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authorB Stack <bgstack15@gmail.com>2021-02-01 09:07:23 -0500
committerB Stack <bgstack15@gmail.com>2021-02-01 09:07:23 -0500
commita4481dc007ff202882b783ed4b36e03a8b4c1d05 (patch)
tree0f8b5ccb6ea5e966e8d517b07936479ef49b3516 /edit.cgi
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+#!/bin/sh
+# File: /mnt/public/www/cgi-bin/gallery/edit.cgi
+# Author: bgstack15@gmail.com
+# Startdate: 2021-01-24
+# SPDX-License-Identifier: GPL-3.0
+# Title: Edit gallery item
+# Package: gallery
+# Purpose: edit media title and description from webpage
+# History:
+# Usage: called by the links generated by the custom theme for sigal
+# Reference:
+# https://tutorial.eyehunts.com/html/html-textarea-input-placeholder-value-resize-readonly/
+# Improve:
+# Documentation:
+# needed parameters include id, image, and index.
+# Dependencies:
+# /etc/gallery-cgi.conf
+# sigal.conf.py from indicated gallery_id
+# apply.cgi
+# Reverse dependencies:
+# custom sigal theme that links to this when editing is enabled
+# apply.cgi
+DEBUG=0
+response=0
+export apply_link="apply.cgi" # web path to apply.cgi. Relative or absolute.
+export show_image=1 # if 0, then show no image at all
+export show_thumbnail=1 # if 1 then use thumbnail instead of full image
+test -e /etc/gallery-cgi.conf && . /etc/gallery-cgi.conf
+printf "%s\n\n" "Content-type: text/html"
+echo "<html><head><title>Edit metadata</title>"
+echo "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">"
+echo "</head><body>"
+echo "<pre>"
+test -n "${DEBUG}" && test ${DEBUG} -ge 3 1>/dev/null 2>&1 && {
+ env
+}
+
+# image is the image whose .md file needs
+echo "${QUERY_STRING}" | grep -qE "(^|\&|\?)image=[^\&]+" && {
+ export image="$( echo "${QUERY_STRING}" | grep -oE "(^|\&|\?)image=[^\&]+" | awk -F'=' '{$1="";print;}' | sed -r -e 's:^ ::' )"
+}
+echo "${QUERY_STRING}" | grep -qE "(^|\&|\?)index=[^\&]+" && {
+ export index="$( echo "${QUERY_STRING}" | grep -oE "(^|\&|\?)index=[^\&]+" | awk -F'=' '{$1="";print;}' | sed -r -e 's:^ ::' )"
+}
+# find gallery_id from query string
+echo "${QUERY_STRING}" | grep -qE "(^|\&|\?)id=[^\&]+" && {
+ export gallery_id="$( echo "${QUERY_STRING}" | grep -oE "(^|\&|\?)id=[^\&]+" | awk -F'=' '{$1="";print;}' | sed -r -e 's:^ ::' )"
+}
+
+# dynamically load the config file from the gallery_id defined in gallery-cgi.conf
+eval export sigal_conf_py=\"\${"${gallery_id}"}\"/sigal.conf.py
+
+# due to a limitation in the static site generator, I cannot get the full path of the image in the request, so we must rely on HTTP_REFERER and the provided index value (album.index_url).
+test -z "${HTTP_REFERER}" && {
+ echo "Invalid request. Please use the [edit] links in the main application."
+ response=1
+}
+
+# learn edit_enabled from config file
+edit_enabled="$( awk -F'=' '$1 ~ /edit_enabled/ {print $2}' "${sigal_conf_py}" | sed -r -e "s/[\"']//g;" -e 's/^ //;' | tr '[A-Z]' '[a-z]' )"
+
+# between HTTP_REFERER and index we should be able to figure the actual path of the file whose metadata to edit
+# count how many directories up
+up_count="$( echo "${index}" | tr '/' '\n' | grep -cE '\.\.' )" ; up_count=$(( up_count + 1 ))
+urlrootpath="$( echo "${HTTP_REFERER}" | sed -r -e 's@://@:==@;' | tr '\/' '\n' | head --lines=-${up_count} | tr '\n' '\/' | sed -r -e 's@:==@:\/\/@' )"
+subpath="/$( echo "${HTTP_REFERER}" | sed -r -e 's@://@:==@;' | tr '\/' '\n' | tail --lines=${up_count} | tr '\n' '\/' | sed -r -e 's:\/+:\/:g;' -e 's:\/$::' )"
+# remove any quote marks
+filerootpath="$( awk -F'=' -v 'a="' -v "b='" "\$1 ~ /source/ && \$2 ~ /./ {gsub(\$2,a,\"\");gsub(\$2,b,\"\");print \$2;}" "${sigal_conf_py}" 2>&1 | sed -r -e "s/'//g;" -e 's/^ //;' )"
+
+# react to if image=folder
+if test "${image}" = "folder" ;
+then
+ dataurl="${urlrootpath%%/}${subpath}"
+ # will not bother support thumbnails for folders
+ datafile="${filerootpath%%/}${subpath}"
+ metadatafile="${filerootpath%%/}${subpath%%/}/index.md"
+else
+ dataurl="${urlrootpath%%/}${subpath%%/}/${image}"
+ thumburl="${urlrootpath%%/}${subpath%%/}/thumbnails/${image}"
+ datafile="${filerootpath%%/}${subpath%%/}/${image}"
+ metadatafile="${datafile%%.???}.md" # yes, hardcoded to the .3 ending
+fi
+
+test -n "${DEBUG}" && test ${DEBUG} -ge 2 1>/dev/null 2>&1 && {
+ echo "image=${image}"
+ echo "index=${index}"
+ echo "up_count=${up_count}"
+ echo "urlrootpath=${urlrootpath}"
+ echo "subpath=${subpath}"
+ echo "filerootpath=${filerootpath}"
+ echo "dataurl=${dataurl}"
+ echo "datafile=${datafile}"
+ echo "metadatafile=${metadatafile}"
+}
+
+# it is OK if the metadatafile does not exist, we will just make it if writeable.
