Implement multiple phone numbers per workflow feature

Database Changes:
- Added twp_workflow_phones junction table for many-to-many relationship
- Updated activator to create and manage new table
- Maintained backward compatibility with existing phone_number field

Workflow Management:
- Added set_workflow_phone_numbers() and get_workflow_phone_numbers() methods
- Updated get_workflow_by_phone_number() to check both old and new structures
- Enhanced save/update handlers to support phone_numbers array
- Added AJAX endpoint for retrieving workflow phone numbers

User Interface:
- Replaced single phone number select with dynamic multi-select interface
- Added "Add Number" and "Remove" buttons for managing multiple numbers
- Updated workflow listing to display all assigned phone numbers
- Enhanced JavaScript for phone number management and validation

The webhook routing already supports multiple numbers since get_workflow_by_phone_number()
was updated to check both structures. This feature allows users to assign multiple
Twilio phone numbers to trigger the same workflow.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

admin/class-twp-admin.php

@@ -1476,10 +1476,14 @@ class TWP_Admin {
                     foreach ($workflows as $workflow) {
                         $workflow_data = json_decode($workflow->workflow_data, true);
                         $step_count = isset($workflow_data['steps']) ? count($workflow_data['steps']) : 0;
+                        
+                        // Get phone numbers for this workflow
+                        $phone_numbers = TWP_Workflow::get_workflow_phone_numbers($workflow->id);
+                        $phone_display = !empty($phone_numbers) ? implode(', ', $phone_numbers) : $workflow->phone_number;
                         ?>
                         <tr>
                             <td><?php echo esc_html($workflow->workflow_name); ?></td>
-                            <td><?php echo esc_html($workflow->phone_number); ?></td>
+                            <td><?php echo esc_html($phone_display); ?></td>
                             <td><?php echo $step_count; ?> steps</td>
                             <td>
                                 <span class="twp-status <?php echo $workflow->is_active ? 'active' : 'inactive'; ?>">
@@ -1510,11 +1514,17 @@ class TWP_Admin {
                             <input type="text" id="workflow-name" name="workflow_name" required>
                         </div>
                         <div>
-                            <label>Phone Number:</label>
+                            <label>Phone Numbers:</label>
-                            <select id="workflow-phone" name="phone_number" required>
+                            <div id="workflow-phone-numbers">
+                                <div class="phone-number-row">
+                                    <select name="phone_numbers[]" class="workflow-phone-select" required>
                                         <option value="">Select a phone number...</option>
                                         <!-- Will be populated via AJAX -->
                                     </select>
+                                    <button type="button" class="button add-phone-number" style="margin-left: 10px;">Add Number</button>
+                                </div>
+                            </div>
+                            <p class="description">You can assign multiple phone numbers to this workflow. All selected numbers will trigger this workflow when called.</p>
                         </div>
                         <div>
                             <label>
@@ -2913,9 +2923,27 @@ class TWP_Admin {
             }
         }
         
+        // Handle phone numbers - can be a single number (legacy) or array (new)
+        $phone_numbers = array();
+        if (isset($_POST['phone_numbers']) && is_array($_POST['phone_numbers'])) {
+            // New multi-number format
+            foreach ($_POST['phone_numbers'] as $number) {
+                $number = sanitize_text_field($number);
+                if (!empty($number)) {
+                    $phone_numbers[] = $number;
+                }
+            }
+        } elseif (isset($_POST['phone_number'])) {
+            // Legacy single number format
+            $number = sanitize_text_field($_POST['phone_number']);
+            if (!empty($number)) {
+                $phone_numbers[] = $number;
+            }
+        }
+        
         $data = array(
             'workflow_name' => sanitize_text_field($_POST['workflow_name']),
-            'phone_number' => sanitize_text_field($_POST['phone_number']),
+            'phone_number' => isset($phone_numbers[0]) ? $phone_numbers[0] : '', // Keep first number for backward compatibility
             'steps' => isset($workflow_data_parsed['steps']) ? $workflow_data_parsed['steps'] : array(),
             'conditions' => isset($workflow_data_parsed['conditions']) ? $workflow_data_parsed['conditions'] : array(),
             'actions' => isset($workflow_data_parsed['actions']) ? $workflow_data_parsed['actions'] : array(),
@@ -2927,13 +2955,21 @@ class TWP_Admin {
             $result = TWP_Workflow::update_workflow($workflow_id, $data);
         } else {
             $result = TWP_Workflow::create_workflow($data);
+            if ($result !== false) {
+                global $wpdb;
+                $workflow_id = $wpdb->insert_id;
+            }
+        }
+        
+        // Save phone numbers to junction table
+        if ($result !== false && !empty($phone_numbers)) {
+            TWP_Workflow::set_workflow_phone_numbers($workflow_id, $phone_numbers);
         }
         
         if ($result === false) {
             wp_send_json_error('Failed to save workflow to database');
         } else {
-            global $wpdb;
+            wp_send_json_success(array('success' => true, 'workflow_id' => $workflow_id));
-            wp_send_json_success(array('success' => true, 'workflow_id' => $workflow_id ?: $wpdb->insert_id));
         }
     }
     
