TODO: Use GraphQL query to fetch username

[bgo-eiu]

User eserte on the Mapillary forums provided a helpful reference point on how to go about retrieving username info for an image in the absence of an API solution: https://forum.mapillary.com/t/bugreport-image-author-info-unavailable-in-the-new-api/4994/8

The call is a POST request against https://graph.mapillary.com/graphql
The post content is
$post_content = 'doc=query%20FetchImages(%24imageIds%3A%20%5BID!%5D)%20%7B%0A%20multifetch__MapImage(ids%3A%20%24imageIds)%20%7B%0A%20node%20%7B%0A%20altitude%0A%20atomic_scale%0A%20camera_parameters%0A%20camera_type%0A%20captured_at%0A%20compass_angle%0A%20computed_altitude%0A%20computed_compass_angle%0A%20computed_rotation%0A%20creator%20%7B%0A%20id%0A%20username%0A%20%7D%0A%20exif_orientation%0A%20height%0A%20id%0A%20merge_cc%0A%20mesh%20%7B%0A%20id%0A%20url%0A%20%7D%0A%20owner%20%7B%0A%20id%0A%20%7D%0A%20quality_score%0A%20sfm_cluster%20%7B%0A%20id%0A%20url%0A%20%7D%0A%20thumb(size%3ASIZE_2048)%20%7B%0A%20id%0A%20url%0A%20%7D%0A%20width%0A%20%7D%0A%20node_id%0A%20%7D%0A%7D&variables=%7B%0A%20%22imageIds%22%3A%20%5B%0A%20' . $start_id . '%0A%20%5D%0A%7D'
where $start_id is the image id. Also don’t forget to send an Authorization HTTP header; a possibility is to look into Web Inspector while using the Mapillary Web UI and use the same header as there.
Response is a somewhat complex JSON, the path to the username is something like
$data->{data}->{"multifetch__MapImage"}->[0]->{node}->{creator}->{username}