# Plugin System

Create widgets for DankBar and Control Center using dynamically-loaded QML components.

## Plugin Registry

Browse and discover community plugins at **https://plugins.danklinux.com/**

## Overview

Plugins let you add custom widgets to DankBar and Control Center. They're discovered from `~/.config/DankMaterialShell/plugins/` and managed via PluginService.

## Architecture

### Core Components

1. **PluginService** (`Services/PluginService.qml`)
   - Singleton service managing plugin lifecycle
   - Discovers plugins from `$CONFIGPATH/DankMaterialShell/plugins/`
   - Handles loading, unloading, and state management
   - Provides data persistence for plugin settings

2. **PluginsTab** (`Modules/Settings/PluginsTab.qml`)
   - UI for managing available plugins
   - Access plugin settings

3. **PluginsTab Settings** (`Modules/Settings/PluginsTab.qml`)
   - Accordion-style plugin configuration interface
   - Dynamically loads plugin settings components inline
   - Provides consistent settings interface with proper focus handling

4. **DankBar Integration** (`Modules/DankBar/DankBar.qml`)
   - Renders plugin widgets in the bar
   - Merges plugin components with built-in widgets
   - Supports left, center, and right sections
   - Supports any dankbar position (top/left/right/bottom)

## Plugin Structure

Each plugin must be a directory in `$CONFIGPATH/DankMaterialShell/plugins/` containing:

```
$CONFIGPATH/DankMaterialShell/plugins/YourPlugin/
├── plugin.json          # Required: Plugin manifest
├── YourWidget.qml       # Required: Widget component
├── YourSettings.qml     # Optional: Settings UI
└── *.js                 # Optional: JavaScript utilities
```

### Plugin Manifest (plugin.json)

The manifest file defines plugin metadata and configuration.

**JSON Schema:** See `plugin-schema.json` for the complete specification and validation schema.

```json
{
    "id": "yourPlugin",
    "name": "Your Plugin Name",
    "description": "Brief description of what your plugin does",
    "version": "1.0.0",
    "author": "Your Name",
    "type": "widget",
    "capabilities": ["thing-my-plugin-does"],
    "component": "./YourWidget.qml",
    "icon": "material_icon_name",
    "settings": "./YourSettings.qml",
    "requires_dms": ">=0.1.0",
    "requires": ["some-system-tool"],
    "permissions": [
        "settings_read",
        "settings_write"
    ]
}
```

**Required Fields:**
- `id`: Unique plugin identifier (camelCase, no spaces)
- `name`: Human-readable plugin name
- `description`: Short description of plugin functionality (displayed in UI)
- `version`: Semantic version string (e.g., "1.0.0")
- `author`: Plugin creator name or email
- `type`: Plugin type - "widget", "daemon", or "launcher"
- `capabilities`: Array of plugin capabilities  (e.g., ["dankbar-widget"], ["control-center"], ["monitoring"])
- `component`: Relative path to main QML component file

**Required for Launcher Type:**
- `trigger`: Trigger string for launcher activation (e.g., "=", "#", "!")

**Optional Fields:**
- `icon`: Material Design icon name (displayed in UI)
- `settings`: Path to settings component (enables settings UI)
- `requires_dms`: Minimum DMS version requirement (e.g., ">=0.1.18", ">0.1.0")
- `requires`: Array of required system tools/dependencies (e.g., ["wl-copy", "curl"])
- `permissions`: Required DMS permissions (e.g., ["settings_read", "settings_write"])

**Permissions:**

The plugin system enforces permissions when settings are accessed:
- `settings_read`: Required to read plugin settings (currently not enforced)
- `settings_write`: **Required** to use PluginSettings component and save settings

If your plugin includes a settings component but doesn't declare `settings_write` permission, users will see an error message instead of the settings UI.

### Widget Component

The main widget component uses the **PluginComponent** wrapper which provides automatic property injection and bar integration:

```qml
import QtQuick
import qs.Common
import qs.Widgets
import qs.Modules.Plugins

PluginComponent {
    // Define horizontal bar pill, for top and bottom DankBar positions (optional)
    horizontalBarPill: Component {
        StyledRect {
            width: content.implicitWidth + Theme.spacingM * 2
            height: parent.widgetThickness
            radius: Theme.cornerRadius
            color: Theme.surfaceContainerHigh

            StyledText {
                id: content
                anchors.centerIn: parent
                text: "Hello World"
                color: Theme.surfaceText
                font.pixelSize: Theme.fontSizeMedium
            }
        }
    }

    // Define vertical bar pill, for left and right DankBar positions (optional)
    verticalBarPill: Component {
        // Same as horizontal but optimized for vertical layout
    }

    // Define popout content, opens when clicking the bar pill (optional)
    popoutContent: Component {
        PopoutComponent {
            headerText: "My Plugin"
            detailsText: "Optional description text goes here"
            showCloseButton: true

            // Your popout content goes here
            Column {
                width: parent.width
                spacing: Theme.spacingM

                StyledText {
                    text: "Popout Content"
                    font.pixelSize: Theme.fontSizeLarge
                    color: Theme.surfaceText
                }
            }
        }
    }

    // Popout dimensions (required if popoutContent is set)
    popoutWidth: 400
    popoutHeight: 300
}
```

