# GraphQL

{% hint style="danger" %}
This document refers to deprecated parts of the platform and has been left intact to help customers with legacy integrations. In order to access the latest platform features and documentation, please go to <https://docs.sentiance.com>.
{% endhint %}

Our API primarily speaks [GraphQL](https://graphql.org/learn/) (GQL, for short). While explaining how GraphQL works is beyond the scope of this guide, there are excellent resources available on the interwebs.

Here we will introduce the basic request-response structure of the Sentiance GraphQL API.

## Endpoint and Authorization

Our default GraphQL endpoint lives at **POST** `https://api.sentiance.com/v2/gql` and accepts the same [bearer token based authorization](https://legacy-docs.sentiance.com/important-topics/authentication-and-authorization) as our[ REST endpoints.](https://legacy-docs.sentiance.com/backend/rest-api)

We adhere to the [GraphQL specification](https://graphql.org/learn/serving-over-http/#post-request) but do not support multiple operation types.

Since it is possible for a single HTTP request to encompass multiple GraphQL queries with some of them succeeding and some of them failing, the endpoint always returns a 200 OK, unless something severe enough happens on the server-side to guarantee failure of the entire response (such as a 500 status code). After checking for the 200 status code, please also check the body of the response for `data` and `error` properties.

{% hint style="danger" %}
For other environments, please ask your sales representative or <support@sentiance.com> for the custom endpoint linked to your environment.
{% endhint %}

## GQL Request

<mark style="color:green;">`POST`</mark> `https://api.sentiance.com/v2/gql`

#### Headers

| Name          | Type   | Description      |
| ------------- | ------ | ---------------- |
| Authorization | string | Bearer           |
| Content-Type  | string | application/json |

#### Request Body

| Name      | Type   | Description                                                             |
| --------- | ------ | ----------------------------------------------------------------------- |
| query     | string | The GraphQL query.                                                      |
| variables | object | A flat JSON object describing the variables to substitute in the query. |

{% tabs %}
{% tab title="200 This would depend on the query made. An example of query/response is presented here." %}

```javascript
REQUEST 
{
  "query": "query($user_id: String!) {\n  user(id: $user_id) {\n    id\n    event_history(from: \"2019-04-01\", to:\"2019-04-02\") {\n      type\n      start\n      end\n      analysis_type\n      ... on Stationary {\n        latitude\n        longitude\n        location {\n          significance\n        }\n      }\n      ... on Transport {\n        mode\n        distance\n      }\n    }\n  }\n}",
  "variables": {
    "user_id": "5a93deb3d8e7d90600001e6f"
  }
}

RESPONSE
{
  "data": {
    "user": {
      "id": "5a93deb3d8e7d90600001e6f",
      "event_history": [
        {
          "type": "Stationary",
          "start": "2019-02-05T09:25:01.000+01:00",
          "end": null,
          "analysis_type": "indepth",
          "latitude": 51.19654,
          "longitude": 4.40794,
          "location": {
            "significance": "new"
          }
        }
      ]
    }
  }
}
```

{% endtab %}
{% endtabs %}

### Introspection

While you can always discover and play around with Graphql in our [Data Explorers](https://legacy-docs.sentiance.com/data-explorer/data-explorer), you might wish to programatically introspect our Schema for your own tools to parse. You can do so by firing off an Introspection Query.

```javascript
QUERY
query IntrospectionQuery {
  __schema {
    queryType {
      name
    }
    mutationType {
      name
    }
    subscriptionType {
      name
    }
    types {
      ...FullType
    }
    directives {
      name
      description
      locations
      args {
        ...InputValue
      }
    }
  }
}

fragment FullType on __Type {
  kind
  name
  description
  fields(includeDeprecated: true) {
    name
    description
    args {
      ...InputValue
    }
    type {
      ...TypeRef
    }
    isDeprecated
    deprecationReason
  }
  inputFields {
    ...InputValue
  }
  interfaces {
    ...TypeRef
  }
  enumValues(includeDeprecated: true) {
    name
    description
    isDeprecated
    deprecationReason
  }
  possibleTypes {
    ...TypeRef
  }
}

fragment InputValue on __InputValue {
  name
  description
  type {
    ...TypeRef
  }
  defaultValue
}

fragment TypeRef on __Type {
  kind
  name
  ofType {
    kind
    name
    ofType {
      kind
      name
      ofType {
        kind
        name
        ofType {
          kind
          name
          ofType {
            kind
            name
            ofType {
              kind
              name
              ofType {
                kind
                name
              }
            }
          }
        }
      }
    }
  }
}
```

## Examples

Some examples of various GQL queries with example response are presented here. With GraphQL you can fetch as much or as little as you wish.

### Moment Definitions

```javascript
QUERY
query {
  moment_definitions {
    id
    type
    category
    display_name
  } 
}

RESPONSE
{
  "data": {
    "moment_definitions": [
      {
        "id": "working_at_work",
        "type": "MomentDefinition",
        "category": "activity",
        "display_name": "Working at work"
      },
      {...}
    ]
  }
}
```

### Alpha Segments

```javascript
QUERY
query {
  segment_definitions(status: ALPHA) {
    id
    type
    category
    display_name
  } 
}

RESPONSE
{
  "data": {
    "segment_definitions": [
      {
        "id": "mobility.passenger",
        "type": "SegmentDefinition",
        "category": "passenger",
        "display_name": "Passenger"
      },
      {...}
    ]
  }
}
```

### User Timeline Query

```javascript
QUERY
query($user_id: String!, $from:String, $to: String) {
  user(id: $user_id) {
    event_history(from: $from, to:$to) {
      type
      start
      end
      analysis_type
      ... on Stationary {
        latitude
        longitude
        location {
          significance
        }
      }
      ... on Transport {
        mode
        distance
      }
    }
  }
}

VARIABLES
{ 
  "user_id": "583e08a1cd99250700000002",
  "from": "2019-03-22",
  "to": "2019-03-23"
}

RESPONSE
{
  "data": {
    "user": {
      "event_history": [
        {
          "type": "Stationary",
          "start": "2019-03-23T19:51:49.000+01:00",
          "end": "2019-03-25T08:30:21.000+01:00",
          "analysis_type": "indepth",
          "latitude": 51.78561,
          "longitude": 42.49694,
          "location": {
            "significance": "home"
          }
        },
        {
          "type": "Transport",
          "start": "2019-03-23T19:49:49.000+01:00",
          "end": "2019-03-23T19:51:49.000+01:00",
          "analysis_type": "indepth",
          "mode": "walking",
          "distance": null
        },
        {...}
      ]
    }
  }
}
```

### User Moment History

```javascript
QUERY
query($user_id: String!, $from:String, $to: String) {
  user(id: $user_id) {
    id
    moment_history(from: $from, to:$to) {
      start
      end
      analysis_type
      moment_definition_id
    }
  }
}

VARIABLES
{ 
  "user_id": "583e08a1cd99250700000002",
  "from": "2019-03-22",
  "to": "2019-03-23"
}

RESPONSE
{
  "data": {
    "user": {
      "id": "583e08a1cd99250700000002",
      "moment_history": [
        {
          "start": "2019-03-23T19:51:49.000+01:00",
          "end": "2019-03-25T08:30:21.000+01:00",
          "analysis_type": "processed",
          "moment_definition_id": "home"
        },
        {
          "start": "2019-03-23T19:22:40.000+01:00",
          "end": "2019-03-23T19:49:49.000+01:00",
          "analysis_type": "processed",
          "moment_definition_id": "shopping_routine"
        },
        {...}
      ]
    }
  }
}
```