153 lines
4.1 KiB
Bash
153 lines
4.1 KiB
Bash
__usage() {
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if (($1 < $2)); then
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printf 'Usage: %s %s\n' "${FUNCNAME[1]}" "$3"
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return 0
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fi
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return 1
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}
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__isnumber() {
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[[ $1 == ?([+-])+([0-9])?([.,]+([0-9])) ]]
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}
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count() { # Counts the number of characters in a string
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__usage $# 1 '<string>' && return 1
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printf '%d\n' "${#1}"
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}
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trim() { # Trim leading and trailing whitespace
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__usage $# 1 '<string>' && return 1
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: "${1#"${1%%[![:space:]]*}"}"
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: "${_%"${_##*[![:space:]]}"}"
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printf '%s\n' "$_"
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}
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dtl() { # Deletes the top lines of a file
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__usage $# 2 '<file> <number>' && return 1
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(($2 == 0)) && return
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declare -a file
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mapfile -O "$2" -tn 0 file < "$1"
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printf '%s\n' "${file[@]}" > "$1"
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}
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dbl() { # Deletes the bottom lines of a file
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__usage $# 2 '<file> <number>' && return 1
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(($2 == 0)) && return
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declare -a file
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mapfile -tn 0 file < "$1"
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printf '%s\n' "${file[@]:0:$((${#file[@]}-$2))}" > "$1"
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}
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rot13() { # Encodes/Decodes string in rot13
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__usage $# 1 '<string>' && return 1
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tr 'A-Za-z' 'N-ZA-Mn-za-m' <<< "$1"
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}
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pictshare() { # Uploads image to pictshare
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__usage $# 1 '<file>' && return 1
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curl -SsX POST -F "postimage=@$1" \
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https://pictshare.net/backend.php | \
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awk 'BEGIN { FS="\"" } { gsub(/\\/,""); print $16 }'
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}
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transh() { # Uploads file to transfer.sh
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__usage $# 1 '<file> [max days] [name]' && return 1
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declare file
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if [ -n "${3// }" ]; then file="${3// /_}"
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else : "${1%/}"; : "${_##*/}"; file="${_// /%20}"; fi
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curl -Ss --upload-file "$1" -H "Max-Days: ${2:1}" \
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"https://transfer.sh/$file" && printf '\n'
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}
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svgmin() { # Minifies and formats svg for css
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__usage $# 2 '< -i FILE | -s STRING >' && return 1
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declare plugins randstr
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plugins="$(svgo --show-plugins | awk '
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BEGIN { printf "{" }
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/cleanup|remove/ { printf c $2; c="," }
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END { printf "}" }')"
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randstr=$(tr -cd '[:alnum:]' </dev/urandom | fold -w8 | head -1)
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svgo --enable="$plugins" "$@" --datauri=encoded -o "/tmp/$randstr.svg.b64"
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printf "'data:image/svg+xml;UTF8,%s'\\n" "$(<"/tmp/$randstr.svg.b64")"
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rm "/tmp/$randstr.svg.b64"
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}
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tempconv() { # Converts Fahrenheit to Celsius and vice versa
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__usage $# 2 '<c | f> <degree>' && return 1
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if ! __isnumber "$2"; then
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printf 'The second argument must be a number.\n' >&2
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return 1
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fi
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case "$1" in
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[Ff]) printf '%d \u02DAC\n' "$((($2 - 32) * 5 / 9))"; return ;;
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[Cc]) printf '%d \u02DAF\n' "$(($2 * 9 / 5 + 32))"; return ;;
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*) __usage 0 1 '<c | f> <degree>' && return 1
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esac
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}
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rgb2hex() { # Converts rgb colour to hex
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__usage $# 3 '<red> <green> <blue>' && return 1
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printf '#%02x%02x%02x\n' "$1" "$2" "$3"
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}
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hex2rgb() { # Converts hex colour to rgb
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__usage $# 1 '<hex>' && return 1
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declare r g b
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((r="16#${1:0:2}",g="16#${1:2:2}",b="16#${1:4:2}"))
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printf '%s\n' "$r $g $b"
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}
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shuffle() { # Shuffles letters in string
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__usage $# 1 '<string>' && return 1
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perl -MList::Util=shuffle -F'' \
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-lane 'print shuffle @F' <<< "$1"
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}
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cht() { # Searches cht.sh cheatsheet
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__usage $# 2 '<language> <query>' && return 1
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: "${*:2}"; curl -sS4 "cht.sh/$1/${_// /+})?Q"
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}
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weather() { # Show weather info from wttr.in
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__usage $# 1 '<place>' && return 1
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curl -sS4 "wttr.in/~${1}+${2:-Greece}" | head -n -1
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}
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sri() { # Prints the SRI hash of a resource
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__usage $# 1 '<URL> [algorithm]' && return 1
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declare sha
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sha="$(curl -Ss "$1" | shasum -b \
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-a "${2:-384}" - | xxd -r -p | base64)"
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printf 'sha%d-%s\n' "${2:-384}" "$sha"
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}
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myip() { # What's my ip
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dig +short myip.opendns.com @resolver1.opendns.com
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}
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urlencode() { # Encodes string for url
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__usage $# 1 '<string>' && return 1
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declare LANG=C len="${#1}" char i
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for ((i = 0; i < len; ++i)); do
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char="${1:i:1}"
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case $char in
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[a-zA-Z0-9.~_-]) printf '%s' "$char" ;;
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*) printf '%%%02X' "'$char" ;;
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esac
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done
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}
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urldecode() { # Decodes urlencoded string
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__usage $# 1 '<string>' && return 1
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printf '%b\n' "${*//%/\\x}"
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}
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utf8decode() { # Decodes =?UTF-8?B?...?= string
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__usage $# 1 '<string>' && return 1
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[[ $1 =~ ^=\?[Uu][Tt][Ff]-8\?[Bb]\?([^?]+)\?=$ ]]
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printf '%s\n' "$(base64 -d <<< "${BASH_REMATCH[1]}")"
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}
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# vim:set ft=sh fdm=syntax fdl=0:
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