conversion: explicit event params, removes any in PixelControl

src/lib/conversion/client.ts

@@ -1,6 +1,7 @@
 import type { TrackingManager } from '$lib/tracking.svelte';
 import type {
 	ConversionErrorResponseBody,
+	ConversionEventParams,
 	ConversionRequestBody,
 	ConversionResponseBody,
 	ConversionUserData
@@ -37,7 +38,7 @@ export class ConversionClient {
 		options: {
 			eventID: string;
 			user?: Omit<ConversionUserData, 'ip' | 'fbp' | 'fbc' | 'ua'>;
-			customData?: Record<string, string>;
+			customData?: ConversionEventParams;
 		}
 	): Promise<ConversionResponseBody | ConversionErrorResponseBody> {
 		// Extract user data

src/lib/conversion/control.ts

@@ -1,6 +1,17 @@
-import { CustomData, EventRequest, ServerEvent, UserData } from 'facebook-nodejs-business-sdk';
+import {
+	Content,
+	CustomData,
+	EventRequest,
+	ServerEvent,
+	UserData
+} from 'facebook-nodejs-business-sdk';
 import type { StandardEventName } from '../types/fbq.js';
-import type { ConversionResponseBody, ConversionUserData } from '$lib/types/conversion.js';
+import type {
+	ConversionEventDetails,
+	ConversionEventParams,
+	ConversionResponseBody,
+	ConversionUserData
+} from '$lib/types/conversion.js';
 import { dev } from '$app/environment';
 import log from 'loglevel';
 
@@ -10,7 +21,7 @@ import log from 'loglevel';
  * @param data - The user data to include.
  * @returns The constructed UserData object.
  */
-export const buildConversionUserData = (data: ConversionUserData): UserData => {
+const buildUserData = (data: ConversionUserData): UserData => {
 	const userData = new UserData();
 	if (data.email) userData.setEmail(data.email);
 	if (data.phone) userData.setPhone(data.phone);
@@ -30,38 +41,39 @@ export const buildConversionUserData = (data: ConversionUserData): UserData => {
  * @param params - The custom data parameters.
  * @returns The constructed CustomData object.
  */
-export const buildCustomData = (params: Record<string, string>): CustomData => {
+const buildCustomData = (params: ConversionEventParams): CustomData => {
 	const c = new CustomData();
-	// Map known fields safely
+	if (params.value) c.setValue(params.value);
+	if (params.net_revenue) c.setNetRevenue(params.net_revenue);
 	if (params.currency) c.setCurrency(params.currency);
-	if (typeof params.value === 'number') c.setValue(params.value);
+	if (params.content_name) c.setContentName(params.content_name);
-	if (Array.isArray(params.contents)) c.setContents(params.contents);
+	if (params.content_category) c.setContentCategory(params.content_category);
-	if (params.content_type) c.setContentType(params.content_type);
+	if (params.content_ids) c.setContentIds(params.content_ids);
-	if (Array.isArray(params.content_ids)) c.setContentIds(params.content_ids);
+	if (params.contents) {
-	if (typeof params.num_items === 'number') c.setNumItems(params.num_items);
+		const contents: Content[] = params.contents.map((content) => {
-	if (params.search_string) c.setSearchString(params.search_string);
+			const c = new Content();
-	// Attach anything else as custom_properties
+			if (content.id) c.setId(content.id.toString());
-	const extras = { ...params };
+			if (content.quantity) c.setQuantity(content.quantity);
-	delete extras.currency;
+			if (content.item_price) c.setItemPrice(content.item_price);
-	delete extras.value;
+			if (content.title) c.setTitle(content.title);
-	delete extras.contents;
+			if (content.description) c.setDescription(content.description);
-	delete extras.content_type;
+			if (content.category) c.setCategory(content.category);
-	delete extras.content_ids;
+			if (content.brand) c.setBrand(content.brand);
-	delete extras.num_items;
+			if (content.delivery_category) c.setDeliveryCategory(content.delivery_category);
-	delete extras.search_string;
+			return c;
-	if (Object.keys(extras).length) c.setCustomProperties(extras);
+		});
+		c.setContents(contents);
+	}
+	if (params.content_type) c.setContentType(params.content_type);
+	if (params.order_id) c.setOrderId(params.order_id);
+	if (params.predicted_ltv) c.setPredictedLtv(params.predicted_ltv);
+	if (params.num_items) c.setNumItems(params.num_items);
+	if (params.search_string) c.setSearchString(params.search_string);
+	if (params.status) c.setStatus(params.status);
+	if (params.item_number) c.setItemNumber(params.item_number);
+	if (params.delivery_category) c.setDeliveryCategory(params.delivery_category);
+	if (params.custom_properties) c.setCustomProperties(params.custom_properties);
 	return c;
-};
-
-/**
- * Parameters for sending a conversion event to Meta Pixel.
- */
-export type ConversionEventOptions = {
-	eventID: string;
-	actionSource: 'website' | 'app' | 'offline' | 'other';
-	userData: UserData;
-	customData?: CustomData;
-	eventSourceURL?: string;
 };
 
