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🔎 Writes script for searching web from command line
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Alicia Sykes
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187
utils/web-search.sh
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187
utils/web-search.sh
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#!/bin/bash
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# Bash functions for launching a web search
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# Licensed under MIT, (C) Alicia Sykes 2022
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# URL encodes the users search string
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ws_url_encode() {
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local length="${#1}"
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for i in $(seq 0 $((length-1))); do
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local c="${1:$i:1}"
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case $c in
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[a-zA-Z0-9.~_-]) printf '%s' "$c" ;;
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*) printf '%%%02X' "'$c" ;;
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esac
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done
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}
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# Determines which opening method/ browser to use, and opens URL
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ws_launch_url() {
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command_exists () {
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hash "$1" 2> /dev/null
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}
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if [[ $OSTYPE == 'darwin'* ]]; then
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open $1
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elif command_exists xdg-open; then
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xdg-open $1
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elif command_exists lynx; then
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lynx -vikeys -accept_all_cookies $1
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elif command_exists browsh; then
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browsh $1
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elif command_exists links2; then
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links2 -g $1
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elif command_exists links; then
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links $1
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else
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echo -e "\033[0;33mUnable to launch browser, open manually instead"
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echo -e "\033[1;96m🌐 URL: \033[0;96m\e[4m$1\e[0m"
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return;
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fi
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}
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# Combines URL with encoded search term. Prompts user if search term missing
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ws_make_search() {
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search_term=${@:2}
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if [ -z $1 ]; then # Check first parameter is present
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echo -e "\033[0;93mError, no search engine URL provided\e[0m"
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web_search
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return
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fi
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if [ -z $2 ]; then # Check second parameter, prompt user if missing
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echo "Enter Search Term: "
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read search_term
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fi
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# Encode search term, append to URL, and call launch function
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search_term=$(ws_url_encode $search_term)
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web_address="$1$search_term"
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ws_launch_url $web_address
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}
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# Functions that call make search, with search engines URL
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ws_duckduckgo() {
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ws_make_search 'https://duckduckgo.com/?q=' $@
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}
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ws_wikipedia() {
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ws_make_search 'https://en.wikipedia.org/w/index.php?search=' $@
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}
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ws_google() {
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ws_make_search 'https://www.google.com/search?q=' $@
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}
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ws_github() {
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ws_make_search 'https://github.com/search?q=' $@
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}
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ws_stackoverflow() {
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ws_make_search 'https://stackoverflow.com/search?q=' $@
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}
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ws_wolframalpha() {
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ws_make_search 'https://www.wolframalpha.com/input?i=' $@
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}
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ws_reddit() {
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ws_make_search 'https://www.reddit.com/search/?q=' $@
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}
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ws_maps() {
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ws_make_search 'https://www.google.com/maps/search/' $@
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}
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# Lists availible search options
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web_search() {
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# If help flag specified, show help
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[[ $@ == *"--help"* || $@ == "help" ]] && show_ws_help && return
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# If user specified search engine, jump strait to that function
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if [ -n "${1+set}" ]; then
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[[ $@ == "duckduckgo"* ]] && ws_duckduckgo "${@/duckduckgo/}" && return
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[[ $@ == "wikipedia"* ]] && ws_wikipedia "${@/wikipedia/}" && return
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[[ $@ == "github"* ]] && ws_github "${@/github/}" && return
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[[ $@ == "stackoverflow"* ]] && ws_stackoverflow "${@/stackoverflow/}" && return
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[[ $@ == "wolframalpha"* ]] && ws_wolframalpha "${@/wolframalpha/}" && return