**PluginComponent Properties (automatically injected):**
- `axis`: Bar axis information (horizontal/vertical)
- `section`: Bar section ("left", "center", "right")
- `parentScreen`: Screen reference for multi-monitor support
- `widgetThickness`: Recommended widget size perpendicular to bar
- `barThickness`: Bar thickness parallel to edge

**Component Options:**
- `horizontalBarPill`: Component shown in horizontal bars
- `verticalBarPill`: Component shown in vertical bars
- `popoutContent`: Optional popout window content
- `popoutWidth`: Popout window width
- `popoutHeight`: Popout window height
- `pillClickAction`: Custom click handler function (overrides popout)

### Control Center Integration

Add your plugin to Control Center by defining CC properties:

```qml
PluginComponent {
    ccWidgetIcon: "toggle_on"
    ccWidgetPrimaryText: "My Feature"
    ccWidgetSecondaryText: isEnabled ? "Active" : "Inactive"
    ccWidgetIsActive: isEnabled

    onCcWidgetToggled: {
        isEnabled = !isEnabled
        if (pluginService) {
            pluginService.savePluginData("myPlugin", "isEnabled", isEnabled)
        }
    }

    ccDetailContent: Component {
        Rectangle {
            implicitHeight: 200
            color: Theme.surfaceContainerHigh
            radius: Theme.cornerRadius
            // Your detail UI here
        }
    }

    horizontalBarPill: Component { /* ... */ }
}
```

**CC Properties:**
- `ccWidgetIcon`: Material icon name
- `ccWidgetPrimaryText`: Main label
- `ccWidgetSecondaryText`: Subtitle/status
- `ccWidgetIsActive`: Active state styling
- `ccDetailContent`: Optional dropdown panel (use for CompoundPill)

**Signals:**
- `ccWidgetToggled()`: Fired when icon clicked
- `ccWidgetExpanded()`: Fired when expand area clicked (CompoundPill only)

**Widget Sizing:**
- 25% width → SmallToggleButton (icon only)
- 50% width → ToggleButton (no detail) or CompoundPill (with detail)
- Users can resize in edit mode

**Custom Click Actions:**

Override default popout with `pillClickAction`:

```qml
pillClickAction: () => {
    Process.exec("bash", ["-c", "notify-send 'Clicked!'"])
}

// Or with position params: (x, y, width, section, screen)
pillClickAction: (x, y, width, section, screen) => {
    popoutService?.toggleControlCenter(x, y, width, section, screen)
}
```

The PluginComponent automatically handles:
- Bar orientation detection
- Click handlers for popouts
- Proper positioning and anchoring
- Theme integration

### PopoutComponent

PopoutComponent provides a consistent header/content layout for plugin popouts:

```qml
import qs.Modules.Plugins

PopoutComponent {
    headerText: "Header Title"        // Main header text (bold, large)
    detailsText: "Description text"   // Optional description (smaller, gray)
    showCloseButton: true             // Show X button in top-right

    // Access to exposed properties for dynamic sizing
    readonly property int headerHeight    // Height of header area
    readonly property int detailsHeight   // Height of description area

    // Your content here - use parent.width for full width
    // Calculate available height: root.popoutHeight - headerHeight - detailsHeight - spacing
    DankGridView {
        width: parent.width
        height: parent.height
        // ...
    }
}
```

**PopoutComponent Properties:**
- `headerText`: Main header text (optional, hidden if empty)
- `detailsText`: Description text below header (optional, hidden if empty)
- `showCloseButton`: Show close button in header (default: false)
- `closePopout`: Function to close popout (auto-injected by PluginPopout)
- `headerHeight`: Readonly height of header (0 if not visible)
- `detailsHeight`: Readonly height of description (0 if not visible)

The component automatically handles spacing and layout. Content children are rendered below the description with proper padding.

