-#!/bin/bash
-
-# Date: 2020-02-08T22:21Z
-
-# Author: Steven Baltakatei Sandoval
-
-# License: This bash script, 'bkcc', is licensed under GPLv3 or
-# later by Steven Baltakatei Sandoval:
-#
-# 'bkcc', a Creative Commons HTML tag generator.
-# Copyright (C) 2020 Steven Baltakatei Sandoval (baltakatei.com)
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# A copy of the GNU General Public License may be found at
-# <https://www.gnu.org/licenses/>.
-#
-# The structure of this script was modeled after the following
-# Creative Commons license choosers:
-#
-# https://creativecommons.org/choose/
-# https://chooser-beta.creativecommons.org/
-
-# Description: bkcc - A tool that creates a machine-readable (RDFa
-# XML) Creative Commons license tag. The tag is generated using
-# information prompted from the user and exported to stdout.
-
-# Usage: bkcc [ OPTIONS ]
-
-
-#==DEFINITIONS==
-
-# regular expression for identifying valid URLs (source: http://regexlib.com/REDetails.aspx?regexp_id=1051 )
-regexURL="((http\://|https\://|ftp\://)|(www.))+(([a-zA-Z0-9\.-]+\.[a-zA-Z]{2,4})|([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}))(/[a-zA-Z0-9%:/-_\?\.'~]*)?"
-
-# Define 'echoerr' function which outputs text to stderr
- # Note: function copied from https://stackoverflow.com/a/2990533
-echoerr() {
- echo "$@" 1>&2;
-}
-
-promptAttribute() {
- ###echoerr "Note: RECOMMENDED options promote \"Free Cultural Works\" as defined by creativecommons.org"
- echoerr "======================================================="
- echoerr "Do you want to require attribution for your work? (y/n)"
- echoerr " y) Yes, anyone using my work must give me appropriate credit (RECOMMENDED)."
- echoerr " n) No, anyone can use my work even without attribution."
- read m
- case $m in
- y | Y | yes | 1) OPTION_BY="true";;
- n | N | no | 2)
- echoerr "======================================================="
- echoerr "I hereby waive all copyright and related or neighboring rights together with all"
- echoerr "associated claims and causes of action with respect to this work to the extent"
- echoerr "possible under law according to"
- echoerr "https://creativecommons.org/publicdomain/zero/1.0/ ."
- echoerr ""
- echoerr "I have read and understood the terms and intended legal effect of CC0, and"
- echoerr "hereby voluntarily elect to apply it to this work (y/n):"
- read m
- case $m in
- y | Y | yes | 1) OPTION_BY="false";
- echoerr "DEBUG: OPTION_BY set to $OPTION_BY"
- return 1
- ;;
- n | N | no | 2) echoerr "No license selected. Exiting."; exit 1;;
- *) echoerr "Invalid CC0 release option. Exiting."; exit 1;;
- esac ;;
- *) echoerr "Invalid attribution requirement option. Exiting."; exit 1;;
- esac
-}
-
-promptCommercial() {
- echoerr "======================================================="
- echoerr "Do you want to prohibit others commercial use of your work? (y/n)"
- echoerr " y) Yes, others cannot use my work for commercial purposes."
- echoerr " n) No, others can use my work for commercial purposes (RECOMMENDED)."
- read m
- case $m in
- y | Y | yes | 1) OPTION_NC="true"; echoerr "DEBUG: OPTION_NC set to $OPTION_NC";;
- n | N | no | 2) OPTION_NC="false"; echoerr "DEBUG: OPTION_NC set to $OPTION_NC";;
- *) echoerr "Invalid commercial use permission option. Exiting."; exit 1;;
- esac
-}
-
-promptDerivatives() {
- echoerr "======================================================="
- echoerr "Do you want to prohibit others from distributing your work if they remix, transform, or build upon it?"
- echoerr " y) Yes, others can use and share my work only as is, without modifications."
- echoerr " n) No, others may share modified versions of my work (RECOMMENDED)."
- read m
- case $m in
- y | Y | yes | 1) OPTION_ND="true"; echoerr "DEBUG: OPTION_ND set to $OPTION_ND";;
- n | N | no | 2) OPTION_ND="false"; echoerr "DEBUG: OPTION_ND set to $OPTION_ND";;
- *) echoerr "Invalid derivative use permission option. Exiting."; exit 1;;
- esac
-}
-
-promptShareAlike() {
- echoerr "======================================================="
- echoerr "Do you want to prohibit your work under other terms?"
- echoerr " y) Yes, anyone who changes your work must share their contributions under the same license as the original. (RECOMMENDED)"
- echoerr " n) No, anyone who changes your work can distribute their contributions under a different license."
