Dailymotion Bid Adaptor: initial release (#5091)

* Dailymotion Bid Adaptor: initial release

* .md file lint issue resolved

* Dailymotion Bid Adaptor: add documentation for video metadata support

* feat(LEO-528): Allow multiple IAB categories in video metadata

The same way as we can have an array of IAB categories level 1 in the ORTB request, this PR introduces an array for the IAB categories level 2.

To be forward compatible with level [2.2](https://github.com/InteractiveAdvertisingBureau/Taxonomies/blob/main/Content%20Taxonomies/Content%20Taxonomy%202.2.tsv) and [3.0](https://github.com/InteractiveAdvertisingBureau/Taxonomies/blob/main/Content%20Taxonomies/Content%20Taxonomy%203.0.tsv) specifications, the category IDs should be sent as strings.

* Dailymotion bid adapter: Clarify the video metadata to provide in each player context

* Dailymotion bid adapter: Move API key to bid params

* Dailymotion Bid Adaptor: update docs for ortb2 & app & livestream support

* Dailymotion Bid Adaptor: add gpp support

---------

Co-authored-by: Kevin Siow <[email protected]>
Co-authored-by: Aditi Chaudhary <[email protected]>
Co-authored-by: Sébastien Millet <[email protected]>

dev-docs/bidders/dailymotion.md

@@ -0,0 +1,176 @@
+---
+layout: bidder
+title: Dailymotion
+description: Dailymotion Prebid Bidder Adapter
+pbjs: true
+pbs: false
+biddercode: dailymotion
+media_types: video
+gvl_id: 573
+tcfeu_supported: true
+usp_supported: true
+coppa_supported: true
+gpp_supported: true
+deals_supported: true
+floors_supported: true
+sidebarType: 1
+safeframes_ok: true
+ortb_blocking_supported: false
+---
+
+### Registration
+
+To use the adapter with any non-test request, you first need to ask an API key from Dailymotion. Please contact us through <[email protected]> .
+
+This API key will ensure proper identification of your inventory and allow you to get real bids.
+
+# Configuration options
+
+Before calling this adapter, you need to at least set a video adUnit in an instream context and the API key in the bid parameters:
+
+```javascript
+const adUnits = [
+  {
+    bids: [{
+      bidder: 'dailymotion',
+      params: {
+        apiKey: 'fake_api_key'
+      },
+    }],
+    code: 'test-ad-unit',
+    mediaTypes: {
+      video: {
+        context: 'instream',
+      },
+    },
+  }
+];
+```
+
+`apiKey` is your publisher API key. For testing purpose, you can use "dailymotion-testing".
+
+# Test Parameters
+
+By setting the following bid parameters, you'll get a constant response to any request, to validate your adapter integration:
+
+```javascript
+const adUnits = [
+  {
+    bids: [{
+      bidder: 'dailymotion',
+      params: {
+        apiKey: 'dailymotion-testing'
+      },
+    }],
+    code: 'test-ad-unit',
+    mediaTypes: {
+      video: {
+        context: 'instream',
+      },
+    },
+  }
+];
+```
+
+Please note that failing to set these will result in the adapter not bidding at all.
+
+# Sample video AdUnit
+
+To allow better targeting, you should provide as much context about the video as possible.
+There are three ways of doing this depending on if you're using Dailymotion player or a third party one.
+
+If you are using the Dailymotion player, you should only provide the video `xid` in your ad unit, example:
+
+```javascript
+const adUnits = [
+  {
+    bids: [{
+      bidder: 'dailymotion',
+      params: {
+        apiKey: 'dailymotion-testing'
+      }
+    }],
+    code: 'test-ad-unit',
+    mediaTypes: {
+      video: {
+        api: [2, 7],
+        context: 'instream',
+        startdelay: 0,
+        w: 1280,
+        h: 720,
+        xid: 'x123456'     // Dailymotion infrastructure unique video ID
+      },
+    }
+  }
+];
+```
+
+This will automatically fetch the most up-to-date information about the video.
+If you provide any other metadata in addition to the `xid`, they will be ignored.
+
+If you are using a third party video player, you should not provide any `xid` and instead fill the following members:
+
+```javascript
+const adUnits = [
+  {
+    bids: [{
+      bidder: 'dailymotion',
+      params: {
+        apiKey: 'dailymotion-testing',
+        video: {
+          description: 'overriden video description'
+        }
+      }
+    }],
+    code: 'test-ad-unit',
+    mediaTypes: {
+      video: {
+        api: [2, 7],
+        context: 'instream',
+        description: 'this is a video description',
+        duration: 556,
+        iabcat1: ['IAB-2'],
+        iabcat2: ['6', '17'],
+        id: '54321',
+        lang: 'FR',
+        livestream: 0,
+        private: false,
+        startdelay: 0,
+        tags: 'tag_1,tag_2,tag_3',
+        title: 'test video',
+        topics: 'topic_1, topic_2',
+        w: 1280,
+        h: 720,
+      },
+    }
+  }
+];
+```
+
+Each of the following video metadata fields can be added in mediaTypes.video or bids.params.video.
+If a field exists in both places, it will be overridden by bids.params.video.
+
+* `description` - Video description
+* `duration` - Video duration in seconds
+* `iabcat1` - List of IAB category IDs from the [1.0 taxonomy](https://github.com/InteractiveAdvertisingBureau/Taxonomies/blob/main/Content%20Taxonomies/Content%20Taxonomy%201.0.tsv)
+* `iabcat2` - List of IAB category IDs from the [2.0 taxonomy](https://github.com/InteractiveAdvertisingBureau/Taxonomies/blob/main/Content%20Taxonomies/Content%20Taxonomy%202.0.tsv) and above
+* `id` - Video unique ID in host video infrastructure
+* `lang` - ISO 639-1 code for main language used in the video
+* `livestream` - 0 = not live, 1 = content is live
+* `private` - True if video is not publicly available
+* `tags` - Tags for the video, comma separated
+* `title` - Video title
+* `topics` - Main topics for the video, comma separated
+* `xid` - Dailymotion video identifier (only applicable if using the Dailymotion player)
+
+If you already specify [First-Party data](https://docs.prebid.org/features/firstPartyData.html) through the `ortb2` object when calling [`pbjs.requestBids(requestObj)`](https://docs.prebid.org/dev-docs/publisher-api-reference/requestBids.html), we will fallback to those values when possible. See the mapping below.
+
+| From ortb2                                                          | Metadata fields |
+|---------------------------------------------------------------------|-----------------|
+| `ortb2.site.content.data` where `ext.segtax` is `4`                 | `iabcat1`       |
+| `ortb2.site.content.data`  where  `ext.segtax`  is  `5`, `6` or `7` | `iabcat2`       |
+| `ortb2.site.content.id`                                             | `id`            |
+| `ortb2.site.content.language`                                       | `lang`          |
+| `ortb2.site.content.livestream`                                     | `livestream`    |
+| `ortb2.site.content.keywords`                                       | `tags`          |
+| `ortb2.site.content.title`                                          | `title`         |