feat: remove built in database and read from new downloaded one

Author: catreedle

Keyboards/Data/DELanguageData.sqlite

@@ -16,7 +16,7 @@ class LanguageDBManager {
     if translate {
       database = openDBQueue("TranslationData")
     } else {
-      database = openDBQueue("\(getControllerLanguageAbbr().uppercased())LanguageData")
+      database = openDownloadedDBQueue("\(getControllerLanguageAbbr().uppercased())LanguageData")
     }
   }
 
@@ -42,6 +42,20 @@ class LanguageDBManager {
     }
   }
 
+  private func openDownloadedDBQueue(_ dbName: String) -> DatabaseQueue? {
+    let fileManager = FileManager.default
+    guard let containerURL = fileManager.containerURL(forSecurityApplicationGroupIdentifier: "group.be.scri.userDefaultsContainer") else {
+        print("App group container not found")
+        return nil
+    }
+    let dbPath = containerURL.appendingPathComponent("\(dbName).sqlite").path
+    guard fileManager.fileExists(atPath: dbPath) else {
+        print("\(dbName).sqlite not found in app group container")
+        return nil
+    }
+    return try? DatabaseQueue(path: dbPath)
+}
+
   /// Loads a JSON file that contains grammatical information into a dictionary.
   ///
   /// - Parameters

Keyboards/Data/ENLanguageData.sqlite

@@ -457,7 +457,7 @@ class KeyboardViewController: UIInputViewController {
         // Get options for completion that start with the current prefix and are not just one letter.
         let completionOptions = LanguageDBManager.shared.queryAutocompletions(word: currentPrefix)
 
-        if !completionOptions[0].isEmpty {
+        if !completionOptions.isEmpty && !completionOptions[0].isEmpty {
           if completionOptions.count <= 3 {
             for i in 0 ..< completionOptions.count {
               if shiftButtonState == .shift {