#!/usr/bin/env bash
#set -euo pipefail
# 
# This simple script will post the weather plots given at
# IMG[1-3] to a social media Account using the Mastodon API
# (at least I hope, that it's compatible to the Mastodon API
# because I use Mitra on my server).
# 
# The images must be generated by another script and have to be located
# in the same directory as the script.
# 
# ===================================================================================
# Change anything in the SECTION "EDIT THESE FOR YOUR NEEDS",  
# ===================================================================================
# 
# It works (for me) but is still under developement
# Improvements and changes may be done at any time
# mostly there is no check if any command and function
# is implemented on the machine,
# nor if they are being executed correctly.
# Use at your own risk.
# 
# ===================================================================================
# CONFIG — "EDIT THESE FOR YOUR NEEDS"
# ===================================================================================

BASE="https://INSTANCE.SOCIAL"
USER="YOUR_USER"
IMG1="YOUR_TEMERATURE_IMAGE_WITH_FILE_EXTENSION"
IMG2="YOUR_PRESSURE_IMAGE_WITH_FILE_EXTENSION"
IMG3="YOUR_HUMIDITY_IMAGE_WITH_FILE_EXTENSION"
VISIBILITY="YOUR_NEEDED_VISIBILITY"          # possible values: public / unlisted / private / direct
STATUS_TEXT="YOUR_STATUS_MESSAGE"
TOKEN="TOKEN_FROM_YOUR_FEDIVERSE_ACCOUNT"

# ===================================================================================
# END OF THE SECTION "EDIT THESE FOR YOUR NEEDS"
# ===================================================================================

upload_media() {
  local file="$1"
  local desc="$2"
  curl -s -H "Authorization: Bearer $TOKEN" -F "file=@${file}" -F "description=${desc}" "$BASE/api/v1/media"| jq -r '.id // .media_id // empty'
}

mid1=$(upload_media "$IMG1" "Temperature chart for $(date +%F)")
mid2=$(upload_media "$IMG2" "Pressure chart for $(date +%F)")
mid3=$(upload_media "$IMG3" "Humidity chart for $(date +%F)")

if [[ -z "$mid1" || -z "$mid2" || -z "$mid3" ]]; then
  echo "Upload failed; responses:"
  echo "IMG1:"
  curl -s -H "Authorization: Bearer $TOKEN" -F "file=@${IMG1}" "$BASE/api/v1/media" | jq .
  echo "IMG2:"
  curl -s -H "Authorization: Bearer $TOKEN" -F "file=@${IMG2}" "$BASE/api/v1/media" | jq .
  echo "IMG3:"
  curl -s -H "Authorization: Bearer $TOKEN" -F "file=@${IMG3}" "$BASE/api/v1/media" | jq .
  exit 1
fi

media_array=$(jq -nc --arg a "$mid1" --arg b "$mid2" --arg c "$mid3" '[ $a, $b, $c ]')
payload=$(jq -nc --arg status "$STATUS_TEXT" --argjson media_ids "$media_array" --arg vis "$VISIBILITY" \
  '{status: $status, media_ids: $media_ids, visibility: $vis}')

curl -s -H "Authorization: Bearer $TOKEN" -H "Content-Type: application/json" -d "$payload" "$BASE/api/v1/statuses" | jq .