twnet: start working on helper cli script
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263
scripts/bin/twnet
Executable file
263
scripts/bin/twnet
Executable file
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#!/bin/bash
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FIELD_TYPES=(string str integer int raw)
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function show_help() {
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echo "usage: twnet [action] [options]"
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echo "options:"
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echo " --help | -h show this help"
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echo "actions:"
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echo " generate | g generate a ruby file. See $(tput bold)twnet g --help$(tput sgr0)"
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}
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function is_camel_case() {
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[[ "$1" =~ ^([A-Z][a-z]+)+$ ]] && return 0
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return 1
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}
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function is_snake_case() {
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[[ "$1" =~ ^[a-z][a-z_]*[a-z]$ ]] && return 0
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return 1
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}
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function split_camel_case() {
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local str="$1"
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local words=()
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local word=''
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while read -n1 -r c
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do
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if [[ "$c" =~ [A-Z] ]]
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then
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if [ "$word" != "" ]
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then
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words+=("${word,}")
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word=''
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fi
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fi
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word+="$c"
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done < <(echo -n "$str")
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if [ "$word" != "" ]
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then
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words+=("${word,}")
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word=''
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fi
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echo "${words[*]}"
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}
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function split_snake_case() {
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local str="$1"
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local words=()
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local word=''
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while read -n1 -r c
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do
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if [[ "$c" == '_' ]]
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then
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if [ "$word" != "" ]
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then
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words+=("${word,}")
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word=''
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fi
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else
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word+="$c"
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fi
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done < <(echo -n "$str")
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if [ "$word" != "" ]
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then
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words+=("${word,}")
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word=''
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fi
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echo "${words[*]}"
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}
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function camel_to_snake_case() {
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local camel="$1"
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local w
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local snake=''
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for w in $(split_camel_case "$camel")
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do
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snake+="_$w"
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done
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echo "${snake:1}"
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}
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function snake_to_camel_case() {
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local snake="$1"
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local w
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local camel=''
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for w in $(split_snake_case "$snake")
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do
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camel+="${w^}"
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done
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echo "$camel"
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}
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function action_generate_help() {
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echo "usage: twnet generate <type> <name> [fields..]"
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echo "options:"
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echo " --help | -h show this help"
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echo "type:"
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echo " server_packet | srv_pck | sp packet sent from server to client"
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echo " client_packet | cl_pck | cp packet sent from client to server"
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echo "name:"
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echo " will be the packet name use UpperCamelCase"
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echo " for example ClSay"
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echo "fields:"
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echo " the formate is field_name:field_type"
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echo " the allowed types are: ${FIELD_TYPES[*]}"
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echo " examples:"
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echo " target_id:int"
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echo " message:str"
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echo "examples:"
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echo " generate a cl_say.rb file describing a packet that"
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echo " is sent from the client to the server has the class name ClSay"
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echo " and two fields first target_id (integer) then message (string)"
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echo ""
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tput bold
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echo " twnet generate cp ClSay target_id:int message:str"
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tput sgr0
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}
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function action_generate() {
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local arg
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local arg_type=''
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local arg_name=''
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local field_name
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local field_type
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local fields
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local valid_type
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declare -A fields
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if [ "$#" -eq "0" ]
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then
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action_generate_help
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exit 1
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fi
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while true
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do
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[[ "$#" -eq "0" ]] && break
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arg="$1"
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shift
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if [ "${arg::1}" == "-" ]
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then
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if [ "$arg" == "--help" ] || [ "$arg" == "-h" ]
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then
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action_generate_help
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exit 0
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fi
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else
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if [ "$arg_type" == "" ]
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then
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arg_type="$arg"
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elif [ "$arg_name" == "" ]
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then
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arg_name="$arg"
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# tried to be smart with regex and failed
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# if [[ "$arg_name" =~ ([A-Z][a-z]*)+ ]]
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# then
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# for b in "${BASH_REMATCH[@]}"
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# do
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# echo "b: $b"
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# done
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# else
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# echo "Error: name '$arg_name' has to be UpperCamelCase"
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# exit 1
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# fi
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if ! is_camel_case "$arg_name"
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then
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echo "Error: name '$arg_name' has to be UpperCamelCase"
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exit 1
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fi
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# local w
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# for w in $(split_camel_case "$arg_name")
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# do
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# echo "w: $w"
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# done
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elif [[ "$arg" =~ (.*):(.*) ]]
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then
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field_name="${BASH_REMATCH[1]}"
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field_type="${BASH_REMATCH[2]}"
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fields["$field_name"]="$field_type"
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local valid=0
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for valid_type in "${FIELD_TYPES[@]}"
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do
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if [ "$valid_type" == "$field_type" ]
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then
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valid=1
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break
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fi
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done
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if [ "$valid" == "0" ]
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then
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echo "Error: '$field_type' is not a valid field type"
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echo " valid types are: ${FIELD_TYPES[*]}"
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exit 1
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fi
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if ! is_snake_case "$field_name"
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then
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echo "Error: '$field_name' is not a valid field name"
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echo " field names have to be lower_snake_case"
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exit 1
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fi
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else
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echo "Error: unkown argument '$arg' try $(tput bold)twnet g --help$(tput sgr0)"
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exit 1
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fi
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fi
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done
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if [ "$arg_type" == "" ]
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then
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echo "Error: type can not be empty $(tput bold)twnet g --help$(tput sgr0)"
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exit 1
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fi
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if [ "$arg_name" == "" ]
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then
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echo "Error: name can not be empty $(tput bold)twnet g --help$(tput sgr0)"
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exit 1
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fi
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for field_name in "${!fields[@]}"
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do
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field_type="${fields[$field_name]}"
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# echo "field"
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# echo " name: $field_name"
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# echo " type: $field_type"
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done
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}
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function parse_args() {
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local arg
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while true
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do
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[[ "$#" -eq "0" ]] && break
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arg="$1"
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shift
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if [ "${arg::1}" == "-" ]
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then
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if [ "$arg" == "--help" ] || [ "$arg" == "-h" ]
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then
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show_help
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exit 0
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fi
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else
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if [ "$arg" == "generate" ] || [ "$arg" == "g" ]
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then
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action_generate "$@"
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exit
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else
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echo "Error: unkown action '$arg'"
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exit 1
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fi
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fi
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done
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}
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if [ "$#" -eq "0" ]
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then
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show_help
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exit 1
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fi
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parse_args "$@"
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