@@ -2953,6 +2989,23 @@ class TWP_Admin {
         wp_send_json_success($workflow);
     }
     
+    /**
+     * AJAX handler for getting workflow phone numbers
+     */
+    public function ajax_get_workflow_phone_numbers() {
+        check_ajax_referer('twp_ajax_nonce', 'nonce');
+        
+        if (!current_user_can('manage_options')) {
+            wp_send_json_error('Unauthorized');
+            return;
+        }
+        
+        $workflow_id = intval($_POST['workflow_id']);
+        $phone_numbers = TWP_Workflow::get_workflow_phone_numbers($workflow_id);
+        
+        wp_send_json_success($phone_numbers);
+    }
+    
     /**
      * AJAX handler for deleting workflow
      */

assets/js/admin.js

@@ -203,7 +203,9 @@ jQuery(document).ready(function($) {
                 response.data.forEach(function(number) {
                     options += '<option value="' + number.phone_number + '">' + number.phone_number + ' (' + number.friendly_name + ')</option>';
                 });
-                $('#workflow-phone').html(options);
+                
+                // Update all workflow phone selects (legacy and new)
+                $('#workflow-phone, .workflow-phone-select').html(options);
                 
                 // Call the callback if provided
                 if (typeof callback === 'function') {
@@ -213,6 +215,20 @@ jQuery(document).ready(function($) {
         });
     }
     
+    function loadWorkflowPhoneNumbers(workflowId, callback) {
+        $.post(twp_ajax.ajax_url, {
+            action: 'twp_get_workflow_phone_numbers',
+            workflow_id: workflowId,
+            nonce: twp_ajax.nonce
+        }, function(response) {
+            if (response.success) {
+                callback(response.data);
+            } else {
+                callback([]);
+            }
+        });
+    }
+    
     // Step type button handlers
     $(document).on('click', '.step-btn', function() {
         var stepType = $(this).data('step-type');
@@ -1088,10 +1104,19 @@ jQuery(document).ready(function($) {
             return;
         }
         
+        // Collect phone numbers from all selects
+        var phoneNumbers = [];
+        $('#workflow-phone-numbers select[name="phone_numbers[]"]').each(function() {
+            var phoneNumber = $(this).val();
+            if (phoneNumber && phoneNumbers.indexOf(phoneNumber) === -1) {
+                phoneNumbers.push(phoneNumber);
+            }
+        });
+        
         var payload = {
             action: currentWorkflowId ? 'twp_update_workflow' : 'twp_save_workflow',
             workflow_name: workflowData.workflow_name,
-            phone_number: workflowData.phone_number,
+            phone_numbers: phoneNumbers,
             workflow_data: JSON.stringify({
                 steps: workflowSteps,
                 conditions: [],
@@ -1161,11 +1186,46 @@ jQuery(document).ready(function($) {
                     workflowSteps = [];
                 }
                 
-                // Load phone numbers and select the saved one
+                // Load phone numbers and set up the workflow
                 loadPhoneNumbers(function() {
+                    // Load assigned phone numbers for this workflow
+                    loadWorkflowPhoneNumbers(workflowId, function(phoneNumbers) {
+                        if (phoneNumbers && phoneNumbers.length > 0) {
+                            // Clear existing phone number inputs
+                            $('#workflow-phone-numbers').empty();
+                            
+                            // Add phone number rows
+                            phoneNumbers.forEach(function(phoneNumber, index) {
+                                if (index === 0) {
+                                    // First row with Add button
+                                    var firstRow = '<div class="phone-number-row">' +
+                                                   '<select name="phone_numbers[]" class="workflow-phone-select" required></select>' +
+                                                   '<button type="button" class="button add-phone-number" style="margin-left: 10px;">' + 
+                                                   (phoneNumbers.length === 1 ? 'Add Number' : 'Add Another Number') + '</button>' +
+                                                   '</div>';
+                                    $('#workflow-phone-numbers').append(firstRow);
+                                } else {
+                                    // Additional rows with Remove button
+                                    var additionalRow = '<div class="phone-number-row" style="margin-top: 10px;">' +
+                                                        '<select name="phone_numbers[]" class="workflow-phone-select"></select>' +
+                                                        '<button type="button" class="button remove-phone-number" style="margin-left: 10px; background: #d63638; color: white;">Remove</button>' +
+                                                        '</div>';
+                                    $('#workflow-phone-numbers').append(additionalRow);
+                                }
+                            });
+                            
+                            // Repopulate selects and set values
+                            loadPhoneNumbers(function() {
+                                phoneNumbers.forEach(function(phoneNumber, index) {
+                                    $('#workflow-phone-numbers .phone-number-row').eq(index).find('select').val(phoneNumber);
+                                });
+                            });
+                        } else {
+                            // Fallback to legacy phone number field
                             $('#workflow-phone').val(phoneNumberToSelect);
-                    // Trigger change event in case there are any listeners
                             $('#workflow-phone').trigger('change');
+                        }
+                    });
                 });
                 updateWorkflowDisplay();
             } else {
@@ -2386,6 +2446,36 @@ jQuery(document).ready(function($) {
         }
     };
     
