You're in charge of implementing a new analytics "sessions" view. You're given a set of data that consists of individual web page visits, along with a visitorId which is generated by a tracking cookie that uniquely identifies each visitor. From this data we need to generate a list of sessions for each visitor.
You can get the raw event data from the dataset API at sample_url
The data set looks like this:
{
"events": [
{
"url": "/pages/a-big-river",
"visitorId": "d1177368-2310-11e8-9e2a-9b860a0d9039",
"timestamp": 1512754583000
},
{
"url": "/pages/a-small-dog",
"visitorId": "d1177368-2310-11e8-9e2a-9b860a0d9039",
"timestamp": 1512754631000
},
{
"url": "/pages/a-big-talk",
"visitorId": "f877b96c-9969-4abc-bbe2-54b17d030f8b",
"timestamp": 1512709065294
},
{
"url": "/pages/a-sad-story",
"visitorId": "f877b96c-9969-4abc-bbe2-54b17d030f8b",
"timestamp": 1512711000000
},
{
"url": "/pages/a-big-river",
"visitorId": "d1177368-2310-11e8-9e2a-9b860a0d9039",
"timestamp": 1512754436000
},
{
"url": "/pages/a-sad-story",
"visitorId": "f877b96c-9969-4abc-bbe2-54b17d030f8b",
"timestamp": 1512709024000
}
]
}Given this input data, we want to create a set of sessions of the incoming data. A sessions is defined as a group of events from a single visitor with no more than 10 minutes between each consecutive event. A visitor can have multiple sessions.
So given the example input data above, we would expect output which looks like:
{
"sessionsByUser": {
"f877b96c-9969-4abc-bbe2-54b17d030f8b": [
{
"duration": 41294,
"pages": [
"/pages/a-sad-story",
"/pages/a-big-talk"
],
"startTime": 1512709024000
},
{
"duration": 0,
"pages": [
"/pages/a-sad-story"
],
"startTime": 1512711000000
}
],
"d1177368-2310-11e8-9e2a-9b860a0d9039": [
{
"duration": 195000,
"pages": [
"/pages/a-big-river",
"/pages/a-big-river",
"/pages/a-small-dog"
],
"startTime": 1512754436000
}
]
}
}Once the event data has been transformed into session, you will need to send the result via an http POST to https://sample_url
Code passed the sample test case with message:
{"message":"Results match! Congratulations!"}