Introduce GPT-4 support and increase AnkiGPT Plus price. (#136)

README.md

@@ -9,7 +9,7 @@ https://github.com/nilsreichardt/ankigpt/assets/24459435/853dee68-d634-48e4-93fe
 ## Features
 
 - 📁 Upload PDF slides or insert text
-- 🧠 Generate flashcards up to 150 [Anki](https://apps.ankiweb.net/) flashcards with one click
+- 🧠 Generate flashcards up to 150 [Anki](https://apps.ankiweb.net/) flashcards with one click using GPT-3.5 or GPT-4 by OpenAI
 - 📤 Export generated flashcards by GPT (ChatGPT) to [Anki](https://apps.ankiweb.net/) with CSV file
 - ✏️ Edit flashcards, in case you want to change something
 - 🗑️ Delete flashcards, in case GPT (ChatGPT) generated something wrong or useless card
@@ -36,7 +36,7 @@ AnkiGPT is designed to be a globally accessible tool, and as such, it supports n
 
 ### Which model is used for AnkiGPT?
 
-AnkiGPT uses as underlaying AI model GPT-3.5 by OpenAI.
+AnkiGPT primarily utilizes the GPT-3.5 by OpenAI model to generate flashcards, offering a seamless integration of advanced AI technology for effective learning. For users who opt for the AnkiGPT Plus version, they gain the enhanced capability to generate up to 150 flashcards per month using the more advanced [GPT-4 model](https://openai.com/gpt-4), ensuring even more sophisticated and nuanced content creation.
 
 ### Is the content from my submitted lecture slides used for AI training?
 

lib/src/infrastructure/session_repository.dart

@@ -26,6 +26,7 @@ class SessionRepository {
   Future<SessionId> startSession({
     required Input input,
     required int numberOfCards,
+    required String model,
     required SessionId? sessionId,
   }) async {
     final result = await functions
@@ -36,6 +37,7 @@ class SessionRepository {
         'input': input.toJson(),
         'sessionId': sessionId,
         'numberOfCards': numberOfCards,
+        'model': model,
       }
     });
     return result.data['id'];

lib/src/models/app_user.dart

@@ -13,6 +13,7 @@ class AppUser with _$AppUser {
     @Default(Usage(
       generatedCardsCurrentMonth: 0,
       generatedMnemonicsCurrentMonth: 0,
+      generatedCardsCurrentMonthByModel: UsagePerMonthPerModel(),
     ))
     Usage usage,
   }) = _AppUser;
@@ -37,7 +38,19 @@ class Usage with _$Usage {
   const factory Usage({
     @Default(0) int generatedCardsCurrentMonth,
     @Default(0) int generatedMnemonicsCurrentMonth,
+    @Default(UsagePerMonthPerModel())
+    UsagePerMonthPerModel generatedCardsCurrentMonthByModel,
   }) = _Usage;
 
   factory Usage.fromJson(Map<String, dynamic> json) => _$UsageFromJson(json);
 }
+
+@freezed
+class UsagePerMonthPerModel with _$UsagePerMonthPerModel {
+  const factory UsagePerMonthPerModel({
+    @JsonKey(name: 'gpt-4') @Default(0) int gpt4,
+  }) = _UsagePerMonthPerModel;
+
+  factory UsagePerMonthPerModel.fromJson(Map<String, dynamic> json) =>
+      _$UsagePerMonthPerModelFromJson(json);
+}