122 lines
3.9 KiB
PHP
122 lines
3.9 KiB
PHP
<?php
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namespace App\Models;
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use App\Core\Database;
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use App\Core\Security;
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/**
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* ConversationState Model
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* Manages conversation states for multi-step bot flows.
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*/
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class ConversationState extends BaseModel
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{
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protected static string $table = 'conversation_states';
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/**
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* Find active conversation state for a company and contact phone
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*/
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public static function findActive(int $companyId, string $phone): ?array
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{
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self::ensureTableExists();
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$hash = Security::blindIndex($phone);
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$now = date('Y-m-d H:i:s');
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$state = Database::selectOne(
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"SELECT * FROM " . static::$table . " WHERE company_id = ? AND contact_phone_hash = ? AND expires_at > ? LIMIT 1",
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[$companyId, $hash, $now]
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);
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return self::decryptState($state);
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}
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/**
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* Save or update conversation state securely
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*/
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public static function saveState(array $data): string
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{
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self::ensureTableExists();
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if (!empty($data['contact_phone'])) {
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$data['contact_phone_hash'] = Security::blindIndex($data['contact_phone']);
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$data['contact_phone'] = Security::encrypt($data['contact_phone']);
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}
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$existing = Database::selectOne(
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"SELECT id FROM " . static::$table . " WHERE company_id = ? AND contact_phone_hash = ? LIMIT 1",
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[$data['company_id'], $data['contact_phone_hash']]
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);
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if ($existing) {
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self::update($existing['id'], $data);
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return $existing['id'];
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} else {
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return self::create($data);
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}
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}
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/**
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* Delete conversation state by ID
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*/
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public static function deleteState(int $id): int
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{
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self::ensureTableExists();
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return self::delete($id);
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}
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/**
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* Clean up all expired states
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*/
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public static function cleanExpired(): void
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{
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self::ensureTableExists();
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try {
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$now = date('Y-m-d H:i:s');
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Database::execute("DELETE FROM " . static::$table . " WHERE expires_at < ?", [$now]);
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} catch (\Exception $e) {
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error_log("Failed to clean expired conversation states: " . $e->getMessage());
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}
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}
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/**
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* Helper to decrypt sensitive fields
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*/
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private static function decryptState(?array $state): ?array
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{
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if ($state) {
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$state['contact_phone'] = !empty($state['contact_phone']) ? Security::decrypt($state['contact_phone']) : null;
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}
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return $state;
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}
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/**
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* Ensure the conversation_states table exists in the database
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*/
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public static function ensureTableExists(): void
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{
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static $checked = false;
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if ($checked) return;
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try {
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Database::execute("
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CREATE TABLE IF NOT EXISTS `conversation_states` (
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`id` INT AUTO_INCREMENT PRIMARY KEY,
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`company_id` INT NOT NULL,
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`contact_phone` VARCHAR(512) NOT NULL,
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`contact_phone_hash` VARCHAR(64) NOT NULL,
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`flow_name` VARCHAR(100) NOT NULL,
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`current_step` VARCHAR(100) NOT NULL,
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`context_data` JSON DEFAULT NULL,
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`expires_at` TIMESTAMP NOT NULL,
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`created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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`updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
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UNIQUE KEY `unique_company_contact` (`company_id`, `contact_phone_hash`),
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FOREIGN KEY (`company_id`) REFERENCES `companies` (`id`) ON DELETE CASCADE,
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INDEX `idx_conv_expires` (`expires_at`)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
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");
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$checked = true;
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} catch (\Exception $e) {
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error_log("Failed to ensure conversation_states table: " . $e->getMessage());
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}
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}
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}
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