#!/bin/bash --
#
# Shell script to query the Wikipedia.
#
# It can be used to output Wikipedia articles to the console, but can also 
# just open the article in any browser.
#
# Author: Christian Brabandt <cb@256bit.org>
# License: Public Domain

VERSION=0.05

set -e

function display_help(){
cat << EOF
NAME

    This script uses text-browser to query and render Wikipedia
    articles. The output will be printed to standard out.
    
SYNOPSIS
    `basename $0` [-BCnNoOpPsSuU] [-b prog] [-c patt] [-i patt] [-l lang] query
    `basename $0` -o [-b prog] [-l lang] query
    `basename $0` [-h]
    `basename $0` -v
   
    -n	do not colorize			    -N	simple colorization (alias -C)
    -p	display using a pager		    -P  don't use pager
    -o	open Wikipedia article in browser   -O	don't open in browser
    -s	display only a summary		    -S	display whole article
    -u	Just output the query URL	    -U	display article, not only url
    -v	display version			    -h	display help		   

    -i patt	colorize pattern (case insensitive)
    -I patt	colorize pattern (case-sensitive, alias -c)
    -b prog	use prog as browser (by default to invoke elinks, links2,
		links, lynx or w3m, if found)
    -l lang	use language (currently supported are: af, als, ca, cs, da, 
		de, en, eo, es, fi, fr, hu, ia, is, it, la, lb, nds, nl, nn,
		no, pl, pt, rm, ro, simple, sk, sl, sv, tr)

    Query can be any term to search for at Wikipedia. Special
    characters will be taken care of. Note that only one query term is
    supported, however this term can consist of one or more words.

    Configuration can also be controlled by creating a runcontrol file
    .`basename $0`rc your home directory.

    Note that when requesting to open the article in a browser, other
    parameters will be ignored. The same holds for the options -h and
    -v.
EOF
}

function getVersion(){
cat <<EOF
    $(basename "${0}") Version: ${VERSION}
EOF
}


function errorExit(){
    echo "$*" >&2
    exit 3
}

function colorize(){
if [ "${IGNCASE}" = "true" ]; then
    OUTPUT=$(echo -e "`cat`"|sed -s "s|\(${PATT}\)|\\\033\[0;31m\1\\\033\[0m|gi")
else
    OUTPUT=$(echo -e "`cat`"|sed -s "s|\(${PATT}\)|\\\033\[0;31m\1\\\033\[0m|g")
fi
echo -e "${OUTPUT}" 
}

function stripOutput(){
if [ "${LOCAL}" = "de" ]; then 
    MARKER='Diese Seite'
    MARKER2='Bearbeiten'
elif [ "${LOCAL}" = "en" -o "${LOCAL}" = "simple" ]; then
    MARKER='Views'
    MARKER2='edit'
elif [ "${LOCAL}" = "fr" ]; then
    MARKER='Affichages'
    MARKER2='modifier'
elif [ "${LOCAL}" = "nl" ]; then
    MARKER='Views'
    MARKER2='bewerk'
elif [ "${LOCAL}" = "sv" ]; then
    MARKER='Visningar'
    MARKER2='redigera'
elif [ "${LOCAL}" = "es" ]; then
    MARKER='Views'
    MARKER2='editar'
elif [ "${LOCAL}" = "pt" ]; then
    MARKER='Vistas'
    MARKER2='editar'
elif [ "${LOCAL}" = "pl" ]; then
    MARKER='Views'
    MARKER2='Edytuj'
elif [ "${LOCAL}" = "it" ]; then
    MARKER='Views'
    MARKER2='modifica'
elif [ "${LOCAL}" = "da" ]; then
    MARKER='Views'
    MARKER2='redigr\\|rediger'
elif [ "${LOCAL}" = "eo" ]; then
    MARKER='Vidoj'
    MARKER2='redaktu'
elif [ "${LOCAL}" = "no" ]; then
    MARKER='Visninger'
    MARKER2='rediger'
elif [ "${LOCAL}" = "nn" ]; then
    MARKER='Visningar'
    MARKER2='endre'
elif [ "${LOCAL}" = "fi" ]; then
    MARKER='Views'
    MARKER2='muokkaa'
elif [ "${LOCAL}" = "ca" ]; then
    MARKER='Views'
    MARKER2='edita'
elif [ "${LOCAL}" = "ro" ]; then
    MARKER='Vizualizari'
    MARKER2='modifica'
elif [ "${LOCAL}" = "cs" ]; then
    MARKER='Zobrazen'
    MARKER2='editovat'
elif [ "${LOCAL}" = "sk" ]; then
    MARKER='Zobrazen'
    MARKER2='prava'
elif [ "${LOCAL}" = "sl" ]; then
    MARKER='Ogledov'
    MARKER2='spremeni'
elif [ "${LOCAL}" = "lb" ]; then
    MARKER='Views'
    MARKER2='nneren'
elif [ "${LOCAL}" = "la" ]; then
    MARKER='Views'
    MARKER2='recensere'
elif [ "${LOCAL}" = "rm" ]; then
    MARKER='Views'
    MARKER2='edit'
elif [ "${LOCAL}" = "ia" ]; then
    MARKER='Views'
    MARKER2='modificar'
elif [ "${LOCAL}" = "is" ]; then
    MARKER='Views'
    MARKER2='breyta'
elif [ "${LOCAL}" = "hu" ]; then
    MARKER='Views'
    MARKER2='szerkeszts'
elif [ "${LOCAL}" = "tr" ]; then
    MARKER='Views'
    MARKER2='degistir'
elif [ "${LOCAL}" = "af" ]; then
    MARKER='Views'
    MARKER2='wysig'
elif [ "${LOCAL}" = "nds" ]; then
    MARKER='Views'
    MARKER2='nnern'
elif [ "${LOCAL}" = "als" ]; then
    MARKER='Views'
    MARKER2='ndere'
else
    MARKER='Views\\|References\\|Visible links'
fi

