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import { logger } from "@/lib/logging";
import type {
WorkflowStepConfig,
WorkflowExecutionContext,
StepExecutionResult,
SendEmailStepConfig,
WaitDelayStepConfig,
WaitUntilStepConfig,
ConditionStepConfig,
SplitABStepConfig,
UpdateSegmentStepConfig,
AddPointsStepConfig,
ApplyCouponStepConfig,
WebhookStepConfig,
ConditionGroup,
ConditionRule } from "./types";
const LOG_CATEGORY = "WORKFLOW_STEP_EXECUTOR";
/**
* Execute a workflow step
*/
export async function executeStep(
step: WorkflowStepConfig,
context: WorkflowExecutionContext
): Promise<StepExecutionResult> {
try {
switch (step.type) {
case "SEND_EMAIL":
return await executeSendEmail(
step.config as SendEmailStepConfig,
context
);
case "WAIT_DELAY":
return await executeWaitDelay(
step.config as WaitDelayStepConfig,
context
);
case "WAIT_UNTIL":
return await executeWaitUntil(
step.config as WaitUntilStepConfig,
context
);
case "CONDITION":
return await executeCondition(
step.config as ConditionStepConfig,
context
);
case "SPLIT_AB":
return await executeSplitAB(step.config as SplitABStepConfig, context);
case "UPDATE_SEGMENT":
return await executeUpdateSegment(
step.config as UpdateSegmentStepConfig,
context
);
case "ADD_POINTS":
return await executeAddPoints(
step.config as AddPointsStepConfig,
context
);
case "APPLY_COUPON":
return await executeApplyCoupon(
step.config as ApplyCouponStepConfig,
context
);
case "WEBHOOK":
return await executeWebhook(step.config as WebhookStepConfig, context);
case "END":
return { success: true, data: { ended: true } };
case "SEND_SMS":
case "SEND_PUSH":
// These would require additional integrations
logger.warn(`Step type ${step.type} not yet implemented`, { category: LOG_CATEGORY });
return { success: true, data: { skipped: true } };
default:
return { success: false, error: `Unknown step type: ${step.type}` };
}
} catch (error) {
const message = error instanceof Error ? error.message : "Unknown error";
logger.error(`Step execution failed: ${message}`, error instanceof Error ? error : new Error(String(error)), { category: LOG_CATEGORY });
return { success: false, error: message };
}
}
/**
* Send an email
*/
async function executeSendEmail(
config: SendEmailStepConfig,
context: WorkflowExecutionContext
): Promise<StepExecutionResult> {
try {
// Get user data for personalization
const user = await prisma.user.findUnique({
where: { id: context.userId }});
if (!user) {
return { success: false, error: "User not found" };
}
let subject = config.subject || "";
let body = config.body || "";
// If using template, fetch it
if (config.templateId) {
const template = await prisma.emailTemplate.findUnique({
where: { id: config.templateId }});
if (template) {
subject = template.subject;
body = template.bodyHtml || template.body;
}
}
// Replace template variables
const variables = {
...config.variables,
user_name: user.name || "Customer",
user_email: user.email,
...context.variables};
subject = replaceVariables(subject, variables);
body = replaceVariables(body, variables);
// TODO: Actually send the email using your email service
// For now, just log it
logger.info(`Would send email to ${user.email}`, {
category: LOG_CATEGORY,
subject,
bodyLength: body.length});
return {
success: true,
data: {
emailSent: true,
to: user.email,
subject}};
} catch (error) {
const message = error instanceof Error ? error.message : "Unknown error";
return { success: false, error: `Email send failed: ${message}` };
}
}
/**
* Wait for a delay
*/
async function executeWaitDelay(
config: WaitDelayStepConfig,
// eslint-disable-next-line @typescript-eslint/no-unused-vars
_context: WorkflowExecutionContext
): Promise<StepExecutionResult> {
const multipliers: Record<string, number> = {
seconds: 1000,
minutes: 60 * 1000,
hours: 60 * 60 * 1000,
days: 24 * 60 * 60 * 1000};
const multiplier = multipliers[config.unit] || 1000;
const delayMs = config.duration * multiplier;
