#!/bin/bash

USER="$1"

REL_SOURCE_PATH="/$1/files/$2"
ABS_SOURCE_PATH="/var/lib/nextcloud/$1/files/$2"

REL_DEST_PATH="/$1/files/$3"
ABS_DEST_PATH="/var/lib/nextcloud/$1/files/$3"

REL_UNSORTABLE_PATH="/$1/files/$4"
ABS_UNSORTABLE_PATH="/var/lib/nextcloud/$1/files/$4"

echo "STARTING..."

chown -R www-data:www-data "$ABS_SOURCE_PATH"
chmod -R 770 "$ABS_SOURCE_PATH"

SCAN="FALSE"
IFS=$'\n'
for f in `find "$ABS_SOURCE_PATH" -iname *.PNG -o -iname *.JPG -o -iname *.JPEG -o -iname *.HEIC -o -iname *.CR2 -o -iname *.CR3 -o -iname *.MP4 -o -iname *.MOV`; do
  SCAN="TRUE"
  echo "PROCESSING: $f"

  EXIF=`exiftool "$f"`
  if grep -q '^Create Date' <<< $EXIF
  then
    DATETIME=`grep -m 1 "^Create Date" <<< $EXIF | cut -d: -f2- | xargs`
  elif grep -q '^File Modification Date' <<< $EXIF
  then
    DATETIME=`grep -m 1 '^File Modification Date' <<< $EXIF | cut -d: -f2- | xargs`
  else
    RELPATH=$(realpath --relative-to="$ABS_SOURCE_PATH" "$f")
    DIRNAME=$(dirname "$ABS_UNSORTABLE_PATH/$RELPATH")
    echo "UNSORTABLE: $f"
    mkdir -p "$DIRNAME"
    mv "$f" "$DIRNAME"
    continue
  fi

  DATE=`cut -d' ' -f1 <<< $DATETIME`
  TIME=`cut -d' ' -f2 <<< $DATETIME | cut -d'+' -f1`

  YEAR=`cut -d':' -f1 <<< $DATE`
  MONTH=`cut -d':' -f2 <<< $DATE`
  DAY=`cut -d':' -f3 <<< $DATE`
  HOUR=`cut -d':' -f1 <<< $TIME`
  MINUTE=`cut -d':' -f2 <<< $TIME`
  SECOND=`cut -d':' -f3 <<< $TIME`

  HASH=`sha256sum "$f" | xxd -r -p | base64 | head -c 3 | tr '/+' '_-'`
  EXT=`echo "${f##*.}" | tr '[:upper:]' '[:lower:]'`
  if [[ "$EXT" = "cr2" ]] ||  [[ "$EXT" = "cr3" ]]
  then
    RAW="raw/"
  else
    RAW=""
  fi
  FILE="$ABS_DEST_PATH/$YEAR-$MONTH/$RAW$YEAR$MONTH$DAY"-"$HOUR$MINUTE$SECOND"_"$HASH"."$EXT"
  echo "DESTINATION: $FILE"
  mkdir -p "$(dirname "$FILE")"
  mv -v "$f" "$FILE"
done

if [ "$SCAN" == "TRUE" ]; then
  echo "SCANNING..."
  # find "$ABS_SOURCE_PATH/"* -type d -empty -delete >> /var/echo/nc-picsort.echo # nextcloud app bug when deleting folders
  chown -R www-data:www-data "$ABS_DEST_PATH"
  chown -R www-data:www-data "$ABS_UNSORTABLE_PATH"
  chmod -R 770 "$ABS_DEST_PATH"
  chmod -R 770 "$ABS_UNSORTABLE_PATH"
  sudo -u www-data php /opt/nextcloud/occ files:scan --path "$REL_SOURCE_PATH"
  sudo -u www-data php /opt/nextcloud/occ files:scan --path "$REL_UNSORTABLE_PATH"
  sudo -u www-data php /opt/nextcloud/occ files:scan --path "$REL_DEST_PATH"
  sudo -u www-data php /opt/nextcloud/occ preview:pre-generate
fi

echo "FINISH."