### Settings Component

Optional settings UI loaded inline in the PluginsTab accordion interface. Use the simplified settings API with auto-storage components:

```qml
import QtQuick
import qs.Common
import qs.Widgets
import qs.Modules.Plugins

PluginSettings {
    id: root
    pluginId: "yourPlugin"

    StringSetting {
        settingKey: "apiKey"
        label: "API Key"
        description: "Your API key for accessing the service"
        placeholder: "Enter API key..."
    }

    ToggleSetting {
        settingKey: "notifications"
        label: "Enable Notifications"
        description: "Show desktop notifications for updates"
        defaultValue: true
    }

    SelectionSetting {
        settingKey: "updateInterval"
        label: "Update Interval"
        description: "How often to refresh data"
        options: [
            {label: "1 minute", value: "60"},
            {label: "5 minutes", value: "300"},
            {label: "15 minutes", value: "900"}
        ]
        defaultValue: "300"
    }

    ListSetting {
        id: itemList
        settingKey: "items"
        label: "Saved Items"
        description: "List of configured items"
        delegate: Component {
            StyledRect {
                width: parent.width
                height: 40
                radius: Theme.cornerRadius
                color: Theme.surfaceContainerHigh

                StyledText {
                    anchors.left: parent.left
                    anchors.leftMargin: Theme.spacingM
                    anchors.verticalCenter: parent.verticalCenter
                    text: modelData.name
                    color: Theme.surfaceText
                }

                Rectangle {
                    anchors.right: parent.right
                    anchors.rightMargin: Theme.spacingM
                    anchors.verticalCenter: parent.verticalCenter
                    width: 60
                    height: 28
                    color: removeArea.containsMouse ? Theme.errorHover : Theme.error
                    radius: Theme.cornerRadius

                    StyledText {
                        anchors.centerIn: parent
                        text: "Remove"
                        color: Theme.errorText
                        font.pixelSize: Theme.fontSizeSmall
                        font.weight: Font.Medium
                    }

                    MouseArea {
                        id: removeArea
                        anchors.fill: parent
                        hoverEnabled: true
                        cursorShape: Qt.PointingHandCursor
                        onClicked: itemList.removeItem(index)
                    }
                }
            }
        }
    }
}
```

**Available Setting Components:**

All settings automatically save on change and load on component creation.

**How Default Values Work:**

Each setting component has a `defaultValue` property that is used when no saved value exists. Define sensible defaults in your settings UI:

```qml
StringSetting {
    settingKey: "apiKey"
    defaultValue: ""  // Empty string if no key saved
}

ToggleSetting {
    settingKey: "enabled"
    defaultValue: true  // Enabled by default
}

ListSettingWithInput {
    settingKey: "locations"
    defaultValue: []  // Empty array if no locations saved
}
```

1. **PluginSettings** - Root wrapper for all plugin settings
   - `pluginId`: Your plugin ID (required)
   - Auto-handles storage and provides saveValue/loadValue to children
   - Place all other setting components inside this wrapper

2. **StringSetting** - Text input field
   - `settingKey`: Storage key (required)
   - `label`: Display label (required)
   - `description`: Help text (optional)
   - `placeholder`: Input placeholder (optional)
   - `defaultValue`: Default value (optional, default: `""`)
   - Layout: Vertical stack (label, description, input field)

3. **ToggleSetting** - Boolean toggle switch
   - `settingKey`: Storage key (required)
   - `label`: Display label (required)
   - `description`: Help text (optional)
   - `defaultValue`: Default boolean (optional, default: `false`)
   - Layout: Horizontal (label/description left, toggle right)

4. **SelectionSetting** - Dropdown menu
   - `settingKey`: Storage key (required)
   - `label`: Display label (required)
   - `description`: Help text (optional)
   - `options`: Array of `{label, value}` objects or simple strings (required)
   - `defaultValue`: Default value (optional, default: `""`)
   - Layout: Horizontal (label/description left, dropdown right)
   - Stores the `value` field, displays the `label` field

5. **ListSetting** - Manage list of items (manual add/remove)
   - `settingKey`: Storage key (required)
   - `label`: Display label (required)
   - `description`: Help text (optional)
   - `defaultValue`: Default array (optional, default: `[]`)
   - `delegate`: Custom item delegate Component (optional)
   - `addItem(item)`: Add item to list
   - `removeItem(index)`: Remove item from list
   - Use when you need custom UI for adding items

6. **ListSettingWithInput** - Complete list management with built-in form
   - `settingKey`: Storage key (required)
   - `label`: Display label (required)
   - `description`: Help text (optional)
   - `defaultValue`: Default array (optional, default: `[]`)
   - `fields`: Array of field definitions (required)
     - `id`: Field ID in saved object (required)
     - `label`: Column header text (required)
     - `placeholder`: Input placeholder (optional)
     - `width`: Column width in pixels (optional, default 200)
     - `required`: Must have value to add (optional, default false)
     - `default`: Default value if empty (optional)
   - Automatically generates:
     - Column headers from field labels
     - Input fields with placeholders
     - Add button with validation
     - List display showing all field values
     - Remove buttons for each item
   - Best for collecting structured data (servers, locations, etc.)