const waitUntil = new Date(Date.now() + delayMs);
return {
success: true,
shouldWait: true,
waitUntil,
data: { delayMs, waitUntil: waitUntil.toISOString() }};
}
/**
* Wait until a specific time
*/
async function executeWaitUntil(
config: WaitUntilStepConfig,
// eslint-disable-next-line @typescript-eslint/no-unused-vars
_context: WorkflowExecutionContext
): Promise<StepExecutionResult> {
const waitUntil = new Date(config.time);
if (waitUntil <= new Date()) {
// Time already passed, continue immediately
return { success: true, data: { waited: false } };
}
return {
success: true,
shouldWait: true,
waitUntil,
data: { waitUntil: waitUntil.toISOString() }};
}
/**
* Evaluate a condition
*/
async function executeCondition(
config: ConditionStepConfig,
context: WorkflowExecutionContext
): Promise<StepExecutionResult> {
try {
// Get user data for evaluation
const user = await prisma.user.findUnique({
where: { id: context.userId },
include: {
orders: true,
loyalty: true}});
if (!user) {
return { success: false, error: "User not found" };
}
// Build evaluation context
const evalContext: Record<string, unknown> = {
user_id: user.id,
user_email: user.email,
user_name: user.name,
order_count: user.orders.length,
total_spent: user.orders.reduce((sum, o) => sum + o.total, 0),
loyalty_points: user.loyalty?.totalPoints || 0,
loyalty_tier: user.loyalty?.currentTierId || null,
...context.triggerData,
...context.stepData};
// Evaluate conditions
const result = evaluateConditionGroups(config.conditions, evalContext);
return {
success: true,
nextStepId: result ? config.trueConnectionId : config.falseConnectionId,
data: { conditionResult: result }};
} catch (error) {
const message = error instanceof Error ? error.message : "Unknown error";
return { success: false, error: `Condition evaluation failed: ${message}` };
}
}
/**
* Evaluate condition groups (AND between groups)
*/
function evaluateConditionGroups(
groups: ConditionGroup[],
context: Record<string, unknown>
): boolean {
for (const group of groups) {
const groupResult = evaluateConditionGroup(group, context);
if (!groupResult) return false; // All groups must pass (AND)
}
return true;
}
/**
* Evaluate a single condition group
*/
function evaluateConditionGroup(
group: ConditionGroup,
context: Record<string, unknown>
): boolean {
if (group.logic === "OR") {
return group.rules.some((rule) => evaluateRule(rule, context));
}
return group.rules.every((rule) => evaluateRule(rule, context));
}
/**
* Evaluate a single condition rule
*/
function evaluateRule(
rule: ConditionRule,
context: Record<string, unknown>
): boolean {
const fieldValue = context[rule.field];
const compareValue = rule.value;
switch (rule.operator) {
case "equals":
return fieldValue === compareValue;
case "not_equals":
return fieldValue !== compareValue;
case "greater_than":
return Number(fieldValue) > Number(compareValue);
case "less_than":
return Number(fieldValue) < Number(compareValue);
case "contains":
return String(fieldValue).includes(String(compareValue));
case "not_contains":
return !String(fieldValue).includes(String(compareValue));
case "is_empty":
return fieldValue === null || fieldValue === undefined || fieldValue === "";
case "is_not_empty":
return fieldValue !== null && fieldValue !== undefined && fieldValue !== "";
case "in":
return Array.isArray(compareValue) && compareValue.includes(fieldValue);
case "not_in":
return Array.isArray(compareValue) && !compareValue.includes(fieldValue);
default:
return false;
}
}
/**
* A/B test split
*/
async function executeSplitAB(
config: SplitABStepConfig,
context: WorkflowExecutionContext
): Promise<StepExecutionResult> {
// Use user ID to deterministically assign variant
const hash = context.userId % 100;
let cumulative = 0;
for (const variant of config.variants) {
cumulative += variant.percentage;
if (hash < cumulative) {
return {
success: true,
nextStepId: variant.connectionId,
data: { variant: variant.id, variantName: variant.name }};