 /**
@@ -95,17 +107,21 @@ export class ConversionControl {
 	 */
 	async trackEvent(
 		eventName: StandardEventName,
-		options: ConversionEventOptions
+		details: ConversionEventDetails,
+		params?: ConversionEventParams
 	): Promise<ConversionResponseBody> {
 		const event = new ServerEvent()
 			.setEventName(eventName)
 			.setEventTime(Math.floor(Date.now() / 1000))
-			.setEventId(options.eventID)
+			.setEventId(details.eventID)
-			.setUserData(options.userData)
+			.setUserData(buildUserData(details.userData))
-			.setActionSource(options.actionSource);
+			.setActionSource(details.actionSource);
 
-		if (options?.eventSourceURL) event.setEventSourceUrl(options.eventSourceURL);
+		if (details?.eventSourceURL) event.setEventSourceUrl(details.eventSourceURL);
-		if (options?.customData) event.setCustomData(options.customData);
+		if (params) {
+			const customData = buildCustomData(params);
+			event.setCustomData(customData);
+		}
 
 		// If we're in dev mode and missing a test event code, log and exit
 		if (dev && !this._testEventCode) {

src/lib/conversion/server.ts

@@ -1,6 +1,11 @@
 import { json, type RequestHandler } from '@sveltejs/kit';
-import { buildConversionUserData, buildCustomData, ConversionControl } from './control.ts';
+import { ConversionControl } from './control.ts';
-import type { ConversionErrorResponseBody, ConversionRequestBody } from '$lib/types/conversion.js';
+import type {
+	ConversionErrorResponseBody,
+	ConversionEventParams,
+	ConversionRequestBody,
+	ConversionUserData
+} from '$lib/types/conversion.js';
 
 import { StatusCodes } from 'http-status-codes';
 
@@ -29,32 +34,33 @@ export const createConversionRequestHandler: (control: ConversionControl) => Req
 			const ip = getEventIP(request, getClientAddress);
 			const ua = request.headers.get('user-agent');
 
-			const userData = buildConversionUserData({
+			const userData: ConversionUserData = {
 				...body.user,
 				ip,
 				ua: ua ?? body.user?.ua ?? undefined
-			});
+			};
 
 			// Build custom data with UTM params if applicable
-			let rawCustomData = body.customData ?? {};
+			let customData: ConversionEventParams = body.customData ?? {};
 			if (body.eventName === 'PageView' && body.utms) {
 				// For PageView events, automatically include UTM params if provided
-				rawCustomData = {
+				customData = {
-					...rawCustomData,
+					...customData,
 					...body.utms
 				};
 			}
 
-			const customData = buildCustomData(rawCustomData);
-
 			// Send the event via the control
-			const response = await control.trackEvent(body.eventName, {
+			const response = await control.trackEvent(
+				body.eventName,
+				{
 					eventID: body.eventID,
 					eventSourceURL: body.eventSourceURL,
 					actionSource: 'website',
-				userData,
+					userData
+				},
 				customData
-			});
+			);
 
 			return json(response, { status: StatusCodes.OK });
 		} catch (e) {

src/lib/metapixel/pixel-control.ts

@@ -12,7 +12,34 @@ import { resolveGetter, type MaybeGetter } from '../util/getter.ts';
 import log from 'loglevel';
 import { dev } from '$app/environment';
 import { ConversionClient } from '../conversion/client.ts';
+import type { ConversionEventParams } from '$lib/types/conversion.js';
 
