From 894119b31ae93c97f5e4841f30305d26342616df Mon Sep 17 00:00:00 2001
From: Robert Reed <robert.mc.reed@gmail.com>
Date: Sat, 21 Aug 2021 22:12:15 -0700
Subject: feat: holy bash spaghetti

---
 dactyl.sh | 576 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 576 insertions(+)
 create mode 100755 dactyl.sh

diff --git a/dactyl.sh b/dactyl.sh
new file mode 100755
index 0000000..88e294f
--- /dev/null
+++ b/dactyl.sh
@@ -0,0 +1,576 @@
+#!/bin/bash
+
+#                   *******************                   #
+# *******************      setup      ******************* #
+#                   *******************                   #
+
+# exit if any errors are thrown
+set -e
+
+container=""
+shellContainer=DM-shell
+configContainer=DM-config
+modelContainer=DM-model
+imageName=dactyl-keyboard
+srcBind="$(pwd)/src:/app/src"
+thingsBind="$(pwd)/things:/app/things"
+
+# force exit on interrupt in case we are in a menu
+function catch_interrupt() { exit 1; }
+trap catch_interrupt SIGINT
+trap catch_interrupt SIGTSTP
+
+#                   *******************                   #
+# *******************    functions    ******************* #
+#                   *******************                   #
+
+################################
+# General Helpers
+################################
+
+function inform() {
+  echo -e "\n[INFO] $@\n"
+}
+
+function warn() {
+  echo -e "\n[WARN] $@\n"
+}
+
+function error() {
+  echo -e "\n[ERROR] $@\n"
+}
+
+function exitUnexpectedPositionalArgs() {
+  error "Unexpected positionnal argument.\n\n\tAlready had: $positional\n\n\tAnd then got: $1"
+  exit 1
+}
+
+function exitUnexpectedFlags() {
+  error "One or more flags are invalid:\n\n\tPositional: $positional\n\n\tFlags: $flags"
+  exit 1
+}
+
+################################
+# Interactive Menu
+################################
+
+# https://unix.stackexchange.com/questions/146570/arrow-key-enter-menu
+#  Arguments:
+#    array of options
+#
+#  Return value:
+#    selected index (0 for opt1, 1 for opt2 ...)
+
+function menu {
+  printf "\n[Dactyl Manuform] Please choose an option:\n\n"
+	options=("$@")
+
+	# helpers for terminal print control and key input
+	ESC=$(printf "\033")
+	cursor_blink_on()	{ printf "$ESC[?25h"; }
+	cursor_blink_off()	{ printf "$ESC[?25l"; }
+	cursor_to()			{ printf "$ESC[$1;${2:-1}H"; }
+	print_option()		{ printf "\t   $1 "; }
+	print_selected()	{ printf "\t${COLOR_GREEN}  $ESC[7m $1 $ESC[27m${NC}"; }
+	get_cursor_row()	{ IFS=';' read -sdR -p $'\E[6n' ROW COL; echo ${ROW#*[}; }
+  key_input() {
+    local key
+    ESC=$(printf "\033")
+
+    # read 3 characters, 1 at a time
+    for (( i=0; i < 3; ++i)); do
+      read -s -n1 input 2>/dev/null >&2
+      # concatenate chars together
+      key+="$input"
+      # if a number is encountered, echo it back
+      if [[ $input =~ ^[1-9]$ ]]; then
+        echo $input; return;
+      # if enter, early return
+      elif [[ $input = "" ]]; then
+        echo enter; return;
+      # if we encounter something other than [1-9] or "" or the escape sequence
+      # then consider it an invalid input and exit without echoing back
+      elif [[ ! $input = $ESC && i -eq 0 ]]; then
+        return
+      fi
+    done
+
+    if [[ $key = $ESC[A ]]; then echo up; fi;
+    if [[ $key = $ESC[B ]]; then echo down; fi;
+  }
+
+	# initially print empty new lines (scroll down if at bottom of screen)
+	for opt in "${options[@]}"; do printf "\n"; done
+
+	# determine current screen position for overwriting the options
+	local lastrow=`get_cursor_row`
+	local startrow=$(($lastrow - $#))
+
+	# ensure cursor and input echoing back on upon a ctrl+c during read -s
+	trap "cursor_blink_on; stty echo; printf '\n'; exit" 2
+	cursor_blink_off
+
+	local selected=0
+
+  # print options by overwriting the last lines
+  function drawOptions() {
