Manage Multiple Locations with JSON file

[nicolocarpignoli]

• Define JSON structure
• Create the anchor to download the JSON example file
• Create the button to upload the user JSON file
• Load and show on map the locations

[nicolocarpignoli]

@faace To start, a first JSON template can be the following:

{
    "showDistance": true/false, // if true, show distance from origin (distanceMsg property) for every place
    "showName": true/false, // if true, show place name for every place
    "heightFromGround": 0,  // if true, change Y position for every place
    "places": [
        {
            "id": 0,
            "name": "Colosseum",
            "latitude": 0.0000,
            "longitude": 0.000
        },
        {
            "id": 1,
            "name": "Arco di Traiano",
            "latitude": 0.0000,
            "longitude": 0.000
        },
        {
            "id": 2,
            "name": "Stadio Olimpico",
            "latitude": 0.0000,
            "longitude": 0.000
        }
        // ....
    ]
}

The user will define those parameters uploading a JSON. Instead, content will be uploaded from the frontend and will be the same for every place. What will make every place different is the distance and name.

[nicolocarpignoli]

@faace I have added checklist for this issue on main post

[faace]

@nicolocarpignoli Created new branch #49. And I have finished step 2 and step3. But the last step needs the implementation of issue #48 because after uploading the JSON file, the multi-locations need to be shown in the list.