feat: implement notification color swatch and dependency verification

color-tool

@@ -45,6 +45,7 @@ desktop_name=0
 desktop_notify=1
 desktop_copy=1
 desktop_output="hex"
+desktop_swatch=0
 
 # Track which settings were explicitly set via CLI flags to ensure they override config
 cli_json=""
@@ -242,6 +243,7 @@ load_config() {
       desktop:alpha) [[ "$val" == "true" ]] && desktop_alpha=1 || desktop_alpha=0 ;;
       desktop:name) [[ "$val" == "true" ]] && desktop_name=1 || desktop_name=0 ;;
       desktop:notify) [[ "$val" == "true" ]] && desktop_notify=1 || desktop_notify=0 ;;
+      desktop:swatch) [[ "$val" == "true" ]] && desktop_swatch=1 || desktop_swatch=0 ;;
       desktop:copy) [[ "$val" == "true" ]] && desktop_copy=1 || desktop_copy=0 ;;
       desktop:output) desktop_output="$val" ;;
       esac
@@ -272,6 +274,7 @@ json   = false  # copy JSON format instead of plain text
 name   = false  # fetch color name (requires network)
 copy   = true   # copy result to clipboard
 notify = true   # show desktop notification with the copied value
+swatch = false  # show color swatch in notification
 EOF
 }
 
@@ -319,7 +322,7 @@ show_help() {
 
   printf "  ${bold}${yellow}Config${reset}  ${dim}~/.config/color-tool/config.toml${reset}\n"
   printf "  ${dim}[defaults]${reset} keys: ${cyan}output json swatch name copy pick notify${reset}\n"
-  printf "  ${dim}[desktop]${reset}  keys: ${cyan}output json name notify copy${reset}  ${dim}(pick always on)${reset}\n\n"
+  printf "  ${dim}[desktop]${reset}  keys: ${cyan}output json name notify copy swatch${reset}  ${dim}(pick always on)${reset}\n\n"
 }
 
 # ── Environment detection ─────────────────────────────────────────────────────
@@ -353,8 +356,24 @@ copy_to_clipboard() {
 
 notify_result() {
   local value="$1"
+  local hex_color="${2:-}"
   command -v notify-send &>/dev/null || return 0
-  notify-send -i "color-picker" "color-tool" "$value" || true
+
+  local icon_name="color-picker"
+  if [[ $swatch_mode -eq 1 && -n "$hex_color" ]]; then
+    local swatch_path="/tmp/color_swatch_${hex_color//\#/}.png"
+    if command -v magick >/dev/null 2>&1; then
+      if magick -size 64x64 xc:"$hex_color" "$swatch_path" 2>/dev/null; then
+        icon_name="$swatch_path"
+      fi
+    elif command -v convert >/dev/null 2>&1; then
+      if convert -size 64x64 xc:"$hex_color" "$swatch_path" 2>/dev/null; then
+        icon_name="$swatch_path"
+      fi
+    fi
+  fi
+
+  notify-send -i "$icon_name" "color-tool" "$value" || true
 }
 
 notify_error() {
@@ -448,6 +467,60 @@ suggest_path_add() {
   fi
 }
 
+check_dependencies() {
+  local missing=()
+  
+  if ! command -v magick >/dev/null 2>&1 && ! command -v convert >/dev/null 2>&1; then
+    missing+=("ImageMagick (magick or convert) — required for notification color swatches")
+  fi
+  
+  if ! command -v wl-copy >/dev/null 2>&1 && ! command -v xclip >/dev/null 2>&1; then
+    missing+=("wl-clipboard (wl-copy) or xclip — required for clipboard copy support")
+  fi
+  
+  if ! command -v python3 >/dev/null 2>&1; then
+    missing+=("python3 — required for color conversions and picker GUI")
+  elif ! python3 -c "import PyQt6.QtDBus" >/dev/null 2>&1; then
+    missing+=("python3-pyqt6 — required for the KDE color picker DBus interface")
+  fi
+  
+  if ! command -v jq >/dev/null 2>&1; then
+    missing+=("jq — required for JSON formatting and color names")
+  fi
+  
+  if ! command -v curl >/dev/null 2>&1; then
+    missing+=("curl — required for fetching color names from the API")
+  fi
+  
+  if ! command -v notify-send >/dev/null 2>&1; then
+    missing+=("libnotify (notify-send) — required for desktop notifications")
+  fi
+  
+  local env_ok=1
+  if [[ -z "${WAYLAND_DISPLAY:-}" ]]; then
+    env_ok=0
+  fi
+  local desktop="${XDG_CURRENT_DESKTOP:-}"
+  if [[ "$desktop" != *KDE* ]] && [[ -z "${KDE_FULL_SESSION:-}" ]]; then
+    env_ok=0
+  fi
+  
+  if [[ $env_ok -eq 0 ]]; then
+    missing+=("KDE Plasma on Wayland — required for the screen color picker feature")
+  fi
+  
+  if [[ ${#missing[@]} -gt 0 ]]; then
+    local yellow='\033[33m'
+    local bold='\033[1m'
+    local reset='\033[0m'
+    printf "\n  ${bold}${yellow}Warnings — Missing optional dependencies:${reset}\n"
+    for item in "${missing[@]}"; do
+      printf "    - %s\n" "$item"
+    done
+    printf "  ${yellow}Functionality will be limited without these installed.${reset}\n"
+  fi
+}
+
 do_install() {
   local data_dir="$HOME/.local/share/color-tool"
   local bin_dir="$HOME/.local/bin"
@@ -497,6 +570,8 @@ EOF
     printf "\nNote: %s is not in your PATH.\n" "$bin_dir"
     suggest_path_add "$bin_dir"
   fi
+
+  check_dependencies
 }
 
