Replaced the database to match the new schema

app/src/main/java/com/faraphel/tasks_valider/database/TaskDatabase.kt

@@ -4,33 +4,24 @@ import androidx.room.Database
 import androidx.room.RoomDatabase
 import androidx.room.TypeConverters
 import com.faraphel.tasks_valider.database.converters.InstantConverter
-import com.faraphel.tasks_valider.database.dao.GroupDao
+import com.faraphel.tasks_valider.database.dao.*
-import com.faraphel.tasks_valider.database.dao.GroupStudentDao
+import com.faraphel.tasks_valider.database.entities.*
-import com.faraphel.tasks_valider.database.dao.StudentDao
-import com.faraphel.tasks_valider.database.dao.TaskDao
-import com.faraphel.tasks_valider.database.dao.TaskGroupDao
-import com.faraphel.tasks_valider.database.dao.TeacherDao
-import com.faraphel.tasks_valider.database.entities._old.GroupEntity
-import com.faraphel.tasks_valider.database.entities._old.GroupStudentEntity
-import com.faraphel.tasks_valider.database.entities._old.StudentEntity
-import com.faraphel.tasks_valider.database.entities._old.TaskEntity
-import com.faraphel.tasks_valider.database.entities._old.TaskGroupEntity
-import com.faraphel.tasks_valider.database.entities._old.TeacherEntity
 
 
 /**
- * The database for the tasks application.
+ * The database for the tasks' application.
  * Contains the entities and the relations between them.
  */
 @Database(
     entities = [
-        GroupEntity::class,
+        ClassEntity::class,
-        StudentEntity::class,
+        PersonEntity::class,
-        TeacherEntity::class,
+        SessionEntity::class,
+        SubjectEntity::class,
         TaskEntity::class,
+        ValidationEntity::class,
 
-        GroupStudentEntity::class,
+        RelationClassPersonEntity::class,
-        TaskGroupEntity::class,
     ],
     version = 1
 )
@@ -38,11 +29,12 @@ import com.faraphel.tasks_valider.database.entities._old.TeacherEntity
     InstantConverter::class
 )
 abstract class TaskDatabase: RoomDatabase() {
-    abstract fun groupDao(): GroupDao
+    abstract fun classDao(): ClassDao
-    abstract fun studentDao(): StudentDao
+    abstract fun personDao(): PersonDao
-    abstract fun teacherDao(): TeacherDao
+    abstract fun sessionDao(): SessionDao
+    abstract fun subjectDao(): SubjectDao
     abstract fun taskDao(): TaskDao
+    abstract fun validationDao(): ValidationDao
 
-    abstract fun groupStudentDao(): GroupStudentDao
+    abstract fun relationClassPersonDao(): RelationClassPersonDao
-    abstract fun taskGroupDao(): TaskGroupDao
 }

app/src/main/java/com/faraphel/tasks_valider/database/api/TaskDatabaseApi.kt

@@ -5,17 +5,19 @@ import com.faraphel.tasks_valider.connectivity.task.session.TaskSession
 import com.faraphel.tasks_valider.database.TaskDatabase
 import com.faraphel.tasks_valider.database.api.entities.*
 import com.faraphel.tasks_valider.database.api.entities.base.BaseApi
+import com.faraphel.tasks_valider.database.entities.*
 import fi.iki.elonen.NanoHTTPD
 
 class TaskDatabaseApi(private val database: TaskDatabase) {
     private val api: Map<String, BaseApi> = mapOf(
-        "group" to GroupApi(this.database.groupDao()),
+        ClassEntity.TABLE_NAME to ClassApi(this.database.classDao()),
-        "student" to StudentApi(this.database.studentDao()),
+        PersonEntity.TABLE_NAME to PersonApi(this.database.personDao()),
-        "teacher" to TeacherApi(this.database.teacherDao()),
+        SessionEntity.TABLE_NAME to SessionApi(this.database.sessionDao()),
-        "task" to TaskApi(this.database.taskDao()),
+        SubjectEntity.TABLE_NAME to SubjectApi(this.database.subjectDao()),
+        TaskEntity.TABLE_NAME to TaskApi(this.database.taskDao()),
+        ValidationEntity.TABLE_NAME to ValidationApi(this.database.validationDao()),
 
-        "group_student" to GroupStudentApi(this.database.groupStudentDao()),
+        RelationClassPersonEntity.TABLE_NAME to RelationClassPersonApi(this.database.relationClassPersonDao()),
-        "task_group" to TaskGroupApi(this.database.taskGroupDao()),
     )
 
     /**

app/src/main/java/com/faraphel/tasks_valider/database/api/entities/ClassApi.kt

@@ -2,6 +2,6 @@ package com.faraphel.tasks_valider.database.api.entities
 
 import com.faraphel.tasks_valider.database.api.entities.base.BaseJsonApi
 import com.faraphel.tasks_valider.database.dao.base.BaseDao
-import com.faraphel.tasks_valider.database.entities._old.GroupEntity
+import com.faraphel.tasks_valider.database.entities.ClassEntity
 
-class GroupApi(dao: BaseDao<GroupEntity>) : BaseJsonApi<GroupEntity>(dao)
+class ClassApi(dao: BaseDao<ClassEntity>) : BaseJsonApi<ClassEntity>(dao)

app/src/main/java/com/faraphel/tasks_valider/database/api/entities/GroupStudentApi.kt

