dotfiles/home/user/.config/bash/functions

# vim: ft=bash

_sod() {
    if [ -d "$1" ] && [ -n "$(ls "$1")" ]; then
        local filename
        for filename in $(ls "$1" | sort -n)
        do
            source "${1}/${filename}"
        done
    fi
}

lt() {
    du -h "${1:-.}" 2>/dev/null | sort -h
}

destroy() {
    local -r filename="${1}"

    if [[ ! -f "${filename}" ]]; then
        echo "destroy: File '${filename}' not found" >&2
        return 1
    fi

    local filesize
    filesize="$(du -hs "${filename}" | awk '{printf $1}')"
    readonly filesize

    echo -n "Sure want to destroy file '${filename}' with size ${filesize} [y/N] "

    local response
    read -r response
    readonly response
    if [[ ! "${response}" == [yY] ]]; then
        return 1
    fi

    shred -zun 3 "${filename}"
}

workon() {
    source "/opt/pythonenv/${1:-$(basename "$PWD")}/bin/activate"
}

py() {
    if [[ -z "$@" && -x "$(command -v ipython 2>/dev/null)" ]]; then
        ipython -i -c "q = exit"
    else
        python3 "$@"
    fi
}

ve() {
    python3 -m virtualenv "${1:-venv}" && . "${1:-venv}/bin/activate"
}

va() {
    if [[ -v 1 ]]; then
        if [[ -f "${1}/bin/activate" ]]; then
            source "${1}/bin/activate"
            return 0
        fi
        echo "va: error: virtual environment ${1} not found, use python3 -m virtualenv venv" >&2
        return 1
    fi

    if [[ -f "./venv/bin/activate" ]]; then
        source "./venv/bin/activate"
        return 0
    fi

    local activate_venv
    activate_venv="$(find -P . -maxdepth 3 -type f -wholename '*/bin/activate' | sort | head -n 1)"
    readonly activate_venv

    if [[ -f "$activate_venv" ]]; then
        source "$activate_venv"
        return 0
    else
        echo "va: error: virtual environment not found, use python3 -m virtualenv venv" >&2
        return 1
    fi
}


extract() (
    if [ -z "$1" ]; then
        echo "extract: error: usage: extract <path/file_name>.<zip|rar|bz2|gz|tar|tbz2|tgz|Z|7z|xz|ex|tar.bz2|tar.gz|tar.xz>"
        return 2
    fi

    if ! [ -f "$1" ]; then
        echo "extract: error: '$1' file does not exist" >&2
        return 1
    fi

    local -r name="${1%%.*}"  # removes extension from filename
    if [ -e "$name" ]; then
        echo "extract: error: '$name' exists" >&2
        return 1
    fi

    mkdir "$name" && cd "$name" || return 1

    case $1 in
        *.tar.bz2)  tar xjf      ../"$1" ;;
        *.tar.gz)   tar xzf      ../"$1" ;;
        *.tar.xz)   tar xJf      ../"$1" ;;
        *.lzma)     unlzma       ../"$1" ;;
        *.bz2)      bunzip2      ../"$1" ;;
        *.rar)      unrar x -ad  ../"$1" ;;
        *.gz)       gunzip       ../"$1" ;;
        *.tar)      tar xf       ../"$1" ;;
        *.tbz2)     tar xjf      ../"$1" ;;
        *.tgz)      tar xzf      ../"$1" ;;
        *.zip)      unzip        ../"$1" ;;
        *.Z)        uncompress   ../"$1" ;;
        *.7z)       7z x         ../"$1" ;;
        *.xz)       unxz         ../"$1" ;;
        *.exe)      cabextract   ../"$1" ;;
        *)          echo "extract: error: '$1' - unknown archive method" >&2 ;;
    esac
)

mcd() {
    if [ -z "$1" ]; then
        cd "$(mktemp -td "${USER:-user}.XXXX")"
    else
        mkdir -p "$1" && cd "$1"
    fi
}

open() {
    test -e "$1" || return 1
    nohup xdg-open "$1" 1>/dev/null 2>&1 &
}

split-file() {
    if [[ ! -e "$1" ]]; then
        echo "file '${1}' not found" >&2
        return 1
    fi

    local -r size="${2:-1G}"

    mkdir "${1}.splitted"
    cd "${1}.splitted"
    split -d -b "$size" "../${1}"
}

json() {
    if [ -t 0 ]; then
       python -m json.tool <<< "$*"
    else  # pipe
       python -m json.tool
    fi
}

_get_full_file_extension() {
    local filename
    filename="$(basename "$1")"
    readonly filename

    if [ "${filename:0:1}" = "." ]; then
        filename="${filename:1}"
    fi
    echo "${filename#*.}"
}

rmt() {
    local -r trash="${TRASH:-"${HOME}/.trash"}"

    local filename
    for filename in "$@"
    do
        local filename_out_path
        filename_out_path="${trash}$(realpath "$filename")"
        readonly filename_out_path

        mkdir -p "$(dirname "$filename_out_path")"
        mv "$filename" "${filename_out_path}_$(date +%s)"
    done
}

showtips() {
    local -r tips_dir="${HOME}/.tips"

    if [ ! -d "$tips_dir" ]; then
        mkdir "$tips_dir" 2>/dev/null
        git init "$tips_dir"
    fi

    local content
    local filename
    for filename in "$tips_dir"/*
    do
        content="$(cat "$filename")"
        echo "$content"
    done
    return 0
}

most-often-commands() {
    history 0 | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn
}

# Enable X11Forwarding and disable mux session
sshx() {
    ssh -X -o ControlMaster=no -o ControlPath=none "$@"
}

django-create-project() (
    set -ue
    local -r project_name="${1}"

    mkdir "${project_name}"
    cd "${project_name}"
    python3 -m virtualenv venv
    . venv/bin/activate
    pip install django
    django-admin startproject core .
    git init
)

cleanup-directory() {
    local -r directory="${1}"

    if [[ ! -d "${directory}" ]]; then
        echo "Directory '${directory}' not found" >&2
        return 1
    fi

    age="+21" # Notation: +n  => "At least n days"
    echo "Deleting files not accessed for a ${age} days:"
    find "${directory}" -atime "${age}" -exec rm -fv {} \;

    echo "Deleting empty directories:"
    find "${directory}" -type d -empty -print -delete
}

cleanup-downloads() {
    local -r downloads_directory="${HOME}/Downloads"
    local -r log_file="${downloads_directory}/cleanup.log"

    touch "${log_file}"

    echo "$(date -Iseconds) : Start cleanup" >> "${log_file}"
    cleanup-directory "${downloads_directory}" >> "${log_file}"
}

_bak() {
    local -r filename="${1}"
    mv "${filename}" "${filename}.bak"
}

_unbak() {
    local -r filename="${1}"
    local -r new_filename="${filename/%.bak/}"

    if [[ -e "${new_filename}" ]]; then
        echo "Filename '${new_filename}' already exists" >&2
        return 1
    fi

    mv "${filename}" "${new_filename}"
}

bak() {
    local filename
    for filename in "$@"; do
        if [[ "${filename: -4}" = ".bak" ]]; then
            _unbak "${filename}"
        else
            _bak "${filename}"
        fi
    done
}