bash_functions

#!/bin/bash

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# Clone a repository and install its dependencies.

clone() {

    git clone "$1" \
        || return

    cd "$(basename "${1%.*}")" \
        || return

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    # Check if there are dependencies to be installed.

    if [ ! -f "package.json" ]; then
        return
    fi

    # Check if the project uses Yarn.

    if [ -f "yarn.lock" ] && command -v "yarn" $> /dev/null; then
        printf "\n"
        yarn install
        return
    fi

    # If not, assume it uses npm.

    if command -v "npm" $> /dev/null; then
        printf "\n"
        npm install
    fi

}

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# Create data URI from a file.

datauri() {

    local mimeType=""

    if [ ! -f "$1" ]; then
        printf "%s is not a file.\n" "$1"
        return
    fi

    mimeType=$(file --brief --mime-type "$1")
    #               └─ do not prepend the filename to the output

    if [[ $mimeType == text/* ]]; then
        mimeType="$mimeType;charset=utf-8"
    fi

    printf "data:%s;base64,%s" \
        "$mimeType" \
        "$(openssl base64 -in "$1" | tr -d "\n")"

}

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# Delete files that match a certain pattern from the current directory.

delete-files() {
    local q="${1:-*.DS_Store}"
    find . -type f -name "$q" -ls -delete
}

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# Execute Vim macro

evm() {

    local numberOfTimes="${*: -1}"
    local files

    if [[ "$numberOfTimes" =~ ^[0-9]+$ ]]; then
        files=("${@:1:$#-1}")
    else
        numberOfTimes="1"
        files=("$@")
    fi

    for file in "${files[@]}"; do
        printf "* %s\n" "$file"
        vim \
            -c "norm! $numberOfTimes@q" \
            -c "wq" \
            "$file"
    done

}

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# Process phone photo.

ppp() {

    # Check if ImageMagick's convert command-line tool is installed.

    if ! command -v "convert" $> /dev/null; then
        printf "ImageMagick's 'convert' command-line tool is not installed!"
        exit
    fi

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    declare option="$1"
    declare photo="${2:-*.jpg}"
    declare geometry="${3:-50%}"

    if [ "$option" != "clean" ] &&
       [ "$option" != "resize" ]; then
        option="resize"
        photo="${1:-*.jpg}"
        geometry="${2:-50%}"
    fi

    if [[ "$(echo "${photo##*.}" | tr '[:upper:]' '[:lower:]')" != "png" ]]; then
        newPhotoName="${photo%.*}.png"
    else
        newPhotoName="_${photo%.*}.png"
    fi

    if [ "$option" == "resize" ]; then

        convert \
            "$photo" \
            -colorspace RGB \
            +sigmoidal-contrast 11.6933 \
            -define filter:filter=Sinc \
            -define filter:window=Jinc \
            -define filter:lobes=3 \
            -sigmoidal-contrast 11.6933 \
            -colorspace sRGB \
            -background transparent \
            -gravity center \
            -resize "$geometry" \
            +append \
            "$newPhotoName" \
        && printf "* %s (%s)\n" \
                "$newPhotoName" \
                "$geometry"

        return
    fi

    convert \
        "$photo" \
        -morphology Convolve DoG:10,10,0 \
        -negate \
        -normalize \
        -blur 0x1 \
        -channel RBG \
        -level 10%,91%,0.1 \
        "$newPhotoName" \
    && printf "* %s\n" "$newPhotoName"

}

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# Search history.

h() {
    #           ┌─ Enable colors for pipe.
    #           │  ("--color=auto" enables colors only
    #           │   if the output is in the terminal.)
    grep --color=always "$*" "$HISTFILE" \
        | less --no-init --raw-control-chars
          #    │         └─ Display ANSI color escape sequences in raw form.
          #    └─ Don't clear the screen after quitting less.
}

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# Search for text within the current directory.

s() {
    grep --color=always "$*" \
         --exclude-dir=".git" \
         --exclude-dir="node_modules" \
         --ignore-case \
         --recursive \
         . \
        | less --no-init --raw-control-chars
          #    │         └─ Display ANSI color escape sequences in raw form.
          #    └─ Don't clear the screen after quitting less.
}