fix: Fixes issue where lock screen would not use previously active theme (#2372)

packages/ui-services/src/Theme/ActiveThemeList.ts

@@ -0,0 +1,70 @@
+import { UIFeature, ThemeInterface } from '@standardnotes/models'
+import { ItemManagerInterface } from '@standardnotes/services'
+import { NativeFeatureIdentifier, FindNativeTheme, ThemeFeatureDescription } from '@standardnotes/features'
+import { Uuid } from '@standardnotes/domain-core'
+
+export class ActiveThemeList {
+  private list: (NativeFeatureIdentifier | Uuid)[] = []
+
+  constructor(private items: ItemManagerInterface, initialList?: (NativeFeatureIdentifier | Uuid)[]) {
+    if (initialList) {
+      this.list = initialList
+    }
+  }
+
+  public getList(): (NativeFeatureIdentifier | Uuid)[] {
+    return this.list.slice()
+  }
+
+  public isEmpty(): boolean {
+    return this.list.length === 0
+  }
+
+  public clear(): void {
+    this.list = []
+  }
+
+  public has(candidate: NativeFeatureIdentifier | Uuid): boolean {
+    for (const entry of this.list) {
+      if (entry.equals(candidate)) {
+        return true
+      }
+    }
+
+    return false
+  }
+
+  public add(candidate: NativeFeatureIdentifier | Uuid): void {
+    if (!this.has(candidate)) {
+      this.list.push(candidate)
+    }
+  }
+
+  public remove(candidate: NativeFeatureIdentifier | Uuid): void {
+    this.list = this.list.filter((entry) => {
+      return !entry.equals(candidate)
+    })
+  }
+
+  public asThemes(): UIFeature<ThemeFeatureDescription>[] {
+    const results: UIFeature<ThemeFeatureDescription>[] = []
+
+    for (const entry of this.list) {
+      if (entry instanceof Uuid) {
+        const theme = this.items.findItem<ThemeInterface>(entry.value)
+        if (theme) {
+          const uiFeature = new UIFeature<ThemeFeatureDescription>(theme)
+          results.push(uiFeature)
+        }
+      } else {
+        const theme = FindNativeTheme(entry.value)
+        if (theme) {
+          const uiFeature = new UIFeature<ThemeFeatureDescription>(theme)
+          results.push(uiFeature)
+        }
+      }
+    }
+
+    return results
+  }
+}