Streamline code to clean logs based on version number

js/background.js

@@ -252,7 +252,10 @@
     await storage.put('version', currentVersion);
 
     if (newVersion) {
-      if (currentVersion === '1.14.2' || currentVersion === '1.15.0-beta.2') {
+      if (
+        lastVersion &&
+        window.isBeforeVersion(lastVersion, 'v1.15.0-beta.4')
+      ) {
         await window.Signal.Logs.deleteAll();
         window.restart();
       }

preload.js

@@ -4,6 +4,7 @@
 console.log('preload');
 
 const electron = require('electron');
+const semver = require('semver');
 
 const { deferredToPromise } = require('./js/modules/deferred_to_promise');
 
@@ -29,6 +30,18 @@ window.getExpiration = () => config.buildExpiration;
 window.getNodeVersion = () => config.node_version;
 window.getHostName = () => config.hostname;
 
+window.isBeforeVersion = (toCheck, baseVersion) => {
+  try {
+    return semver.lt(toCheck, baseVersion);
+  } catch (error) {
+    console.log(
+      `isBeforeVersion error: toCheck: ${toCheck}, baseVersion: ${baseVersion}`,
+      error && error.stack ? error.stack : error
+    );
+    return true;
+  }
+};
+
 window.wrapDeferred = deferredToPromise;
 
 const ipc = electron.ipcRenderer;