+    local idx=0
+    for opt in "${options[@]}"; do
+      cursor_to $(($startrow + $idx))
+      # add an index to the option
+      local label="$(($idx + 1)). $opt"
+      if [ $idx -eq $selected ]; then
+        print_selected "$label"
+      else
+        print_option "$label"
+      fi
+      ((idx++))
+    done
+  }
+
+	while true; do
+		drawOptions
+
+		# user key control
+    input=$(key_input)
+
+		case $input in
+			enter) break;;
+      [1-9])
+        # If a digit is encountered, consider it a selection (if within range)
+        if [ $input -lt $(($# + 1)) ]; then
+          selected=$(($input - 1))
+          drawOptions
+          break
+        fi
+        ;;
+			up)	((selected--));
+					if [ $selected -lt 0 ]; then selected=$(($# - 1)); fi;;
+			down)  ((selected++));
+					if [ $selected -ge $# ]; then selected=0; fi;;
+		esac
+	done
+
+	# cursor position back to normal
+	cursor_to $lastrow
+	cursor_blink_on
+	echo
+
+	return $selected
+}
+
+
+################################
+# Setup helpers
+################################
+
+function showHelpAndExit() {
+  echo "TODO: Help Menu"
+  exit
+}
+
+# error on any unexpected flags or more than one positional argument
+function processArgs() {
+  while [[ $# -gt 0 ]]
+    do
+      key="$1"
+
+      case $key in
+        --build|-rm|--remove|--inspect|--run|--start|--stop)
+          if [[ $flags ]]; then
+            flags+=" $key"
+          else
+            flags=$key
+          fi
+          shift;;
+        -h|--help)
+          showHelpAndExit
+          ;;
+        *)
+          # all valid flags should have already been captured above
+          if [[ $key == -* ]]; then
+            error "Unknwon flag: $key"
+            exit 1
+          # if we already have a positional argument we shouldn't get another
+          elif [[ "$positional" ]]; then
+            exitUnexpectedPositionalArgs $key
+            exit 1
+          # the totality of accepted positional arguments
+          elif [[ "$key" =~ ^(image|shell|config|model)$ ]]; then
+            positional="$key"
+            if [[ ! $key = image ]]; then
+              key+="Container"
+              container=$(echo "${!key}")
+            fi
+            shift
+          else
+            error "Unknown positional arg: \"$key\""
+            exit 1
+          fi
+          ;;
+      esac
+    done
+}
+
+# installing docker is out of scope
+# so if it isn't found, inform user and exit
+function checkDocker() {
+  if ! which docker &> /dev/null; then
+    error "Docker is not installed.\n\n\tPlease visit https://www.docker.com/products/docker-desktop for more information."
+    exit 1
+  fi
+}
+
+# exit unless user responds with yes
+function confirmContinue() {
+  while true; do
+    read -p "$@ [y/n]" yn
+    case $yn in
+        [Yy]* ) break;;
+        [Nn]* ) exit 0;;
+        * ) error "Please answer yes or no.";;
+    esac
+  done
+}
+
+################################
+# Image Logic
+################################
+
+function imageExists() {
+  docker image list | grep "$imageName" &> /dev/null
+}
+
+function buildImage() {
+  inform "Building docker image: $imageName..."
+  docker build -t dactyl-keyboard -f docker/Dockerfile .
+}
+
+function promptBuildImageIfNotExists() {
+  if ! imageExists; then
+    inform "Docker image not found: $imageName"
+    confirmContinue "Would you like to build it now?"
+    buildImage
+  fi
+}
+
+# image will always exist if we are here
+function handleRebuildImage() {
+  warn "Docker image already exists: $imageName"
+  confirmContinue "Would you like to overwrite it?"
+  buildImage
+}
+
+function handleRemoveImage() {
+  warn "This will remove docker image: $imageName"
+  confirmContinue "Would you like to continue?"
+  inform "Removing docker image: $imageName..."
