Add example placeholder

.vscode/launch.json

@@ -2,10 +2,10 @@
   "version": "0.2.0",
   "configurations": [
     {
-      "name": "Console (example)",
+      "name": "Example",
       "request": "launch",
       "type": "dart",
-      "program": "examples/console/bin/main.dart",
+      "program": "example",
       "env": {
         "ENVIRONMENT": "local"
       },

.vscode/tasks.json

@@ -11,6 +11,75 @@
       },
       "problemMatcher": []
     },
+    {
+      "label": "Get protoc plugin",
+      "type": "shell",
+      "command": ["dart pub global activate protoc_plugin"],
+      "dependsOn": ["Dependencies"],
+      "group": {
+        "kind": "none",
+        "isDefault": true
+      },
+      "problemMatcher": []
+    },
+    {
+      "label": "Generate protobuf",
+      "type": "shell",
+      "command": [
+        "protoc",
+        "--proto_path=lib/src/transport/protobuf",
+        "--dart_out=lib/src/transport/protobuf lib/src/transport/protobuf/client.proto"
+      ],
+      "dependsOn": ["Get protoc plugin"],
+      "group": {
+        "kind": "none",
+        "isDefault": true
+      },
+      "problemMatcher": []
+    },
+    {
+      "label": "Codegenerate",
+      "type": "shell",
+      "command": ["dart run build_runner build --delete-conflicting-outputs"],
+      "dependsOn": ["Dependencies"],
+      "group": {
+        "kind": "none",
+        "isDefault": true
+      },
+      "problemMatcher": []
+    },
+    {
+      "label": "Format",
+      "type": "shell",
+      "command": [
+        "dart format --fix -l 80 lib/src/model/pubspec.yaml.g.dart lib/src/transport/protobuf/"
+      ],
+      "group": {
+        "kind": "none",
+        "isDefault": true
+      },
+      "problemMatcher": []
+    },
+    {
+      "label": "Prepare example",
+      "type": "shell",
+      "options": {
+        "cwd": "${workspaceFolder}/example"
+      },
+      "command": [
+        "dart pub global activate intl_utils",
+        "dart pub global run intl_utils:generate",
+        "fvm flutter pub get",
+        /* "&& fvm flutter gen-l10n --arb-dir lib/src/common/localization --output-dir lib/src/common/localization/generated --template-arb-file intl_en.arb", */
+        "&& fvm flutter pub run build_runner build --delete-conflicting-outputs",
+        "&& dart format --fix -l 80 ."
+      ],
+      "group": {
+        "kind": "none",
+        "isDefault": true
+      },
+      "problemMatcher": []
+    },
     {
       "label": "Start Centrifugo Server",
       "type": "shell",

Makefile

@@ -11,7 +11,7 @@ get:
 test: get
 	@dart test --debug --coverage=.coverage --platform chrome,vm
 
-publish:
+publish: generate
 	@yes | dart pub publish
 
 deploy: publish

example/lib/src/common/constant/config.dart

@@ -0,0 +1,70 @@
+/// Config for app.
+abstract final class Config {
+  /// Environment flavor.
+  /// e.g. development, staging, production
+  static final EnvironmentFlavor environment = EnvironmentFlavor.from(
+      const String.fromEnvironment('ENVIRONMENT', defaultValue: 'development'));
+
+  // --- Centrifuge --- //
+
+  /// Centrifuge url.
+  /// e.g. https://domain.tld
+  static const String centrifugeBaseUrl = String.fromEnvironment(
+      'CENTRIFUGE_BASE_URL',
+      defaultValue: 'http://127.0.0.1:8000');
+
+  /// Centrifuge timeout in milliseconds.
+  /// e.g. 15000 ms
+  static const Duration centrifugeTimeout = Duration(
+      milliseconds:
+          int.fromEnvironment('CENTRIFUGE_TIMEOUT', defaultValue: 15000));
+
+  /// Secret for HMAC token.
+  static const String passwordMinLength =
+      String.fromEnvironment('CENTRIFUGE_TOKEN_HMAC_SECRET');
+
+  // --- Layout --- //
+
+  /// Maximum screen layout width for screen with list view.
+  static const int maxScreenLayoutWidth =
+      int.fromEnvironment('MAX_LAYOUT_WIDTH', defaultValue: 768);
+}
+
+/// Environment flavor.
+/// e.g. development, staging, production
+enum EnvironmentFlavor {
+  /// Development
+  development('development'),
+
+  /// Staging
+  staging('staging'),
+
+  /// Production
+  production('production');
+
+  /// {@nodoc}
+  const EnvironmentFlavor(this.value);
+
+  /// {@nodoc}
+  factory EnvironmentFlavor.from(String? value) =>
+      switch (value?.trim().toLowerCase()) {
+        'development' || 'debug' || 'develop' || 'dev' => development,
+        'staging' || 'profile' || 'stage' || 'stg' => staging,
+        'production' || 'release' || 'prod' || 'prd' => production,
+        _ => const bool.fromEnvironment('dart.vm.product')
+            ? production
+            : development,
+      };
+
+  /// development, staging, production
+  final String value;
+
+  /// Whether the environment is development.
+  bool get isDevelopment => this == development;
+
+  /// Whether the environment is staging.
+  bool get isStaging => this == staging;
+
+  /// Whether the environment is production.
+  bool get isProduction => this == production;
+}