Load levels from text

[valeatory]

Store level parameters in an easily editable text file that the game can read and generate multiple levels from, to keep hardcoded numbers separate from the abstract game functionality.

[Nolski]

We should also write up some documentation on the format of these files.

[Nolski]

I was thinking something like this (in json)

{
    current_game: true,
    current_level: 0,
    levels: [
        {   
            options: [
                "1/4",
                "-1/2",
                "-1/3",
                "2/3",
                "5/6"
            ],  
            answer: "8/9"
        }   
    ]   
}

Any additions to the information we should be storing?

[Nolski]

@chrisknepper @valeatory @ExplosiveHippo @Waterseas

[Nolski]

• [ ] add in question type for each level
• [ ] player data such as score, levels completed, etc.

[valeatory]

Documentation on the format of the files is already a separate issue: https://github.com/chrisknepper/xo-fractions-game/issues/29 If player data such as score, levels completed, etc is to be stored at the moment, it should be in a separate text file, because one should be edited by people, and the other is edited by the game. Since storing play-time variables is a separate issue from loading levels, and is used in a fundamentally different way, I would go so far as to suggest that it be added as another issue in the issue tracker instead of adding it here.

[valeatory]

For now, that level format looks good as it will give us the ability to create a lot of testable levels quickly. Randomization can come later.