HA - Create calendar events for all trash nights

populate_trash_nights.yaml

##############################################################
# All-Day Events for Food Waste Collection
# Collection every Wed from April 1 - Nov
# Collection every other Wed Nov- Apr (skipping first week in Nov)
#
# Designed to be run annually on Apr 1
#############################################################


alias: Set Food Waste Calendar Dates
sequence:
  - variables:
      date_list: >
        {%- set food_waste = namespace(dates=[]) %}
        {%- set year = today_at().year %}
        {%- set april = (year~"-04-01") | as_datetime | as_local%}
        {%- set first_wed = april + timedelta(days = 2 - april.weekday()) %}
        {%- for i in range(0, 33)%}
          {%- set food_waste.dates = food_waste.dates + 
          [first_wed + timedelta(days=7 * i)] %}
        {%- endfor %}
        {%- set food_waste.dates = food_waste.dates|reject('<', april)
        | reject('>', now().replace(month=10, day=31)) | list %}
        {%- set first_nov = food_waste.dates | last + timedelta(days=14) %}
        {%- for i in range(0, 13)%}
          {%- set food_waste.dates = food_waste.dates + 
          [first_nov + timedelta(days=14 * i)] %}
        {%- endfor %}
        {% set next_april = today_at().replace(month=4, 
        day=1, year= (year +1)) %}
        {{- food_waste.dates | reject('>', next_april) | map('string')
        | map('truncate', 14, False, '') | unique | list }}
  - repeat:
      for_each: "{{date_list}}"
      sequence:
        - service: calendar.create_event
          data:
            summary: Food Waste Collection Day
            start_date: "{{ repeat.item|string }}"
            end_date: >
              {% set new = repeat.item|string|as_datetime + timedelta(days=1) %}
              {{ new.date()|string }}
          target:
            entity_id: calendar.food_waste
        - delay: 1
mode: single
icon: mdi:calendar-edit-outline


########################################################################
# Event from 18:00-20:00 every Wednesday that does not have a trash holiday
# on Mon-Thurs of that week.
# Trash holidays on Mon, Tues, Wed, or Thursday move the event to Thursday.
#
# Designed to be run annually on Jan 1
########################################################################


alias: Calendar - Set Trash Nights
variables:
  date_list: >
    {%- set ns = namespace(trash_nights= [], week=[] ) %}
    {%- set holiday = label_entities('trash collection holidays')|expand %} 
    {%- for each in holiday %}
      {%- set date = each.state|as_datetime|as_local %}
      {%- set isoweekday = (date).isoweekday() %}
      {% If the holiday isn't on Fri, Sat, or Sun create a calendar event on Thursday for the trash collection %}
      {%- if isoweekday not in [5, 6, 7] %}
        {%- set day_offset = 4 - isoweekday %}
        {%- set ns.trash_nights = ns.trash_nights +
          [{"summary": "Trash Night",
          "description": "Offset due to " ~ each.attributes.friendly_name,
          "start_datetime": (date + timedelta(days=day_offset)).replace(hour=18).isoformat(),
          "end_datetime": (date + timedelta(days=day_offset)).replace(hour=20).isoformat() }] %}
        {# Add this event's week number to the list of weeks that now have events #}
        {%- set ns.week = ns.week + [date.isocalendar().week] %}
      {%- endif %}
    {% endfor %}

    {# Create a list of week numbers that still need an event #}
    {%- set last = now().replace(month=12,day=31).isocalendar().week + 1 %}
    {%- set week_range = (range(1,last))|list|reject('in', ns.week)|list %} 
    {%- set d = today_at().replace(day=1, month=1) %} 
    {%- set first = d + timedelta(days = 2 - d.weekday() ) %}
    
    {# Create a calendar event for each week in the previously genereated list of weeks that still need an event #}
    {%- for i in week_range %}
      {%- set date = first + timedelta(days = 7 * (i)) %}
      {%- set ns.trash_nights = ns.trash_nights + [
      {"summary": "Trash Night",
      "description": "",
      "start_datetime": date.replace(hour=18).isoformat(),
      "end_datetime": date.replace(hour=20).isoformat() }] %} 
    {%- endfor %}  {{ ns.trash_nights }}
sequence:
  - repeat:
      for_each: "{{date_list}}"
      sequence:
        - service: calendar.create_event
          data:
            summary: "{{ repeat.item.summary }}"
            description: "{{ repeat.item.description }}"
            start_date_time: "{{ repeat.item.start_datetime }}"
            end_date_time: "{{ repeat.item.end_datetime }}"
          target:
            entity_id: calendar.trash_nights
        - delay: 2
mode: single
icon: mdi:calendar-edit-outline