Show/hide upgrade sidebar item

web/utils/apis.ts

@@ -34,6 +34,8 @@ export const LOGS_ALL = `${API_LOCATION}logs`;
 // Get warnings + errors
 export const LOGS_WARN = `${API_LOCATION}logs/warnings`;
 
+const GITHUB_RELEASE_URL = "https://api.github.com/repos/owncast/owncast/releases/latest";
+
 // Current Stream status.
 // This is literally the same as /api/status except it supports
 // auth.
@@ -61,3 +63,65 @@ export async function fetchData(url) {
   }
   return {};
 }
+
+export async function getGithubRelease() {
+  try {
+    const response = await fetch(GITHUB_RELEASE_URL);
+    if (!response.ok) {
+      const message = `An error has occured: ${response.status}`;
+      throw new Error(message);
+    }
+    const json = await response.json();
+    return json;
+  } catch (error) {
+    console.log(error);
+  }
+  return {};
+}
+
+// Make a request to the server status API and the Github releases API
+// and return a release if it's newer than the server version.
+export async function upgradeVersionAvailable() {
+  const serverVersion = await fetchData(STREAM_STATUS)
+  const recentRelease = await getGithubRelease();
+  let recentReleaseVersion = recentRelease.tag_name;
+
+  if (recentReleaseVersion.substr(0, 1) === 'v') {
+    recentReleaseVersion = recentReleaseVersion.substr(1)
+  }
+
+  if (!upToDate(serverVersion.versionNumber, recentReleaseVersion)) {
+    return recentReleaseVersion
+  }
+
+  return null;
+}
+
+// Stolen from https://gist.github.com/prenagha/98bbb03e27163bc2f5e4
+const VPAT = /^\d+(\.\d+){0,2}$/;
+function upToDate(local, remote) {
+    if (!local || !remote || local.length === 0 || remote.length === 0)
+        return false;
+    if (local === remote)
+        return true;
+    if (VPAT.test(local) && VPAT.test(remote)) {
+        const lparts = local.split('.');
+        while(lparts.length < 3)
+            lparts.push("0");
+        const rparts = remote.split('.');
+        while (rparts.length < 3)
+            rparts.push("0");
+        // eslint-disable-next-line no-plusplus
+        for (let i=0; i<3; i++) {
+            const l = parseInt(lparts[i], 10);
+            const r = parseInt(rparts[i], 10);
+            if (l === r)
+                // eslint-disable-next-line no-continue
+                continue;
+            return l > r;
+        }
+        return true;
+    } 
+        return local >= remote;
+    
+}