todo: Port https://github.com/Allow2/Allow2node to a Java library (Note: there is a prototype full offline C library we should consider after the base port. Just keep a note here to do so).

Oh, and we should build this library to be easy to install via a package manager if applicable/appropriate. (Maven?)

refer to https://github.com/Allow2/Allow2.github.io/wiki for more details.

to get you started.

These are based on a device token of: jJ5GOIaJ028Ywt6K

Make your own device tokens here: https://developer.allow2.com

First, pair with Allow2 (this is using the username/password method):

curl -H "Content-Type: application/json" -X POST -d @- https://api.allow2.com/api/pairDevice << EOF
{
   "user": "*EMAIL*",
   "pass":"*PASSWORD*",
   "deviceToken": "jJ5GOIaJ028Ywt6K",
   "name":"Test Device 1"
}
EOF

this returns a payload with information that you pass back to the app to persist for future use against the service:

{
  "status":"success",
  "pairId":12345,                                     # PAIR_ID
  "token":"6742b233-de46-4c86-2ac9-7b9e5729f999",     # PAIR_TOKEN
  "name":"Test Device 1",
  "userId": 1234,                                     # USER_ID
  "children":[
    { "id":682, "name":"Bob" },                       # CHILD_ID
    { "id":691, "name":"Grace" },
    { "id":1795,"name":"Fred"}
  ]
}

Make a call like this every 20 seconds or so to check and log usage.

This example checks if the given child is currently allowed to be gaming (activity "3"). The list of activities and their ids is available on the developer portal: https://developer.allow2.com/ltr/activities

curl -H "Content-Type: application/json" -X POST -d @- https://service.allow2.com/serviceapi/check << EOF
{
    "userId": *USER_ID*,
    "pairId": *PAIR_ID*,
    "pairToken": "*PAIR_TOKEN*",
    "deviceToken": "jJ5GOIaJ028Ywt6K",
    "tz": "Australia/Brisbane",
    "childId": *CHILD_ID*,
    "activities": [{
      "id": 3,
      "log": true
    }]
}
EOF

this returns a payload with success/failure and permissions/blocks/limits/etc.

For allowed usage you can simply check for "allowed":

{
   "allowed": true,
   ...
}

If not allowed, interrogate the payload to work out why:

{
   "allowed": false,
   ...
}

You can make the same call as above but omit the childId parameter. This will not log any usage, but will return the current ability to use the device (always false with no childId) and the current list of children so you can show a child selector (and their child pins for validating access on your device).

{
   "allowed":false,
   "children":[{
      "id":12345,
      "name":"Billy",
      "pin":"1234"
   }]
}

If you want to check if the device is still connected (in response to a user request perhaps). You can optionally use this endpoint:

TBC