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#!/bin/bash
# (C)2018 Gustavo 'Gustavo6046' Rehermann. The MIT license.
# (C) SVOX. All rights reserved.    (right?)

echo # Blank lines are good for the eye!

depcheckees=("pico2wave")
dependencies=("libttspico-utils") # used for dependency check

checkpkg() {
    if [[ $(dpkg-query -W -f='${Status}' $1) == "ok installed" ]]; then
        return 0

    else
        return 1

    fi
}

installdeps() {
    echo "At least one dependency was not found!"
    echo "Do you want to install them automatically"
    echo "using apt-get? (y/n)"
    read -p ":" -n1 -r
    echo
    echo

    if [[ $REPLY =~ ^[Yy]$ ]]; then
        echo "  > Updating package list..."
        echo
        apt-get update -y

        echo
        echo
        echo "  > Done. Installing missing dependencies..."
        echo

        for dep in "${dependencies}"; do
            if ! checkpkg $dep; then
                echo " + ${dep}"
                apt-get install -y $dep

            fi
        done

    else
        echo "Missing dependencies: aborting."
        exit

    fi
}

depcheck() {
    for dep in "${depcheckees}"; do
        if ! which $dep >/dev/null; then
            installdeps
            break

        fi
    done
}

depcheck

convert() {
    if [[ -f "$1" ]]; then
        fn=$(basename $1 | sed "s/\.[^.]*$//")
        pico2wave -l=en-US -w="./out/${fn}.wav" "$(<"$1")"
        echo "$1 converted to ./out/${fn}.wav successfully."

    else
        echo "$1 not found! Ignoring."

    fi
}

forcehelp() {
    (
        echo "ADSS (Automatic Dubbing Shell Script) is a simple"
        echo "script program that automatizes text to"
        echo "speech, by taking a dubbing list (dubs.txt"
        echo "in the current directory), and convert all"
        echo "the listed dubs into WAV files in the output"
        echo "folder."
        echo
        echo "Using it isn't too difficult:"
        echo
        echo "   1.  Create two folders which you want to"
        echo "       set up:"
        echo
        echo "       * ./dubs/ contains all the text files"
        echo "         you want to convert."
        echo "       * ./out/ will contain all the audio"
        echo "         output you'll eventually get."
        echo
        echo "   2.  Place all the text files you want to"
        echo "       convert into the dubs/ folder, and"
        echo "       list all of their filenames (without"
        echo "       extension!!) into dubs.txt (in the"
        echo "       current folder). You might want to"
        echo "       use a listing command like ls for"
        echo "       this."
        echo
        echo "   3. Run this script!"
        echo
        echo "You can also modify the text files later on"
        echo "and rerun this script just fine."
        echo
        echo "Alternatively to creating the dubs.txt list,"
        echo "you can simply convert all the files inside the"
        echo "input folder!"
        echo
        echo "(C)2018 Gustavo 'Gustavo6046' Rehermann. The MIT license."
        echo "(C) SVOX. All rights reserved.   (right?)"
        echo

    ) | more
}

help() {
    if [[ -t 1 ]]; then
        echo "Do you want help? (y/n)"
        read -p ":" -n1 -r
        echo

        if [[ $REPLY =~ ^[Yy]$ ]]; then
            forcehelp

        fi
    fi
}

errhelp() {
    echo "$1"
    echo
    help
}

if [[ "$1" == "-h" ]] || [[ "$1" == "--help" ]]; then
    forcehelp
    exit

fi

if [[ ! -d "./dubs/" ]] || [[ ! -d "./out/" ]]; then
    echo "Either the input (dubs/) or output (out/)"
    echo "directory is missing! Do you want the script"
    echo "to make them for you? (y/n)"
    read -p ":" -n1 -r
    echo
    echo

    if [[ $REPLY =~ ^[Yy]$ ]]; then
        mkdir -p dubs
        mkdir -p out

        echo "Directories were succesfully created."
        echo "Consider re-running the script once"
        echo "you're set up (accept some help for"
        echo "more details!)."

    fi

    echo
    help
    exit
fi

if [[ ! -f dubs.txt ]]; then
    echo "No dubbing list found!"
    echo
    echo "Do you want the script to convert all the files"
    echo "inside the input folder automatically for you? (y/n)"
    read -p ":" -n1 -r
    echo
    echo

    if [[ $REPLY =~ ^[Yy]$ ]]; then
        echo "Converting every input file."

        for p in ./dubs/*; do if [[ -f "$p" ]]; then
            convert "$p"

        fi; done

    else
        help
        exit

    fi

else
    while read -r p; do
        convert "./dubs/$p"

    done <dubs.txt

fi

echo