@@ -1,7 +0,0 @@
-package com.faraphel.tasks_valider.database.api.entities
-
-import com.faraphel.tasks_valider.database.api.entities.base.BaseJsonApi
-import com.faraphel.tasks_valider.database.dao.base.BaseDao
-import com.faraphel.tasks_valider.database.entities._old.GroupStudentEntity
-
-class GroupStudentApi(dao: BaseDao<GroupStudentEntity>) : BaseJsonApi<GroupStudentEntity>(dao)

app/src/main/java/com/faraphel/tasks_valider/database/api/entities/PersonApi.kt

@@ -2,6 +2,6 @@ package com.faraphel.tasks_valider.database.api.entities
 
 import com.faraphel.tasks_valider.database.api.entities.base.BaseJsonApi
 import com.faraphel.tasks_valider.database.dao.base.BaseDao
-import com.faraphel.tasks_valider.database.entities._old.TeacherEntity
+import com.faraphel.tasks_valider.database.entities.PersonEntity
 
-class TeacherApi(dao: BaseDao<TeacherEntity>) : BaseJsonApi<TeacherEntity>(dao)
+class PersonApi(dao: BaseDao<PersonEntity>) : BaseJsonApi<PersonEntity>(dao)

app/src/main/java/com/faraphel/tasks_valider/database/api/entities/RelationClassPersonApi.kt

@@ -0,0 +1,7 @@
+package com.faraphel.tasks_valider.database.api.entities
+
+import com.faraphel.tasks_valider.database.api.entities.base.BaseJsonApi
+import com.faraphel.tasks_valider.database.dao.base.BaseDao
+import com.faraphel.tasks_valider.database.entities.RelationClassPersonEntity
+
+class RelationClassPersonApi(dao: BaseDao<RelationClassPersonEntity>) : BaseJsonApi<RelationClassPersonEntity>(dao)

app/src/main/java/com/faraphel/tasks_valider/database/api/entities/SessionApi.kt

@@ -2,6 +2,6 @@ package com.faraphel.tasks_valider.database.api.entities
 
 import com.faraphel.tasks_valider.database.api.entities.base.BaseJsonApi
 import com.faraphel.tasks_valider.database.dao.base.BaseDao
-import com.faraphel.tasks_valider.database.entities._old.StudentEntity
+import com.faraphel.tasks_valider.database.entities.SessionEntity
 
-class StudentApi(dao: BaseDao<StudentEntity>) : BaseJsonApi<StudentEntity>(dao)
+class SessionApi(dao: BaseDao<SessionEntity>) : BaseJsonApi<SessionEntity>(dao)

app/src/main/java/com/faraphel/tasks_valider/database/api/entities/SubjectApi.kt

@@ -2,6 +2,6 @@ package com.faraphel.tasks_valider.database.api.entities
 
 import com.faraphel.tasks_valider.database.api.entities.base.BaseJsonApi
 import com.faraphel.tasks_valider.database.dao.base.BaseDao
-import com.faraphel.tasks_valider.database.entities._old.TaskGroupEntity
+import com.faraphel.tasks_valider.database.entities.SubjectEntity
 
-class TaskGroupApi(dao: BaseDao<TaskGroupEntity>) : BaseJsonApi<TaskGroupEntity>(dao)
+class SubjectApi(dao: BaseDao<SubjectEntity>) : BaseJsonApi<SubjectEntity>(dao)

app/src/main/java/com/faraphel/tasks_valider/database/api/entities/TaskApi.kt

@@ -2,6 +2,6 @@ package com.faraphel.tasks_valider.database.api.entities
 
 import com.faraphel.tasks_valider.database.api.entities.base.BaseJsonApi
 import com.faraphel.tasks_valider.database.dao.base.BaseDao
-import com.faraphel.tasks_valider.database.entities._old.TaskEntity
+import com.faraphel.tasks_valider.database.entities.TaskEntity
 
 class TaskApi(dao: BaseDao<TaskEntity>) : BaseJsonApi<TaskEntity>(dao)

app/src/main/java/com/faraphel/tasks_valider/database/api/entities/ValidationApi.kt

@@ -0,0 +1,7 @@
+package com.faraphel.tasks_valider.database.api.entities
+
+import com.faraphel.tasks_valider.database.api.entities.base.BaseJsonApi
+import com.faraphel.tasks_valider.database.dao.base.BaseDao
+import com.faraphel.tasks_valider.database.entities.ValidationEntity
+
+class ValidationApi(dao: BaseDao<ValidationEntity>) : BaseJsonApi<ValidationEntity>(dao)

app/src/main/java/com/faraphel/tasks_valider/database/dao/ClassDao.kt

@@ -0,0 +1,40 @@
+package com.faraphel.tasks_valider.database.dao
+
+import androidx.room.Dao
+import androidx.room.Query
+import com.faraphel.tasks_valider.database.dao.base.BaseDao
+import com.faraphel.tasks_valider.database.entities.ClassEntity
+import com.faraphel.tasks_valider.database.entities.PersonEntity
+import com.faraphel.tasks_valider.database.entities.RelationClassPersonEntity
+import com.faraphel.tasks_valider.database.entities.SessionEntity
+
+@Dao
+interface ClassDao : BaseDao<ClassEntity> {
+    @Query("SELECT * FROM ${ClassEntity.TABLE_NAME}")
+    override fun getAll(): List<ClassEntity>
+
+    /**
+     * Get the object from its identifier
+     */
+    @Query("SELECT * FROM ${ClassEntity.TABLE_NAME} WHERE id = :id")
+    fun getById(id: Long): ClassEntity
+
+    /**
+     * Get all the sessions this class attended
+     * @param id the id of the class
+     */
+    @Query("SELECT * FROM ${SessionEntity.TABLE_NAME} WHERE class_id = :id")
+    fun getSessions(id: Long): List<SessionEntity>
+
+    /**
+     * Get all the students in a class
+     * @param id the id of the class
+     */
+    @Query(
+        "SELECT * FROM ${PersonEntity.TABLE_NAME} " +
+        "JOIN ${RelationClassPersonEntity.TABLE_NAME} " +
+        "ON ${PersonEntity.TABLE_NAME}.id = ${RelationClassPersonEntity.TABLE_NAME}.student_id " +
+        "WHERE ${RelationClassPersonEntity.TABLE_NAME}.class_id = :id"
+    )
+    fun getStudents(id: Long): List<PersonEntity>
+}

