~ d e s i g n ~

src/util.js

@@ -0,0 +1,25 @@
+import getUrls from 'get-urls'
+
+export async function fetchEntries(domain, hashtags) {
+    const response = await fetch(`https://${domain}/api/v1/timelines/tag/${hashtags[0]}`)
+    const statuses = await response.json()
+
+    const entries = statuses
+        .map(status => {
+            const [url] = Array.from(getUrls(status.content)).filter(isSupportedUrl)
+            const tags = intersection(status.tags.map(tag => tag.name), hashtags)
+
+            return { status, url, tags }
+        })
+        .filter(entry => entry.url != null)
+
+    return entries
+}
+
+function isSupportedUrl(url) {
+    return (new URL(url)).hostname === 'youtube.com'
+}
+
+function intersection(xs, ys) {
+    return xs.filter(x => ys.includes(x));
+}