From 9fa6e7dd2dba99efaa3705b90270d82fce4f18c9 Mon Sep 17 00:00:00 2001
From: Demetrios Skamiotis <49187886+dskamiotis@users.noreply.github.com>
Date: Wed, 20 Nov 2024 15:55:54 +0000
Subject: [PATCH] adds manual gpid to prebid ad unit and launch to 99% of users
 (#1651)

* adds manual gpid to prebid ad unit

* fix slotconfig spec type issue

* refactor to add higher definition ext object

* use window config to get page details

* use window config to get page details

* use slot key for slot name

* add 2% ab test for gpid

* add gpid to 99% of users

* add changeset for release

* refator gpid test name

* amend userVariant control logic

* Update src/experiments/tests/gpid-prebid.ts

Co-authored-by: Emma Imber <108270776+emma-imber@users.noreply.github.com>

* extends date for test

---------

Co-authored-by: Emma Imber <108270776+emma-imber@users.noreply.github.com>
---
 .changeset/tiny-rats-lay.md             |  5 +++++
 src/experiments/ab-tests.ts             |  2 ++
 src/experiments/tests/gpid-prebid.ts    | 29 ++++++++++++++++++++++++
 src/lib/header-bidding/prebid/prebid.ts | 30 +++++++++++++++++++++++++
 4 files changed, 66 insertions(+)
 create mode 100644 .changeset/tiny-rats-lay.md
 create mode 100644 src/experiments/tests/gpid-prebid.ts

diff --git a/.changeset/tiny-rats-lay.md b/.changeset/tiny-rats-lay.md
new file mode 100644
index 000000000..9aef7e1d8
--- /dev/null
+++ b/.changeset/tiny-rats-lay.md
@@ -0,0 +1,5 @@
+---
+'@guardian/commercial': patch
+---
+
+adds gpid for 99% of users to prebid request
diff --git a/src/experiments/ab-tests.ts b/src/experiments/ab-tests.ts
index f6b637ccc..b0676ae6b 100644
--- a/src/experiments/ab-tests.ts
+++ b/src/experiments/ab-tests.ts
@@ -1,4 +1,5 @@
 import type { ABTest } from '@guardian/ab-core';
+import { gpidPrebidAdUnits } from './tests/gpid-prebid';
 import { mpuWhenNoEpic } from './tests/mpu-when-no-epic';
 import { newHeaderBiddingEndpoint } from './tests/new-header-bidding-endpoint';
 import { optOutFrequencyCap } from './tests/opt-out-frequency-cap';
@@ -13,4 +14,5 @@ export const concurrentTests: ABTest[] = [
 	mpuWhenNoEpic,
 	optOutFrequencyCap,
 	newHeaderBiddingEndpoint,
+	gpidPrebidAdUnits,
 ];
diff --git a/src/experiments/tests/gpid-prebid.ts b/src/experiments/tests/gpid-prebid.ts
new file mode 100644
index 000000000..17e86cb4b
--- /dev/null
+++ b/src/experiments/tests/gpid-prebid.ts
@@ -0,0 +1,29 @@
+import type { ABTest } from '@guardian/ab-core';
+
+export const gpidPrebidAdUnits: ABTest = {
+	id: 'GpidPrebidAdUnits',
+	author: '@commercial-dev',
+	start: '2024-11-15',
+	expiry: '2024-12-22',
+	audience: 2 / 100,
+	audienceOffset: 0 / 100,
+	audienceCriteria: '',
+	successMeasure: 'Verify GPID is added to Prebid.js ad units',
+	description:
+		'Test to verify that GPID is correctly added to Prebid.js ad units.',
+	variants: [
+		{
+			id: 'control',
+			test: (): void => {
+				/* no-op */
+			},
+		},
+		{
+			id: 'variant',
+			test: (): void => {
+				/* no-op */
+			},
+		},
+	],
+	canRun: () => true,
+};
diff --git a/src/lib/header-bidding/prebid/prebid.ts b/src/lib/header-bidding/prebid/prebid.ts
index a83875a26..5e7165d7b 100644
--- a/src/lib/header-bidding/prebid/prebid.ts
+++ b/src/lib/header-bidding/prebid/prebid.ts
@@ -9,6 +9,7 @@ import { EventTimer } from '../../../core/event-timer';
 import type { PageTargeting } from '../../../core/targeting/build-page-targeting';
 import type { Advert } from '../../../define/Advert';
 import { isUserInVariant } from '../../../experiments/ab';
+import { gpidPrebidAdUnits } from '../../../experiments/tests/gpid-prebid';
 import { newHeaderBiddingEndpoint } from '../../../experiments/tests/new-header-bidding-endpoint';
 import { getPageTargeting } from '../../build-page-targeting';
 import { getAdvertById } from '../../dfp/get-advert-by-id';
@@ -163,10 +164,21 @@ type BidderSettings = {
 	magnite?: Partial<BidderSetting>;
 };
 
+const shouldIncludeGpid = !isUserInVariant(gpidPrebidAdUnits, 'control');
+
 class PrebidAdUnit {
 	code: string | null | undefined;
 	bids: PrebidBid[] | null | undefined;
 	mediaTypes: PrebidMediaTypes | null | undefined;
+	gpid?: string;
+	ortb2Imp?: {
+		ext: {
+			gpid: string;
+			data: {
+				pbadslot: string;
+			};
+		};
+	};
 
 	constructor(
 		advert: Advert,
@@ -176,6 +188,18 @@ class PrebidAdUnit {
 		this.code = advert.id;
 		this.bids = bids(advert.id, slot.sizes, pageTargeting);
 		this.mediaTypes = { banner: { sizes: slot.sizes } };
+		if (shouldIncludeGpid) {
+			this.gpid = this.generateGpid(advert, slot);
+			this.ortb2Imp = {
+				ext: {
+					gpid: this.gpid,
+					data: {
+						pbadslot: this.gpid,
+					},
+				},
+			};
+		}
+
 		advert.headerBiddingSizes = slot.sizes;
 		log('commercial', `PrebidAdUnit ${this.code}`, this.bids);
 	}
@@ -183,6 +207,12 @@ class PrebidAdUnit {
 	isEmpty() {
 		return this.code == null;
 	}
+	private generateGpid(advert: Advert, slot: HeaderBiddingSlot): string {
+		const sectionName = window.guardian.config.page.section;
+		const contentType = window.guardian.config.page.contentType;
+		const slotName = slot.key;
+		return `/59666047/gu/${sectionName}/${contentType}/${slotName}`;
+	}
 }
 
 declare global {