Add version checker

client/plugins/version.js

@@ -0,0 +1,59 @@
+import packagejson from '../package.json'
+import axios from 'axios'
+
+function parseSemver(ver) {
+  if (!ver) return null
+  var groups = ver.match(/^v((([0-9]+)\.([0-9]+)\.([0-9]+)(?:-([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?)(?:\+([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?)$/)
+  if (groups && groups.length > 6) {
+    var total = Number(groups[3]) * 100 + Number(groups[4]) * 10 + Number(groups[5])
+    if (isNaN(total)) {
+      console.warn('Invalid version total', groups[3], groups[4], groups[5])
+      return null
+    }
+    return {
+      total,
+      version: groups[2],
+      major: Number(groups[3]),
+      minor: Number(groups[4]),
+      patch: Number(groups[5]),
+      preRelease: groups[6] || null
+    }
+  } else {
+    console.warn('Invalid semver string', ver)
+  }
+  return null
+}
+export async function checkForUpdate() {
+  if (!packagejson.version) {
+    return
+  }
+  var currVerObj = parseSemver('v' + packagejson.version)
+  if (!currVerObj) {
+    console.error('Invalid version', packagejson.version)
+    return
+  }
+  var largestVer = null
+  await axios.get(`https://api.github.com/repos/advplyr/audiobookshelf/tags`).then((res) => {
+    var tags = res.data
+    if (tags && tags.length) {
+      tags.forEach((tag) => {
+        var verObj = parseSemver(tag.name)
+        if (verObj) {
+          if (!largestVer || largestVer.total < verObj.total) {
+            largestVer = verObj
+          }
+        }
+      })
+    }
+  })
+  if (!largestVer) {
+    console.error('No valid version tags to compare with')
+    return
+  }
+  return {
+    hasUpdate: largestVer.total > currVerObj.total,
+    latestVersion: largestVer.version,
+    githubTagUrl: `https://github.com/advplyr/audiobookshelf/releases/tag/v${largestVer.version}`,
+    currentVersion: currVerObj.version
+  }
+}