+const pixelParamsToCustomData = (params: CommonParams & CustomParams): ConversionEventParams => {
+	const customData: ConversionEventParams = {};
+	if (params.value) customData.value = params.value;
+	if (params.currency) customData.currency = params.currency;
+	if (params.content_name) customData.content_name = params.content_name;
+	if (params.content_category) customData.content_category = params.content_category;
+	if (params.content_ids) customData.content_ids = params.content_ids;
+	if (params.contents) {
+		const acc: ConversionEventParams['contents'] = [];
+		customData.contents = params.contents.reduce((acc, content) => {
+			acc.push({
+				id: content.id.toString(),
+				quantity: content.quantity
+			});
+			return acc;
+		}, acc);
+	}
+	if (params.num_items) customData.num_items = params.num_items;
+	if (params.search_string) customData.search_string = params.search_string;
+	if (params.predicted_ltv) customData.predicted_ltv = params.predicted_ltv;
+	return customData;
+};
+
+/**
+ * Options for configuring a PixelControl instance.
+ */
 export type PixelControlOptions = {
 	/**
 	 * if provided, events fired will always have this code attached
@@ -229,7 +256,7 @@ export class PixelControl {
 		if (this._conversionClient) {
 			eventID = eventID ?? crypto.randomUUID();
 			this._conversionClient
-				.trackEvent(event, { eventID: eventID, customData: params as any })
+				.trackEvent(event, { eventID: eventID, customData: pixelParamsToCustomData(params ?? {}) })
 				.then((response) => {
 					log.debug(
 						`Meta Pixel [${this._pixelID}] ${event} event sent to Conversion API with Event ID: ${eventID}, Response: ${JSON.stringify(

src/lib/types/conversion.d.ts

@@ -16,6 +16,47 @@ export type ConversionUserData = {
 	externalId?: string;
 };
 
+/**
+ * Supported custom data fields for conversion events.
+ */
+export type ConversionEventParams = {
+	value?: number;
+	net_revenue?: number;
+	currency?: string;
+	content_name?: string;
+	content_category?: string;
+	content_ids?: string[];
+	contents?: {
+		id?: string;
+		quantity?: number;
+		item_price?: number;
+		title?: string;
+		description?: string;
+		category?: string;
+		brand?: string;
+		delivery_category?: string;
+	}[];
+	content_type?: string;
+	order_id?: string;
+	predicted_ltv?: number;
+	num_items?: number;
+	search_string?: string;
+	status?: string;
+	item_number?: string;
+	delivery_category?: string;
+	custom_properties?: Record<string, unknown>;
+};
+
+/**
+ * Parameters for sending a conversion event to Meta Pixel.
+ */
+export type ConversionEventDetails = {
+	eventID: string;
+	actionSource: 'website' | 'app' | 'offline' | 'other';
+	userData: ConversionUserData;
+	eventSourceURL?: string;
+};
+
 /**
  * Request body for conversion event tracking.
  */
@@ -28,7 +69,7 @@ export type ConversionRequestBody = {
 		Record<'utm_source' | 'utm_medium' | 'utm_campaign' | 'utm_content' | 'utm_term', string>
 	>;
 	user?: Omit<ConversionUserData, 'ip'>;
-	customData?: Record<string, string>;
+	customData?: ConversionEventParams;
 };
 
 /**

src/lib/types/fbq.d.ts

@@ -39,7 +39,7 @@ export type CommonParams = Partial<{
 	/**
 	 * Product IDs associated with the event, such as SKUs (e.g. ["ABC123", "XYZ456"]).
 	 */
-	content_ids: (string | number)[];
+	content_ids: string[];
 
 	/**
 	 * Name of the page/product.