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[[ $@ == "reddit"* ]] && ws_reddit "${@/reddit/}" && return
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[[ $@ == "maps"* ]] && ws_maps "${@/maps/}" && return
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[[ $@ == "google"* ]] && ws_google "${@/google/}" && return
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fi
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# Otherwise show menu input for search engines
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choices=(
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duckduckgo wikipedia google github stackoverflow
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wolframalpha reddit maps 'help' quit
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)
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PS3='❯ '
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echo -e "\033[1;95mSelect a Search Option\033[0;35m"
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select opt in ${choices[@]}; do
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case $opt in
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duckduckgo) ws_duckduckgo $@; return;;
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wikipedia) ws_wikipedia $@; return;;
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google) ws_google $@; return;;
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github) ws_github $@; return;;
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stackoverflow) ws_stackoverflow $@; return;;
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wolframalpha) ws_wolframalpha $@; return;;
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reddit) ws_reddit $@; return;;
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maps) ws_maps $@; return;;
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help) show_ws_help;;
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quit) break ;;
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*)
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echo -e "\033[0;93mInvalid option: '$REPLY'\e[0m"
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echo -e "\033[0;33mEnter the number corresponding to one of the above options\e[0m"
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;;
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esac
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done
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}
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# Set up some shorthand aliases
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alias web-search='web_search'
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alias wsddg='ws_duckduckgo'
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alias wswiki='ws_wikipedia'
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alias wsgh='ws_github'
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alias wsso='ws_stackoverflow'
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alias wswa='ws_wolframalpha'
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alias wsrdt='ws_reddit'
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alias wsmap='ws_maps'
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alias wsggl='ws_google'
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# Set ws alias, only if not used by another program
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if ! hash ws 2> /dev/null; then
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alias ws='web_search'
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fi
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# Prints usage options
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show_ws_help() {
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echo -e '\033[1;95mCLI Web Search\e[0m'
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echo -e '\033[0;95m\e[3mA set of functions for searching the web from the command line.\e[0m'
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echo
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echo -e '\033[0;95m\e[4mExample Usage:\033[0;35m'
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echo -e ' (1) View menu, select search engine by index, then enter a search term'
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echo -e ' $ web-search'
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echo -e ' (2) Enter a search term, and be prompted for which search engine to use'
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echo -e ' $ web-search Hello World!'
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echo -e ' (3) Enter a search engine followed by search term'
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echo -e ' $ web-search wikipedia Matrix Defense'
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echo -e ' (4) Enter a search engine, and be prompted for the search term'
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echo -e ' $ web-search duckduckgo'
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echo
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echo -e '\033[0;95m\e[4mShorthand\033[0;35m'
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echo -e ' You can also use the `ws` alias instead of typing `web-search`'
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echo
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echo -e '\033[0;95m\e[4mSupported Search Engines:\033[0;35m'
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echo -e ' \033[0;35mDuckDuckGo: \e[3m$ ws duckduckgo (or $ wsddg)\e[0m'
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echo -e ' \033[0;35mWikipedia: \e[3m$ ws wikipedia or ($ wswiki)\e[0m'
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echo -e ' \033[0;35mGitHub: \e[3m$ ws github or ($ wsgh)\e[0m'
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echo -e ' \033[0;35mStackOverflow: \e[3m$ ws stackoverflow or ($ wsso)\e[0m'
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echo -e ' \033[0;35mWolframalpha: \e[3m$ ws wolframalpha or ($ wswa)\e[0m'
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echo -e ' \033[0;35mReddit: \e[3m$ ws reddit or ($ wsrdt)\e[0m'
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echo -e ' \033[0;35mMaps: \e[3m$ ws maps or ($ wsmap)\e[0m'
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echo -e ' \033[0;35mGoogle: \e[3m$ ws google or ($ wsggl)\e[0m'
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echo -e '\e[0m'
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}
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# Determine if file is being run directly or sourced
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([[ -n $ZSH_EVAL_CONTEXT && $ZSH_EVAL_CONTEXT =~ :file$ ]] ||
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[[ -n $KSH_VERSION && $(cd "$(dirname -- "$0")" &&
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printf '%s' "${PWD%/}/")$(basename -- "$0") != "${.sh.file}" ]] ||
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[[ -n $BASH_VERSION ]] && (return 0 2>/dev/null)) && sourced=1 || sourced=0
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# If running directly, then show menu, or help
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if [ $sourced -eq 0 ]; then
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if [[ $@ == *"--help"* ]]; then
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show_ws_help
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else
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web_search "$@"
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fi
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fi
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