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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# 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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# From the specified files, rename the files containing a date
# in the filename to only the date in the following format:
#
#    <year>-<month>-<day> <hour>.<minute>.<second>
#
# Usage examples:
#
#  * rename-files-with-date-in-name path/to/some/directory path/to/some/file ...

rename-files-with-date-in-name() (

    rename_file() (
        filePath=$(dirname "${1%/}")
        fileName=$(basename "$1")

        # The following will do transformations such as:
        #
        #   * 20200505_050505.dng => 2020-05-05 05.05.05.dng
        #   * Screenshot 2020-01-02 at 03.04.05.png => 2020-01-02 03-04-05.jpg
        #   * Screenshot_20201010-101010_Something.jpg => 2020-10-10 10-10-10.jpg
        #   * signal-2020-05-06-07-08-09-123.mp4 => 2020-05-06 07-08-09.mp4

        newFilePath="${filePath}/$(printf "%s" "$fileName" | sed 's/[^0-9]*\([0-9]\{4\}\)[_-]\{0,1\}\([0-9]\{2\}\)[_-]\{0,1\}\([0-9]\{2\}\)[_-]\{0,1\}\( at \)\{0,1\}\([0-9]\{2\}\)[_.-]\{0,1\}\([0-9]\{2\}\)[_.-]\{0,1\}\([0-9]\{2\}\).*\(\..*\)$/\1-\2-\3 \5.\6.\7\8/')"

        if [ "$newFilePath" != "$1" ]; then
           mv -f "$1" "$newFilePath"
        fi
    )

    #                 ┌─ Default to the current directory.
    for filePath in "${@:-.}"; do
        if [ -d "$filePath" ]; then
            find "${filePath%/}" \
                -type f \
                -depth 1 \
                -print \
            | while read -r f; do
                rename_file "$f"
            done
        elif [ -f "$filePath" ]; then
            rename_file "$filePath"
        fi
    done

)

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# Resize image.
#
# Create a new image based on the specified image resized by the
# specified amount.
#
# $1: Path to the original image.
# $2: Resize value (default is 50%).
#     See also: https://imagemagick.org/script/command-line-processing.php#geometry
#
# Usage examples:
#
#   * resize-image ./path/to/image.jpg 30%
#   * resize-image ./path/to/image.jpg 1000x1000!

resize-image() {

    # 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 path="$(dirname "$1")"
    declare fileName="$(basename "$1")"
    declare geometry="${2:-50%}"

    convert \
        "$1" \
        -colorspace RGB \
        +sigmoidal-contrast 11.6933 \
        -define filter:filter=Sinc \
        -define filter:window=Jinc \
        -define filter:lobes=3 \
        -sigmoidal-contrast 11.6933 \
        -colorspace sRGB \
        -background transparent \
        -gravity center \
        -resize "$geometry" \
        +append \
        "$path/_$fileName" \
    && printf "* %s (%s)\n" \
            "$path/_$fileName" \
            "$geometry"

}

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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.
}