**Complete Settings Example:**

```qml
import QtQuick
import qs.Common
import qs.Widgets
import qs.Modules.Plugins

PluginSettings {
    pluginId: "myPlugin"

    StyledText {
        width: parent.width
        text: "General Settings"
        font.pixelSize: Theme.fontSizeLarge
        font.weight: Font.Bold
        color: Theme.surfaceText
    }

    StringSetting {
        settingKey: "apiKey"
        label: "API Key"
        description: "Your service API key"
        placeholder: "sk-..."
        defaultValue: ""
    }

    ToggleSetting {
        settingKey: "enabled"
        label: "Enable Feature"
        description: "Turn this feature on or off"
        defaultValue: true
    }

    SelectionSetting {
        settingKey: "theme"
        label: "Theme"
        description: "Choose your preferred theme"
        options: [
            {label: "Dark", value: "dark"},
            {label: "Light", value: "light"},
            {label: "Auto", value: "auto"}
        ]
        defaultValue: "dark"
    }

    ListSettingWithInput {
        settingKey: "locations"
        label: "Locations"
        description: "Track multiple locations"
        defaultValue: []
        fields: [
            {id: "name", label: "Name", placeholder: "Home", width: 150, required: true},
            {id: "timezone", label: "Timezone", placeholder: "America/New_York", width: 200, required: true}
        ]
    }
}
```

**Key Benefits:**
- Zero boilerplate - just define your settings
- Automatic persistence to `settings.json`
- Clean, consistent UI across all plugins
- No manual `pluginService` calls needed
- Proper layout and spacing handled automatically

## PluginService API

### Properties

```qml
PluginService.pluginDirectory: string
// Path to plugins directory ($CONFIGPATH/DankMaterialShell/plugins)

PluginService.availablePlugins: object
// Map of all discovered plugins {pluginId: pluginInfo}

PluginService.loadedPlugins: object
// Map of currently loaded plugins {pluginId: pluginInfo}

PluginService.pluginWidgetComponents: object
// Map of loaded widget components {pluginId: Component}
```

### Functions

```qml
// Plugin Management
PluginService.loadPlugin(pluginId: string): bool
PluginService.unloadPlugin(pluginId: string): bool
PluginService.reloadPlugin(pluginId: string): bool
PluginService.enablePlugin(pluginId: string): bool
PluginService.disablePlugin(pluginId: string): bool

// Plugin Discovery
PluginService.scanPlugins(): void
PluginService.getAvailablePlugins(): array
PluginService.getLoadedPlugins(): array
PluginService.isPluginLoaded(pluginId: string): bool
PluginService.getWidgetComponents(): object

// Data Persistence
PluginService.savePluginData(pluginId: string, key: string, value: any): bool
PluginService.loadPluginData(pluginId: string, key: string, defaultValue: any): any
```

### Signals

```qml
PluginService.pluginLoaded(pluginId: string)
PluginService.pluginUnloaded(pluginId: string)
PluginService.pluginLoadFailed(pluginId: string, error: string)
```

## Creating a Plugin

### Step 1: Create Plugin Directory

```bash
mkdir -p $CONFIGPATH/DankMaterialShell/plugins/MyPlugin
cd $CONFIGPATH/DankMaterialShell/plugins/MyPlugin
```

### Step 2: Create Manifest

Create `plugin.json`:

```json
{
    "id": "myPlugin",
    "name": "My Plugin",
    "description": "A sample plugin",
    "version": "1.0.0",
    "author": "Your Name",
    "type": "widget",
    "capabilities": ["my-functionality"],
    "component": "./MyWidget.qml",
    "icon": "extension",
    "settings": "./MySettings.qml",
    "requires_dms": ">=0.1.0",
    "permissions": ["settings_read", "settings_write"]
}
```