- read m
- case $m in
- y | Y | yes | 1) OPTION_SA="true"; echoerr "DEBUG: OPTION_SA set to $OPTION_SA";;
- n | N | no | 2) OPTION_SA="false"; echoerr "DEBUG: OPTION_SA set to $OPTION_SA";;
- *) echoerr "Invalid sharealike requirement option. Exiting."; exit 1;;
- esac
-}
-
-promptLicenseDetails() {
- # Usage: promptLicenseDetails
- # Description: Sets LICENSE_TYPE by questioning user.
-
- echoerr "DEBUG: Beginning promptLicenseDetails function."
-
- # Evaluate BY option.
- # Ask if author wishes to be attributed.
- promptAttribute # set OPTION_BY to true or false.
- if [[ $OPTION_BY == "false" ]]; then
- LICENSE_TYPE="CC 1.0"
- echoerr "DEBUG: LICENSE_TYPE set to $LICENSE_TYPE"
- return 1;
- fi
-
- # Evaluate NC option.
- # Ask if author permits commercial use of work.
- promptCommercial # set OPTION_NC to true or false.
-
- # Evaluate ND option.
- # Ask if author permits derivative use of work.
- promptDerivatives # set OPTION_ND to true or false.
-
- # Evaluate SA option.
- # Ask if author requires derivative works to also carry same license as work.
- if [[ $OPTION_ND = "true" ]]; then
- OPTION_SA="false" # An SA work cannot be made from an ND work.
- else
- promptShareAlike # set OPTION_SA to true or false.
- fi
-
- # Check for CC BY
- if [[ $OPTION_BY == "true" ]] && \
- [[ $OPTION_NC == "false" ]] && \
- [[ $OPTION_ND == "false" ]] && \
- [[ $OPTION_SA == "false" ]]
- then
- LICENSE_TYPE="CC BY 4.0"
- return
- fi
-
- # Check for CC BY-SA
- if [[ $OPTION_BY == "true" ]] && \
- [[ $OPTION_NC == "false" ]] && \
- [[ $OPTION_ND == "false" ]] && \
- [[ $OPTION_SA == "true" ]]
- then
- LICENSE_TYPE="CC BY-SA 4.0"
- return
- fi
-
- # Check for CC BY-ND
- if [[ $OPTION_BY == "true" ]] && \
- [[ $OPTION_NC == "false" ]] && \
- [[ $OPTION_ND == "true" ]] && \
- [[ $OPTION_SA == "false" ]]
- then
- LICENSE_TYPE="CC BY-ND 4.0"
- return
- fi
-
- # Check for CC BY-NC
- if [[ $OPTION_BY == "true" ]] && \
- [[ $OPTION_NC == "true" ]] && \
- [[ $OPTION_ND == "false" ]] && \
- [[ $OPTION_SA == "false" ]]
- then
- LICENSE_TYPE="CC BY-NC 4.0"
- return
- fi
-
- # Check for CC BY-NC-SA
- if [[ $OPTION_BY == "true" ]] && \
- [[ $OPTION_NC == "true" ]] && \
- [[ $OPTION_ND == "false" ]] && \
- [[ $OPTION_SA == "true" ]]
- then
- LICENSE_TYPE="CC BY-NC-SA 4.0"
- return
- fi
-
- # Check for CC BY-NC-ND
- if [[ $OPTION_BY == "true" ]] && \
- [[ $OPTION_NC == "true" ]] && \
- [[ $OPTION_ND == "true" ]] && \
- [[ $OPTION_SA == "false" ]]
- then
- LICENSE_TYPE="CC BY-NC-ND 4.0"
- return
- fi
-
- # Error message if none of the above if statements returned out of function.
- echoerr "ERROR: Invalid license specified or LICENSE_TYPE not set."; exit 1;
-
-}
-
-selectLicense() {
- # Usage: selectLicense
- # Description: Sets LICENSE_TYPE variable according to a set of user prompts.
-
- # Prompt license type
- echoerr "Select license type:"
- echoerr " 0) I don't know. Guide me."
- echoerr " 1) CC0 1.0 \"CC0 1.0 Universal\""
- echoerr " 2) CC BY 4.0 \"Attribution 4.0 International\""
- echoerr " 3) CC BY-SA 4.0 \"Attribution-ShareAlike 4.0 International\""
- echoerr " 4) CC BY-ND 4.0 \"Attribution-NoDerivatives 4.0 International\""
- echoerr " 5) CC BY-NC 4.0 \"Attribution-NonCommercial 4.0 International\""
- echoerr " 6) CC BY-NC-SA 4.0 \"Attribution-NonCommercial-ShareAlike 4.0 International\""
- echoerr " 7) CC BY-NC-ND 4.0 \"Attribution-NonCommercial-NoDerivatives 4.0 International\""
- read n
- case $n in
- 0) promptLicenseDetails; return;; # Sets LICENSE_TYPE via many questions to user.