+# but we will only bother to work with existing files
+test ! -e "${datafile}" && {
+ echo "That file does not exist. Please try again."
+ response=1
+ printf '%s' "</body></html>"
+ exit ${response}
+}
+
+# check if writable
+if ! touch "${metadatafile}" ;
+then
+ echo "Need to determine what to do when not writeable."
+ response=1
+ export disabled="disabled" # or readonly, but disabled is clearer
+fi
+# check if edit_enabled
+if test "${edit_enabled}" = "false" ;
+then
+ export disabled="disabled"
+fi
+# get current values of metadatafile, which is markdown format
+title="$( awk -F':' '$1 ~ /Title/{$1="";print}' "${metadatafile}" 2>/dev/null | sed -r -e 's/^ *//;' )"
+thumbnail="$( awk -F':' '$1 ~ /Thumbnail/{$1="";print}' "${metadatafile}" 2>/dev/null | sed -r -e 's/^ *//;' )"
+author="$( awk -F':' '$1 ~ /Author/{$1="";print}' "${metadatafile}" 2>/dev/null | sed -r -e 's/^ *//;' )"
+# description is everything except the above tags.
+description="$( sed -r -e '/^(Title|Thumbnail|Author):/d' -e '/^\s*$/d' "${metadatafile}" )"
+test -n "${DEBUG}" && test ${DEBUG} -ge 1 1>/dev/null 2>&1 && {
+ echo "title: ${title}"
+ test "${image}" = "folder" && echo "thumbnail: ${thumbnail}"
+ echo "description: ${description}"
+}
+echo "</pre>"
+
+# show image if enabled
+test "${show_image}" = "1" && {
+ if test "${show_thumbnail}" = "1" ;
+ then
+ echo "<img src=\"${thumburl}\">"
+ else
+ # show full image
+ echo "<img src=\"${dataurl}\" width=\"100%\" max-width=\"800px\">"
+ fi
+ echo "<br>"
+}
+
+# provide a placeholder if the title is empty for a directory
+test -z "${title}" && test "${image}" = "folder" && {
+ placeholder="$( echo "${subpath}" | awk -F'/' '{print $NF}' )"
+ placeholdertag="placeholder=\"${placeholder}\""
+}
+
+# print the form
+if test "${image}" = "folder" ;
+then
+ echo "Folder: ${dataurl}"
+else
+ echo "Image: ${dataurl}"
+fi
+echo "<form method=\"post\" enctype="multipart/form-data" action=\"${apply_link}\" id=\"edit\">"
+echo " <label for=\"title\">Title:</label>"
+echo " <input type=\"text\" id=\"title\" name=\"title\" value=\"${title}\" ${placeholdertag} ${disabled}><br>"
+test "${image}" = "folder" && {
+ echo " <label for=\"thumbnail\">Thumbnail:</label>"
+ echo " <input type=\"text\" id=\"thumbnail\" name=\"thumbnail\" value=\"${thumbnail}\" ${disabled}><br>"
+ echo " <label for=\"author\">Author:</label>"
+ echo " <input type=\"text\" id=\"author\" name=\"author\" value=\"${author}\" ${disabled}><br>"
+}
+echo " <label for=\"description\">Description:</label>"
+#echo " <input form=\"edit\" type=\"textarea\" id=\"description\" name=\"description\" value=\"${description}\" ${disabled} rows=\"5\"></input><br>"
+echo " <textarea form=\"edit\" type=\"textarea\" id=\"description\" name=\"description\" ${disabled} rows=\"5\">${description}</textarea><br>"
+echo " <input type=\"hidden\" id=\"metadatafile\" name=\"metadatafile\" value=\"${metadatafile}\">"
+echo " <input type=\"hidden\" id=\"referer\" name=\"referer\" value=\"${HTTP_REFERER}\">"
+echo " <input type=\"hidden\" id=\"id\" name=\"id\" value=\"${gallery_id}\">"
+echo " <input type=\"reset\" value=\"Reset\">"
+echo " <input type=\"submit\" value=\"Update\">"
+echo "</form>"
+printf '%s' "</body></html>"
+exit ${response}
bgstack15