refactor(desktop): organize lib modules by domain

apps/desktop/src/lib/database/defaultDatabase.ts

@@ -0,0 +1,34 @@
+import type { ConnectionConfig, DatabaseType } from "@/types/database";
+import { usesTreeSchemaMode } from "@/lib/database/databaseCapabilities";
+
+export const TREE_SCHEMA_DEFAULT_DATABASE_SELECT_VALUE = "__dbx_tree_schema_default_database__";
+export const EMPTY_DATABASE_SELECT_VALUE = "__dbx_empty_database__";
+
+export function resolveDefaultDatabase(connection: Pick<ConnectionConfig, "database">, options: string[]): string {
+  return connection.database || options[0] || "";
+}
+
+export function isTreeSchemaDefaultDatabase(dbType: DatabaseType | undefined, database: string): boolean {
+  return database === "" && usesTreeSchemaMode(dbType);
+}
+
+export function encodeSelectableDatabaseValue(dbType: DatabaseType | undefined, database: string): string {
+  if (isTreeSchemaDefaultDatabase(dbType, database)) return TREE_SCHEMA_DEFAULT_DATABASE_SELECT_VALUE;
+  return database === "" ? EMPTY_DATABASE_SELECT_VALUE : database;
+}
+
+export function decodeSelectableDatabaseValue(dbType: DatabaseType | undefined, value: string): string {
+  if (value === TREE_SCHEMA_DEFAULT_DATABASE_SELECT_VALUE && usesTreeSchemaMode(dbType)) return "";
+  if (value === EMPTY_DATABASE_SELECT_VALUE) return "";
+  return value;
+}
+
+export function formatDatabaseLabel(connection: Pick<ConnectionConfig, "db_type"> | undefined, database: string, labels: { defaultDatabase: string; noDatabase: string }): string {
+  if (connection?.db_type === "redis" && database !== "") return `db${database}`;
+  if (isTreeSchemaDefaultDatabase(connection?.db_type, database)) return labels.defaultDatabase;
+  return database || labels.noDatabase;
+}
+
+export function isDefaultDatabase(connection: Pick<ConnectionConfig, "database"> | undefined, database: string): boolean {
+  return !!connection?.database && !!database && connection.database === database;
+}