V2.1.0 (#2)

* More handy subclasses
Introduce more handy subclasses `Section`, `Divider`, `MarkdownText`, `PlainText`, `Image`, `Button` to be used instead of the generic classes `Block`, `Accessory`, `Text`

* Update README with a Hello, World! example

* Update the readme file

* Fix accessory type for buttons and new lines at the end of some classes.

README.md

@@ -7,13 +7,41 @@ A simple PHP package that can be used to build and send Slack messages
 
 - PHP >= 7.1
 - PHP cURL Extension
+- PHP JSON Extension
 
 ### Installation
 ```
 composer require amiriskander/slack-notifier
 ```
 
 ### Usage
+
+There is no massive effort you need to create a simple text message like `Hello, World!`
+
+```
+use AmirIskander\SlackNotifier;
+
+public function TestHelloWorld()
+{
+    $message = new Message()
+        ->addBlock(new Section()->setText(new PlainText('Hello, World!')));
+        ->send('https://hooks.slack.com/services/....')
+    ;
+}
+``` 
+
+The package supports block types:
+- Divider: A horizontal gray divider.
+- Section: A container that can contain multiple components.
+
+And a block of type section can have components of types:
+- Text: Can be either `Plain Text` or `Markdown`
+- Accessory: Can be either `Button` or `Image`
+
+
+For more complex examples that needs adding blocks with images, links and buttons, it is not a big problem. 
+Check the below example: 
+
 ```
 use AmirIskander\SlackNotifier;
 
@@ -62,5 +90,53 @@ public function TestSendSlackMessage()
 }
 ```
 
+The same example using classes for Button, Image, Section, Divider
+```
+use AmirIskander\SlackNotifier;
+
+public function TestSendSlackMessage()
+{
+    // Init Message object
+    $message = new Message();
+    
+    // Adding a section
+    $block   = new Section();
+    $block->setText(new MarkdownText('John Doe submitted a feedback!'));
+    $message->addBlock($block);
+    
+    // Adding a divider
+    $message->addBlock(new Divider());
+
+    $block   = new Section();
+    $block->setText(new MarkdownText(':new: *You guys are awesome. Keep up the good work!*'));
+    $message->addBlock($block);
+
+    $block   = new Section();
+    $block->setText(new MarkdownText('*Source* :information_source: Homepage Feedback Form'));
+    $message->addBlock($block);
+
+    $block   = new Section();
+    $block->setText(new MarkdownText('*In the last 30 days*'));
+    $block->addField(new MarkdownText('Submitted 6 form submissions'));
+    $block->addField(new MarkdownText('Rated 12 products'));
+    $accessory = new Image('https://i.ibb.co/19W2sdD/stat.png', 'Stats');
+    $block->setAccessory($accessory);
+    $message->addBlock($block);
+
+    $message->addBlock(new Divider());
+
+    $block   = new Section();
+    $block->setText(new MarkdownText('More information about this user'));
+    $block->setAccessory(new Button(
+        'https://yourwebsite/user/123/profile/', 
+        ':bust_in_silhouette: View User'  
+    ));
+    $message->addBlock($block);
+
+    // Replace parameter below with webhook of channel you would like to post to
+    $message->send('https://hooks.slack.com/services/....');
+}
+```
+
 ### Screenshot
 ![Sample message screenshot](screenshot.png "Sample message screenshot")

src/Button.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace AmirIskander\SlackNotifier;
+
+class Button extends Accessory
+{
+    public function __construct(string $url, string $text, ?string $alt = null)
+    {
+        parent::__construct('button');
+        $this
+            ->setUrl($url)
+            ->setText(new PlainText($text))
+            ->setAltText($alt)
+        ;
+    }
+}

src/Divider.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace AmirIskander\SlackNotifier;
+
+class Divider extends Block
+{
+    public function __construct()
+    {
+        parent::__construct('divider');
+    }
+}

src/Image.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace AmirIskander\SlackNotifier;
+
+class Image extends Accessory
+{
+    public function __construct(string $url, ?string $alt = null)
+    {
+        parent::__construct('image');
+        $this
+            ->setImageUrl($url)
+            ->setAltText($alt)
+        ;
+    }
+}

src/MarkdownText.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace AmirIskander\SlackNotifier;
+
+class MarkdownText extends Text
+{
+    public function __construct(string $text)
+    {
+        parent::__construct('mrkdwn', $text);
+    }
+}

src/Message.php

@@ -84,14 +84,13 @@ public function send(string $webhookUrl)
 
         // Create CURL HTTP POST request
         $ch = curl_init($webhookUrl);
-
         curl_setopt($ch, CURLOPT_POST, 1);
         curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
         curl_setopt($ch, CURLOPT_MAXREDIRS, 3);
         curl_setopt($ch, CURLOPT_HTTPHEADER, [
-            'Accept:  application/json',
+            'Accept: application/json',
             'Content-Type: application/json',
             'Content-Length: ' . strlen($body)
         ]);

src/PlainText.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace AmirIskander\SlackNotifier;
+
+class PlainText extends Text
+{
+    public function __construct(string $text)
+    {
+        parent::__construct('plain_text', $text);
+    }
+}

src/Section.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace AmirIskander\SlackNotifier;
+
+class Section extends Block
+{
+    public function __construct()
+    {
+        parent::__construct('section');
+    }
+}