app/src/main/java/com/faraphel/tasks_valider/database/dao/GroupDao.kt

@@ -1,28 +0,0 @@
-package com.faraphel.tasks_valider.database.dao
-
-import androidx.room.Dao
-import androidx.room.Query
-import androidx.room.RewriteQueriesToDropUnusedColumns
-import com.faraphel.tasks_valider.database.dao.base.BaseDao
-import com.faraphel.tasks_valider.database.entities._old.GroupEntity
-
-
-@Dao
-interface GroupDao : BaseDao<GroupEntity> {
-    @Query("SELECT * FROM `groups`")
-    override fun getAll(): List<GroupEntity>
-
-    @Query("SELECT * FROM `groups` WHERE id = :id")
-    fun getById(id: Long): GroupEntity
-
-    /**
-    Allow to get all groups with a specific student
-     */
-    @Query(
-        "SELECT * FROM `groups` " +
-        "JOIN `group_student` ON `groups`.id = `group_student`.student_id " +
-        "WHERE `group_student`.student_id = :studentId"
-    )
-    @RewriteQueriesToDropUnusedColumns
-    fun filterByStudentId(studentId: Long): List<GroupEntity>
-}

app/src/main/java/com/faraphel/tasks_valider/database/dao/GroupStudentDao.kt

@@ -1,16 +0,0 @@
-package com.faraphel.tasks_valider.database.dao
-
-import androidx.room.Dao
-import androidx.room.Query
-import com.faraphel.tasks_valider.database.dao.base.BaseDao
-import com.faraphel.tasks_valider.database.entities._old.GroupStudentEntity
-
-
-@Dao
-interface GroupStudentDao : BaseDao<GroupStudentEntity> {
-    @Query("SELECT * FROM `group_student`")
-    override fun getAll(): List<GroupStudentEntity>
-
-    @Query("SELECT * FROM `group_student` WHERE group_id = :groupId AND student_id = :studentId")
-    fun getById(groupId: Long, studentId: Long): GroupStudentEntity
-}

app/src/main/java/com/faraphel/tasks_valider/database/dao/PersonDao.kt

@@ -0,0 +1,44 @@
+package com.faraphel.tasks_valider.database.dao
+
+import androidx.room.Dao
+import androidx.room.Query
+import com.faraphel.tasks_valider.database.dao.base.BaseDao
+import com.faraphel.tasks_valider.database.entities.*
+
+@Dao
+interface PersonDao : BaseDao<PersonEntity> {
+    @Query("SELECT * FROM ${PersonEntity.TABLE_NAME}")
+    override fun getAll(): List<PersonEntity>
+
+    /**
+     * Get the object from its identifier
+     */
+    @Query("SELECT * FROM ${PersonEntity.TABLE_NAME} WHERE id = :id")
+    fun getById(id: Long): PersonEntity
+
+    /**
+     * Allow to get all the classes the person is attending as a student
+     */
+    @Query(
+        "SELECT * FROM ${ClassEntity.TABLE_NAME} " +
+        "JOIN ${RelationClassPersonEntity.TABLE_NAME} " +
+        "ON ${ClassEntity.TABLE_NAME}.id = ${RelationClassPersonEntity.TABLE_NAME}.student_id " +
+        "WHERE ${RelationClassPersonEntity.TABLE_NAME}.student_id = :id"
+    )
+    fun getClasses(id: Long): List<ClassEntity>
+
+
+    /**
+     * Get all the tasks this user approved as a teacher
+     * @param id the id of the person
+     */
+    @Query("SELECT * FROM ${ValidationEntity.TABLE_NAME} WHERE teacher_id = :id")
+    fun getTasksApproved(id: Long): List<ValidationEntity>
+
+    /**
+     * Get all the tasks this user validated as a student
+     * @param id the id of the person
+     */
+    @Query("SELECT * FROM ${ValidationEntity.TABLE_NAME} WHERE student_id = :id")
+    fun getTasksValidated(id: Long): List<ValidationEntity>
+}

app/src/main/java/com/faraphel/tasks_valider/database/dao/RelationClassPersonDao.kt

@@ -0,0 +1,23 @@
+package com.faraphel.tasks_valider.database.dao
+
+import androidx.room.Dao
+import androidx.room.Query
+import com.faraphel.tasks_valider.database.dao.base.BaseDao
+import com.faraphel.tasks_valider.database.entities.RelationClassPersonEntity
+
+@Dao
+interface RelationClassPersonDao : BaseDao<RelationClassPersonEntity> {
+    @Query("SELECT * FROM ${RelationClassPersonEntity.TABLE_NAME}")
+    override fun getAll(): List<RelationClassPersonEntity>
+
+    /**
+     * Get the object from its identifiers
+     */
+    @Query(
+        "SELECT * FROM ${RelationClassPersonEntity.TABLE_NAME} " +
+        "WHERE " +
+        "class_id = :classId AND " +
+        "student_id = :studentId"
+    )
+    fun getById(classId: Long, studentId: Long): RelationClassPersonEntity
+}