+  docker image rm $imageName
+}
+
+function handleInspectImage() {
+  inform "Checking status of image: $imageName"
+  docker image inspect $imageName
+}
+
+function handleImageMenu() {
+  local check="Check Image Status"
+  local build="Reuild Image"
+  local remove="Remove Image"
+  local end="Exit"
+  options=("$check" "$build" "$remove" "$end")
+  # execute in subshell so exit code doesn't exit the script
+  (menu "${options[@]}") && true
+  result="${options[$?]}"
+
+  case $result in
+    $check) handleInspectImage;;
+    $build) handleRebuildImage;;
+    $remove) handleRemoveImage;;
+    *) exit;;
+  esac
+}
+
+# if we made it this far, image is confirmed to exist
+function handleImageCLI() {
+  if [[ ! "$flags" ]]; then
+    handleImageMenu
+  elif [[ "$flags" =~ ^.*(--inspect).*$ ]]; then
+    handleInspectImage
+  elif [[ "$flags" =~ ^.*(--build).*$ ]]; then
+    handleRebuildImage
+  elif [[ "$flags" =~ ^.*(--remove|-rm).*$ ]]; then
+    handleRemoveImage
+  else
+    exitUnexpectedFlags
+  fi
+}
+
+################################
+# Container Helpers
+################################
+
+function containerExists() {
+  docker container list -a | grep "$container" &> /dev/null
+}
+
+function containerIsRunning() {
+  if ! containerExists "$container"; then
+    return 1
+  fi
+
+  docker container inspect $container | grep '"Status": "running",' &> /dev/null
+}
+
+function isShell() {
+  test $container = $shellContainer
+}
+
+function promptIfShell() {
+  if isShell; then
+    promptStartShellSession
+  fi
+}
+
+function buildContainerAndExecutePythonScript() {
+  docker run --name $container -d -v "$srcBind" -v "$thingsBind" $imageName python3 -i $1
+}
+
+function buildContainer() {
+  inform "Building docker container: $container..."
+  case $container in
+    $shellContainer)
+      docker run --name $shellContainer -d -p 8000:8000 -it -v "$srcBind" -v "$thingsBind" $imageName
+      ;;
+    $modelContainer)
+      buildContainerAndExecutePythonScript dactyl_manuform.py
+      ;;
+    $configContainer)
+      buildContainerAndExecutePythonScript generate_configuration.py
+      ;;
+    *)
+      error "Unexpected exception. Containier: $container"
+      exit 1;;
+  esac
+  echo
+}
+
+function buildContainerIfNotExists() {
+  if ! containerExists; then
+    warn "Container not found: $container"
+    confirmContinue "Would you like to build it now?"
+    buildContainer
+  fi
+}
+
+function startContainer() {
+  docker container start $container &> /dev/null
+}
+
+function promptStartContainerIfNotRunning() {
+  buildContainerIfNotExists
+  if ! containerIsRunning; then
+    warn "Container is not running: $container"
+    confirmContinue "Would you like to start it now?"
+    startContainer
+  fi
+}
+
+function startContainerIfNotRunning() {
+  buildContainerIfNotExists
+  if ! containerIsRunning; then
+    inform "Starting docker container: $container"
+    startContainer
+  fi
+}
+
+function startContainerOrAlert() {
+  if containerIsRunning; then
+    inform "Container is already running: $shellContainer"
+  else
+    startContainerIfNotRunning
+  fi
+
+  if isShell; then
+    promptStartShellSession
+  fi
+}
+
+function stopContainer() {
+  if containerIsRunning; then
+    inform "Stopping docker container: $container..."
+    docker container stop $container &> /dev/null
+    docker container wait $container &> /dev/null
+  fi
+}
+
+function handleStopContainer() {
+  if ! containerExists; then
+    warn "Docker container does not exist: $container"
+  elif ! containerIsRunning; then
+    inform "Container is already stopped: $container"
+  else
+    stopContainer
+  fi
+}
+
+function removeContainer() {
+  if containerExists; then
+    stopContainer
+    inform "Removing docker container: $container..."
+    docker container rm $container &> /dev/null
+  fi
+}
+
+function inspectContainer() {
+  if ! containerExists; then
+    inform "Container \"$container\" does not exist."
+    confirmContinue "Would you like to build it?"
