Import Json Data Easier

[Counter Arts]

Have a ton of data you want to import? Do you hate defining a billion gets/sets for each custom data class definition? Hate writing python just to build the definitions?

This code is for you!

But how do you use it? Simple!

This is the code to load the json file.

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init 100 python:

    import json

    baseData = json.load(renpy.file("plotSetA.json"))

    for i in baseData["locations"]:

        Location.loadFromJsonObject(i)

This is the json file

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{"locations" : [
		{
			"id" : 1,
			"name" : "Cafe",
			"techName" : "cafe",
			"imageName" : "cafe",
			"xpos" : 20,
			"ypos" : 20,
			"filePrefix" : "bgs/",
			"variantFlags" : []

		},
		{
			"id" : 2,
			"name" : "Hospital",
			"techName" : "hospital",
			"imageName" : "hospital",
			"xpos" : 80,
			"ypos" : 20,
			"filePrefix" : "bgs/",
			"variantFlags" : ["moon"]

		},
		{
			"id" : 3,
			"name" : "Park",
			"techName" : "pafe",
			"imageName" : "pafe",
			"xpos" : 20,
			"ypos" : 20,
			"filePrefix" : "bgs/",
			"variantFlags" : []

		},
		{
			"id" : 4,
			"name" : "Shrine",
			"techName" : "shrine",
			"imageName" : "shrine",
			"xpos" : 50,
			"ypos" : 50,
			"filePrefix" : "bgs/",
			"variantFlags" : []

		},

		{
			"id" : 5,
			"name" : "Waterside Shops",
			"techName" : "waterside",
			"imageName" : "waterside",
			"xpos" : 80,
			"ypos" : 80,
			"filePrefix" : "bgs/",
			"variantFlags" : []

		}
	]
}

This is how location definition class looks like. Notice how every location being created is being indexed by id in "LocationDefs"!

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init 1 python:

    LocationDefs = {}

    @Loadable
    class Location:


        def __init__(self, id):

            self.id = id
            self.name = ""
            self.techName = ""
            self.imageName = ""
            self.xpos = 0
            self.ypos = 0
            self.variantFlags = []
            self.filePrefix = ""

            LocationDefs[id] = self
            

And here is the code to import into your Ren'Py project!

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init -2 python:

    import inspect
    import json

    # Class decorator
    # requires an init function that only takes an ID
    def Loadable(cls):

        temp = cls(-1)
        fieldsToGrab = filter(lambda i: not i.startswith("_") and not i.isupper() , dir(temp))


        @staticmethod
        def innerJsonLoadable(jsonData):

            current = cls(jsonData["id"])

            for i in fieldsToGrab:
                if i in jsonData:

                    setattr(current, i, jsonData[i] )

            return current


        cls.loadFromJsonObject = innerJsonLoadable

        return cls