Add next agenda to terminal

gistfile1.txt

Add this line to the crontab to cache the agenda every 10 minutes

*/10  *  *   *   *    OUT=$(/usr/bin/gcalcli --tsv --nostarted agenda "`date`") && echo "$OUT" > $HOME/.gcalcli-agenda-cache

This is part of my tmux config to include it:

tmux_conf_theme_status_left='   #($HOME/bin/next_agenda.sh) | #{prefix}#{pairing}#{synchronized}'
tmux_conf_theme_status_right='#{?battery_status, #{battery_status},}#{?battery_bar, #{battery_bar},}#{?battery_percentage, #{battery_percentage},} | #{username}#{root} | #{hostname} |'

set -g status-interval 10

next_agenda.sh

#!/bin/bash

function rel_fmt_low_precision() {
    local SEC_PER_MINUTE=$((60))
    local   SEC_PER_HOUR=$((60*60))
    local    SEC_PER_DAY=$((60*60*24))
    local  SEC_PER_MONTH=$((60*60*24*30))
    local   SEC_PER_YEAR=$((60*60*24*365))

    local last_unix="$(date --date="$*" +%s)"    # convert date to unix timestamp
    local now_unix="$(date +'%s')"

    local delta_s=$(( now_unix - last_unix ))

    if(( delta_s > 0))
    then
      if (( delta_s <  SEC_PER_MINUTE * 2))
      then
          echo ""$((delta_s))" seconds ago"
          return 
      elif (( delta_s <  SEC_PER_HOUR * 2))
      then
          echo ""$((delta_s / SEC_PER_MINUTE))" minutes ago"
          return 
      elif (( delta_s <  SEC_PER_DAY * 2))
      then
          echo ""$((delta_s / SEC_PER_HOUR))" hours ago"
          return 
      elif (( delta_s <  SEC_PER_MONTH * 2))
      then
          echo ""$((delta_s / SEC_PER_DAY))" days ago"
          return 
      elif (( delta_s <  SEC_PER_YEAR * 2))
      then
          echo ""$((delta_s / SEC_PER_MONTH))" months ago"
          return 
      else
          echo ""$((delta_s / SEC_PER_YEAR))" years ago"
          return 
      fi
    else
      if (( delta_s >  SEC_PER_MINUTE * -2))
      then
          echo "in "$((-1 * delta_s))" seconds"
          return 
      elif (( delta_s >  SEC_PER_HOUR * -2))
      then
          echo "in "$((-1 * delta_s / SEC_PER_MINUTE))" minutes"
          return 
      elif (( delta_s >  SEC_PER_DAY * -2))
      then
          echo "in "$((-1 * delta_s / SEC_PER_HOUR))" hours"
          return 
      elif (( delta_s >  SEC_PER_MONTH * -2))
      then
          echo "in "$((-1 * delta_s / SEC_PER_DAY))" days"
          return 
      elif (( delta_s >  SEC_PER_YEAR * -2))
      then
          echo "in "$((-1 * delta_s / SEC_PER_MONTH))" months"
          return 
      else
          echo "in "$((-1 * delta_s / SEC_PER_YEAR))" years"
          return 
      fi
    fi
}

NOW=$(date +%s)
next_agenda() {
    while read -r line; do
        read -d "\t" T1 T2 EVENT <<< $line
        DATE=$(date -d "$T1 $T2" +%s)
        if [ $DATE -ge $NOW ];
        then
            echo $(rel_fmt_low_precision "$T1 $T2") $EVENT
            break
        fi
    done <<< "$((cat ~/.gcalcli-agenda-cache || gcalcli --cache --tsv --nostarted agenda '`date`' '11:59pm') | cut -d$'\t' -f1,2,5-)"
}

next_agenda