added Message/AttachmentAction

src/Blockkit/Blocks/Elements/PlaintTextInput.php

@@ -69,9 +69,12 @@ final class PlaintTextInput extends Element
 		return $this;
 	}
 
-	public function placeholder(string $text): self
+	public function placeholder(Text $text): self
 	{
-		$this->placeholder = $this->validate('placeholder',$text);
+		if (strlen($text->text) > self::LIMITS['placeholder'])
+			throw new Exception(sprintf('Text must be %d chars or less',self::LIMITS['placeholder']));
+
+		$this->placeholder = $text;
 
 		return $this;
 	}

src/Message.php

@@ -98,6 +98,13 @@ final class Message extends BlockKit
 		return $this;
 	}
 
+	public function clearAttachments(): self
+	{
+		$this->attachments = '';
+
+		return $this;
+	}
+
 	public function forgetTS(): self
 	{
 		$this->_data->forget('ts');

src/Message/Attachment.php

@@ -33,22 +33,12 @@ final class Attachment extends BlockKit
 	 * @note These are now legacy - use blocks instead
 	 * @note more information on this available https://api.slack.com/legacy/interactive-message-field-guide
 	 */
-	public function addAction(string $name,string $text,string $type,string $value,string $style=NULL,array $confirm=NULL): self
+	public function addAction(AttachmentAction $action): self
 	{
-		if (! Arr::get($this->_data,'actions')) {
+		if (! Arr::get($this->_data,'actions'))
 			$this->actions = collect();
-			$this->attachment_type = 'default';
-		}
 
-		$action = ['name'=>$name,'text'=>$text,'type'=>$type,'value'=>$value];
-		if ($style)
-			$action['style'] = $style;
-
-		// Confirm dialog is an array of 'title','text','ok_text','dismiss_text'
-		if ($confirm)
-			$action['confirm'] = $confirm;
-
-		$this->actions->push();
+		$this->actions->push($action);
 
 		return $this;
 	}

src/Message/AttachmentAction.php

@@ -0,0 +1,125 @@
+<?php
+
+namespace Slack\Message;
+
+use Slack\BlockKit;
+use Slack\Blockkit\Blocks\Elements\Text;
+
+/**
+ * Class MessageAttachmentAction - Slack Message Attachments Actions
+ * Represents an Single Action for a Slack Message Attachment
+ *
+ * @package App\Slack\Message
+ * @note These are now legacy - use blocks instead
+ * @note more information on this available https://api.slack.com/legacy/interactive-message-field-guide
+ */
+final class AttachmentAction extends BlockKit
+{
+	protected const LIMITS = [
+		'text' => 30,
+		'value' => 2000,
+	];
+
+	private const DATA_SOURCES = ['static','users','channels','conversastions','external'];
+	private const STYLES = ['default','danger','primary'];
+	private const TYPES = ['button','select'];
+
+	// @todo options
+	// @todo option_groups
+	// @todo selected_options
+
+	public function __construct(string $text,string $name,string $type)
+	{
+		parent::__construct();
+
+		if (! in_array($type,self::TYPES))
+			throw new Exception(sprintf('Type [%s] not valid',$type));
+
+		$this->type = $type;
+		switch ($type) {
+			case 'button':
+				$this->action_id = $name;
+				$this->text = Text::item($this->validate('text',$text),'plain_text');
+				break;
+
+			case 'select':
+				$this->name = $name;
+				$this->text = $this->validate('text',$text);
+				break;
+		}
+	}
+
+	public static function item(string $text,string $name,string $type): self
+	{
+		return new self($text,$name,$type);
+	}
+
+	/* OPTIONAL ITEMS */
+
+	/**
+	 * Set a confirmation diaglog when this action is selected
+	 *
+	 * @param string $title
+	 * @param string $text
+	 * @param string $ok_text
+	 * @param string $dismiss_text
+	 * @return $this
+	 */
+	public function confirm(string $title,string $text,string $ok_text,string $dismiss_text): self
+	{
+		$this->confirm = [
+			'title' => $title,
+			'text' => $text,
+			'ok_text' => $ok_text,
+			'dismiss_text' => $dismiss_text
+		];
+
+		return $this;
+	}
+
+	public function data_source(string $string): self
+	{
+		if (! in_array($string,self::DATA_SOURCES))
+			throw new Exception(sprintf('Type [%s] not valid',$string));
+
+		$this->data_source = $string;
+
+		return $this;
+	}
+
+	public function min_query_length(int $int): self
+	{
+		$this->min_query_length = $int;
+
+		return $this;
+	}
+
+	/**
+	 * Set the text displayed in the action
+	 *
+	 * @param string $type
+	 * @return $this
+	 */
+	public function style(string $string): self
+	{
+		if (! in_array($string,self::STYLES))
+			throw new Exception(sprintf('Type [%s] not valid',$string));
+
+		$this->style = $string;
+
+		return $this;
+	}
+
+	/**
+	 * Set the value for the action
+	 *
+	 * @param string $string
+	 * @return $this
+	 */
+	public function value(string $string): self
+	{
+		$this->value = $this->validate('value',$string);
+
+		return $this;
+	}
+}