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generate.js
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196 lines (167 loc) · 5.43 KB
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import { features as webFeatures } from "web-features";
import data from "./features.json" with { type: "json" };
import { BROWSERS, BROWSER_FLAVOR, WPT_BRANCH, INCLUDE_TENTATIVE } from "./const.js";
const idFromName = (name) => {
return name
.toLowerCase()
.replace(/\s/g, "-")
.replace(/[.:]/g, "-")
.replace(/[`<>()]/g, "");
};
function getID(feature) {
if (feature.id) {
return feature.id;
}
if (feature.webFeaturesID && !Array.isArray(feature.webFeaturesID)) {
return feature.webFeaturesID;
}
return idFromName(feature.name);
}
function getWPTTestResultURL(feature) {
if (!feature.wpt) {
return undefined;
}
const wptPath = feature.wpt;
const wptUrl = new URL(`https://wpt.fyi${wptPath}`);
wptUrl.searchParams.append("label", BROWSER_FLAVOR);
wptUrl.searchParams.append("label", WPT_BRANCH);
const qParams = [wptUrl.searchParams.get("q") || ""];
if (!INCLUDE_TENTATIVE) {
qParams.push("!is:tentative");
}
wptUrl.searchParams.set("q", qParams.join(" "));
return wptUrl.toString();
}
function getSpecURLs(feature) {
const { spec, webFeaturesID: id } = feature;
// If the feature already comes with its spec (or specs), just convert them into an array if needed.
if (spec) {
return Array.isArray(spec) ? spec : [spec];
}
// If the feature is a web feature, we can get the spec from web-features.
if (id) {
if (Array.isArray(id)) {
return id
.map((childId) => {
return Array.isArray(webFeatures[childId].spec)
? webFeatures[childId].spec
: [webFeatures[childId].spec];
})
.flat();
} else {
return Array.isArray(webFeatures[id].spec)
? webFeatures[id].spec
: [webFeatures[id].spec];
}
}
return [];
}
function formatRationale(feature) {
const { rationale } = feature;
return (rationale || []).map((r) => {
return {
description: r.description,
link: r.link,
};
});
}
function getDescription(feature) {
// If a description is provided, just use it.
if (feature.description) {
return feature.description;
}
const id = feature.webFeaturesID;
if (!id) {
return null;
}
// Otherwise, it's a web-feature, and we need to check if it's a group or a single feature.
if (Array.isArray(id)) {
return id
.map((childId) => webFeatures[childId].description_html)
.join("<br>");
}
return webFeatures[id].description_html;
}
function getName(feature) {
return feature.name || webFeatures[feature.webFeaturesID].name;
}
function getFeatureSupportForGroup(ids) {
const jointSupport = {};
for (const id of ids) {
const featureSupport = getFeatureSupportForSingleFeature(id);
for (const browser of BROWSERS) {
if (browser in jointSupport) {
if (jointSupport[browser] === false || featureSupport[browser] === false) {
// If either the overall feature is already not supported
// or the specific feature isn't, then the overall feature isn't supported.
jointSupport[browser] = false;
} else {
// Otherwise, that means both the overall feature is supported, and
// the specific feature is supported.
// Get the higher support value.
const overallSupport = parseFloat(jointSupport[browser]);
const featureSupportValue = parseFloat(featureSupport[browser]);
jointSupport[browser] = Math.max(overallSupport, featureSupportValue) + "";
}
} else {
jointSupport[browser] = featureSupport[browser];
}
}
}
return jointSupport;
}
function getFeatureSupportForSingleFeature(id) {
const support = {};
for (const browser of BROWSERS) {
support[browser] = webFeatures[id].status.support[browser] || false;
}
return support;
}
function getFeatureSupport(feature) {
const idOrIds = feature.webFeaturesID;
if (!idOrIds) {
const noSupport = {};
for (const browser of BROWSERS) {
noSupport[browser] = false;
}
return noSupport;
}
return Array.isArray(idOrIds)
? getFeatureSupportForGroup(idOrIds)
: getFeatureSupportForSingleFeature(idOrIds);
}
function main() {
// Go through the list of features.
return data.map((feature) => {
// Get the feature's metadata.
const id = getID(feature);
const wptURL = getWPTTestResultURL(feature);
const spec = getSpecURLs(feature);
const rationale = formatRationale(feature);
const description = getDescription(feature);
const name = getName(feature);
// Compute the feature's browser support data, using the web-features data.
const support = getFeatureSupport(feature);
return {
id,
name,
description,
spec,
rationale,
support,
graphNote: feature.graphNote,
wpt: feature.wpt,
wptURL,
test262: feature.test262,
// If forceUpdateResults is set to true, this causes fetch-test-results.js to
// get WPT results again, even if they are already in the JSON file.
// Useful for when the wpt URL has changed.
forceUpdateResults: feature.forceUpdateResults
};
}).sort((a, b) => {
// Sort features alphabetically by name.
return a.name.localeCompare(b.name);
});
}
const generated = main();
console.log(JSON.stringify(generated, null, 2));