#! /bin/bash
# Last edited on 2010-07-08 18:39:06 by stolfilocal
usage="$0 [-original] [-absentOK] [-iconHeight NN] TITLE"
# Creates an index page "index.html" or "index-orig.html" for computer
# graphics homework hand-ins. This version is specialized for still
# images.
#
# Reads files
#
# rausrs.txt : login names and RA numbers of all registered students
# aus.txt : RA numbers of absentees
# intro.html (if present) : blurb to be included in page, before results.
#
# Rejects input from absentee students, unless "-absentOK" is given.
# For each non-absentee student, expects to find files
#
# ${ra}/main.pov - Main POV-ray file (edited by instructor)
# ${ra}/main.png - GIF image.
#
# The above files are the versions that were edited and/or rebuilt
# by the teacher. The original version of file "{FOO}.{BAR}",
# as turned in by the student, is assumed to be "{FOO}-orig.{BAR}".
# However, the original image may have extension ".gif" or ".jpg"
# instead of ".png".
#
# If "-original" is given, makes an index "index-orig.html" for the
# "-orig" versions instead of the edited/rebuilt versions.
#
# The thumbnail version of file "{FOO}.{BAR}" or "{FOO}-orig.{BAR}"
# is created, if needed, with name "{FOO}-i.png" "{FOO}-orig-i.png".
export PATH=".:tools:../tools:../../tools:../../../tools:../../../../tools:${PATH}"
# Name suffixes and button labels for "hot" and alternate versions:
hotsuf=""; hottxt="novo"
altsuf="-orig"; alttxt="orig"
# Options for {process-absentees}:
absentopt=( )
# Default icon height (pixels):
iconHeight=60
# TRUE if the derived files should be rebuilt as needed:
rebuild=1
while [[ ( $# -gt 0 ) && ( "/${1:0:1}" == "/-" ) ]]; do
if [[ ( $# -ge 1 ) && ( "/$1" == "/-absentOK" ) ]]; then
absentopt=( "-absentOK" ); shift;
elif [[ ( $# -ge 1 ) && ( "/$1" == "/-original" ) ]]; then
hotsuf="-orig"; hottxt="orig";
altsuf=""; alttxt="novo";
rebuild=0; shift;
elif [[ ( $# -ge 2 ) && ( "/$1" == "/-iconHeight" ) ]]; then
iconHeight="$2"; shift; shift;
else
echo "bad option: $1" 1>&2;
echo "usage: ${usage}" 1>&2; exit 1
fi
done
if [[ $# != 1 ]]; then
echo "usage: ${usage}" 1>&2; exit 1
fi
title="$1"; shift;
rafile="rausrs.txt"
abfile="aus.txt"
hdrfile="intro.html"
htmfile="index${hotsuf}.html"
# Names of hot and alternate image files to be shown (minus extension):
imgname="main${hotsuf}"
altimgname="main${altsuf}"
# Remove files of absentees and provide "absent" picture for them:
if [[ -r ${abfile} ]]; then
process-absentees ${absentopt[@]} `cat ${abfile} | egrep -v '^ *([#]|$)'`
fi
# Save old version of index page
if [[ -s ${htmfile} ]]; then
/bin/mv ${htmfile} ${htmfile}~
fi
# Write index page header:
cat <<EOF >> ${htmfile}
<html>
<head>
<title>${title} (${hottxt})</title>
</head>
<body bgcolor="#cbcbcb">
<h1>${title} (${hottxt})</h1>
<h2><tt>[<a href="index${altsuf}.html">${alttxt}</a>></tt></h2>
EOF
# Copy preformatted prologue:
if [[ -r ${hdrfile} ]]; then
cat ${hdrfile} >> ${htmfile}
fi
# Get numbers of all registered students:
ras=( `cat ${rafile} | egrep -v '^ *([#]|$)' | gawk '//{print $2;}'` )
