implemented a base for the file export to json

app/src/main/java/com/faraphel/tasks_valider/MainActivity.kt

@@ -17,7 +17,6 @@ class MainActivity : ComponentActivity() {
     private var bwdManager: BwdManager? = null  ///< the WiFi-Direct helper
     private lateinit var database: TaskDatabase  ///< the database manager
 
-    @RequiresApi(Build.VERSION_CODES.O)
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 

app/src/main/java/com/faraphel/tasks_valider/database/api/client/entities/base/BaseClientApi.kt

@@ -39,7 +39,6 @@ abstract class BaseClientApi<Entity: BaseEntity>(
      */
     fun getAll(): List<Entity> {
         // try to obtain the list of validations
-        Log.i("base-api", this.getEndpoint())
         val response = client.get(this.getEndpoint())
 
         // in case of error, notify it
@@ -47,7 +46,6 @@ abstract class BaseClientApi<Entity: BaseEntity>(
             throw HttpException(response.code)
 
         val data = response.body.string()
-        Log.i("base-api", data)
 
         // parse the list of validations
         return parser.fromJson(

app/src/main/java/com/faraphel/tasks_valider/ui/screen/task/session.kt

@@ -1,8 +1,13 @@
 package com.faraphel.tasks_valider.ui.screen.task
 
 import android.app.Activity
+import android.app.Activity.RESULT_OK
+import android.content.Intent
+import android.os.Environment
 import android.util.Log
 import android.widget.Toast
+import androidx.activity.result.ActivityResultLauncher
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.layout.*
 import androidx.compose.material3.Button
 import androidx.compose.material3.Text
@@ -16,7 +21,10 @@ import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
 import com.faraphel.tasks_valider.connectivity.task.TaskClient
+import com.faraphel.tasks_valider.connectivity.task.session.TaskRole
 import com.faraphel.tasks_valider.database.entities.PersonEntity
+import com.faraphel.tasks_valider.utils.parser
+import java.io.File
 
 
 @Composable
@@ -102,12 +110,14 @@ fun TaskSessionScreen(
             Button(onClick = { controller.navigate("quick_validation") }) {
                 Text("Quick Validation")
             }
+            Button(onClick = { Thread { exportToFile(activity, client) }.start() }) {
+                Text("Export")
+            }
         }
     }
 }
 
 
-// TODO(Faraphel): template this function ?
 fun refreshStudents(
     activity: Activity,
     client: TaskClient,
@@ -124,3 +134,56 @@ fun refreshStudents(
         }
     }
 }
+
+
+fun exportToFile(
+    activity: Activity,
+    client: TaskClient,
+) {
+    // get all the values to export
+    val allPersons = client.personApi.getAll()
+    val allStudents = allPersons.filter { student -> student.role == TaskRole.STUDENT }
+    val allRelationsStudentSessionSubject = client.relationPersonSessionSubjectApi.getAll()
+    val allSubjects = client.subjectApi.getAll()
+    val allTasks = client.taskApi.getAll()
+    val allValidations = client.validationApi.getAll()
+
+    // for each student
+
+    val data = allStudents.map { student ->
+        // fetch their subject
+        val relationStudentSessionObject = allRelationsStudentSessionSubject.first { relation ->
+            relation.studentId == student.id
+        }
+        val subject = allSubjects.first { subject -> subject.id == relationStudentSessionObject.subjectId }
+        // get the tasks of this person
+        val tasks = allTasks.filter { task -> task.subjectId == subject.id }
+
+        // for all the tasks
+        val studentTasksData = tasks.map { task ->
+            // if a validation match
+            val isValidated = allValidations.any { validation -> validation.taskId == task.id }
+            // return the pair of the task title and its validation
+            mapOf(
+                "name" to task.title,
+                "validated" to isValidated,
+            )
+        }
+
+        // return the name of the student associated to his data
+        mapOf(
+            "name" to student.fullName(),
+            "subject" to subject.name,
+            "tasks" to studentTasksData,
+        )
+    }
+
+    val dataJson = parser.toJson(data)
+    Log.i("export", dataJson)
+
+    // write all the data in a json file
+    val file = File(activity.filesDir, "test.json")
+    file.writeText(dataJson)
+
+    // TODO(Faraphel): prompt to open the file ?
+}