Create a new project using a single `.zip` file

[Raruto]

Checklist

• [X] I've searched through the current issues to make sure this feature hasn't been requested already.

Motivation

Starting from: https://github.com/g3w-suite/g3w-admin/pull/881, we can create a new project using a shell command (or an automated script).

Now, it would be nice to be able to load a new project without forcing the user to go through the file manager.

That means, without forcing the user to make two separate uploads:

Suggested solution

A - ADMIN USER

1. create a zip file like the following: G3WSUITE_3.6.zip *

* organization of data and projects

2. upload it onto the "New QGIS project" form

B - SERVER SIDE

1. extract it into a temporary folder

import zipfile
from django.core.management import call_command

with zipfile.ZipFile(zip_file, 'r') as zip_ref:
    zip_ref.extractall("/tmp/new_project")

2. load the project

call_command('load_project', file="/tmp/new_project/demo.qgs", data="/tmp/new_project/projects_data/")

3. warn the user in case of file collisions (eg. within the "project_data" folder)

Alternatives considered

No response