+    // Phone Number Management for Workflows
+    $(document).on('click', '.add-phone-number', function() {
+        var phoneNumbers = [];
+        var $container = $('#workflow-phone-numbers');
+        
+        // Get available phone numbers from first select
+        var $firstSelect = $container.find('select').first();
+        var availableOptions = $firstSelect.html();
+        
+        var newRow = '<div class="phone-number-row" style="margin-top: 10px;">' +
+                     '<select name="phone_numbers[]" class="workflow-phone-select">' + availableOptions + '</select>' +
+                     '<button type="button" class="button remove-phone-number" style="margin-left: 10px; background: #d63638; color: white;">Remove</button>' +
+                     '</div>';
+        
+        $container.append(newRow);
+        
+        // Update button text on first row
+        $container.find('.add-phone-number').first().text('Add Another Number');
+    });
+    
+    $(document).on('click', '.remove-phone-number', function() {
+        var $container = $('#workflow-phone-numbers');
+        $(this).closest('.phone-number-row').remove();
+        
+        // Update button text if only one row remains
+        if ($container.find('.phone-number-row').length === 1) {
+            $container.find('.add-phone-number').first().text('Add Number');
+        }
+    });
+
     // Callback Management Functions
     window.requestCallback = function() {
         var phoneNumber = prompt('Enter phone number for callback (e.g., +1234567890):');

includes/class-twp-activator.php

@@ -37,6 +37,7 @@ class TWP_Activator {
             'twp_call_queues',
             'twp_queued_calls',
             'twp_workflows',
+            'twp_workflow_phones',
             'twp_call_log',
             'twp_sms_log',
             'twp_voicemails',
@@ -137,7 +138,7 @@ class TWP_Activator {
             KEY status (status)
         ) $charset_collate;";
         
-        // Workflows table
+        // Workflows table (keeping phone_number for backward compatibility, will be deprecated)
         $table_workflows = $wpdb->prefix . 'twp_workflows';
         $sql_workflows = "CREATE TABLE $table_workflows (
             id int(11) NOT NULL AUTO_INCREMENT,
@@ -151,6 +152,19 @@ class TWP_Activator {
             KEY phone_number (phone_number)
         ) $charset_collate;";
         
+        // Workflow phone numbers junction table
+        $table_workflow_phones = $wpdb->prefix . 'twp_workflow_phones';
+        $sql_workflow_phones = "CREATE TABLE $table_workflow_phones (
+            id int(11) NOT NULL AUTO_INCREMENT,
+            workflow_id int(11) NOT NULL,
+            phone_number varchar(20) NOT NULL,
+            created_at datetime DEFAULT CURRENT_TIMESTAMP,
+            PRIMARY KEY (id),
+            UNIQUE KEY workflow_phone (workflow_id, phone_number),
+            KEY workflow_id (workflow_id),
+            KEY phone_number (phone_number)
+        ) $charset_collate;";
+        
         // Call log table
         $table_call_log = $wpdb->prefix . 'twp_call_log';
         $sql_call_log = "CREATE TABLE $table_call_log (
@@ -274,6 +288,7 @@ class TWP_Activator {
         dbDelta($sql_queues);
         dbDelta($sql_queued_calls);
         dbDelta($sql_workflows);
+        dbDelta($sql_workflow_phones);
         dbDelta($sql_call_log);
         dbDelta($sql_sms_log);
         dbDelta($sql_voicemails);

includes/class-twp-core.php

@@ -127,6 +127,7 @@ class TWP_Core {
         $this->loader->add_action('wp_ajax_twp_save_workflow', $plugin_admin, 'ajax_save_workflow');
         $this->loader->add_action('wp_ajax_twp_update_workflow', $plugin_admin, 'ajax_save_workflow');
         $this->loader->add_action('wp_ajax_twp_get_workflow', $plugin_admin, 'ajax_get_workflow');
+        $this->loader->add_action('wp_ajax_twp_get_workflow_phone_numbers', $plugin_admin, 'ajax_get_workflow_phone_numbers');
         $this->loader->add_action('wp_ajax_twp_delete_workflow', $plugin_admin, 'ajax_delete_workflow');
         