app/src/main/java/com/faraphel/tasks_valider/database/dao/SessionDao.kt

@@ -0,0 +1,18 @@
+package com.faraphel.tasks_valider.database.dao
+
+import androidx.room.Dao
+import androidx.room.Query
+import com.faraphel.tasks_valider.database.dao.base.BaseDao
+import com.faraphel.tasks_valider.database.entities.SessionEntity
+
+@Dao
+interface SessionDao : BaseDao<SessionEntity> {
+    @Query("SELECT * FROM ${SessionEntity.TABLE_NAME}")
+    override fun getAll(): List<SessionEntity>
+
+    /**
+     * Get the object from its identifier
+     */
+    @Query("SELECT * FROM ${SessionEntity.TABLE_NAME} WHERE id = :id")
+    fun getById(id: Long): SessionEntity
+}

app/src/main/java/com/faraphel/tasks_valider/database/dao/StudentDao.kt

@@ -1,29 +0,0 @@
-package com.faraphel.tasks_valider.database.dao
-
-import androidx.room.Dao
-import androidx.room.Query
-import androidx.room.RewriteQueriesToDropUnusedColumns
-import com.faraphel.tasks_valider.database.dao.base.BaseDao
-import com.faraphel.tasks_valider.database.entities._old.StudentEntity
-
-
-@Dao
-interface StudentDao : BaseDao<StudentEntity> {
-    @Query("SELECT * FROM `students`")
-    override fun getAll(): List<StudentEntity>
-
-    @Query("SELECT * FROM `students` WHERE id = :id")
-    fun getById(id: Long): StudentEntity
-
-
-    /**
-    Allow to get all the students in a group
-     */
-    @Query(
-        "SELECT * FROM `students` " +
-        "JOIN `group_student` ON `students`.id = `group_student`.student_id " +
-        "WHERE `group_student`.group_id = :groupId"
-    )
-    @RewriteQueriesToDropUnusedColumns
-    fun filterByGroupId(groupId: Long): List<StudentEntity>
-}

app/src/main/java/com/faraphel/tasks_valider/database/dao/SubjectDao.kt

@@ -0,0 +1,27 @@
+package com.faraphel.tasks_valider.database.dao
+
+import androidx.room.Dao
+import androidx.room.Query
+import com.faraphel.tasks_valider.database.dao.base.BaseDao
+import com.faraphel.tasks_valider.database.entities.SessionEntity
+import com.faraphel.tasks_valider.database.entities.SubjectEntity
+import com.faraphel.tasks_valider.database.entities.TaskEntity
+
+@Dao
+interface SubjectDao : BaseDao<SubjectEntity> {
+    @Query("SELECT * FROM ${SubjectEntity.TABLE_NAME}")
+    override fun getAll(): List<SubjectEntity>
+
+    /**
+     * Get the object from its identifier
+     */
+    @Query("SELECT * FROM ${SubjectEntity.TABLE_NAME} WHERE id = :id")
+    fun getById(id: Long): SubjectEntity
+
+    /**
+     * Get all the tasks available in a subject
+     * @param id the id of the subject
+     */
+    @Query("SELECT * FROM ${TaskEntity.TABLE_NAME} WHERE subject_id = :id")
+    fun getSessions(id: Long): List<SessionEntity>
+}

app/src/main/java/com/faraphel/tasks_valider/database/dao/TaskDao.kt

@@ -2,27 +2,25 @@ package com.faraphel.tasks_valider.database.dao
 
 import androidx.room.Dao
 import androidx.room.Query
-import androidx.room.RewriteQueriesToDropUnusedColumns
 import com.faraphel.tasks_valider.database.dao.base.BaseDao
-import com.faraphel.tasks_valider.database.entities._old.TaskEntity
+import com.faraphel.tasks_valider.database.entities.TaskEntity
-
+import com.faraphel.tasks_valider.database.entities.ValidationEntity
 
 @Dao
 interface TaskDao : BaseDao<TaskEntity> {
-    @Query("SELECT * FROM `tasks`")
+    @Query("SELECT * FROM ${TaskEntity.TABLE_NAME}")
     override fun getAll(): List<TaskEntity>
 
-    @Query("SELECT * FROM `tasks` WHERE id = :id")
+    /**
+     * Get the object from its identifier
+     */
+    @Query("SELECT * FROM ${TaskEntity.TABLE_NAME} WHERE id = :id")
     fun getById(id: Long): TaskEntity
 
     /**
-    Get all the tasks for a specific group
+     * Get all the validations have been approved for this tasks
+     * @param id the id of the task
      */
-    @Query(
+    @Query("SELECT * FROM ${ValidationEntity.TABLE_NAME} WHERE task_id = :id")
-        "SELECT * FROM `tasks` " +
+    fun getTasksValidated(id: Long): List<ValidationEntity>
-        "JOIN `task_group` ON `tasks`.id = `task_group`.task_id " +
-        "WHERE `task_group`.group_id = :groupId"
-    )
-    @RewriteQueriesToDropUnusedColumns
-    fun filterByGroupId(groupId: Long): List<TaskEntity>
 }

app/src/main/java/com/faraphel/tasks_valider/database/dao/TaskGroupDao.kt

@@ -1,16 +0,0 @@
-package com.faraphel.tasks_valider.database.dao
-
-import androidx.room.Dao
-import androidx.room.Query
-import com.faraphel.tasks_valider.database.dao.base.BaseDao
-import com.faraphel.tasks_valider.database.entities._old.TaskGroupEntity
-
-
-@Dao
-interface TaskGroupDao : BaseDao<TaskGroupEntity> {
-    @Query("SELECT * FROM `task_group`")
-    override fun getAll(): List<TaskGroupEntity>
-
-    @Query("SELECT * FROM `task_group` WHERE task_id = :taskId AND group_id = :groupId")
-    fun getById(taskId: Long, groupId: Long): TaskGroupEntity
-}

