download_viewer.sh - download a JSON file using an API request (Doomworld in this case), then pretty print to JSON or YAML using JSON::XS, and pipe to vim for syntax highlighting. JSON output requires the 'json.vim' syntax highlighting scripts, located at: https://github.com/elzr/vim-json viewjson first added in https://github.com/spicyjack/publ…

download_viewer.sh

_download_viewer () {
    local OUTPUT_TYPE="$1"
    local WGET_URL="$2"
    JSON_XS_CMD=$(which json_xs)
    VIM_CMD=$(which vim)
    WGET_CMD=$(which wget)
    if [ ! -x $JSON_XS_CMD -o ! -x $VIM_CMD -o ! $WGET_CMD ]; then
        echo "ERROR: missing commands needed to run this function!"
        echo "JSON_XS_CMD: ${JSON_XS_CMD}"
        echo "VIM_CMD: ${VIM_CMD}"
        echo "WGET_CMD: ${WGET_CMD}"
        return 1
    fi
    if [ "x$1" == "x" ]; then
        echo 'Usage: viewjson "http://example.com/api/request.json"'
        echo "(Hint: quote URL to prevent shell from interpreting URL)"
        return 1
    else
        $WGET_CMD -O - "$WGET_URL" | $JSON_XS_CMD \
            | $VIM_CMD --cmd 'let no_plugin_maps = 1' \
            -c 'runtime! macros/less.vim' -c "set filetype=$OUTPUT_TYPE" -
    fi
    unset JSON_XS_CMD VIM_CMD WGET_CMD
     unset JSON_XS_CMD VIM_CMD WGET_CMD
} # view a downloaded file, pretty printed and syntax highlighted

viewjson () {
    _download_viewer "json" "$1"
} # json front end to _download_viewer

viewyaml () {
    _download_viewer "yaml" "$1"
} # yaml front end to _download_viewer