[sqflite] Implement databaseExists method (#519)

Author: JSUYA

packages/sqflite/CHANGELOG.md

@@ -1,6 +1,7 @@
-## NEXT
+## 0.1.1
 
 * Resolve linter warnings.
+* Implement databaseExists method.
 
 ## 0.1.0
 

packages/sqflite/README.md

@@ -9,7 +9,7 @@ The Tizen implementation of [`sqflite`](https://github.com/tekartik/sqflite).
  ```yaml
 dependencies:
   sqflite: ^2.0.1
-  sqflite_tizen: ^0.1.0
+  sqflite_tizen: ^0.1.1
 ```
 
 Then you can import `sqflite` in your Dart code:

packages/sqflite/pubspec.yaml

@@ -2,7 +2,7 @@ name: sqflite_tizen
 description: SQLite plugin for Flutter. This plugin provides the Tizen implementation for SQLite.
 homepage: https://github.com/flutter-tizen/plugins
 repository: https://github.com/flutter-tizen/plugins/tree/master/packages/sqflite
-version: 0.1.0
+version: 0.1.1
 
 flutter:
   plugin:

packages/sqflite/tizen/src/constants.h

@@ -17,6 +17,7 @@ const std::string kMethodQuery = "query";
 const std::string kMethodUpdate = "update";
 const std::string kMethodBatch = "batch";
 const std::string kMethodDeleteDatabase = "deleteDatabase";
+const std::string kMethodDatabaseExists = "databaseExists";
 const std::string kParamId = "id";
 const std::string kParamPath = "path";
 

packages/sqflite/tizen/src/sqflite_plugin.cc

@@ -88,6 +88,8 @@ class SqflitePlugin : public flutter::Plugin {
       OnCloseDatabaseCall(method_call, std::move(result));
     } else if (method_name == sqflite_constants::kMethodDeleteDatabase) {
       OnDeleteDatabase(method_call, std::move(result));
+    } else if (method_name == sqflite_constants::kMethodDatabaseExists) {
+      OnDatabaseExistsCall(method_call, std::move(result));
     } else if (method_name == sqflite_constants::kMethodGetDatabasesPath) {
       OnGetDatabasesPathCall(method_call, std::move(result));
     } else if (method_name == sqflite_constants::kMethodOptions) {
@@ -513,6 +515,19 @@ class SqflitePlugin : public flutter::Plugin {
     result->Success();
   }
 
+  void OnDatabaseExistsCall(
+      const flutter::MethodCall<flutter::EncodableValue> &method_call,
+      std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result) {
+    flutter::EncodableMap arguments =
+        std::get<flutter::EncodableMap>(*method_call.arguments());
+    std::string path;
+    GetValueFromEncodableMap(arguments, sqflite_constants::kParamPath, path);
+
+    std::filesystem::path filesystem_path(path);
+    bool exists = std::filesystem::exists(filesystem_path);
+    result->Success(flutter::EncodableValue(exists));
+  };
+
   flutter::EncodableValue MakeOpenResult(int database_id, bool recovered,
                                          bool recovered_in_transaction) {
     flutter::EncodableMap response;