docs: update README to reflect current project structure

Author: flow-pie

README.md

@@ -81,6 +81,10 @@ dependencies {
     implementation("com.squareup.retrofit2:retrofit:2.9.0")
     implementation("com.squareup.retrofit2:converter-gson:2.9.0")
 
+
+// OkHttp
+    implementation("com.squareup.okhttp3:okhttp:4.12.0")
+    implementation("com.squareup.okhttp3:logging-interceptor:4.12.0")
     // Coroutines
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.7.3")
 

apps/android/ChamaApp/app/build.gradle.kts

@@ -12,10 +12,11 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.tooling.preview.Preview
 import com.example.chama.ui.theme.ChamaAppTheme
-
+import com.example.chama.network.TokenManager
 class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        TokenManager.init(this)
         enableEdgeToEdge()
         setContent {
             ChamaAppTheme {

apps/android/ChamaApp/app/src/main/java/com/example/chama/MainActivity.kt

@@ -0,0 +1,9 @@
+package com.example.chama.models
+
+
+data class BaseResponse<T>(
+    val success: Boolean,
+    val message: String,
+    val data: T? = null,
+    val error: String? = null
+)

apps/android/ChamaApp/app/src/main/java/com/example/chama/models/BaseResponse.kt

@@ -0,0 +1,9 @@
+package com.example.chama.models
+
+data class GroupModel(
+    val id: Long? = null,
+    val name: String,
+    val description: String,
+    val creatorId: Long,
+    val targetAmount: Double
+)

apps/android/ChamaApp/app/src/main/java/com/example/chama/models/GroupModel.kt

@@ -0,0 +1,10 @@
+package com.example.chama.models
+
+data class LoanModel(
+    val id: Long? = null,
+    val borrowerId: Long,
+    val groupId: Long,
+    val amount: Double,
+    val durationInMonths: Int,
+    val purpose: String
+)

apps/android/ChamaApp/app/src/main/java/com/example/chama/models/LoanModel.kt

@@ -0,0 +1,9 @@
+package com.example.chama.models
+
+data class UserModel(
+    val id: Long? = null,
+    val email: String,
+    val firstName: String,
+    val lastName: String,
+    val phoneNumber: String
+)

apps/android/ChamaApp/app/src/main/java/com/example/chama/models/UserModel.kt

@@ -1,11 +1,32 @@
 package com.example.chama.network
 
+import com.example.chama.models.BaseResponse
+import com.example.chama.models.GroupModel
+import com.example.chama.models.LoanModel
+import com.example.chama.models.UserModel
 import retrofit2.Response
-import retrofit2.http.GET
+import retrofit2.http.*
 
 interface ApiService {
 
-    @GET("users")
-    suspend fun getUsers(): Response<List<String>>
+    // User endpoints
+    @POST("users")
+    suspend fun createUser(@Body user: UserModel): Response<BaseResponse<UserModel>>
 
-}
+    @GET("users/{id}")
+    suspend fun getUser(@Path("id") id: Long): Response<BaseResponse<UserModel>>
+
+    // Group endpoints
+    @POST("groups")
+    suspend fun createGroup(@Body group: GroupModel): Response<BaseResponse<GroupModel>>
+
+    @GET("groups")
+    suspend fun getGroups(): Response<BaseResponse<List<GroupModel>>>
+
+    // Loan endpoints
+    @POST("loans")
+    suspend fun requestLoan(@Body loan: LoanModel): Response<BaseResponse<LoanModel>>
+
+    @GET("loans/{id}")
+    suspend fun getLoan(@Path("id") id: Long): Response<BaseResponse<LoanModel>>
+}

apps/android/ChamaApp/app/src/main/java/com/example/chama/network/ApiService.kt

@@ -0,0 +1,27 @@
+package com.example.chama.network
+
+import okhttp3.Interceptor
+import okhttp3.Response
+
+class AuthInterceptor : Interceptor {
+
+    override fun intercept(chain: Interceptor.Chain): Response {
+        val originalRequest = chain.request()
+
+        // Get token from SharedPreferences or TokenManager
+        val token = TokenManager.getToken()
+
+        val newRequest = if (token != null) {
+            originalRequest.newBuilder()
+                .header("Authorization", "Bearer $token")
+                .header("Content-Type", "application/json")
+                .build()
+        } else {
+            originalRequest.newBuilder()
+                .header("Content-Type", "application/json")
+                .build()
+        }
+
+        return chain.proceed(newRequest)
+    }
+}

apps/android/ChamaApp/app/src/main/java/com/example/chama/network/AuthInterceptor.kt

@@ -0,0 +1,29 @@
+package com.example.chama.network
+
+import retrofit2.Response
+
+object ErrorHandler {
+
+    fun <T> handleResponse(response: Response<T>): Result<T> {
+        return when {
+            response.isSuccessful -> {
+                response.body()?.let {
+                    Result.success(it)
+                } ?: Result.failure(Exception("Empty response body"))
+            }
+            response.code() == 401 -> {
+                TokenManager.clearToken()
+                Result.failure(Exception("Unauthorized. Please login again."))
+            }
+            response.code() == 404 -> {
+                Result.failure(Exception("Resource not found."))
+            }
+            response.code() == 500 -> {
+                Result.failure(Exception("Server error. Please try again later."))
+            }
+            else -> {
+                Result.failure(Exception("Error: ${response.code()} ${response.message()}"))
+            }
+        }
+    }
+}