# Now comes the magic: Strip everything from Marker to end,
# cause this is only the linkdump

SED='sed -e "/${MARKER}/,$ D" -e "s|\\[[0-9]*\\]||g" -e "s|\\[IMG\\]||g"'
if [ -n "${MARKER2}" ]; then 
    echo "`cat`"| eval ${SED} -e '"s|\[${MARKER2}\]||g"'
else
    echo "`cat`"| eval ${SED}
fi
}

function openurl(){
    "${BROWSER}" "${URL}"
}

function summary(){
    if [ "${COLOR}" = "true" ]; then
	"${BROWSER}" -dump "${URL}" |grep -v copyright | head -n 22 \
	| tail -n 17  |stripOutput | colorize
    else
	"${BROWSER}" -dump "${URL}" |grep -v copyright | head -n 22 \
	| tail -n 17  | stripOutput
    fi
}

function getInfo(){
    LINES=$("${BROWSER}" -dump "${URL}" |wc -l)
    LINES=$(expr ${LINES} - 6)
    if [ "${COLOR}" = "false" ]; then
	"${BROWSER}" -dump "${URL}"| tail -n ${LINES}  |stripOutput  
    else
	"${BROWSER}" -dump "${URL}"| tail -n ${LINES}  |stripOutput |colorize 
    fi
}

# First read in the Run configuration File, if one is found 
if [ -r ~/.`basename $0`rc ]; then
    source ~/.`basename $0`rc
fi

# Process commandline parameters
while getopts "BCnNoOpPsSuUvhl:b:c:i:B:" ARGS 
    do
	case ${ARGS} in
	b) ABROWSER=${OPTARG} ;;
	B) ABROWSER='' ;;
	c) IGNCASE="false";COLOR="true"; PATT=${OPTARG} ;;
	C) COLOR="true" ;;
	i) IGNCASE="true";COLOR="true"; PATT=${OPTARG} ;;
	I) IGNCASE="false";COLOR="true"; PATT=${OPTARG} ;;
	l) LOCAL=${OPTARG} ;;
	n) COLOR="false" ;;
	N) COLOR="true" ;;
	o) USEBROWSER="true" ;;
	O) USEBROWSER="false" ;;
	p) PAGER="true" ;;
	P) PAGER="false" ;;
	s) SHORT="true" ;;
	S) SHORT="false" ;;
	u) OUTPUTURL="true" ;;
	U) OUTPUTURL="false" ;;
	v) getVersion; exit 0 ;;
	h) display_help; exit 0 ;;
	*) display_help; exit 1 ;;
	esac
done

shift `expr ${OPTIND} - 1`


# Setting Up some Variables, to determine, what actually to do
if [ -z "$1" ]; then
    display_help
    exit 1;
fi

IGNCASE=$(echo ${IGNCASE:="false"})

PAGER=$(echo ${PAGER:="false"})

if [ "$PAGER" = "true" ]; then
    { PAGER=$(which less) || PAGER=$(which more) ; } #|| errorExit "Kein Pager gefunden!" ;
fi
#fi

PAGER=$(echo ${PAGER/less/less -Rr})
COLOR=$(echo ${COLOR:="false"})


if [ "$COLOR" = "true" -a -z "${PATT}" ]; then
    PATT="$*"
fi

# Per default we use the german localized version of 
# Wikipedia
LOCAL=$(echo ${LOCAL:="en"})

# Check for Alternative Browser
if [ -n "${ABROWSER}" ]; then
    BROWSER=$(which "${ABROWSER}") ||  errorExit "${ABROWSER} nicht gefunden"  
else
   { BROWSER=$(which elinks) || 
     BROWSER=$(which links2) || 
     BROWSER=$(which lynx) || 
     BROWSER=$(which w3m) || 
     BROWSER=$(which links.main) || 
     BROWSER=$(which links) ; } || errorExit "kein Browser gefunden"
fi


# Open page in Browser?
USEBROWSER=$(echo ${USEBROWSER:="false"})

# Output only a summary?
SHORT=$(echo ${SHORT:="false"})

# Output only the URL?
OUTPUTURL=$(echo ${OUTPUTURL:="false"})

# Now translate the input into something, we can use for the Wikipedia
ARGUMENT="$(echo "$*" |sed -e 's||%C3%BC|g' -e 's||%C3%A4|g' -e 's||%C3%B6|g' -e 's|[[:space:]]|_|g' -e 's|\"||g' -e 's||%C3%9F|g')"
LOCAL="$(echo "${LOCAL}"|tr [:upper:] [:upper:])"
URL="http://${LOCAL}.wikipedia.org/wiki/${ARGUMENT}"

#errorExit "PAGER: $PAGER Browser: $BROWSER Local: $LOCAL COLOR: $COLOR PATT: $PATT IGNCASE: $IGNCASE"

# Depending on some Variables, we do some different things here
if [ "${USEBROWSER}" = "true" ]; then
    openurl 
    exit 0;
fi

if [ "${SHORT}" = "true" ]; then
    summary  
    exit 0;
fi

if [ "${OUTPUTURL}" = "true" ]; then
    if [ "${COLOR}" = "false" ]; then
	echo "${URL}" 
    else
	echo -e "\033[0;34m${URL}\033[0m" 
    fi
    exit 0;
fi

if [ "$PAGER" != "false" ]; then
    getInfo | eval ${PAGER}
else
    getInfo
fi
# vim: ft=sh