPrevMonth | date: "%m" | plus:0 %}{% if prevMonthNumber != monthNumberTemp %}
{% assign lastDayInPrevMonth = 28 %}{% assign lastDateInPrevMonth = firstDateInPrevMonth | date: "%Y-%m-28" %}{% assign monthNumberTemp = lastDateInPrevMonth | date: "%m" | plus:0 %}{% if prevMonthNumber != monthNumberTemp %}
{% endif %}{% endif %}{% endif %}{% endif %}

{% assign LAST_MONTH = lastDateInPrevMonth | date: "%Y-%m" %}
{% assign THIS_MONTH = aDateInMonth | date: "%Y-%m" %}
{% assign NEXT_MONTH = firstDateInNextMonth | date: "%Y-%m" %}
{% assign postsForCalendar = "" %}
{% if include.links or true %}
  {% for post in site.posts %}
    {% assign month = post.date | date: "%Y-%m" %}
    {% if month == LAST_MONTH or month == THIS_MONTH or month == NEXT_MONTH %}
      {% assign date = post.date | date: "%Y-%m-%d" %}
      {% assign postsForCalendar = postsForCalendar | append: date | append: "~" %}
      {% assign postsForCalendar = postsForCalendar | append: post.url | append: "~" %}
      {% assign postsForCalendar = postsForCalendar | append: post.title | append: "?" %}
    {% endif %}
  {% endfor %}
{% endif %}
{% assign postsForCalendar = postsForCalendar | split: "?" %}

{% assign firstDayOfWeek = firstDateInMonth | date: "%a" %}
{% case firstDayOfWeek %}
  {% when 'Sun' %}
    {% assign daysBeforeFirstDay = 0 %}
  {% when 'Mon' %}
    {% assign daysBeforeFirstDay = 1 %}
  {% when 'Tue' %}
    {% assign daysBeforeFirstDay = 2 %}
  {% when 'Wed' %}
    {% assign daysBeforeFirstDay = 3 %}
  {% when 'Thu' %}
    {% assign daysBeforeFirstDay = 4 %}
  {% when 'Fri' %}
    {% assign daysBeforeFirstDay = 5 %}
  {% when 'Sat' %}
    {% assign daysBeforeFirstDay = 6 %}
{% endcase %}

<div style='text-align:center; width:{{ divWidth }}; {{ floatStyle }}'>
<table border="1" cellspacing="0" cellpadding="0" style="width:100%">
  <tr style="background-color:{{ headBG }}; color:{{ headFG }};"><td colspan="7"><strong>{{ aDateInMonth | date: "%B %Y" }}</strong></td></tr>
  <tr><td>SUN</td><td>MON</td><td>TUE</td><td>WED</td><td>THU</td><td>FRI</td><td>SAT</td></tr>

{% if daysBeforeFirstDay > 0 %}
  {% assign dayNum = lastDateInPrevMonth | date: "%d" | minus: daysBeforeFirstDay | plus: 1 %}
  <tr>
  {% for i in (1..7) %}

    {% assign currentPostForCalendar = "" %}
    {% assign url = "" %}{% assign title = "" %}
    {% assign thisDate = THIS_MONTH %}
    {% if daysBeforeFirstDay > 0 %}{% assign thisDate = LAST_MONTH %}{% endif %}
    {% assign thisDate = thisDate | append: "-" | append: dayNum | date: "%Y-%m-%d" %}
    {% for post in postsForCalendar %}
      {% assign postDate = post | slice: 0, 10 %}
      {% if postDate == thisDate %}
        {% assign currentPostForCalendar = currentPostForCalendar | append: post | append: "?" %}
        {% assign url = post | split: "~" %}
        {% assign title = url[2] %}
        {% assign url = url[1] %}
      {% endif %}
    {% endfor %}

    {% if daysBeforeFirstDay > 0 %}
      {% if url != "" %}
        <td style="background-color:{{ grayDateBG }}; color:{{ grayDateFG }};"><a href="{{ url }}" title="{{ title }}">{{ dayNum }}</a></td>
      {% else %}
        <td style="background-color:{{ grayDateBG }}; color:{{ grayDateFG }};">{{ dayNum }}</td>
      {% endif %}
    {% else %}
      {% if url != ""  %}
        <td style="background-color:{{ postDateBG }};"><a href="{{ url }}" title="{{ title }}">{{ dayNum }}</a></td>
      {% else %}
        <td>{{ dayNum }}</td>
      {% endif %}
    {% endif %}
    {% assign daysBeforeFirstDay = daysBeforeFirstDay | minus: 1 %}
    {% if daysBeforeFirstDay == 0 %}{% assign dayNum = 1 %}{% else %}{% assign dayNum = dayNum | plus: 1 %}{% endif %}
  {% endfor %}
  </tr>

  {% assign dayNum2 = 1 %}
  {% for i in (1..5) %}
    <tr>
    {% for j in (1..7) %}

      {% assign currentPostForCalendar = "" %}
      {% assign url = "" %}{% assign title = "" %}
      {% assign thisDate = THIS_MONTH | append: "-" | append: dayNum %}
      {% if dayNum > lastDayInMonth %}{% assign thisDate = NEXT_MONTH | append: "-" | append: dayNum2 %}{% endif %}
      {% assign thisDate = thisDate | date: "%Y-%m-%d" %}
      {% for post in postsForCalendar %}
        {% assign postDate = post | slice: 0, 10 %}
        <!-- JOE: {{  postDate }} / {{ thisDate }} -->
        {% if postDate == thisDate %}
          {% assign currentPostForCalendar = currentPostForCalendar | append: post | append: "?" %}
          {% assign url = post | split: "~" %}
          {% assign title = url[2] %}
          {% assign url = url[1] %}
        {% endif %}
      {% endfor %}

      {% if dayNum > lastDayInMonth %}
        {% if url != ""  %}
          <td style="background-color:{{ grayDateBG }}; color:{{ grayDateFG }};"><a href="{{ url }}" title="{{ title }}">{{ dayNum2 }}</a></td>
        {% else %}
          <td style="background-color:{{ grayDateBG }}; color:{{ grayDateFG }};">{{ dayNum2 }}</td>
        {% endif %}
        {% assign dayNum2 = dayNum2 | plus: 1 %}
      {% else %}
        {% if url != ""  %}
          <td style="background-color:{{ postDateBG }};"><a href="{{ url }}" title="{{ title }}">{{ dayNum }}</a></td>
        {% else %}
          <td>{{ dayNum }}</td>
        {% endif %}
      {% endif %}
      {% assign dayNum = dayNum | plus: 1 %}
    {% endfor %}
    </tr>
    {% if dayNum > lastDayInMonth %}{% break %}{% endif %}
  {% endfor %}
{% endif %}

</table>
</div>