Static vast tag for mobile rendering API for rewarded video

[YuriyVelichkoPI]

Motivation

Host a static VAST tag in order to use it instead of PUC in the scenario for integration of the Prebid Mobile Rendering API with GAM Rewarded Video ads.

Description of the tag

This tag signals the Prebid Mobile SDK that Prebid's Line Item for the Rewarded Video wins. The trigger is a tag

<AdTitle>PrebidAppEvent</AdTitle>

Based on it the SDK determines a winner and manages to render it.

Future Steps

Need to host this file in the public space in order to use its URL in the GAM Creative setup.

[bretg]

The goal is to host this on as https://cdn.jsdelivr.net/npm/prebid-universal-creative@latest/dist/prebid-mobile-rewarded-vast.xml

@jsnellbaker and @ChrisHuie - please coordinate for how to make that happen. I believe there's a Jenknins job associated with this repo like there is for PBJS. Thanks.

[jsnellbaker]

Hi,

if we include moving this file into the gulp build process, subsequent releases of PUC will ensure the latest version of the file would be hosted at the location @bretg outlined on the jsdevlier domain.

From my quick test, I believe some new function like the following would need to be added to the gulpfile.js and then call that function as part of the main build gulp task found later down in the file (it can be added to the comma separated list with all the buildXYZ commands).

function includeStaticVastXmlFile() {
  let target = gulp.src('static/prebid-mobile-rewarded-vast.xml');
  return target.pipe(gulp.dest('dist'));
}

gulp.task('build', gulp.parallel(buildProd, buildCookieSync, buildCookieSyncWithConsent, buildNative, buildNativeRender, buildUid, includeStaticVastXmlFile));

If you then run gulp build locally on the project, you should see a copy of the file moved into the dist that's created/populated with all the normal build files.

If this updated gulp build command works locally, it should work the same for the Jenkins job.

[jsnellbaker]

I have pushed a commit on the fork to handle the proposed gulpfile updates.

Need a 2nd review.