- 1) LICENSE_TYPE="CC 1.0";;
- 2) LICENSE_TYPE="CC BY 4.0";;
- 3) LICENSE_TYPE="CC BY-SA 4.0";;
- 4) LICENSE_TYPE="CC BY-ND 4.0";;
- 5) LICENSE_TYPE="CC BY-NC 4.0";;
- 6) LICENSE_TYPE="CC BY-NC-SA 4.0";;
- 7) LICENSE_TYPE="CC BY-NC-ND 4.0";;
- *) echoerr "Invalid option selected. Exiting."; exit 1;;
- esac
-
-}
-
-#==MAIN PROGRAM==
-selectLicense # Sets LICENSE_TYPE via simple prompt.
-
-# Display value of $LICENSE_TYPE
-echoerr "======================================================="
-echoerr "$LICENSE_TYPE"" license selected."
-
-# Prompt metadata
-echoerr "======================================================="
-echoerr "Specify metadata (leave blank if not needed):"
-read -p " Title of work [title]:" workTitle
-read -p " Attribute work to [author]:" workAuthor
-
-read -p " Attribute work to (ex: author's website) [URL]:" workAuthorURL
-if [[ -n $workAuthorURL ]]; then
- while [[ ! $workAuthorURL =~ $regexURL ]]; do
- echoerr "WARNING: URL may contain error (ex: does not begin with \"https://\"."
- echoerr " Preappend \"http://\" to URL? (y/n)"
- read m
- case $m in
- y | Y | yes | 1) workAuthorURL="http://""$workAuthorURL" ;;
- n | N | no | 2) read -p " Attribute work to (ex: author's website) [URL]:" workAuthorURL ;;
- *) ;;
- esac
- done
-fi
-
-read -p " Source work from which work was derived (leave blank if original work) [URL]:" workSourceURL
-if [[ -n $workSourceURL ]]; then
- while [[ ! $workSourceURL =~ $regexURL ]]; do
- echoerr "WARNING: URL may contain error (ex: does not begin with \"https://\."
- echoerr " Preappend \"http://\" to URL? (y/n)"
- read m
- case $m in
- y | Y | yes | 1) workSourceURL="http://""$workSourceURL" ;;
- n | N | no | 2) read -p " Source work from which work was derived (leave blank if original work) [URL]:" workSourceURL ;;
- *);;
- esac
- done
-fi
-
-read -p " Webpage where more additional permissions may be requested (OPTIONAL) [URL]:" morePermissionsURL
-if [[ -n $morePermissionsURL ]]; then
- while [[ ! $morePermissionsURL =~ $regexURL ]]; do
- echoerr "WARNING: URL may contain error (ex: does not begin with \"https://\."
- echoerr " Preappend \"http://\" to URL? (y/n)"
- read m
- case $m in
- y | Y | yes | 1) morePermissionsURL="http://""$morePermissionsURL";;
- n | N | no | 2) read -p " Webpage where more additional permissions may be requested (OPTIONAL) [URL]:" morePermissionsURL ;;
- esac
- done
-fi
-
-#===CONSTRUCT RDFA TAG===
-#====RDFA:Handle workTitle, workAuthor, workAuthorURL====
-###echoerr "DEBUG: workTitle is --$workTitle--"
-###echoerr "DEBUG: workAuthor is --$workAuthor--"
-###echoerr "DEBUG: workAuthorURL is --$workAuthorURL--"
-###echoerr "DEBUG: workSourceURL is --$workSourceURL--"
-###echoerr "DEBUG: morePermissionsURL is --$morePermissionsURL--"
-###echoerr "DEBUG: LICENSE_TYPE is --$LICENSE_TYPE--"
-
-# Exit early if critical parameters not provided
-if [[ -z "$workTitle" ]] || \
- [[ ! -v LICENSE_TYPE ]];
-then
- echoerr "ERROR: Problem with workTitle or LICENSE_TYPE."