app/src/main/java/com/faraphel/tasks_valider/database/dao/TeacherDao.kt

@@ -1,16 +0,0 @@
-package com.faraphel.tasks_valider.database.dao
-
-import androidx.room.Dao
-import androidx.room.Query
-import com.faraphel.tasks_valider.database.dao.base.BaseDao
-import com.faraphel.tasks_valider.database.entities._old.TeacherEntity
-
-
-@Dao
-interface TeacherDao : BaseDao<TeacherEntity> {
-    @Query("SELECT * FROM `teachers`")
-    override fun getAll(): List<TeacherEntity>
-
-    @Query("SELECT * FROM `teachers` WHERE id = :id")
-    fun getById(id: Long): TeacherEntity
-}

app/src/main/java/com/faraphel/tasks_valider/database/dao/ValidationDao.kt

@@ -0,0 +1,24 @@
+package com.faraphel.tasks_valider.database.dao
+
+import androidx.room.Dao
+import androidx.room.Query
+import com.faraphel.tasks_valider.database.dao.base.BaseDao
+import com.faraphel.tasks_valider.database.entities.ValidationEntity
+
+@Dao
+interface ValidationDao : BaseDao<ValidationEntity> {
+    @Query("SELECT * FROM ${ValidationEntity.TABLE_NAME}")
+    override fun getAll(): List<ValidationEntity>
+
+    /**
+     * Get the object from its identifiers
+     */
+    @Query(
+        "SELECT * FROM ${ValidationEntity.TABLE_NAME} " +
+        "WHERE " +
+        "teacher_id = :teacherId and " +
+        "student_id = :studentId and " +
+        "task_id = :taskId"
+    )
+    fun getById(teacherId: Long, studentId: Long, taskId: Long): ValidationEntity
+}

app/src/main/java/com/faraphel/tasks_valider/database/entities/ClassEntity.kt

@@ -5,8 +5,13 @@ import androidx.room.Entity
 import androidx.room.PrimaryKey
 import com.faraphel.tasks_valider.database.entities.base.BaseEntity
 
-@Entity(tableName = "classes")
+
+@Entity(tableName = ClassEntity.TABLE_NAME)
 data class ClassEntity (
     @ColumnInfo("id") @PrimaryKey(autoGenerate = true) val id: Long = 0,
     @ColumnInfo("name") val name: String,
-) : BaseEntity()
+) : BaseEntity() {
+    companion object {
+        const val TABLE_NAME = "classes"
+    }
+}

app/src/main/java/com/faraphel/tasks_valider/database/entities/PersonEntity.kt

@@ -6,10 +6,14 @@ import androidx.room.PrimaryKey
 import com.faraphel.tasks_valider.database.entities.base.BaseEntity
 import java.util.*
 
-@Entity(tableName = "students")
+@Entity(tableName = PersonEntity.TABLE_NAME)
-data class StudentEntity (
+data class PersonEntity (
     @ColumnInfo("id") @PrimaryKey(autoGenerate = true) val id: Long = 0,
     @ColumnInfo("first_name") val firstName: String,
     @ColumnInfo("last_name") val lastName: String,
     @ColumnInfo("card_id") val cardId: UUID,
-) : BaseEntity()
+) : BaseEntity() {
+    companion object {
+        const val TABLE_NAME = "persons"
+    }
+}

app/src/main/java/com/faraphel/tasks_valider/database/entities/RelationClassPersonEntity.kt

@@ -1,4 +1,4 @@
-package com.faraphel.tasks_valider.database.entities._old
+package com.faraphel.tasks_valider.database.entities
 
 import androidx.room.ColumnInfo
 import androidx.room.Entity
@@ -6,27 +6,31 @@ import androidx.room.ForeignKey
 import com.faraphel.tasks_valider.database.entities.base.BaseEntity
 
 @Entity(
-    tableName = "group_student",
+    tableName = RelationClassPersonEntity.TABLE_NAME,
     primaryKeys = [
-        "group_id",
+        "student_id",
-        "student_id"
+        "class_id",
     ],
     foreignKeys = [
         ForeignKey(
-            entity = GroupEntity::class,
+            entity = PersonEntity::class,
-            parentColumns = ["id"],
-            childColumns = ["group_id"],
-            onDelete = ForeignKey.CASCADE
-        ),
-        ForeignKey(
-            entity = StudentEntity::class,
             parentColumns = ["id"],
             childColumns = ["student_id"],
             onDelete = ForeignKey.CASCADE
-        )
+        ),
+        ForeignKey(
+            entity = ClassEntity::class,
+            parentColumns = ["id"],
+            childColumns = ["class_id"],
+            onDelete = ForeignKey.CASCADE
+        ),
     ]
 )
-data class GroupStudentEntity(
+data class RelationClassPersonEntity (
-    @ColumnInfo("group_id", index = true) val groupId: Long,
     @ColumnInfo("student_id", index = true) val studentId: Long,
-) : BaseEntity()
+    @ColumnInfo("class_id", index = true) val classId: Long,
+) : BaseEntity() {
+    companion object {
+        const val TABLE_NAME = "relation_class_person"
+    }
+}

app/src/main/java/com/faraphel/tasks_valider/database/entities/SessionEntity.kt

@@ -8,7 +8,7 @@ import com.faraphel.tasks_valider.database.entities.base.BaseEntity
 import java.time.Instant
 
 @Entity(
-    tableName = "sessions",
+    tableName = SessionEntity.TABLE_NAME,
     foreignKeys = [
         ForeignKey(
             entity = ClassEntity::class,
@@ -23,5 +23,9 @@ data class SessionEntity (
     @ColumnInfo("name") val name: String? = null,
     @ColumnInfo("start") val start: Instant,
 
