diff --git a/src/open/ClientViewModel.js b/src/open/ClientViewModel.js
index 3987315..84e2329 100644
--- a/src/open/ClientViewModel.js
+++ b/src/open/ClientViewModel.js
@@ -17,14 +17,7 @@ limitations under the License.
 import {isWebPlatform, isDesktopPlatform, Platform} from "../Platform.js";
 import {ViewModel} from "../utils/ViewModel.js";
 import {IdentifierKind} from "../Link.js";
-
-function getMatchingPlatforms(client, supportedPlatforms) {
-    const clientPlatforms = client.platforms;
-    const matchingPlatforms = supportedPlatforms.filter(p => {
-        return clientPlatforms.includes(p);
-    });
-    return matchingPlatforms;
-}
+import {getMatchingPlatforms, selectPlatforms} from "./clients/index.js";
 
 export class ClientViewModel extends ViewModel {
     constructor(options) {
@@ -40,10 +33,10 @@ export class ClientViewModel extends ViewModel {
 
     _update() {
         const matchingPlatforms = getMatchingPlatforms(this._client, this.platforms);
-        this._webPlatform = matchingPlatforms.find(p => isWebPlatform(p));
-        this._nativePlatform = matchingPlatforms.find(p => !isWebPlatform(p));
-        const preferredPlatform = matchingPlatforms.find(p => p === this.preferences.platform);
-        this._proposedPlatform = preferredPlatform || this._nativePlatform || this._webPlatform;
+        const {proposedPlatform, nativePlatform, webPlatform} = selectPlatforms(matchingPlatforms, this.preferences.platform);
+        this._nativePlatform = nativePlatform;
+        this._webPlatform = webPlatform;
+        this._proposedPlatform = proposedPlatform;
 
         this.openActions = this._createOpenActions();
         this.installActions = this._createInstallActions();
diff --git a/src/open/clients/index.js b/src/open/clients/index.js
index 44acee2..46a5fea 100644
--- a/src/open/clients/index.js
+++ b/src/open/clients/index.js
@@ -21,6 +21,25 @@ import {Fractal} from "./Fractal.js";
 import {Quaternion} from "./Quaternion.js";
 import {Tensor} from "./Tensor.js";
 import {Fluffychat} from "./Fluffychat.js";
+import {isWebPlatform} from "../../Platform.js"
+
+export function getMatchingPlatforms(client, supportedPlatforms) {
+    const clientPlatforms = client.platforms;
+    const matchingPlatforms = supportedPlatforms.filter(p => {
+        return clientPlatforms.includes(p);
+    });
+    return matchingPlatforms;
+}
+
+export function selectPlatforms(matchingPlatforms, userPreferredPlatform) {
+    const webPlatform = matchingPlatforms.find(p => isWebPlatform(p));
+    const nativePlatform = matchingPlatforms.find(p => !isWebPlatform(p));
+    const preferredPlatform = matchingPlatforms.find(p => p === userPreferredPlatform);
+    return {
+        proposedPlatform: preferredPlatform || nativePlatform || webPlatform,
+        nativePlatform, webPlatform
+    };
+}
 
 export function createClients() {
     return [