apk-get

#!/bin/bash
# Cli tool to download & Install apks from UpToDown, by KebabLord.
# VERSION: 3.0
# DEPENDS: curl, awk, grep

# Set default values
is_list=false
is_first=false
is_yes=false
res_limit=6

help_msg="USAGE: $0 <args> <app_name>

(no arg) : Prompts user to select one of the applications from list.
-l : Just list the available applications, don't install anything.
-f : Directly select the first result and install.
-y : Answer yes to \"Are you sure\" prompt.
-n : Select n'th result from list and install.
-a : Show all results, Don't limit results to $res_limit.
-h : Show this help message."

while getopts "lyan:fh" opt; do
    case $opt in
        l) is_list=true;;
        y) is_yes=true;;
        a) res_limit=36;;
        n) custom_index="$OPTARG";;
        f) res_limit=1;;
        *) echo "$help_msg"; exit 0;;
    esac
done
shift $((OPTIND-1))
app="$1"
[ -z "$app" ] && echo "$help_msg" && exit 1

# Function to send initial request.
send_req() {
    # First param being the mirror subdomain, 2nd param is the application name to be searched.
    curl -m 9 "https://$1.uptodown.com/android/search" -X POST -H \
        'User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0' -H \
        'Referer: https://en.uptodown.com/' --data-raw "singlebutton=&q=$2" 2>/dev/null
}

# Try different mirrors until one bypasses 500,503 and 504.
mirrors="fr en de tr es it pt zh ar id ko"
for mirror in $mirrors; do
    req=$(send_req $mirror $app) || continue
    grep "Error 503 first byte timeout\|Uptodown 500\|504 Gateway Time" &>/dev/null <<< "$req" && continue
    break
done

# Parse the results into url+title, exit if grep fails.
results=$(echo "$req" | grep -Po 'https:\/\/[a-z_-]+?\.[a-z][a-z].uptodown.com\/android" title="[^<>"]+')
[[ $? != 0 ]] && echo "ERROR: Couldn't find the application." && exit 1
amount=$(echo "$results" | wc -l)

# Print titles so user can choose one, also add each item to the lists.
i=1
while IFS= read -r res; do
    urls[$i]="$(awk -F '" title="[^ ]+ ' '{print $1}' <<< "$res")"
    titles[$i]="$(awk -F '" title="[^ ]+ ' '{print $2}' <<< "$res")"
    [ $amount -gt 1 ] && (! $is_first) && [ -z $custom_index ] && echo "$i) ${titles[$i]}"
    [[ "$i" == "$res_limit" ]] && break
    ((i++))
done <<< "$results"

# If "only list, not install" is enabled, quit.
$is_list && exit 0

# If "use directly the first result" or more than one result, show "choose" prompt.
if [[ "$custom_index" == ?(-)+([0-9]) ]]; then
    index=$custom_index
elif [ $res_limit -ne 1 ] || [ -z "${titles[2]}" ]; then
    echo -ne "\nSelect one from above: "
    read -r index
    echo
    [[ "$index" != ?(-)+([0-9]) ]] && ( echo Not a valid number. ; exit 1 )
else
    index=1
fi

app_url=${urls[$index]}
#app_url=$(sed "s/\.$mirror\./\./g" <<< $app_url ) #Remove .en.
app_title=${titles[$index]}
slug=$(grep -Po '(?<=https://)[^.]+' <<< $app_url) # Extract app-uri
echo -e "Selected: $app_title"

# Scrape file path by visiting the "downloads" page.
echo -e -n " - Loading download page..    "
#DEBUG: echo;echo DEBUG: curl -H 'User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0' -L --compressed "$app_url/dw"
src=$(curl -H 'User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0' -L --compressed "$app_url/dw" 2>/dev/null)
grep '404 Not Found' <<< "$src" >/dev/null && echo -e "\n\nERROR: Couldn't load download page, we might be blocked." && exit 1
echo OK


version=$(grep -Po '<div class="version">\K[^<]+' <<< "$src"  | sed 's/\./-/g')
hash=$(grep -Po 'data-url="\K[^"]+(?="\s+data-download)' <<< "$src" )
[[ -z "$version" || -z "$hash" ]] && echo -e "\n\nERROR: Couldn't parse file url." && exit 1
file_url="https://dw.uptodown.net/dwn/$hash$slug-$version.apk"

grep 'class="button variants"' <<< "$src" && {
    echo -n " - XAPK Detected, loading variant page...    "
    file_id=$(grep -m1 -Po 'data-file-id="\K\d+(?=")' <<< "$src") || { echo -e "\n\nERROR: Couldn't parse data-file-id."; exit 1; }
    variant_url="https://lmr-loyalty-free-music.en.uptodown.com/android/download/$file_id-x"
    src2=$(curl -H 'User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0' -L --compressed "$variant_url")
    hash=$(grep -Po 'data-url="\K[^"]+(?="\s+data-download)' <<< "$src2" )
    [[ -z "$hash" ]] && echo -e "\n\nERROR: Couldn't parse file hash." && exit 1
    echo OK
    file_url="https://dw.uptodown.net/dwn/$hash$slug-$version.xapk"
    x="x";X="X"
}

#DEBUG: echo VARIANT: $variant_url;echo FILE_URL: $file_url;echo HASH: $hash;echo VERSION: $version;exit 0

# Download the file.
echo " - Downloading the ${X}APK"
curl -L --progress-bar -o "$app.${x}apk" "$file_url"

[[ -n "$x" ]] && exit 0 # Exit early as we can't install XAPK files for now.

# Install the apk.
if ($is_yes || (read -p "Do you want to install the apk? (y/n): " yn && [[ $yn == y ]])); then

    if su -c true &>/dev/null;then
      sudo="su -c"
    fi
    $sudo pm install "$app.apk" 2>/dev/null && exit 0

    if which termux-open &>/dev/null;then
        termux-open "$app.apk" && exit 0
    fi
    echo "Couldn't install the APK. Read the README of this script for more information regarding installing apks."; exit 1
fi