### Step 3: Create Widget Component

Create `MyWidget.qml`:

```qml
import QtQuick
import qs.Common
import qs.Widgets
import qs.Modules.Plugins

PluginComponent {
    horizontalBarPill: Component {
        StyledRect {
            width: textItem.implicitWidth + Theme.spacingM * 2
            height: parent.widgetThickness
            radius: Theme.cornerRadius
            color: Theme.surfaceContainerHigh

            StyledText {
                id: textItem
                anchors.centerIn: parent
                text: "Hello World"
                color: Theme.surfaceText
                font.pixelSize: Theme.fontSizeMedium
            }
        }
    }

    verticalBarPill: Component {
        StyledRect {
            width: parent.widgetThickness
            height: textItem.implicitWidth + Theme.spacingM * 2
            radius: Theme.cornerRadius
            color: Theme.surfaceContainerHigh

            StyledText {
                id: textItem
                anchors.centerIn: parent
                text: "Hello"
                color: Theme.surfaceText
                font.pixelSize: Theme.fontSizeSmall
                rotation: 90
            }
        }
    }
}
```

**Note:** Use `PluginComponent` wrapper for automatic property injection and bar integration. Define separate components for horizontal and vertical orientations.

### Step 4: Create Settings Component (Optional)

Create `MySettings.qml`:

```qml
import QtQuick
import qs.Common
import qs.Widgets
import qs.Modules.Plugins

PluginSettings {
    pluginId: "myPlugin"

    StyledText {
        width: parent.width
        text: "Configure your plugin settings"
        font.pixelSize: Theme.fontSizeMedium
        color: Theme.surfaceVariantText
        wrapMode: Text.WordWrap
    }

    StringSetting {
        settingKey: "text"
        label: "Display Text"
        description: "Text shown in the bar widget"
        placeholder: "Hello World"
        defaultValue: "Hello World"
    }

    ToggleSetting {
        settingKey: "showIcon"
        label: "Show Icon"
        description: "Display an icon next to the text"
        defaultValue: true
    }
}
```

### Step 5: Enable Plugin

1. Run the shell: `qs -p $CONFIGPATH/quickshell/dms/shell.qml`
2. Open Settings (Ctrl+,)
3. Navigate to Plugins tab
4. Click "Scan for Plugins"
5. Enable your plugin with the toggle switch
6. Add the plugin to your DankBar configuration

## Adding Plugin to DankBar

After enabling a plugin, add it to the bar:

1. Open Settings → Appearance → DankBar Layout
2. Add a new widget entry with your plugin ID
3. Choose section (left, center, right)
4. Save and reload

Or edit `$CONFIGPATH/quickshell/dms/config.json`:

```json
{
    "dankBarLeftWidgets": [
        {"widgetId": "myPlugin", "enabled": true}
    ]
}
```

## Best Practices

1. **Use Existing Widgets**: Leverage `qs.Widgets` components (DankIcon, DankToggle, etc.) for consistency
2. **Follow Theme**: Use `Theme` singleton for colors, spacing, and fonts
3. **Data Persistence**: Use PluginService data APIs instead of manual file operations
4. **Error Handling**: Gracefully handle missing dependencies and invalid data
5. **Performance**: Keep widgets lightweight, avoid long operations that block the UI loop
6. **Responsive Design**: Adapt to `compactMode` and different screen sizes
7. **Documentation**: Include README.md explaining plugin usage
8. **Versioning**: Use semantic versioning for updates
9. **Dependencies**: Document external library requirements

## Clipboard Access

Plugins that need to copy text to the clipboard **must** use the Wayland clipboard utility `wl-copy` through Quickshell's `execDetached` function.

### Correct Method

Import Quickshell and use `execDetached` with `wl-copy`:

```qml
import QtQuick
import Quickshell

Item {
    function copyToClipboard(text) {
        Quickshell.execDetached(["sh", "-c", "echo -n '" + text + "' | wl-copy"])
    }
}
```

### Example Usage

From the ExampleEmojiPlugin (EmojiWidget.qml:136):

```qml
MouseArea {
    onClicked: {
        Quickshell.execDetached(["sh", "-c", "echo -n '" + modelData + "' | wl-copy"])
        ToastService.showInfo("Copied " + modelData + " to clipboard")
        popoutColumn.closePopout()
    }
}
```

### Important Notes

1. **Do NOT** use `globalThis.clipboard` or similar JavaScript APIs - they don't exist in the QML runtime
2. **Always** import `Quickshell` at the top of your QML file
3. **Use** `echo -n` to prevent adding a trailing newline to the clipboard content
4. The `-c` flag for `sh` is required to execute the pipe command properly
5. Consider showing a toast notification to confirm the copy action to users

### Dependencies

This method requires `wl-copy` from the `wl-clipboard` package, which is standard on Wayland systems.

