aklive2d/packages/project-json/libs/content_processor.js

export default class Matcher {
    #start
    #end
    #reExp
    #config
    #assets

    constructor(start, end, config, assets) {
        this.#start = start
        this.#end = end
        this.#reExp = new RegExp(`${start}.+?${end}`, 'g')
        this.#config = config
        this.#assets = assets
    }

    get result() {
        const matches = this.content.match(this.#reExp)
        if (matches !== null) {
            matches.forEach((match) => {
                const name = match
                    .replace(this.#start, '')
                    .replace(this.#end, '')
                const result = new Function(
                    'Evalable',
                    'config',
                    'assets',
                    `return new Evalable(config, assets).${name}`
                )(Evalable, this.#config, this.#assets)
                this.content =
                    matches.length > 1
                        ? this.content.replace(match, result)
                        : result
            })
        }
        return this.content
    }
}

class Evalable {
    #config
    #assets

    constructor(config, assets) {
        this.#config = config
        this.#assets = assets
    }

    split(location, varName, separator) {
        return this.#step(location, varName).split(separator)
    }

    var(location, varName) {
        return this.#step(location, varName)
    }

    #step(location, varName) {
        let content = this.#config
        if (location === 'assets') content = this.#assets
        varName.split('->').forEach((item) => {
            try {
                content = content[item]
            } catch (e) {
                throw new Error(`Cannot step ${varName}.`, e)
            }
        })
        return content
    }
}