- exit 1;
-fi
-
-# Add workTitle to OUTPUT variable
-OUTPUT=$OUTPUT"<span xmlns:dct=\"http://purl.org/dc/terms/\" property=\"dct:title\">$workTitle</span>"
-
-# Add workAuthor and/or workAuthorURL to OUTPUT variable (if applicable)
-if [[ -v workAuthor ]]; then
- if [[ -v workAuthorURL ]]; then
- # workAuthor set, workAuthorURL set
- OUTPUT=$OUTPUT" by <a xmlns:cc=\"http://creativecommons.org/ns#\" href=\"$workAuthorURL\" property=\"cc:attributionName\" rel=\"cc:attributionURL\">$workAuthor</a>"
- else
- #workAuthor set, workAuthorURL not set
- OUTPUT=$OUTPUT" by <span xmlns:cc=\"http://creativecommons.org/ns#\" property=\"cc:attributionName\">$workAuthor</span>"
- fi
-fi
-
-#====RDFA:Handle LICENSE_TYPE====
-# Add selected license to OUTPUT variable
-
-# Add boilerplate
-OUTPUT=$OUTPUT" is licensed under "
-
-# Add license text
-case $LICENSE_TYPE in
- "CC 1.0")
- OUTPUT=$OUTPUT"<a href=\"https://creativecommons.org/publicdomain/zero/1.0/\" target=\"_blank\" rel=\"license noopener noreferrer\" style=\"display: inline-block;\">CC0 1.0</a><a href=\"https://creativecommons.org/publicdomain/zero/1.0/\"><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-cc0_icon.svg\" /></a>"
- ;;
- "CC BY 4.0")
- OUTPUT=$OUTPUT"<a href=\"https://creativecommons.org/licenses/by/4.0/\" target=\"_blank\" rel=\"license noopener noreferrer\" style=\"display: inline-block;\">CC BY 4.0</a><a href=\"https://creativecommons.org/licenses/by/4.0/\"><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-by_icon.svg\" /></a>"
- ;;
- "CC BY-SA 4.0")
- OUTPUT=$OUTPUT"<a href=\"https://creativecommons.org/licenses/by-sa/4.0/\" target=\"_blank\" rel=\"license noopener noreferrer\" style=\"display: inline-block;\">CC BY-SA 4.0</a><a href=\"https://creativecommons.org/licenses/by-sa/4.0/\"><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-by_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-sa_icon.svg\" /></a>"
- ;;
- "CC BY-ND 4.0")
- OUTPUT=$OUTPUT"<a href=\"https://creativecommons.org/licenses/by-nd/4.0/\" target=\"_blank\" rel=\"license noopener noreferrer\" style=\"display: inline-block;\">CC BY-ND 4.0</a><a href=\"https://creativecommons.org/licenses/by-nd/4.0/\"><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-by_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-nd_icon.svg\" /></a>"
- ;;
- "CC BY-NC 4.0")
- OUTPUT=$OUTPUT"<a href=\"https://creativecommons.org/licenses/by-nc/4.0/\" target=\"_blank\" rel=\"license noopener noreferrer\" style=\"display: inline-block;\">CC BY-NC 4.0</a><a href=\"https://creativecommons.org/licenses/by-nc/4.0/\"><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-by_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-nc_icon.svg\" /></a>"
- ;;
- "CC BY-NC-SA 4.0")
- OUTPUT=$OUTPUT"<a href=\"https://creativecommons.org/licenses/by-nc-sa/4.0/\" target=\"_blank\" rel=\"license noopener noreferrer\" style=\"display: inline-block;\">CC BY-NC-SA 4.0</a><a href=\"https://creativecommons.org/licenses/by-nc-sa/4.0/\"><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-by_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-nc_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-sa_icon.svg\" /></a>"
- ;;
- "CC BY-NC-ND 4.0")
- OUTPUT=$OUTPUT"<a href=\"https://creativecommons.org/licenses/by-nc-nd/4.0/\" target=\"_blank\" rel=\"license noopener noreferrer\" style=\"display: inline-block;\">CC BY-NC-ND 4.0</a><a href=\"https://creativecommons.org/licenses/by-nc-nd/4.0/\"><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-by_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-nc_icon.svg\" /><img style=\"height:22px!important;margin-left: 3px;vertical-align:text-bottom;opacity:0.7;\" src=\"https://search.creativecommons.org/static/img/cc-nd_icon.svg\" /></a>"
- ;;
- *) echoerr "Error."; exit 1;;
-esac
-# End sentence.
-OUTPUT=$OUTPUT"."
-
-
-#====RDFA:Handle workSourceURL, morePermissionsURL (if applicable)====
-# Add workSourceURL to OUTPUT (if applicable)
-if [[ -n "$workSourceURL" ]]; then
- OUTPUT=$OUTPUT"<br />$workTitle is based on a work at <a xmlns:dct=\"http://purl.org/dc/terms/\" href=\"$workSourceURL\" rel=\"dct:source\">$workSourceURL</a>"
- # End sentence.
- OUTPUT=$OUTPUT"."
-fi
-
-# Add morePermissionsURL to OUTPUT (if applicable)
-if [[ -n "$morePermissionsURL" ]]; then
- OUTPUT=$OUTPUT"<br />Permissions beyond the scope of this license may be available at <a xmlns:cc=\"http://creativecommons.org/ns#\" href=\"$morePermissionsURL\" rel=\"cc:morePermissions\">$morePermissionsURL</a>"
- #End sentence
- OUTPUT=$OUTPUT"."
-fi
-
-
-
-#====Deliver output====
-# Send OUTPUT to stdout.
-echo $OUTPUT