-    @ColumnInfo("class_id") val classId: Long? = null,
+    @ColumnInfo("class_id", index = true) val classId: Long? = null,
-) : BaseEntity()
+) : BaseEntity() {
+    companion object {
+        const val TABLE_NAME = "sessions"
+    }
+}

app/src/main/java/com/faraphel/tasks_valider/database/entities/SubjectEntity.kt

@@ -5,8 +5,12 @@ import androidx.room.Entity
 import androidx.room.PrimaryKey
 import com.faraphel.tasks_valider.database.entities.base.BaseEntity
 
-@Entity(tableName = "subjects")
+@Entity(tableName = SubjectEntity.TABLE_NAME)
 data class SubjectEntity (
     @ColumnInfo("id") @PrimaryKey(autoGenerate = true) val id: Long = 0,
     @ColumnInfo("name") val name: String,
-) : BaseEntity()
+) : BaseEntity() {
+    companion object {
+        const val TABLE_NAME = "subjects"
+    }
+}

app/src/main/java/com/faraphel/tasks_valider/database/entities/TaskEntity.kt

@@ -7,7 +7,7 @@ import androidx.room.PrimaryKey
 import com.faraphel.tasks_valider.database.entities.base.BaseEntity
 
 @Entity(
-    tableName = "tasks",
+    tableName = TaskEntity.TABLE_NAME,
     foreignKeys = [
         ForeignKey(
             entity = SubjectEntity::class,
@@ -22,5 +22,9 @@ data class TaskEntity (
     @ColumnInfo("title") val title: String,
     @ColumnInfo("description") val description: String? = null,
 
-    @ColumnInfo("subject_id") val subjectId: Long,
+    @ColumnInfo("subject_id", index = true) val subjectId: Long,
-) : BaseEntity()
+) : BaseEntity() {
+    companion object {
+        const val TABLE_NAME = "tasks"
+    }
+}

app/src/main/java/com/faraphel/tasks_valider/database/entities/TeacherEntity.kt

@@ -1,15 +0,0 @@
-package com.faraphel.tasks_valider.database.entities
-
-import androidx.room.ColumnInfo
-import androidx.room.Entity
-import androidx.room.PrimaryKey
-import com.faraphel.tasks_valider.database.entities.base.BaseEntity
-
-
-// TODO(Faraphel): is this class really required ?
-@Entity(tableName = "teachers")
-data class TeacherEntity (
-    @ColumnInfo("id") @PrimaryKey(autoGenerate = true) val id: Long = 0,
-    @ColumnInfo("first_name") val firstName: String,
-    @ColumnInfo("last_name") val lastName: String,
-) : BaseEntity()

app/src/main/java/com/faraphel/tasks_valider/database/entities/ValidationEntity.kt

@@ -7,37 +7,42 @@ import com.faraphel.tasks_valider.database.entities.base.BaseEntity
 import java.time.Instant
 
 @Entity(
-    tableName = "validations",
+    tableName = ValidationEntity.TABLE_NAME,
     primaryKeys = [
         "teacher_id",
-        "task_id",
         "student_id",
+        "task_id",
     ],
     foreignKeys = [
         ForeignKey(
-            entity = TeacherEntity::class,
+            entity = PersonEntity::class,
             parentColumns = ["id"],
             childColumns = ["teacher_id"],
             onDelete = ForeignKey.CASCADE
         ),
+        ForeignKey(
+            entity = PersonEntity::class,
+            parentColumns = ["id"],
+            childColumns = ["student_id"],
+            onDelete = ForeignKey.CASCADE
+        ),
         ForeignKey(
             entity = TaskEntity::class,
             parentColumns = ["id"],
             childColumns = ["task_id"],
             onDelete = ForeignKey.CASCADE
         ),
-        ForeignKey(
-            entity = StudentEntity::class,
-            parentColumns = ["id"],
-            childColumns = ["student_id"],
-            onDelete = ForeignKey.CASCADE
-        ),
     ]
 )
 data class ValidationEntity (
     @ColumnInfo("date") val date: Instant,
 
-    @ColumnInfo("teacher_id") val teacherId: Long,
+    @ColumnInfo("teacher_id", index = true) val teacherId: Long,
-    @ColumnInfo("task_id") val taskId: Long,
+    @ColumnInfo("student_id", index = true) val studentId: Long,
-    @ColumnInfo("student_id") val studentId: Long,
+    @ColumnInfo("task_id", index = true) val taskId: Long,
-) : BaseEntity()
+) : BaseEntity() {
+    companion object {
+        const val TABLE_NAME = "validations"
+    }
+}
+

app/src/main/java/com/faraphel/tasks_valider/database/entities/_old/GroupEntity.kt

@@ -1,14 +0,0 @@
-package com.faraphel.tasks_valider.database.entities._old
-
-import androidx.room.ColumnInfo
-import androidx.room.Entity
-import androidx.room.PrimaryKey
-import com.faraphel.tasks_valider.database.entities.base.BaseEntity
-
-
-// TODO(Faraphel): should be renamed to TeamEntity
-@Entity(tableName = "groups")
-data class GroupEntity (
-    @ColumnInfo("id") @PrimaryKey(autoGenerate = true) val id: Long = 0,
-    @ColumnInfo("name") val name: String? = null,
-) : BaseEntity()

app/src/main/java/com/faraphel/tasks_valider/database/entities/_old/PersonEntity.kt

@@ -1,19 +0,0 @@
-package com.faraphel.tasks_valider.database.entities._old
-
-import java.util.Locale
-import com.faraphel.tasks_valider.database.entities.base.BaseEntity
-
-
-open class PersonEntity (
-    open val id: Long = 0,
-    open val firstName: String,
-    open val lastName: String,
-) : BaseEntity() {
-    /**
-    Get the full name of the person
-     */
-    val fullName: String
-        get() {
-            return "${firstName.capitalize(Locale.ROOT)} ${lastName.uppercase()}"
-        }
-}

app/src/main/java/com/faraphel/tasks_valider/database/entities/_old/StudentEntity.kt

