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78 lines
2.4 KiB
JavaScript
78 lines
2.4 KiB
JavaScript
import { json as d3_json } from 'd3-fetch';
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import { data as _data } from '../../data'; // prebundled data
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//
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// The coreData module fetches data from JSON files
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//
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export function coreData(context) {
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let _this = {};
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let _inflight = {};
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let _fileMap = {
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'address_formats': 'data/address_formats.min.json',
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'deprecated': 'data/deprecated.min.json',
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'discarded': 'data/discarded.min.json',
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'imagery': 'data/imagery.min.json',
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'intro_graph': 'data/intro_graph.min.json',
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'languages': 'data/languages.min.json',
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'locales': 'data/locales.min.json',
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'nsi_brands': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@3/dist/brands.json',
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'nsi_filters': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@3/dist/filters.json',
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'oci_features': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/features.min.json',
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'oci_resources': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/resources.min.json',
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'preset_categories': 'data/preset_categories.min.json',
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'preset_defaults': 'data/preset_defaults.min.json',
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'preset_fields': 'data/preset_fields.min.json',
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'preset_presets': 'data/preset_presets.min.json',
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'phone_formats': 'data/phone_formats.min.json',
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'shortcuts': 'data/shortcuts.min.json',
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'territory_languages': 'data/territory_languages.min.json',
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'wmf_sitematrix': 'https://cdn.jsdelivr.net/npm/wmf-sitematrix@0.1/wikipedia.min.json'
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};
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// Returns a Promise to fetch data
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// (resolved with the data if we have it already)
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_this.get = (which) => {
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if (_data[which]) {
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return Promise.resolve(_data[which]);
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}
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const file = _fileMap[which];
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const url = file && context.asset(file);
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if (!url) {
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return Promise.reject(`Unknown data file for "${which}"`);
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}
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let prom = _inflight[url];
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if (!prom) {
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_inflight[url] = prom = d3_json(url)
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.then(result => {
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delete _inflight[url];
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if (!result) {
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throw new Error(`No data loaded for "${which}"`);
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}
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_data[which] = result;
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return result;
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})
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.catch(err => {
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delete _inflight[url];
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throw err;
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});
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}
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return prom;
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};
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// Accessor for the file map
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_this.fileMap = function(val) {
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if (!arguments.length) return _fileMap;
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_fileMap = val;
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return _this;
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};
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return _this;
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}
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