Skyss travel planner [Bash style]

skyss.sh

#!/bin/bash
# 
# By: Alexander Karlstad <alexanderkarlstad@gmail.com>
#
# Requires 'jq' and 'curl'
#
# To install (on Ubuntu):
#  sudo apt install jq curl

function halp() {
  echo "Usage: $0 <from> <to> [time]"
  echo
  echo " From: tab completion suggests stop names"
  echo " To: tab completion suggests stop names"
  echo " Time: Some pre-defined terms in tab completion. Supports whatever the 'date' command's --date argument allows"
}

api_base=https://api.skyss.no/ws/mobile
api_auth="mobile:g7pEtkRF@"

from=$1
to=$2
time=$3

if [ -z "$1" -o -z "$2" ]; then
  halp
  exit 1
fi

if [ -z "$3" ]; then 
  time="+5 minutes"
fi

echo "Reise fra $from til $to, klokken `date +%H:%M -d "$time"`"
echo

from_json=`curl -G -s -u "${api_auth}" ${api_base}/places/ --data-urlencode "q=$1" | jq ".places[] | select(.type != \"street\" and .Description == \"$1\")"`
to_json=`curl -G -s -u "${api_auth}" ${api_base}/places/ --data-urlencode "q=$2" | jq ".places[] | select(.type != \"street\" and .Description == \"$2\")"`

from_id=`echo $from_json | jq -r .Identifier`
to_id=`echo $to_json | jq -r .Identifier`
from_gps=`echo $from_json | jq -r .Location`
to_gps=`echo $to_json | jq -r .Location`
timestamp=`date +%Y-%m-%dT%H:%M:%S%:z -d "$time"`

results=`curl -G -s -u "${api_auth}" ${api_base}/travelplans --data-urlencode "FromLocation=${from_gps}" --data-urlencode "ToLocation=${to_gps}" --data-urlencode "TS=${timestamp}" --data-urlencode "TimeType=Departure" --data-urlencode "FromStopGroupID=${from_id}" --data-urlencode "ToStopGroupID=${to_id}"`

plans=`echo $results | jq .TravelPlans`
plans_n=`echo $plans | jq ". | length"`

j=0
while [ "$j" -lt "$plans_n" ]; do
  plan=`echo "$results" | jq ".TravelPlans[${j}]"`
  steps_n=`echo "$plan" | jq ".TravelSteps | length"`
  plan_start=`echo $plan | jq -r .StartTime`
  plan_end=`echo $plan | jq -r .EndTime`

  echo "Start `date +%H:%M -d "${plan_start}"`, slutt `date +%H:%M -d "${plan_end}"`"

  i=0
  while [ "$i" -lt "$steps_n" ]; do
    step=`echo $plan | jq .TravelSteps[$i]`

    if [ $i = $((steps_n-1)) ]; then
      step_next=$to
    else
      step_next=`echo $plan | jq -r .TravelSteps[$((i+1))].Stop.Description`
    fi

    type=`echo $step | jq -r .Type`
    duration=`echo $step | jq -r .Duration | sed 's/PT\([0-9]\+\)H\([0-9]\+\)M/\1t\2m/' | sed 's/PT\([0-9]\+\)M/\1m/'`
    this=`echo $step | jq -r .Stop.Description`
    mode=`echo $step | jq -r .RouteDirection.ServiceMode`
    mode=${mode,,}
    mode=${mode//bus/buss}
    mode=${mode//light rail/bybane}
    mode_nr=`echo $step | jq -r .RouteDirection.PublicIdentifier`
    mode_dir=`echo $step | jq -r .RouteDirection.DirectionName`
    step_time=`date +%H:%M -d $(echo $step | jq -r .StartTime)`

    if [ "$type" = "walk" ]; then
      echo "[${step_time}] Gå fra ${this} til ${step_next} (${duration})"
    fi
    if [ "$type" = "route" ]; then
      echo "[${step_time}] Gå på ${mode} ${mode_nr} ${mode_dir} og sitt på til ${step_next} (${duration})"
    fi

    let i=i+1
  done

  let j=j+1
  echo
done

skyss.sh.bash_completion

_have skyss.sh && _skyss_complete() {
  local cur=${COMP_WORDS[COMP_CWORD]}
  local IFS=$'\n'

  case $COMP_CWORD in
    1|2)
      cur_s=${cur//\\ /%20}
      api_base="https://api.skyss.no/ws/mobile"
      stops=`curl -s -u 'mobile:g7pEtkRF@' $api_base/places/?q=${cur_s} | jq '.places[] | select(.type != "street") | .Description'`
      COMPREPLY=($(compgen -W "${stops}" -- $cur))
      ;;
    3)
      times="now\n+10 minutes\n+15 minutes\n-5 minutes\n-10 minutes\n-15 minutes\n+30 minutes\n-30 minutes"
      COMPREPLY=($(compgen -W "$(echo -e $times)" -- $cur))
      ;;
  esac
} && complete -o filenames -F _skyss_complete skyss.sh