Parse version 2 of the ad catalog

[jsecretan]

Description

The ad server is providing a v2 of the ad catalog, with some optimization and improvements. This story is to parse the new format, and additional uses thereof will be covered in follow up stories.

• New URL is at: https://ads-serve.brave.com/v2/catalog.gz
• Going forward, we should store etag of file and check the etag before downloading a new one
• The new file is gzipped
• The fields "budget", "execution" and the campaign name are removed because they are not used by the client
• Campaign has a new "priority" field
• Creative Sets have a new field for "oses" if campaigns only make sense on certain platforms. Parse and save for now.
• Campaign has day parting field

A new example is as follows:

  "version": 1,
  "issuers": [
    {
      "name": "confirmation",
      "publicKey": "jjNJnSb5rIcDh2gdJc4A1lyn3O1uznMFMhCBGtBRhn0="
    },
    {
      "name": "0BAT",
      "publicKey": "0L7b3Fn3Ipr7h0ACM6V8iv0acK90OvcTZwCg9J9kslM="
    },
    {
      "name": "0.05BAT",
      "publicKey": "SFC7j+17aEUfOFlDUGCsYzYIpaALM8gWSe6yd8dsPW4="
    },
    {
      "name": "0.10BAT",
      "publicKey": "tPoMBHA5FvEbKHRXIxe9ZhnpZMPR7/b7ry4n0o3cHno="
    },
    {
      "name": "0.15BAT",
      "publicKey": "IPEIY0oFq5zvT6hJBKLG2TyscolX9H9hq8VgT0Nv01M="
    },
    {
      "name": "0.20BAT",
      "publicKey": "XGh9+XqhVWJo0jORqZPNLii8DpWwHVfKYR/jgjqxY2U="
    },
    {
      "name": "0.25BAT",
      "publicKey": "5ncjvmBTlIbZZOXInr7sLsN60J7qs1bVVVFNsFPrHHk="
    }
  ],
  "ping": 7200000,
  "campaigns": [
    {
      "creativeSets": [
        {
          "creatives": [
            {
              "creativeInstanceId": "e91e5e74-d941-4359-a048-797b5d871025",
              "type": {
                "code": "notification_all_v1",
                "name": "notification",
                "platform": "all",
                "version": 1
              },
              "payload": {
                "body": "quae suscipit iste sed quia vitae consequatur in qui corrupti minima vitae atque dolorum ipsam quia quia deserunt tempora illum",
                "title": "ullam ut voluptatem",
                "targetUrl": "https://bessie.net"
              }
            }
          ],
          "segments": [
            {
              "code": "QFHjRnvPUs",
              "name": "food & drink"
            }
          ],
          "oses": [
            {
              "code": "i1g4cO6Pl",
              "name": "windows"
            }
          ],
          "creativeSetId": "7174cc88-cdda-47c8-b2f4-b94812de2066",
          "perDay": 72,
          "totalMax": 392
        }
      ],
      "dayParts": [
        {
          "dow": "monday",
          "startMinute": "60",
          "endMinute": "120"
        }
      ],
      "geoTargets": [
        {
          "code": "US",
          "name": "United States"
        }
      ],
      "campaignId": "09cc93c9-98d2-4117-ad50-d52e3ef22b76",
      "startAt": "2019-03-31T22:59:27.863Z",
      "endAt": "2020-03-18T06:06:38.190Z",
      "dailyCap": 1,
      "advertiserId": "8ed5123c-ce51-4974-beed-3d8360e735c0",
      "priority": 10
    }
  ],
  "catalogId": "2beaebe0116685afb907f94a2226cb2d51ac2fa6"
}```

[moritzhaller]

• Going forward, we should store etag of file and check the etag before downloading a new one

@jsecretan Is this already implemented in ads_serve.cc#L81?

[bsclifton]

Assigned the Nightly/1.3 milestone as that was missing when brave/brave-core#3980 was merged 👍