         // Phone number management AJAX

includes/class-twp-workflow.php

@@ -1084,15 +1084,31 @@ class TWP_Workflow {
     
     /**
      * Get workflow by phone number
+     * Now checks both the legacy phone_number field and the new junction table
      */
     public static function get_workflow_by_phone_number($phone_number) {
         global $wpdb;
-        $table_name = $wpdb->prefix . 'twp_workflows';
+        $workflows_table = $wpdb->prefix . 'twp_workflows';
+        $phones_table = $wpdb->prefix . 'twp_workflow_phones';
         
-        return $wpdb->get_row($wpdb->prepare(
+        // First check the new junction table
-            "SELECT * FROM $table_name WHERE phone_number = %s AND is_active = 1 ORDER BY created_at DESC LIMIT 1",
+        $workflow = $wpdb->get_row($wpdb->prepare(
+            "SELECT w.* FROM $workflows_table w
+             INNER JOIN $phones_table p ON w.id = p.workflow_id
+             WHERE p.phone_number = %s AND w.is_active = 1
+             ORDER BY w.created_at DESC LIMIT 1",
             $phone_number
         ));
+        
+        // If not found, fall back to legacy phone_number field
+        if (!$workflow) {
+            $workflow = $wpdb->get_row($wpdb->prepare(
+                "SELECT * FROM $workflows_table WHERE phone_number = %s AND is_active = 1 ORDER BY created_at DESC LIMIT 1",
+                $phone_number
+            ));
+        }
+        
+        return $workflow;
     }
     
     /**
@@ -1145,11 +1161,71 @@ class TWP_Workflow {
     public static function delete_workflow($workflow_id) {
         global $wpdb;
         $table_name = $wpdb->prefix . 'twp_workflows';
+        $phones_table = $wpdb->prefix . 'twp_workflow_phones';
         
+        // Delete phone numbers first
+        $wpdb->delete($phones_table, array('workflow_id' => $workflow_id), array('%d'));
+        
+        // Then delete workflow
         return $wpdb->delete(
             $table_name,
             array('id' => $workflow_id),
             array('%d')
         );
     }
+    
+    /**
+     * Set phone numbers for a workflow
+     */
+    public static function set_workflow_phone_numbers($workflow_id, $phone_numbers) {
+        global $wpdb;
+        $phones_table = $wpdb->prefix . 'twp_workflow_phones';
+        
+        // Remove existing phone numbers for this workflow
+        $wpdb->delete($phones_table, array('workflow_id' => $workflow_id));
+        
+        // Add new phone numbers
+        foreach ($phone_numbers as $phone_number) {
+            if (!empty($phone_number)) {
+                $wpdb->insert(
+                    $phones_table,
+                    array(
+                        'workflow_id' => $workflow_id,
+                        'phone_number' => $phone_number
+                    )
+                );
+            }
+        }
+        
+        return true;
+    }
+    
+    /**
+     * Get phone numbers for a workflow
+     */
+    public static function get_workflow_phone_numbers($workflow_id) {
+        global $wpdb;
+        $phones_table = $wpdb->prefix . 'twp_workflow_phones';
+        
+        $numbers = $wpdb->get_col($wpdb->prepare(
+            "SELECT phone_number FROM $phones_table WHERE workflow_id = %d",
+            $workflow_id
+        ));
+        
+        // If no numbers in junction table, check legacy field
+        if (empty($numbers)) {
+            $workflows_table = $wpdb->prefix . 'twp_workflows';
+            $legacy_number = $wpdb->get_var($wpdb->prepare(
+                "SELECT phone_number FROM $workflows_table WHERE id = %d",
+                $workflow_id
+            ));
+            if ($legacy_number) {
+                $numbers = array($legacy_number);
+                // Optionally migrate to new structure
+                self::set_workflow_phone_numbers($workflow_id, $numbers);
+            }
+        }
+        
+        return $numbers;
+    }
 }