}
}
// Default to first variant
const defaultVariant = config.variants[0];
return {
success: true,
nextStepId: defaultVariant?.connectionId,
data: { variant: defaultVariant?.id }};
}
/**
* Update segment membership
*/
async function executeUpdateSegment(
config: UpdateSegmentStepConfig,
context: WorkflowExecutionContext
): Promise<StepExecutionResult> {
// Segments are dynamic based on rules, so this is informational
// In a real implementation, you might have a static segment membership table
logger.info(`Would ${config.action} user ${context.userId} to segment ${config.segmentId}`, { category: LOG_CATEGORY });
return {
success: true,
data: {
action: config.action,
segmentId: config.segmentId}};
}
/**
* Add loyalty points
*/
async function executeAddPoints(
config: AddPointsStepConfig,
context: WorkflowExecutionContext
): Promise<StepExecutionResult> {
try {
// Find user's loyalty record
const loyalty = await prisma.customerLoyalty.findUnique({
where: { userId: context.userId }});
if (!loyalty) {
return { success: false, error: "User not enrolled in loyalty program" };
}
// Add points
await prisma.customerLoyalty.update({
where: { id: loyalty.id },
data: {
totalPoints: { increment: config.points },
lifetimePoints: { increment: config.points }}});
// Create transaction record
await prisma.loyaltyTransaction.create({
data: {
customerLoyaltyId: loyalty.id,
points: config.points,
type: "bonus",
description: config.reason || "Workflow bonus points"}});
return {
success: true,
data: { pointsAdded: config.points }};
} catch (error) {
const message = error instanceof Error ? error.message : "Unknown error";
return { success: false, error: `Failed to add points: ${message}` };
}
}
/**
* Apply/create a coupon
*/
async function executeApplyCoupon(
config: ApplyCouponStepConfig,
context: WorkflowExecutionContext
): Promise<StepExecutionResult> {
try {
let couponCode = config.couponCode;
// Generate unique code if not provided
if (!couponCode) {
couponCode = `AUTO_${context.userId}_${Date.now().toString(36).toUpperCase()}`;
}
// Check if promo code already exists
const existing = await prisma.promoCode.findUnique({
where: { code: couponCode }});
if (!existing) {
// Create a new promotion and promo code
// This is simplified - in a real implementation you'd have more configuration
logger.info(`Would create coupon ${couponCode}`, {
category: LOG_CATEGORY,
discountType: config.discountType,
discountValue: config.discountValue,
expiresIn: config.expiresIn});
}
return {
success: true,
data: {
couponCode,
discountType: config.discountType,
discountValue: config.discountValue}};
} catch (error) {
const message = error instanceof Error ? error.message : "Unknown error";
return { success: false, error: `Failed to apply coupon: ${message}` };
}
}
/**
* Call external webhook
*/
async function executeWebhook(
config: WebhookStepConfig,
context: WorkflowExecutionContext
): Promise<StepExecutionResult> {
try {
const response = await fetch(config.url, {
method: config.method,
headers: {
"Content-Type": "application/json",
...config.headers},
body:
config.method !== "GET"
? JSON.stringify({
...config.body,
userId: context.userId,
executionId: context.executionId,
workflowId: context.workflowId})
: undefined});
const data = await response.json().catch(() => ({}));
if (!response.ok) {
return {
success: false,
error: `Webhook failed with status ${response.status}`,
data};
}
return {
success: true,
data: { webhookResponse: data }};
} catch (error) {
const message = error instanceof Error ? error.message : "Unknown error";
return { success: false, error: `Webhook failed: ${message}` };
}
}
/**
* Replace template variables
*/
function replaceVariables(
text: string,
variables: Record<string, unknown>
): string {
return text.replace(/\{\{(\w+)\}\}/g, (match, key) => {
const value = variables[key];
return value !== undefined ? String(value) : match;
});
}
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