cat <<EOF >> ${htmfile}
<hr>
<table cellspacing=1 cellpadding=1 border=0>
EOF
# Number of icons in current row:
n=0
for ra in ${ras[@]} ; do
# Define, for student ${ra}:
#
# ${povfile} = file name of "hot" source file.
# ${altpovfile} = file name of alternate source file.
# ${imgfile} = file name of the full "hot" image.
# ${iconfile} = file name of the iconic version of the "hot" image.
# ${altimgfile} = file name of the alternate image.
#
# ${imgbutt} = the HTML fragment of the image button.
# ${altimgbutt} = the HTML fragment of the alternate image button.
# ${povbutt} = the HTML fragment of the source button.
echo "=== ${ra} ====================================" 1>&2
povfile="${ra}/main${hotsuf}.pov"
altpovfile="${ra}/main${altsuf}.pov"
if [[ ! ( -d ${ra} ) ]]; then
# non-existant directory:
echo "*** ${ra} missing or not directory" 1>&2
povbutt="[×]"
imgbutt="[×]"
altimgbutt="[×]"
imgfile="missing.png"
altimgfile="missing.png"
iconfile="missing-i.png"
elif [[ -r ${ra}/.absent ]]; then
# Absentee student:
povbutt="[×]"
imgbutt="[×]"
altimgbutt="[×]"
imgfile="absent.png"
altimgfile="absent.png"
iconfile="absent-i.png"
# Ckeck if the POV-ray source exists, just for safety:
if [[ -r ${povfile} ]]; then
echo "*** ${ra}/.absent and ${povfile} both present" 1>&2; exit 1
elif [[ -r ${altpovfile} ]]; then
echo "*** ${ra}/.absent and ${altpovfile} both present" 1>&2; exit 1
fi
else
# Ckeck whether the POV-ray source exists:
if [[ -r ${povfile} ]]; then
povbutt='[<a href="'"${povfile}"'">fonte</a>]'
else
povbutt="[×]"
fi
# Get file name ${imgfile} of the "hot" image:
if [[ ${rebuild} -ne 0 ]]; then
# The image name is fixed:
imgfile="${ra}/${imgname}.png"
# Delete it if empty:
if [[ -r ${imgfile} ]]; then
if [[ ! ( -s ${imgfile} ) ]]; then
echo "*** File ${imgfile} is empty, deleting it" 1>&2
/bin/rm -f ${imgfile}
fi
fi
# Try to rebuild it if needed:
if [[ -r ${povfile} ]]; then
# (Re)build image if necessary:
if [[ ! ( -s ${imgfile} ) ]]; then
echo "=== image ${imgfile} missing or empty, (re)building it ===" 1>&2
( cd ${ra} && make ${imgfile:t} ; echo " " )
echo "=== done rebuilding ${imgfile} ===========================" 1>&2
fi
else
echo "*** File ${povfile} is missing, can't rebuild ${imgfile}" 1>&2
fi
if [[ ! ( -s ${imgfile} ) ]]; then
echo "*** File ${imgfile} is unreadable, missing, or empty" 1>&2
imgfile="missing.png"
fi
else
# Look for existing image of some type, default "missing.png":
imgfile="missing.png"
for ext in png gif jpg ; do
imgcand="${ra}/${imgname}.${ext}"
# Delete candidate if empty:
if [[ -r "${imgcand}" ]]; then
if [[ ! ( -s ${imgcand} ) ]]; then
echo "*** File ${imgcand} is empty, deleting it" 1>&2
/bin/rm -f ${imgcand}
fi
fi
if [[ -s "${imgcand}" ]]; then
imgfile="${imgcand}"; break
fi
done
fi
# If image exists, then get its icon, else use "missing-i.png":
iconfile="${ra}/${imgname}-i.png"
if [[ "${imgfile}" != "missing.png" ]]; then
# Remove empty or outdated icon:
if [[ -r ${iconfile} ]]; then
if [[ ( ! ( -s ${iconfile} ) ) || ( ${imgfile} -nt ${iconfile} ) ]]; then
/bin/rm -f ${iconfile}
fi
fi
# Make sure that the corresponding icon does exist:
if [[ ! ( -s ${iconfile} ) ]]; then
echo "=== creating thumbnail image for ${imgfile} ===" 1>&2
convert ${imgfile} \
-geometry "x${iconHeight}" \
+profile '*' \
-colors 254 \
${iconfile}
fi
imgbutt='[<a href="'"${imgfile}"'">img</a>]'
else
# Remove the corresponding icon, if any
if [[ -r ${iconfile} ]]; then
/bin/rm -f ${iconfile}
fi
# Use the "missing" image icon:
iconfile="missing-i.png"
imgbutt="[×]"
fi
# Get alternate image file, if any:
altimgfile="missing.png"
for ext in png gif jpg ; do
altimgcand="${ra}/${altimgname}.${ext}"
# Delete candidate if empty:
if [[ -r "${altimgcand}" ]]; then
if [[ ! ( -s ${altimgcand} ) ]]; then
echo "*** File ${altimgcand} is empty, deleting it" 1>&2
/bin/rm -f ${altimgcand}
fi
fi
if [[ -s "${altimgcand}" ]]; then
altimgfile="${altimgcand}"; break
fi
done
if [[ ( -r ${altimgfile} ) && ( "${altimgfile}" != "missing.png" ) ]]; then
altimgbutt='[<a href="'"${altimgfile}"'">'"${alttxt}"'</a>]'
else
altimgbutt="[×]"
fi
fi
# Output the entry
if [[ ${n} -eq 0 ]]; then
echo " <tr>" >> ${htmfile}
fi
cat <<EOF >> ${htmfile}
<td nowrap> <a href="${imgfile}"><img src="${iconfile}"></a> <br><font size=+2><b>${ra}</b></font> <br>${povbutt} ${altimgbutt} <br> </td>
EOF
n=$(( ${n} + 1 ))
if [[ ${n} -ge 5 ]]; then
echo " </tr>" >> ${htmfile}
n=0
fi
done
# Write index page trailer
if [[ ${n} -gt 0 ]]; then
echo " </tr>" >> ${htmfile}
fi
cat <<EOF >> ${htmfile}
</table>
<hr>
</body>
</html>
EOF