#!/bin/bash
# 4chan-timestamp-search.sh
# Produces list of search query URLs from internal Unix timestamp filename used by 4chan and it's archives.
# Each query returns all archived posts with images posted in the exact second as target file.
#
# Usage:
# $ . 4chan-timestamp-search.sh 1570975531526
# $ . 4chan-timestamp-search.sh /home/user/path/1570975531526.jpg 
# $ . 4chan-timestamp-search.sh https://example.com/1570975531526s.jpg
#
# 4chan filename timestamp is Unix time in milliseconds.
#
# References:
# https://en.wikipedia.org/wiki/Unix_time
# https://en.wikipedia.org/wiki/ISO_8601
# https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
#[ TZ=US/Eastern ] and [ TZ=America/New_York ] timezones are interchangeable
#
# Valid time formats for FoolFuuka archives:
# 2019-10-13T14:05:31+04:00
# 2019-10-13 14:05:31+04:00
# 2019-10-13T10:05:31
# 2019-10-13 10:05:31
#
# Offset can be anything:
# 2019-10-13 15:05:31+05:00
#
# Passing time zones does something
# https://desuarchive.org/r9k/search/start/2019-11-03 01:00:00 EST/order/asc
# https://desuarchive.org/r9k/search/start/2019-11-03 01:00:00 EDT/order/asc
#
for FILE_PATH in "$@";do
	FILENAME=$(basename "$FILE_PATH")
	#
	# strip extension
	# 1570975531526.jpg > 1570975531526
	# 1570975531526s.jpg > 1570975531526s
	#
	EXTENSION_STRIP="${FILENAME%%.*}"
	#
	# handle thumbnail names
	# 1570975531526s > 1570975531526
	#
	CHAN4_TS="${EXTENSION_STRIP%%s*}"
	UNIX_TS="$(("$CHAN4_TS"/1000))"
	POST_TIME_UTC="$(date --utc --date @"$UNIX_TS" +'%Y-%m-%dT%H:%M:%S %Z')"
	POST_TIME="$(TZ=America/New_York date --date @"$UNIX_TS" +'%Y-%m-%dT%H:%M:%S')"
	POST_TIME_TZ="$(TZ=America/New_York date --date @"$UNIX_TS" +'%Y-%m-%dT%H:%M:%S %Z')"
	echo "			File: "$FILENAME""
	echo "Universal time: "$POST_TIME_UTC""
	echo "    4chan time: "$POST_TIME_TZ""
	echo "https://desuarchive.org/_/search/filter/text/start/"$POST_TIME"/end/"$POST_TIME"/order/asc"
	echo "https://thebarchive.com/_/search/filter/text/start/"$POST_TIME"/end/"$POST_TIME"/order/asc"
	echo "https://archived.moe/_/search/filter/text/start/"$POST_TIME"/end/"$POST_TIME"/order/asc"
	echo "https://archive.4plebs.org/_/search/filter/text/start/"$POST_TIME"/end/"$POST_TIME"/order/asc"
	echo "https://archiveofsins.com/_/search/filter/text/start/"$POST_TIME"/end/"$POST_TIME"/order/asc"
	echo "https://archive.palanq.win/_/search/filter/text/start/"$POST_TIME"/end/"$POST_TIME"/order/asc"
	echo "https://boards.fireden.net/_/search/filter/text/start/"$POST_TIME"/end/"$POST_TIME"/order/asc"
	# Text-only archive (2004 - 2014)
	echo "https://old.sage.moe/_/search/filter/text/start/"$POST_TIME"/end/"$POST_TIME"/order/asc"
	# search is disabled on some b4k boards
	echo "https://arch.b4k.co/_/search/filter/text/start/"$POST_TIME"/end/"$POST_TIME"/order/asc"
	# date searches don't work at all
	# echo "https://archive.alice.al/_/search/filter/text/start/"$POST_TIME"/end/"$POST_TIME"/order/asc"
	# 4plebs errors and asks to narrow search when quering all boards with /_/
	BOARDS_4PLEBS=("adv" "hr" "o" "pol" "s4s" "sp" "tg" "trv" "tv" "x" "f")
	for BOARD in "${BOARDS_4PLEBS[@]}";do
		echo "https://archive.4plebs.org/"$BOARD"/search/filter/text/start/"$POST_TIME"/end/"$POST_TIME"/order/asc"
	done
	###################################################################################
	# Warosu only searches one board by design                                        #
	# So far I couldn't find ways to make it search anything narrower than than 1 day #
	# Each post has Unix timestamp embedded as span title attribute (tooltip):        #
	# <span class="posttime" title="1695473800000"> Sat Sep 23 12:56:40 2023 </span>  #
	###################################################################################
	POST_DAY="$(TZ=US/Eastern date --date @"$UNIX_TS" +'%Y-%m-%d')"
	NEXT_DAY="$(TZ=US/Eastern date --date "$POST_DAY + 1 day" +'%Y-%m-%d')"
	echo ""
	echo "    	Post day: [$POST_DAY]"
	echo "    	Next day: [$NEXT_DAY]"
	BOARDS_WAROSU=("3" "biz" "cgl" "ck" "diy" "fa" "ic" "jp" "lit" "sci" "vr" "vt")
	for BOARD in "${BOARDS_WAROSU[@]}";do
		echo "https://warosu.org/"$BOARD"/?task=search2&search_datefrom="$POST_DAY"&search_dateto="$NEXT_DAY""
	done
	echo ""
done