removing unneeded files from repo and plugin

docs/developer-integration-guide.md

@@ -8,7 +8,33 @@ This guide shows developers how to integrate their WordPress plugins with the WP
 
 Download `wpdd-plugin-updater.php` from your product page and include it in your plugin.
 
-### 2. Basic Integration
+### 2. Minimal Integration
+
+For the simplest integration with automatic license management:
+
+```php
+<?php
+/**
+ * Plugin Name: My Plugin
+ * Version: 1.0.0
+ */
+
+// Initialize updater with automatic settings page
+if (!class_exists('WPDD_Plugin_Updater') && is_admin()) {
+    require_once plugin_dir_path(__FILE__) . 'includes/wpdd-plugin-updater.php';
+    
+    new WPDD_Plugin_Updater(
+        __FILE__,
+        get_option('my_plugin_license_key', ''),
+        'https://your-store.com',
+        array('add_settings_page' => true)
+    );
+}
+```
+
+This creates a license settings page under Settings → My Plugin License.
+
+### 3. Full Integration
 
 ```php
 <?php
@@ -17,8 +43,10 @@ Download `wpdd-plugin-updater.php` from your product page and include it in your
  * Version: 1.0.0
  */
 
-// Include the WPDD updater library
-require_once plugin_dir_path(__FILE__) . 'includes/wpdd-plugin-updater.php';
+// Include the WPDD updater library (check if class exists to avoid conflicts)
+if (!class_exists('WPDD_Plugin_Updater')) {
+    require_once plugin_dir_path(__FILE__) . 'includes/wpdd-plugin-updater.php';
+}
 
 class My_Awesome_Plugin {
     
@@ -68,13 +96,18 @@ class My_Plugin_Settings {
     }
     
     private function init_updater() {
+        // Check if updater class exists
+        if (!class_exists('WPDD_Plugin_Updater')) {
+            return;
+        }
+        
         $license_key = get_option('my_plugin_license_key', '');
         
         $this->updater = new WPDD_Plugin_Updater(
-            MY_PLUGIN_FILE,
+            MY_PLUGIN_FILE,                             // Define this constant to your main plugin file
             $license_key,
             'https://your-store.com',
-            array('add_settings_page' => false) // We'll handle settings ourselves
+            array('add_settings_page' => false)         // We'll handle settings ourselves
         );
     }
     
@@ -102,7 +135,7 @@ class My_Plugin_Settings {
     
     public function render_license_section() {
         $license_key = get_option('my_plugin_license_key', '');
-        $is_valid = $this->updater->validate_license();
+        $is_valid = $this->updater ? $this->updater->validate_license() : false;
         
         ?>
         <h3>License Settings</h3>
@@ -150,6 +183,11 @@ class My_Premium_Feature {
     private $updater;
     
     public function __construct() {
+        // Include updater if not already loaded
+        if (!class_exists('WPDD_Plugin_Updater')) {
+            require_once plugin_dir_path(__FILE__) . 'includes/wpdd-plugin-updater.php';
+        }
+        
         $license_key = get_option('my_plugin_license_key', '');
         
         $this->updater = new WPDD_Plugin_Updater(
@@ -167,7 +205,8 @@ class My_Premium_Feature {
     }
     
     private function is_license_valid() {
-        return $this->updater->validate_license();
+        // Check if updater exists and validate license
+        return $this->updater ? $this->updater->validate_license() : false;
     }
     
     private function enable_premium_features() {
@@ -195,14 +234,20 @@ class My_Premium_Feature {
 
 ### WPDD_Plugin_Updater Class
 
+#### Requirements
+
+- **WordPress**: 5.0 or higher
+- **PHP**: 7.0 or higher
+- **Plugin Version Header**: Your main plugin file must include a Version header
+
 #### Constructor Parameters
 
 ```php
 new WPDD_Plugin_Updater($plugin_file, $license_key, $update_server, $args);
 ```
 
-- **$plugin_file** (string) - Full path to your main plugin file
-- **$license_key** (string) - The user's license key
+- **$plugin_file** (string) - Full path to your main plugin file (typically `__FILE__`)
+- **$license_key** (string) - The user's license key (can be empty string)
 - **$update_server** (string) - URL to your store (e.g., 'https://your-store.com')
 - **$args** (array) - Optional arguments:
   - `add_settings_page` (bool) - Auto-create license settings page (default: false)
@@ -352,10 +397,18 @@ Then visit: `wp-admin/plugins.php?force_update_check=1`
 Always handle API failures gracefully:
 
 ```php
+// Check if updater was initialized properly
+if (!$this->updater) {
+    // Handle initialization failure
+    error_log('WPDD Updater failed to initialize');
+    return;
+}
+
 $result = $updater->validate_license();
 if ($result === false) {
     // Network error or server down - allow functionality to continue
     // but maybe show a notice
+    error_log('License validation failed - network or server issue');
 }
 ```
 
@@ -388,13 +441,50 @@ if ($this->is_license_valid()) {
 }
 ```
 
+## What's New in Version 1.1.0
+
+The updated `wpdd-plugin-updater.php` includes several improvements:
+
+### Enhanced Error Handling
+- Better HTTP request error handling with status code checking
+- JSON validation to prevent parsing errors
+- Improved timeout handling (30 seconds default)
+- More detailed error logging for debugging
+
+### Improved Compatibility
+- Better API response structure handling
+- Flexible URL checking for package downloads
+- Support for different server configurations
+- Fallback values for missing data fields
+
+### Security Enhancements
+- SSL verification enabled by default
+- Proper input validation in constructor
+- Safe handling of network failures
+
+### Performance Improvements
+- 12-hour caching for update checks
+- Optimized HTTP requests with proper headers
+- Reduced unnecessary API calls
+
 ## Troubleshooting
 
 ### Common Issues
 
-1. **Updates not showing:** Check that the plugin slug matches the product slug in your store
-2. **License validation fails:** Ensure the update server URL is correct and accessible
-3. **Download fails:** Verify the license is activated and not expired
+1. **Updates not showing:** 
+   - Check that the plugin slug matches the product slug in your store
+   - Verify the plugin file has a proper Version header
+   - Clear update transients using the force update check method
+
+2. **License validation fails:** 
+   - Ensure the update server URL is correct and accessible
+   - Check that the license key is properly formatted
+   - Verify SSL certificates are valid on your server
+
+3. **Download fails:** 
+   - Verify the license is activated and not expired
+   - Check activation limits haven't been exceeded
+   - Ensure the package file exists on the server
 
 ### Debug Mode