download all volumes of the computer music journal

fetch_computer_music_journals.sh

#!/bin/bash

base_dir=computer_music_journals
download_count=0
mkdir -p $base_dir && cd $base_dir
for volume in {23..43}; do
    mkdir -p "volume_$volume" && cd "volume_$volume"
    for issue in {1..4}; do
        if [[ $volume -eq 43 ]]
        then
            if [[ $issue -eq 2 ]]
            then
                issue="2-3"
            elif [[ $issue -eq 3 ]] 
            then 
                continue;
            fi
        fi
        mkdir -p $issue && cd $issue
        wget -A.html "https://www.mitpressjournals.org/toc/comj/$volume/$issue/"
        rg -ioP '(?<=/doi/pdf/).*?(?=">PDF)' index.html | sed 's/^/https:\/\/www.mitpressjournals.org\/doi\/pdf\//' > urls.txt
        url_count=0
        while IFS="" read -r link || [ -n "$link" ]
        do
            title="${titles[$url_count]}"
            printf '\n%s\n' "$link"
            wget -O "issue_$issue-$url_count.pdf" $link
            (( url_count++ ))
            (( download_count++ ))
        done < urls.txt
        touch $(cat index.html | rg -oP '(?<=<span class="issueInfo">).*?(?=</span>)' | sed -e 's/\s/_/g')
        rm index.html
        cd ..
    done
    cd ..
done
cd ..
printf "\v\t in total $download_count pdf files were saved"
# copyleft (C<-) salkin mada 2021