fairplaysk/datacamp

#!/bin/bash
#
# Datacamp API Tool
#
# Type: datacamp -h for more information

DATACAMP_BASE_URL=${DATACAMP_BASE_URL:-http://localhost:3000}
DATACAMP_GET_METHOD=${DATACAMP_GET_METHOD:-curl}

function datacamp_request_url() {
    METHOD=$1
    shift

    if [ "${DATACAMP_FORMAT}x" != "x" ]; then
        METHOD="${METHOD}.${DATACAMP_FORMAT}"
    fi

    ARGS="api_key=${DATACAMP_API_KEY}"

    if [ $# -gt 0 ]; then
        while [ $# -gt 0 ]; do
            ARG="$1"
            shift
            ARGS="${ARGS}&${ARG}"
        done
    fi

    CALL_URL="${DATACAMP_BASE_URL}/api/${METHOD}"
    if [ "$ARGS" != "" ]; then
        URL="${CALL_URL}?${ARGS}"
    else
        URL="${CALL_URL}"
    fi
    echo $URL
}

function datacamp_request() {
    URL="$(datacamp_request_url $*)"
    
    # FIXME: implement wget
    
    case $DATACAMP_GET_METHOD in
    curl)
        COMMAND="curl";;
    wget)
        COMMAND="wget -q -O - ";;
    *)
        echo "ERROR: Unknown get method ${DATACAMP_GET_METHOD}" >&2
        exit 1;;
    esac

    echo REQUEST: $URL >&2
    $COMMAND $URL
       
}
function print_help() {
    cat  >&2 << EOF
Usage: $0 [-h] [OPTIONS] REQUEST [ARGUMENTS]
Send REQUEST to a Datacamp application and return server reply.
Options:
  -b url          specify base URL for Datacamp. Default: http://localhost:3000
  -k api_key      specify API key for accessing Datacamp data
  -f format       request different format, if available. Options are: xml
  -g get_method   method of accessing the datacamp: curl (default), wget

Environment variables:
  DATACAMP_BASE_URL
  DATACAMP_API_KEY
  DATACAMP_FORMAT
  DATACAMP_GET_METHOD
    
Example:
  $0 version
  $0 datasets
EOF
}

while getopts k:m:f:h o
do case "$o" in
    b)  DATACAMP_BASE_URL="$OPTARG";;
    k)  DATACAMP_API_KEY="$OPTARG";;
    f)  DATACAMP_FORMAT="$OPTARG";;
    m)  DATACAMP_GET_METHOD="$OPTARG";;
    h | *)  print_help
        exit 1;;
    v)  verbose="yes";;
esac
done
shift $(($OPTIND - 1))

if [ $# -eq 0 ]; then
    echo "No API method spicified. Use $0 -h for more information." >&2
    exit 1
fi

datacamp_request $@