34 lines
1.2 KiB
JavaScript
34 lines
1.2 KiB
JavaScript
/**
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* Loads the config manifest and every JSON file it references.
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*
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* data/manifest.json: { "files": ["game.json", "menu.json", "ship.json"] }
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*
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* Adding a config file = drop the .json in /data + one line in the manifest.
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* Each file becomes a section keyed by its file name (without .json), so
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* `ship.json` is available as `config.get('ship.thrust')`.
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*/
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export class ConfigLoader {
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static async load(manifestPath = 'data/manifest.json') {
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const manifest = await this.fetchJson(manifestPath);
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const files = Array.isArray(manifest?.files) ? manifest.files : [];
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// Resolve config files relative to the manifest's own location,
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// so this works with relative or absolute manifest paths.
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const base = manifestPath.replace(/[^/]*$/, '');
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const data = {};
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for (const file of files) {
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const name = file.split('/').pop().replace(/\.json$/i, '');
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data[name] = await this.fetchJson(base + file);
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}
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return data;
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}
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static async fetchJson(path) {
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const res = await fetch(path);
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if (!res.ok) {
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throw new Error(`Could not load config "${path}" (${res.status} ${res.statusText})`);
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}
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return res.json();
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}
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}
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