 # ── Color conversion ──────────────────────────────────────────────────────────
@@ -571,10 +646,12 @@ process_color() {
     return 1
   }
 
+  local hex_color
+  hex_color=$(echo "$formats_json" | jq -r '.hex // empty')
+
   local name=""
   if [[ $name_mode -eq 1 ]]; then
-    local hex_for_api
-    hex_for_api=$(echo "$formats_json" | jq -r '.hex' | tr -d '#')
+    local hex_for_api="${hex_color//#/}"
     name=$(curl -s "https://www.thecolorapi.com/id?hex=$hex_for_api" | jq -r '.name.value // empty')
   fi
 
@@ -640,7 +717,7 @@ process_color() {
 
 Value: $output_text"
     else
-      notify_result "$output_text"
+      notify_result "$output_text" "$hex_color"
     fi
   fi
 }
@@ -706,7 +783,6 @@ while [[ $# -gt 0 ]]; do
   shift
 done
 
-# Apply final hierarchy: CLI Flags > Desktop Config (if --desktop) > Default Config
 if [[ $desktop_mode -eq 1 ]]; then
   json_mode=${cli_json:-$desktop_json}
   alpha_mode=${cli_alpha:-$desktop_alpha}
@@ -714,8 +790,8 @@ if [[ $desktop_mode -eq 1 ]]; then
   notify_mode=${cli_notify:-$desktop_notify}
   output_formats=${cli_output:-$desktop_output}
   copy_mode=${cli_copy:-$desktop_copy}
+  swatch_mode=${cli_swatch:-$desktop_swatch}
   do_pick=${cli_pick:-1}
-  swatch_mode=${cli_swatch:-0} # swatch usually off in desktop mode
 else
   json_mode=${cli_json:-$json_mode}
   alpha_mode=${cli_alpha:-$alpha_mode}

tests/run_tests.sh

@@ -206,6 +206,32 @@ it "rejects invalid formats"
 output=$("$COLOR_TOOL" "#000000" --output badfmt --no-copy --no-notify 2>&1 || true)
 assert_contains "$output" "Error: Invalid output format: badfmt"
 
+# 14. Installation Dependency Warnings
+it "warns about missing dependencies during install"
+mkdir -p "$TEST_DIR/install_bin"
+for cmd in bash cat echo printf mkdir mktemp chmod rm cp ln dirname readlink ps; do
+  if [[ -e "/usr/bin/$cmd" || -L "/usr/bin/$cmd" ]]; then
+    /usr/bin/ln -s "/usr/bin/$cmd" "$TEST_DIR/install_bin/$cmd"
+  elif [[ -e "/bin/$cmd" || -L "/bin/$cmd" ]]; then
+    /usr/bin/ln -s "/bin/$cmd" "$TEST_DIR/install_bin/$cmd"
+  fi
+done
+output=$(PATH="$TEST_DIR/install_bin" HOME="$TEST_DIR" WAYLAND_DISPLAY="" XDG_CURRENT_DESKTOP="" KDE_FULL_SESSION="" "$COLOR_TOOL" --install 2>&1 || true)
+
+if [[ "$output" == *"python3 — required"* ]] &&
+   [[ "$output" == *"jq — required"* ]] &&
+   [[ "$output" == *"curl — required"* ]] &&
+   [[ "$output" == *"libnotify (notify-send)"* ]] &&
+   [[ "$output" == *"KDE Plasma on Wayland"* ]] &&
+   [[ "$output" == *"ImageMagick"* ]] &&
+   [[ "$output" == *"wl-clipboard"* ]]; then
+  echo "PASS"
+  passed=$((passed + 1))
+else
+  echo "FAIL"
+  echo "  Actual output: $output"
+fi
+
 # ── Cleanup ───────────────────────────────────────────────────────────────────
 echo "---------------------------------------"
 echo "Result: $passed/$total tests passed."