## Running External Commands

Plugins that need to execute external commands and capture their output should use the `Proc` singleton, which provides debounced command execution with automatic cleanup.

### Correct Method

Import the `Proc` singleton from `qs.Common` and use `runCommand`:

```qml
import QtQuick
import qs.Common

Item {
    function fetchData() {
        Proc.runCommand(
            "myPlugin.fetchData",
            ["curl", "-s", "https://api.example.com/data"],
            (stdout, exitCode) => {
                if (exitCode === 0) {
                    console.log("Success:", stdout)
                    processData(stdout)
                } else {
                    console.error("Command failed with exit code:", exitCode)
                }
            },
            100
        )
    }
}
```

### Function Signature

```qml
Proc.runCommand(id, command, callback, debounceMs)
```

**Parameters:**
- `id` (string): Unique identifier for this command. Used for debouncing - multiple calls with the same ID within the debounce window will only execute the last one
- `command` (array): Command and arguments as an array (e.g., `["sh", "-c", "echo hello"]`)
- `callback` (function): Callback function receiving `(stdout, exitCode)` when the command completes
  - `stdout` (string): Captured standard output from the command
  - `exitCode` (number): Exit code of the process (0 typically means success)
- `debounceMs` (number, optional): Debounce delay in milliseconds. Defaults to 50ms if not specified

### Key Features

1. **Automatic Cleanup**: Process objects are automatically destroyed after completion
2. **Debouncing**: Rapid successive calls with the same ID are debounced, only executing the last one
3. **Output Capture**: Automatically captures stdout for processing
4. **Error Handling**: Exit codes are passed to the callback for error detection

### Example Usage

#### Simple Command Execution

```qml
import QtQuick
import qs.Common

Item {
    function checkNetwork() {
        Proc.runCommand(
            "myPlugin.ping",
            ["ping", "-c", "1", "8.8.8.8"],
            (output, exitCode) => {
                if (exitCode === 0) {
                    console.log("Network is up")
                } else {
                    console.log("Network is down")
                }
            }
        )
    }
}
```

#### Parsing Command Output

```qml
import QtQuick
import qs.Common

Item {
    property var diskUsage: ({})

    function updateDiskUsage() {
        Proc.runCommand(
            "myPlugin.df",
            ["df", "-h", "/home"],
            (output, exitCode) => {
                if (exitCode === 0) {
                    const lines = output.trim().split("\n")
                    if (lines.length > 1) {
                        const parts = lines[1].split(/\s+/)
                        diskUsage = {
                            total: parts[1],
                            used: parts[2],
                            available: parts[3],
                            percent: parts[4]
                        }
                    }
                }
            }
        )
    }
}
```

#### Shell Commands with Pipes

```qml
import QtQuick
import qs.Common

Item {
    function getTopProcess() {
        Proc.runCommand(
            "myPlugin.topProcess",
            ["sh", "-c", "ps aux | sort -nrk 3,3 | head -n 1"],
            (output, exitCode) => {
                if (exitCode === 0) {
                    console.log("Top process:", output)
                }
            }
        )
    }
}
```

#### Debouncing Rapid Updates

```qml
import QtQuick
import qs.Common
import qs.Widgets

Item {
    DankTextField {
        id: searchField
        placeholderText: "Search files..."

        onTextChanged: {
            Proc.runCommand(
                "myPlugin.search",
                ["find", "/home", "-name", "*" + text + "*"],
                (output, exitCode) => {
                    if (exitCode === 0) {
                        updateSearchResults(output)
                    }
                },
                500
            )
        }
    }
}
```

### Important Notes

1. **Unique IDs**: Use descriptive, namespaced IDs (e.g., `"myPlugin.actionName"`) to avoid conflicts
2. **Debouncing**: Use appropriate debounce delays for your use case:
   - Fast updates (50-100ms): System monitoring, real-time data
   - User input (300-500ms): Search fields, text input processing
   - Network requests (500-1000ms): API calls, web scraping
3. **Error Handling**: Always check the exit code in your callback before processing output
4. **Shell Commands**: Use `["sh", "-c", "command"]` for complex shell commands with pipes or redirects
5. **Security**: Sanitize user input before passing to commands to prevent command injection
6. **Performance**: Avoid running expensive commands too frequently - use debouncing wisely

### Comparison with Other Methods

**Proc.runCommand** vs **Quickshell.execDetached**:
- Use `Proc.runCommand` when you need to capture output or check exit codes
- Use `Quickshell.execDetached` for fire-and-forget operations (like clipboard copy)

