#!/bin/bash
# a twitter client (uses .netrc for auth)

confdir=~/.bt
seenfile=$confdir/seen
feedstyle=$confdir/btfeed.xsl

if [ "$1" == "-h" ]; then
 echo " use: $(basename $0) -h | [ tweet ]"
 echo "      -h help"
 echo "      -i install"
 echo "      no arguments gets latest updates"
 exit
fi

function binstall {
 local sheet='<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>

<xsl:template match="/">
<xsl:apply-templates select="//status"/>
</xsl:template>

<xsl:template match="status">
<xsl:value-of select="id"/><xsl:text>: &lt;</xsl:text><xsl:value-of select="user/screen_name"/><xsl:text>&gt; </xsl:text>
    <xsl:value-of select="text"/><xsl:text>\n

</xsl:text>
</xsl:template>
</xsl:stylesheet>
'
 if [ ! -d $confdir ]; then mkdir -p $confdir; fi
 if [ ! -e $seenfile ]; then touch $seenfile; fi
 if [ ! -e $feedstyle ]; then
   echo -e $sheet > $feedstyle
 fi
}

function friends { 
 local tnow=$( date --utc +%s )
 local tthen=$( date --utc --reference=$seenfile +%s )
 if [ $(( tnow - tthen < 60 )) = 1 ]; then
   return
 fi
 local tmpfile=$( mktemp $confdir/result.XXXXXXXX )
 curl --connect-timeout 5 -s -n $1 | xsltproc --novalid $feedstyle - > $tmpfile
 local tmpu=$( mktemp ~/.bt/uniques.XXXXXXXX )
 cat $seenfile $tmpfile | sort -n | uniq -u > $tmpu
 cat $seenfile $tmpfile | sort -n | uniq > $seenfile
 cat $tmpu $tmpfile | sort -n | uniq -d | cut -d':' -f2-
 echo
 rm $tmpfile $tmpu 
 touch $seenfile
}

function update {
 curl -s -n -d "status=$msg" $1 &>/dev/null || echo "tweet broke"
}


if [ "$1" == "-i" ]; then
 binstall
 exit
fi

if [ -t 0 ]; then msg="$*"; else msg="$(cat -)"; fi

if [ "$msg" ];then
 update http://twitter.com/statuses/update.xml
else
 friends http://twitter.com/statuses/friends_timeline.xml
fi