+    buildContainer
+  fi
+
+  docker container inspect $container
+}
+
+function handleBuildContainer() {
+  if containerExists; then
+    warn "Container already exists: $container"
+    confirmContinue "Would you like to overwrite it?"
+    removeContainer
+  fi
+
+  buildContainer
+  promptIfShell
+}
+
+function handleContainerMenu() {
+  local build="Rebuild $container Container"
+  local start="Start $container Container"
+  local stop="Stop $container Container"
+  local remove="Remove $container Container"
+  local inspect="Inspect $container Container"
+  local run="Start $container Session"
+  local main="Main Menu"
+  local end="Exit"
+
+  if ! containerExists; then
+    build="Build $container Container"
+    options=("$build" "$main" "$end")
+  elif containerIsRunning; then
+    options=("$run" "$inspect" "$build" "$stop" "$remove" "$main" "$end")
+    if ! isShell; then
+      unset options[0]
+    fi
+  else
+    options=("$inspect" "$build" "$start" "$remove" "$main" "$end")
+  fi
+  
+  # execute in subshell so exit code doesn't exit the script
+  (menu "${options[@]}") && true
+  result="${options[$?]}"
+
+  case $result in
+    $build) handleBuildContainer;;
+    $start) startContainerOrAlert;;
+    $stop) handleStopContainer;;
+    $remove) removeContainer;;
+    $inspect) inspectContainer;;
+    $main) handleMainMenu;;
+    *) 
+      if isShell && [[ $run = $result ]]; then
+        startShellSession
+      fi
+      exit
+      ;;
+  esac
+}
+
+function handleContainerCLI() {
+  if [[ ! "$flags" ]]; then
+    handleContainerMenu
+  elif [[ "$flags" =~ ^.*(--inspect).*$ ]]; then
+    inspectContainer
+  elif [[ "$flags" =~ ^.*(--build).*$ ]]; then
+    handleBuildContainer
+  elif [[ "$flags" =~ ^.*(--run).*$ ]] && isShell; then
+    startShellSession
+  elif [[ "$flags" =~ ^.*(--start).*$ ]]; then
+    startContainerOrAlert
+  elif [[ "$flags" =~ ^.*(--stop).*$ ]]; then
+    handleStopContainer
+  elif [[ "$flags" =~ ^.*(--remove|-rm).*$ ]]; then
+    removeContainer
+  else
+    exitUnexpectedFlags
+  fi
+}
+
+################################
+# Shell Specific Logic
+################################
+
+function startShellSession() {
+  promptStartContainerIfNotRunning
+  inform "Starting session in container: $shellContainer\n\n\tType \"exit\" to terminate the session."
+  docker exec -it $shellContainer /bin/bash
+}
+
+function promptStartShellSession() {
+  confirmContinue "Would you like to start a shell session?"
+  startShellSession
+}
+
+################################
+# Main Menu Logic
+################################
+
+function handleMainMenu() {
+  container=""
+
+  local imageOpt="Manage Docker Image"
+  local shellOpt="$shellContainer Options"
+  local configOpt="$configContainer Options"
+  local modelOpt="$modelContainer Options"
+  local end="Exit"
+
+  options=("$imageOpt" "$shellOpt" "$configOpt" "$modelOpt" "$end")
+  
+  # execute in subshell so exit code doesn't exit the script
+  (menu "${options[@]}") && true
+  result="${options[$?]}"
+
+  case $result in
+    $imageOpt ) handleImageMenu;;
+    $shellOpt|$configOpt|$modelOpt)
+      # remove " Options" and set as currentn container
+      container=$(echo "${result/ Options/}")
+      handleContainerMenu
+      ;;
+    * ) exit;;
+  esac
+}
+
+#                   *******************                   #
+# *******************      main       ******************* #
+#                   *******************                   #
+
+# figure out why we're running the script
+processArgs $@
+
+# exit if `docker` command not available
+checkDocker
+
+# make sure the base image has been built
+promptBuildImageIfNotExists
+
+# main switchboard to act depending on which positionl arg was passed
+
+if [[ "$positional" ]]; then
+  case $positional in
+    image ) handleImageCLI;;
+    shell|config|model ) handleContainerCLI;;
+    * ) exitUnexpectedPositionalArgs;;
+  esac
+else
+  handleMainMenu
+fi
-- 
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