@@ -1,12 +0,0 @@
-package com.faraphel.tasks_valider.database.entities._old
-
-import androidx.room.ColumnInfo
-import androidx.room.Entity
-import androidx.room.PrimaryKey
-
-@Entity(tableName = "students")
-class StudentEntity(
-    @ColumnInfo("id") @PrimaryKey(autoGenerate = true) override val id: Long = 0,
-    @ColumnInfo("first_name") override val firstName: String,
-    @ColumnInfo("last_name") override val lastName: String
-) : PersonEntity(id, firstName, lastName)

app/src/main/java/com/faraphel/tasks_valider/database/entities/_old/TaskEntity.kt

@@ -1,13 +0,0 @@
-package com.faraphel.tasks_valider.database.entities._old
-
-import androidx.room.ColumnInfo
-import androidx.room.Entity
-import androidx.room.PrimaryKey
-import com.faraphel.tasks_valider.database.entities.base.BaseEntity
-
-@Entity(tableName = "tasks")
-data class TaskEntity (
-    @ColumnInfo("id") @PrimaryKey(autoGenerate = true) val id: Long = 0,
-    @ColumnInfo("title") val title: String,
-    @ColumnInfo("description") val description: String,
-) : BaseEntity()

app/src/main/java/com/faraphel/tasks_valider/database/entities/_old/TaskGroupEntity.kt

@@ -1,44 +0,0 @@
-package com.faraphel.tasks_valider.database.entities._old
-
-import androidx.room.ColumnInfo
-import androidx.room.Entity
-import androidx.room.ForeignKey
-import com.faraphel.tasks_valider.database.entities.base.BaseEntity
-import java.time.Instant
-
-
-@Entity(
-    tableName = "task_group",
-    primaryKeys = [
-        "task_id",
-        "group_id"
-    ],
-    foreignKeys = [
-        ForeignKey(
-            entity = GroupEntity::class,
-            parentColumns = ["id"],
-            childColumns = ["group_id"],
-            onDelete = ForeignKey.CASCADE
-        ),
-        ForeignKey(
-            entity = TaskEntity::class,
-            parentColumns = ["id"],
-            childColumns = ["task_id"],
-            onDelete = ForeignKey.CASCADE
-        ),
-        ForeignKey(
-            entity = TeacherEntity::class,
-            parentColumns = ["id"],
-            childColumns = ["approval_teacher_id"],
-            onDelete = ForeignKey.CASCADE
-        ),
-    ]
-)
-data class TaskGroupEntity (
-    @ColumnInfo("task_id") val taskId: Long,
-    @ColumnInfo("group_id") val groupId: Long,
-    @ColumnInfo("approval_status") var approvalStatus: Boolean = false,
-    @ColumnInfo("approval_teacher_id") val approvalTeacherId: Long? = null,
-    @ColumnInfo("approval_time") val approvalTime: Instant? = null
-) : BaseEntity()
-

app/src/main/java/com/faraphel/tasks_valider/database/entities/_old/TeacherEntity.kt

@@ -1,12 +0,0 @@
-package com.faraphel.tasks_valider.database.entities._old
-
-import androidx.room.ColumnInfo
-import androidx.room.Entity
-import androidx.room.PrimaryKey
-
-@Entity(tableName = "teachers")
-class TeacherEntity(
-    @ColumnInfo("id") @PrimaryKey(autoGenerate = true) override val id: Long = 0,
-    @ColumnInfo("first_name") override val firstName: String,
-    @ColumnInfo("last_name") override val lastName: String
-) : PersonEntity(id, firstName, lastName)

app/src/main/java/com/faraphel/tasks_valider/ui/screen/communication/internet/client/screen.kt

@@ -16,7 +16,7 @@ import com.faraphel.tasks_valider.connectivity.task.TaskClient
 import com.faraphel.tasks_valider.ui.screen.communication.DEFAULT_SERVER_ADDRESS
 import com.faraphel.tasks_valider.ui.screen.communication.DEFAULT_SERVER_PORT
 import com.faraphel.tasks_valider.ui.screen.communication.RANGE_SERVER_PORT
-import com.faraphel.tasks_valider.ui.screen.task.TaskGroupScreen
+import com.faraphel.tasks_valider.ui.screen.task.TaskSessionScreen
 
 
 @Composable
@@ -24,7 +24,7 @@ fun CommunicationInternetClientScreen(activity: Activity) {
     val client = remember { mutableStateOf<TaskClient?>(null) }
 
     if (client.value == null) CommunicationInternetClientContent(client)
-    else TaskGroupScreen(activity, client.value!!)
+    else TaskSessionScreen(activity, client.value!!)
 }
 
 

app/src/main/java/com/faraphel/tasks_valider/ui/screen/communication/internet/server/screen.kt

@@ -21,7 +21,7 @@ import com.faraphel.tasks_valider.connectivity.task.TaskServer
 import com.faraphel.tasks_valider.database.TaskDatabase
 import com.faraphel.tasks_valider.ui.screen.communication.DEFAULT_SERVER_PORT
 import com.faraphel.tasks_valider.ui.screen.communication.RANGE_SERVER_PORT
-import com.faraphel.tasks_valider.ui.screen.task.TaskGroupScreen
+import com.faraphel.tasks_valider.ui.screen.task.TaskSessionScreen
 
 
 @Composable
@@ -31,7 +31,7 @@ fun CommunicationInternetServerScreen(activity: Activity) {
     // if the server is not created, prompt the user for the server configuration
     if (client.value == null) CommunicationInternetServerContent(activity, client)
     // else, go to the base tasks screen
-    else TaskGroupScreen(activity, client.value!!)
+    else TaskSessionScreen(activity, client.value!!)
 }
 
