notify.sh

#!/usr/bin/env bash
# notify.sh — Claude Code cross-platform desktop notification
# Supports: macOS (osascript / terminal-notifier), Linux (notify-send)
#
# Usage: notify.sh [info|success|warning|error]
#   Reads hook JSON from stdin, same as notify.ps1

set -euo pipefail

# ============================================================
#  Configuration
# ============================================================
ICON_DIR="$HOME/.claude"
ICON_PATH="$ICON_DIR/notify-icon.png"
APP_NAME="Claude Code"
NOTIFY_TYPE="${1:-info}"

# ============================================================
#  Module: JSON Parsing (jq optional, python fallback)
# ============================================================
json_get() {
  local json="$1" key="$2"
  if command -v jq &>/dev/null; then
    echo "$json" | jq -r ".$key // empty" 2>/dev/null || echo ""
    return
  fi
  # python fallback (stdin to avoid ARG_MAX)
  local py
  py=$(command -v python3 || command -v python || true)
  if [ -n "$py" ]; then
    echo "$json" | "$py" -c "import sys,json; d=json.load(sys.stdin); print(d.get(sys.argv[1],''))" "$key" 2>/dev/null || echo ""
    return
  fi
  # crude sed fallback
  echo "$json" | sed -n "s/.*\"$key\"[[:space:]]*:[[:space:]]*\"\\([^\"]*\\)\".*/\\1/p" | head -1 || echo ""
}

read_stdin() {
  cat
}

# ============================================================
#  Module: Context Detection
# ============================================================
get_project_name() {
  local cwd="$1"
  [ -z "$cwd" ] && return

  if command -v git &>/dev/null; then
    local git_root
    git_root=$(git -C "$cwd" rev-parse --show-toplevel 2>/dev/null || true)
    if [ -n "$git_root" ]; then
      local name branch
      name=$(basename "$git_root")
      branch=$(git -C "$cwd" branch --show-current 2>/dev/null || true)
      if [ -n "$branch" ]; then
        echo "$name [$branch]"
        return
      fi
      echo "$name"
      return
    fi
  fi

  # fallback: last two path segments
  echo "$cwd" | awk -F/ '{if(NF>=2) print $(NF-1)"/"$NF; else print $NF}'
}

get_terminal_identity() {
  if [ -n "${WT_SESSION:-}" ]; then echo "Windows Terminal"; return; fi
  case "${TERM_PROGRAM:-}" in
    vscode)    echo "VS Code";         return ;;
    WezTerm)   echo "WezTerm";        return ;;
    alacritty) echo "Alacritty";      return ;;
    iTerm.app) echo "iTerm2";         return ;;
    ghostty)   echo "Ghostty";        return ;;
  esac
  case "${TERM:-}" in
    xterm-kitty) echo "Kitty"; return ;;
  esac
  echo "Terminal"
}

build_label() {
  local project="$1" terminal="$2"
  local result=""
  [ -n "$project" ] && result="$project"
  [ -n "$terminal" ] && result="${result:+$result · }$terminal"
  echo "$result"
}

# ============================================================
#  Module: Type Configuration
# ============================================================
get_type_config() {
  case "$1" in
    success) echo "Done|✓|Default|Task completed" ;;
    warning) echo "Attention|⚠|IM|Claude needs your approval" ;;
    error)   echo "Error|✗|Reminder|An error occurred" ;;
    *)       echo "Idle|●|Default|Claude is waiting for your input" ;;
  esac
}

# ============================================================
#  Module: Platform Notification
# ============================================================
notify_macos() {
  local title="$1" message="$2" sound="$3"

  # Prefer terminal-notifier (supports custom icon)
  if command -v terminal-notifier &>/dev/null; then
    local icon_args=()
    [ -f "$ICON_PATH" ] && icon_args=(-appIcon "$ICON_PATH")
    terminal-notifier -title "$APP_NAME" -subtitle "$title" \
      -message "$message" "${icon_args[@]}" -sound default 2>/dev/null && return
  fi

  # Fallback: osascript
  local sound_name="default"
  case "$sound" in
    IM)      sound_name="Submarine" ;;
    Reminder) sound_name="Sosumi" ;;
  esac
  local safe_title="$title" safe_message="$message"
  safe_title="${safe_title//\\/\\\\}"; safe_title="${safe_title//\"/\\\"}"
  safe_message="${safe_message//\\/\\\\}"; safe_message="${safe_message//\"/\\\"}"
  osascript -e "display notification \"$safe_message\" with title \"$APP_NAME\" subtitle \"$safe_title\" sound name \"$sound_name\"" 2>/dev/null
}

notify_linux() {
  local title="$1" message="$2"

  if ! command -v notify-send &>/dev/null; then
    echo "[$title] $message"
    return
  fi

  local icon_args=()
  [ -f "$ICON_PATH" ] && icon_args=(-i "$ICON_PATH")

  local urgency="low"
  case "$NOTIFY_TYPE" in
    error)   urgency="critical" ;;
    warning) urgency="normal" ;;
  esac

  notify-send -u "$urgency" "${icon_args[@]}" "$title" "$message" 2>/dev/null
}

send_notification() {
  local title="$1" message="$2" sound="$3"
  case "$(uname -s)" in
    Darwin) notify_macos "$title" "$message" "$sound" ;;
    Linux)  notify_linux "$title" "$message" ;;
    *)      echo "[$title] $message" ;;
  esac
}

# ============================================================
#  Main
# ============================================================
main() {
  local stdin_data
  stdin_data=$(read_stdin)

  local cwd message
  cwd=$(json_get "$stdin_data" "cwd")
  message=$(json_get "$stdin_data" "message")
  [ -z "$cwd" ] && cwd="$PWD"

  local project terminal label
  project=$(get_project_name "$cwd")
  terminal=$(get_terminal_identity)
  label=$(build_label "$project" "$terminal")

  # Parse type config
  local type_config prefix emoji sound fallback
  type_config=$(get_type_config "$NOTIFY_TYPE")
  IFS='|' read -r prefix emoji sound fallback <<< "$type_config"

  # Build title & message
  local title
  if [ -n "$label" ]; then
    title="$emoji $prefix · $label"
  else
    title="$emoji $prefix"
  fi
  [ -z "$message" ] && message="$fallback"

  send_notification "$title" "$message" "$sound"
}

main