Integration of cache into contact, conversation and user api providers

lib/src/resources/contact_api_provider.dart

@@ -3,15 +3,26 @@ import "package:http/http.dart" as http;
 import "dart:convert";
 
 import "../models/user_model.dart";
+import "../services/cache_http.dart";
 import "../../settings.dart";
 
 class ContactApiProvider {
-  Future<List<User>> fetchContacts() async {
-    final response = await http.get("$baseUrlCore/user/$globalUserId/contact");
+  CacheHttp cache;
 
-    return jsonDecode(response.body)
-        .map<User>((user) => User.fromJson(user))
-        .toList();
+  Future<void> init() async {
+    this.cache = new CacheHttp();
+    await this.cache.init();
+  }
+
+  Future<List<User>> fetchContacts() async {
+    try {
+      final responseBody = await this.cache.fetch("$baseUrlCore/user/$globalUserId/contact");
+      return jsonDecode(responseBody)
+          .map<User>((user) => User.fromJson(user))
+          .toList();
+    } catch(e) {
+      throw e;
+    }
   }
 
   void createContact(User user) async =>

lib/src/resources/conversation_api_provider.dart

@@ -5,9 +5,18 @@ import "dart:convert";
 import "../models/conversation_model.dart";
 import "../models/user_model.dart";
 
+import "../services/cache_http.dart";
+
 import "../../settings.dart";
 
 class ConversationApiProvider {
+  CacheHttp cache;
+
+  Future<void> init() async {
+    this.cache = new CacheHttp();
+    await this.cache.init();
+  }
+
   Future<Conversation> createConversation(String title) async {
     final response = await http.post("$baseUrlCore/user/conversation",
         headers: {"Content-Type": "application/json"},
@@ -20,27 +29,34 @@ class ConversationApiProvider {
       await http.delete("$baseUrlCore/user/conversation/$id");
 
   Future<List<Conversation>> fetchConversations() async {
-    final response =
-        await http.get("$baseUrlCore/user/$globalUserId/conversation");
-
-    return jsonDecode(response.body)
-        .map<Conversation>(
-            (conversation) => Conversation.fromJson(conversation))
-        .toList();
+    try {
+      final responseBody = await this.cache.fetch("$baseUrlCore/user/$globalUserId/conversation");
+      return jsonDecode(responseBody)
+          .map<Conversation>(
+              (conversation) => Conversation.fromJson(conversation))
+          .toList();
+    } catch(e) {
+      throw e;
+    }
   }
 
   Future<Conversation> fetchConversation(String id) async {
-    final response = await http.get("baseUrlCore/user/conversation/$id");
-
-    return Conversation.fromJson(jsonDecode(response.body));
+    try {
+      final responseBody = await this.cache.fetch("$baseUrlCore/user/conversation/$id");
+      return Conversation.fromJson(jsonDecode(responseBody));
+    } catch(e) {
+      throw e;
+    }
   }
 
   Future<List<User>> fetchConversationMembers(String id) async {
-    final response = await http
-        .get("$baseUrlCore/user/$globalUserId/conversation/$id/member");
-
-    return jsonDecode(response.body)
-        .map<User>((user) => User.fromJson(user))
-        .toList();
+    try {
+      final responseBody = await this.cache.fetch("$baseUrlCore/user/$globalUserId/conversation/$id/member");
+      return jsonDecode(responseBody)
+          .map<User>((user) => User.fromJson(user))
+          .toList();
+    } catch(e) {
+      throw e;
+    }
   }
 }

lib/src/resources/user_api_provider.dart

@@ -3,9 +3,17 @@ import "dart:convert";
 import "package:http/http.dart" as http;
 
 import "../models/user_model.dart";
+import "../services/cache_http.dart";
 import "../../settings.dart";
 
 class UserApiProvider {
+  CacheHttp cache;
+
+  Future<void> init() async {
+    this.cache = new CacheHttp();
+    await this.cache.init();
+  }
+
   Future<User> createUser(User user) async {
     // Prob need to add the headers
     final response = await http.post("$baseUrlCore/user",
@@ -15,15 +23,20 @@ class UserApiProvider {
   }
 
   Future<User> fetchUserByPhone(String phoneNumber) async {
-    final uri = Uri.https(baseUrlCore, "/user", {"phone_number": phoneNumber});
-    final response = await http.get(uri);
-
-    return User.fromJson(jsonDecode(response.body));
+    try {
+      final responseBody = await this.cache.fetch("$baseUrlCore/user?phone_number=$phoneNumber");
+      return User.fromJson(jsonDecode(responseBody));
+    } catch(e) {
+      throw e;
+    }
   }
 
   Future<User> fetchUserById(String id) async {
-    final response = await http.get("$baseUrlCore/user/id/$id");
-
-    return User.fromJson(jsonDecode(response.body));
+    try {
+      final responseBody = await this.cache.fetch("$baseUrlCore/user/id/$id");
+      return User.fromJson(jsonDecode(responseBody));
+    } catch(e) {
+      throw e;
+    }
   }
 }

lib/src/services/cache_http.dart

@@ -4,7 +4,7 @@ import "package:http/http.dart" as http;
 
 import 'package:sqflite/sqflite.dart';
 
-class CacheManager {
+class CacheHttp {
   Database db;
 
   // Call this immediately after instantiating new CacheManager