**Proc.runCommand** vs **Process component**:
- Use `Proc.runCommand` for simple, one-off command executions with automatic cleanup
- Use `Process` component for long-running processes or when you need fine-grained control

## Debugging

### Console Logging

View plugin logs:

```bash
qs -v -p $CONFIGPATH/quickshell/dms/shell.qml
```

Look for lines prefixed with:
- `PluginService:` - Service operations
- `PluginsTab:` - UI interactions
- `PluginsTab:` - Settings loading and accordion interface

### Common Issues

1. **Plugin Not Detected**
   - Check plugin.json syntax (use `jq` or JSON validator)
   - Verify directory is in `$CONFIGPATH/DankMaterialShell/plugins/`
   - Click "Scan for Plugins" in Settings

2. **Widget Not Displaying**
   - Ensure plugin is enabled in Settings
   - Add plugin ID to DankBar widget list
   - Check widget width/height properties

3. **Settings Not Loading**
   - Verify `settings` path in plugin.json
   - Check settings component for errors
   - Ensure plugin is enabled and loaded
   - Review PluginsTab console output for injection issues

4. **Data Not Persisting**
   - Confirm pluginService.savePluginData() calls (with injection)
   - Check `$CONFIGPATH/DankMaterialShell/settings.json` for pluginSettings data
   - Verify plugin has settings permissions
   - Ensure PluginService was properly injected into settings component

## Security Considerations

Plugins run with full QML runtime access. Only install plugins from trusted sources.

**Permissions System:**
- `settings_read`: Read plugin configuration (not currently enforced)
- `settings_write`: **Required** to use PluginSettings - write plugin configuration (enforced)
- `process`: Execute system commands (not currently enforced)
- `network`: Network access (not currently enforced)

Currently, only `settings_write` is enforced by the PluginSettings component.

## API Stability

The plugin API is currently **experimental**. Breaking changes may occur in minor version updates. Pin to specific DMS versions for production use.

**Roadmap:**
- Plugin marketplace/repository
- Sandboxed plugin execution
- Enhanced permission system
- Plugin update notifications
- Inter-plugin communication

## Launcher Plugins

Launcher plugins extend the DMS application launcher by adding custom searchable items with trigger-based filtering.

### Overview

Launcher plugins enable you to:
- Add custom items to the launcher/app drawer
- Use trigger strings for quick filtering (e.g., `!`, `#`, `@`)
- Execute custom actions when items are selected
- Provide searchable, categorized content
- Integrate seamlessly with the existing launcher

### Plugin Type Configuration

To create a launcher plugin, set the plugin type in `plugin.json`:

```json
{
    "id": "myLauncher",
    "name": "My Launcher Plugin",
    "description": "A custom launcher plugin for quick actions",
    "version": "1.0.0",
    "author": "Your Name",
    "type": "launcher",
    "capabilities": ["show-thing"],
    "component": "./MyLauncher.qml",
    "trigger": "#",
    "icon": "search",
    "settings": "./MySettings.qml",
    "requires_dms": ">=0.1.18",
    "permissions": ["settings_read", "settings_write"]
}
```

### Launcher Component Contract

Create `MyLauncher.qml` with the following interface:

```qml
import QtQuick
import qs.Services

Item {
    id: root

    // Required properties
    property var pluginService: null
    property string trigger: "#"

    // Required signals
    signal itemsChanged()

    // Required: Return array of launcher items
    function getItems(query) {
        return [
            {
                name: "Item Name",
                icon: "icon_name",
                comment: "Description",
                action: "type:data",
                categories: ["MyLauncher"]
            }
        ]
    }

    // Required: Execute item action
    function executeItem(item) {
        const [type, data] = item.action.split(":", 2)
        // Handle action based on type
    }

    Component.onCompleted: {
        if (pluginService) {
            trigger = pluginService.loadPluginData("myLauncher", "trigger", "#")
        }
    }
}
```

### Item Structure

Each item returned by `getItems()` must include:

- `name` (string): Display name shown in launcher
- `icon` (string): Material Design icon name
- `comment` (string): Description/subtitle text
- `action` (string): Action identifier in `type:data` format
- `categories` (array): Array containing your plugin name

### Trigger System

Triggers control when your plugin's items appear in the launcher:

**Empty Trigger Mode** (No trigger):
- Items always visible alongside regular apps
- Search includes your items automatically
- Configure by saving empty trigger: `trigger: ""`

**Custom Trigger Mode**:
- Items only appear when trigger is typed
- Example: Type `#` to show only your plugin's items
- Type `# query` to search within your plugin
- Configure any string: `#`, `!`, `@`, `!custom`, etc.

