sodino/database/migrations.php

<?php
// Prevent direct access
if (!defined('ABSPATH')) {
    exit;
}

/**
 * Database migrations for Sodino plugin
 */
function sodino_create_tables() {
    global $wpdb;

    $charset_collate = $wpdb->get_charset_collate();
    $current_version = get_option('sodino_db_version', '0');

    // Rules table
    $rules_table = $wpdb->prefix . 'sodino_rules';
    $rules_sql = "CREATE TABLE $rules_table (
        id mediumint(9) NOT NULL AUTO_INCREMENT,
        name varchar(255) NOT NULL,
        conditions longtext NOT NULL,
        actions longtext NOT NULL,
        priority int(11) NOT NULL DEFAULT 10,
        usage_limit int(11) NOT NULL DEFAULT 0,
        usage_count int(11) NOT NULL DEFAULT 0,
        user_roles varchar(255) DEFAULT '',
        start_date datetime NULL,
        end_date datetime NULL,
        enabled tinyint(1) DEFAULT 1,
        created_at datetime DEFAULT CURRENT_TIMESTAMP,
        updated_at datetime DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
        PRIMARY KEY (id),
        KEY enabled_priority (enabled, priority),
        KEY start_end_dates (start_date, end_date)
    ) $charset_collate;";

    // Events table
    $events_table = $wpdb->prefix . 'sodino_events';
    $events_sql = "CREATE TABLE $events_table (
        id bigint(20) NOT NULL AUTO_INCREMENT,
        event_type varchar(100) NOT NULL,
        product_id mediumint(9) DEFAULT NULL,
        variation_id mediumint(9) DEFAULT NULL,
        user_id bigint(20) DEFAULT NULL,
        session_id varchar(255) DEFAULT NULL,
        rule_id mediumint(9) DEFAULT NULL,
        value decimal(10,2) DEFAULT 0,
        discount_value decimal(10,2) DEFAULT 0,
        metadata longtext DEFAULT NULL,
        created_at datetime DEFAULT CURRENT_TIMESTAMP,
        PRIMARY KEY (id),
        KEY event_type_created (event_type, created_at),
        KEY product_id (product_id),
        KEY rule_id (rule_id),
        KEY session_id (session_id),
        KEY created_at (created_at)
    ) $charset_collate;";

    // Upsell table
    $upsell_table = $wpdb->prefix . 'sodino_upsells';
    $upsell_sql = "CREATE TABLE $upsell_table (
        id mediumint(9) NOT NULL AUTO_INCREMENT,
        title varchar(255) NOT NULL,
        trigger_type varchar(50) NOT NULL,
        trigger_value varchar(255) NOT NULL,
        target_product_id bigint(20) NOT NULL DEFAULT 0,
        discount_type varchar(50) DEFAULT 'percentage',
        discount_value decimal(10,2) DEFAULT 0,
        status tinyint(1) DEFAULT 1,
        priority int(11) NOT NULL DEFAULT 10,
        impressions bigint(20) NOT NULL DEFAULT 0,
        conversions bigint(20) NOT NULL DEFAULT 0,
        created_at datetime DEFAULT CURRENT_TIMESTAMP,
        updated_at datetime DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
        PRIMARY KEY (id),
        KEY status_priority (status, priority),
        KEY trigger_type (trigger_type)
    ) $charset_collate;";

    // Banner table
    $banner_table = $wpdb->prefix . 'sodino_banners';
    $banner_sql = "CREATE TABLE $banner_table (
        id mediumint(9) NOT NULL AUTO_INCREMENT,
        title varchar(255) NOT NULL,
        content_type varchar(50) NOT NULL DEFAULT 'image',
        content_value longtext NOT NULL,
        link_url varchar(255) DEFAULT NULL,
        position varchar(50) NOT NULL DEFAULT 'top',
        display_type varchar(50) NOT NULL DEFAULT 'inline',
        start_time datetime DEFAULT NULL,
        end_time datetime DEFAULT NULL,
        user_target varchar(50) NOT NULL DEFAULT 'all',
        device_target varchar(50) NOT NULL DEFAULT 'all',
        priority int(11) NOT NULL DEFAULT 10,
        status tinyint(1) NOT NULL DEFAULT 1,
        impressions bigint(20) NOT NULL DEFAULT 0,
        clicks bigint(20) NOT NULL DEFAULT 0,
        created_at datetime DEFAULT CURRENT_TIMESTAMP,
        updated_at datetime DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
        PRIMARY KEY (id),
        KEY status_priority (status, priority),
        KEY position (position),
        KEY start_end_time (start_time, end_time)
    ) $charset_collate;";

    // Analytics cache table
    $analytics_table = $wpdb->prefix . 'sodino_analytics_cache';
    $analytics_sql = "CREATE TABLE $analytics_table (
        id bigint(20) NOT NULL AUTO_INCREMENT,
        cache_key varchar(255) NOT NULL,
        cache_value longtext NOT NULL,
        cache_group varchar(100) NOT NULL DEFAULT 'general',
        expires_at datetime NOT NULL,
        created_at datetime DEFAULT CURRENT_TIMESTAMP,
        PRIMARY KEY (id),
        UNIQUE KEY cache_key_group (cache_key, cache_group),
        KEY expires_at (expires_at)
    ) $charset_collate;";

    require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
    dbDelta($rules_sql);
    dbDelta($events_sql);
    dbDelta($upsell_sql);
    dbDelta($banner_sql);
    dbDelta($analytics_sql);

    // Run migrations
    sodino_run_migrations($current_version);

    // Add version option
    update_option('sodino_db_version', '2.0');
}

/**
 * Run incremental migrations
 */
function sodino_run_migrations($from_version) {
    global $wpdb;
    
    // Migration from 1.x to 2.0
    if (version_compare($from_version, '2.0', '<')) {
        // Add usage_count column if not exists
        $rules_table = $wpdb->prefix . 'sodino_rules';
        $column_exists = $wpdb->get_results("SHOW COLUMNS FROM {$rules_table} LIKE 'usage_count'");
        
        if (empty($column_exists)) {
            $wpdb->query("ALTER TABLE {$rules_table} ADD COLUMN usage_count int(11) NOT NULL DEFAULT 0 AFTER usage_limit");
        }
        
        // Remove deprecated columns
        $deprecated_columns = ['condition_type', 'condition_value', 'action_type', 'action_value'];
        foreach ($deprecated_columns as $col) {
            $col_exists = $wpdb->get_results("SHOW COLUMNS FROM {$rules_table} LIKE '{$col}'");
            if (!empty($col_exists)) {
                $wpdb->query("ALTER TABLE {$rules_table} DROP COLUMN {$col}");
            }
        }
        
        // Add indexes for better performance
        $wpdb->query("ALTER TABLE {$rules_table} ADD INDEX enabled_priority (enabled, priority)");
        $wpdb->query("ALTER TABLE {$rules_table} ADD INDEX start_end_dates (start_date, end_date)");
    }
}