#!/bin/bash
#
# cron.copy.today
# jms1 2024-06-25
#
# Copy my Obsidian Daily Note where others can see it
#
# https://jms1.info/obsidian/copy-daily.html
#
###############################################################################
#
# The MIT License (MIT)
#
# Copyright (C) 2024 John Simpson
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
#
###############################################################################

SRC_DIR="${HOME}/Documents/Obsidian/DAYJOB/Daily Notes"
DST_DIR="/keybase/team/KEYBASE_TEAM_NAME/jms1-today.md"

SUM_FILE="${0}.sum"

###############################################################################
###############################################################################
###############################################################################
#
# If KBFS isn't mounted, do nothing.

if [[ ! -d "$DST_DIR" ]]
then
    exit 1
fi

########################################
# Obsidian is configured with "Daily notes - Date format" `YYYY-MM-DD ddd`
# This `date` command generates the same exact name, so the script can find
# the correct file.

TODAY="$( date '+%Y-%m-%d %a' )"

########################################
# I add the current time into the file created by the script,
# so we can tell when it was copied.

NOW="$( date -u '+%Y-%m-%d %H:%M:%S %Z' )"

########################################
# If today's Daily Notes file doesn't exist, do nothing.

if [[ ! -f "$SRC_DIR/$TODAY.md" ]]
then
    exit 1
fi

########################################
# Figure out if the file in the shared drive needs to be copied or not.
# - If the checksum file exists
#   - and it contains today's filename
#     - and the checksum itself is correct, then do nothing.

if [[ -f "$SUM_FILE" ]]
then
    if grep -q "$TODAY.md" "$SUM_FILE"
    then
        if sha256sum --status -c "$SUM_FILE"
        then
            exit 0
        fi
    fi
fi

########################################
# Copy the file

(
    printf '# %s\ncopied `%s`\n\n' "$TODAY" "$NOW"
    cat "$SRC_DIR/$TODAY.md"
) > "$DST_DIR/today.md"

########################################
# Create/update checksum file for next time

sha256sum "$SRC_DIR/$TODAY.md" > "$SUM_FILE"