### Trigger Configuration in Settings

Provide a settings component with trigger configuration:

```qml
import QtQuick
import QtQuick.Controls
import qs.Widgets

FocusScope {
    id: root

    property var pluginService: null

    Column {
        spacing: 12

        CheckBox {
            id: noTriggerToggle
            text: "No trigger (always show)"
            checked: loadSettings("noTrigger", false)

            onCheckedChanged: {
                saveSettings("noTrigger", checked)
                if (checked) {
                    saveSettings("trigger", "")
                } else {
                    saveSettings("trigger", triggerField.text || "#")
                }
            }
        }

        DankTextField {
            id: triggerField
            visible: !noTriggerToggle.checked
            text: loadSettings("trigger", "#")
            placeholderText: "#"

            onTextEdited: {
                saveSettings("trigger", text || "#")
            }
        }
    }

    function saveSettings(key, value) {
        if (pluginService) {
            pluginService.savePluginData("myLauncher", key, value)
        }
    }

    function loadSettings(key, defaultValue) {
        if (pluginService) {
            return pluginService.loadPluginData("myLauncher", key, defaultValue)
        }
        return defaultValue
    }
}
```

### Action Execution

Handle different action types in `executeItem()`:

```qml
function executeItem(item) {
    const actionParts = item.action.split(":")
    const actionType = actionParts[0]
    const actionData = actionParts.slice(1).join(":")

    switch (actionType) {
        case "toast":
            if (typeof ToastService !== "undefined") {
                ToastService.showInfo("Plugin", actionData)
            }
            break
        case "copy":
            // Copy to clipboard
            break
        case "script":
            // Execute command
            break
        default:
            console.warn("Unknown action:", actionType)
    }
}
```

### Search and Filtering

The launcher automatically handles search when:

**With empty trigger**:
- Your items appear in all searches
- No prefix needed

**With custom trigger**:
- Type trigger alone: Shows all your items
- Type trigger + query: Filters your items by query
- The query parameter is passed to your `getItems(query)` function

Example `getItems()` implementation:

```qml
function getItems(query) {
    const allItems = [
        {name: "Item 1", ...},
        {name: "Item 2", ...},
        {name: "Test Item", ...}
    ]

    if (!query || query.length === 0) {
        return allItems
    }

    const lowerQuery = query.toLowerCase()
    return allItems.filter(item => {
        return item.name.toLowerCase().includes(lowerQuery) ||
               item.comment.toLowerCase().includes(lowerQuery)
    })
}
```

### Integration Flow

1. User opens launcher
2. If empty trigger: Your items appear alongside apps
3. If custom trigger: User types trigger (e.g., `#`)
4. Launcher calls `getItems(query)` on your plugin
5. Your items displayed with your plugin's category
6. User selects item and presses Enter
7. Launcher calls `executeItem(item)` on your plugin

### Best Practices

1. **Unique Triggers**: Choose non-conflicting trigger strings
2. **Fast Response**: Return results quickly from `getItems()`
3. **Clear Names**: Use descriptive item names and comments
4. **Error Handling**: Gracefully handle failures in `executeItem()`
5. **Cleanup**: Destroy temporary objects after use
6. **Empty Trigger Support**: Consider if your plugin benefits from always being visible

### Example Plugin

See `PLUGINS/LauncherExample/` for a complete working example demonstrating:
- Trigger configuration (including empty trigger mode)
- Multiple action types (toast, copy, script)
- Search/filtering implementation
- Settings integration
- Proper error handling

## Resources

- **Plugin Schema**: `plugin-schema.json` - JSON Schema for validation
- **Example Plugins**:
  - [Emoji Picker](./ExampleEmojiPlugin/)
  - [WorldClock](https://github.com/rochacbruno/WorldClock)
  - [LauncherExample](./LauncherExample/)
  - [Calculator](https://github.com/rochacbruno/DankCalculator)
- **PluginService**: `Services/PluginService.qml`
- **Settings UI**: `Modules/Settings/PluginsTab.qml`
- **DankBar Integration**: `Modules/DankBar/DankBar.qml`
- **Launcher Integration**: `Modules/AppDrawer/AppLauncher.qml`
- **Theme Reference**: `Common/Theme.qml`
- **Widget Library**: `Widgets/`

## Contributing

Share your plugins with the community:

1. Create a public repository with your plugin
2. Validate your `plugin.json` against `plugin-schema.json`
3. Include comprehensive README.md
4. Add example screenshots
5. Document dependencies and permissions

For plugin system improvements, submit issues or PRs to the main DMS repository.