 

app/src/main/java/com/faraphel/tasks_valider/ui/screen/communication/wifiP2p/server/screen.kt

@@ -22,7 +22,7 @@ import com.faraphel.tasks_valider.connectivity.task.TaskServer
 import com.faraphel.tasks_valider.database.TaskDatabase
 import com.faraphel.tasks_valider.ui.screen.communication.DEFAULT_SERVER_PORT
 import com.faraphel.tasks_valider.ui.screen.communication.RANGE_SERVER_PORT
-import com.faraphel.tasks_valider.ui.screen.task.TaskGroupScreen
+import com.faraphel.tasks_valider.ui.screen.task.TaskSessionScreen
 
 
 @Composable
@@ -32,7 +32,7 @@ fun CommunicationWifiP2pServerScreen(activity: Activity, bwfManager: BwfManager)
     // if the server is not created, prompt the user for the server configuration
     if (client.value == null) CommunicationWifiP2pServerContent(activity, bwfManager, client)
     // else, go to the base tasks screen
-    else TaskGroupScreen(activity, client.value!!)
+    else TaskSessionScreen(activity, client.value!!)
 }
 
 

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

@@ -1,28 +1,22 @@
 package com.faraphel.tasks_valider.ui.screen.task
 
 import android.app.Activity
-import android.widget.Toast
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.MutableState
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
 import com.faraphel.tasks_valider.connectivity.task.TaskClient
-import com.faraphel.tasks_valider.database.entities._old.TaskGroupEntity
-import com.google.gson.Gson
-import com.google.gson.reflect.TypeToken
-
-
-val jsonParser = Gson()
 
 
 /**
- * This screen let the user decide which student team he wants to interact with
+ * This screen represent a session
+ * @param activity the android activity
  * @param client an HTTP client that can communicate with the server
  */
 @Composable
-fun TaskGroupScreen(activity: Activity, client: TaskClient) {
+fun TaskSessionScreen(activity: Activity, client: TaskClient) {
-    val groups = remember { mutableStateOf<List<TaskGroupEntity>?>(null) }
+    Text("WIP : Session Screen")
+
+    /*
+    val students = remember { mutableStateOf<List<TaskGroupEntity>?>(null) }
 
     // title
     Text(text = "Task Group")
@@ -37,9 +31,11 @@ fun TaskGroupScreen(activity: Activity, client: TaskClient) {
     for (group in groups.value!!) {
         Text(text = group.toString())
     }
+    */
 }
 
 
+/*
 fun refreshGroups(activity: Activity, client: TaskClient, groups: MutableState<List<TaskGroupEntity>?>) {
     // try to obtain the list of groups
     val response = client.get("entities/group")
@@ -56,3 +52,4 @@ fun refreshGroups(activity: Activity, client: TaskClient, groups: MutableState<L
         object : TypeToken<List<TaskGroupEntity>>(){}
     )
 }
+*/

app/src/main/java/com/faraphel/tasks_valider/ui/widgets/task/Group.kt

@@ -1,18 +0,0 @@
-package com.faraphel.tasks_valider.ui.widgets.task
-
-import androidx.compose.foundation.layout.Column
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import com.faraphel.tasks_valider.database.entities._old.GroupEntity
-
-@Composable
-fun WidgetGroup(group: GroupEntity) {
-    // TODO
-    Column {
-        Text(text = group.name!!)
-
-        // group.tasks.forEach { task ->
-        //     WidgetTask(task)
-        // }
-    }
-}

app/src/main/java/com/faraphel/tasks_valider/ui/widgets/task/Task.kt

@@ -1,15 +0,0 @@
-package com.faraphel.tasks_valider.ui.widgets.task
-
-import androidx.compose.foundation.layout.Column
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import com.faraphel.tasks_valider.database.entities._old.TaskEntity
-
-@Composable
-fun WidgetTask(task: TaskEntity) {
-    // task information
-    Column {
-        Text(text = task.title)
-        Text(text = task.description)
-    }
-}

app/src/main/java/com/faraphel/tasks_valider/ui/widgets/task/TaskGroup.kt

@@ -1,55 +0,0 @@
-package com.faraphel.tasks_valider.ui.widgets.task
-
-import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.width
-import androidx.compose.material3.Checkbox
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.unit.dp
-import com.faraphel.tasks_valider.database.TaskDatabase
-import com.faraphel.tasks_valider.database.entities._old.TaskGroupEntity
-
-
-@Composable
-fun WidgetTaskStudent(database: TaskDatabase, taskStudent: TaskGroupEntity) {
-    val teacherDao = database.teacherDao()
-
-    Column {
-        // row for this task
-        Row {
-            // task information
-            // TODO: WidgetTask(task = taskStudent.task)
-
-            // align the other columns to the right
-            Spacer(modifier = Modifier.weight(1f))
-
-            // task status
-            Checkbox(
-                checked = taskStudent.approvalStatus,
-                onCheckedChange = { status -> taskStudent.approvalStatus = status }
-            )
-        }
-
-        // if the task has been approved
-        if (taskStudent.approvalStatus) {
-            Row (
-                modifier = Modifier.fillMaxSize(),
-                horizontalArrangement = Arrangement.Center
-            ) {
-                // teacher who approved the task
-                Text(text = teacherDao.getById(taskStudent.approvalTeacherId!!).fullName)
-
-                // align the other columns to the right
-                Spacer(modifier = Modifier.width(16.dp))
-
-                // date of approval
-                Text(text = taskStudent.approvalTime.toString())
-            }
-        }
-    }
-}