add: graphs et rushs

6 files changed, 135 insertions, 0 deletions

diff --git a/graphs/java/grades/src/main/java/fr/epita/assistants/grades/EntryNotFoundException.java b/graphs/java/grades/src/main/java/fr/epita/assistants/grades/EntryNotFoundException.java
new file mode 100644
index 0000000..fa9d24e
--- /dev/null
+++ b/graphs/java/grades/src/main/java/fr/epita/assistants/grades/EntryNotFoundException.java
@@ -0,0 +1,13 @@
+package fr.epita.assistants.grades;
+
+public class EntryNotFoundException extends RuntimeException {
+    /**
+     * @param entryClass The class of the collection's entries
+     * @param query      The string representation of the search query
+     */
+    public EntryNotFoundException(Class<?> entryClass, String query) {
+        super(String.format("%s not found for: `%s`",
+                            entryClass.getSimpleName(),
+                            query));
+    }
+}
diff --git a/graphs/java/grades/src/main/java/fr/epita/assistants/grades/GradeHandler.java b/graphs/java/grades/src/main/java/fr/epita/assistants/grades/GradeHandler.java
new file mode 100644
index 0000000..91da40b
--- /dev/null
+++ b/graphs/java/grades/src/main/java/fr/epita/assistants/grades/GradeHandler.java
@@ -0,0 +1,98 @@
+package fr.epita.assistants.grades;
+
+import fr.epita.assistants.grades.model.*;
+
+import java.util.*;
+import java.util.function.*;
+import java.util.stream.*;
+
+public class GradeHandler {
+    private final List<Activity> activities;
+    private final List<Student> students;
+
+    public GradeHandler() {
+        this.activities = new ArrayList<>();
+        this.students = new ArrayList<>();
+    }
+
+    /**
+     * @param activity The {@link Activity} to be added
+     * @return {@code true} (as specified by {@link List#add})
+     */
+    public boolean addActivity(Activity activity) {
+        this.activities.add(activity);
+        return true;
+    }
+
+    /**
+     * @param student The {@link Student} to be added
+     * @return {@code true} (as specified by {@link List#add})
+     */
+    public boolean addStudent(Student student) {
+        students.add(student);
+        return true;
+    }
+
+    /**
+     * @param name The name of the desired {@link Student}
+     * @return The desired student
+     * @throws EntryNotFoundException No known {@link Student} with the given name
+     */
+    public Student getStudent(String name) throws EntryNotFoundException {
+        Optional<Student> o = students.stream().filter(i -> i.name().equals(name)).findFirst();
+        if (o.isEmpty())
+            throw new EntryNotFoundException(Student.class, name);
+        else
+            return o.get();
+    }
+
+    /**
+     * @param grade The {@link Grade} to be added to the {@link Student}
+     * @param name  The name of the desired {@link Student}
+     * @return {@code true} (as specified by {@link List#add})
+     * @throws EntryNotFoundException No known {@link Student} with the given name
+     */
+    public boolean addGradeToStudent(Grade grade, String name) throws EntryNotFoundException {
+        getStudent(name).grades().add(grade);
+        return true;
+    }
+
+    /**
+     * @param name The name of the desired {@link Student} to remove
+     * @return The removed {@link Student}
+     * @throws EntryNotFoundException No known {@link Student} with the given name
+     */
+    public Student removeStudent(String name) throws EntryNotFoundException {
+        Student s = getStudent(name);
+        students.remove(getStudent(name));
+        return s;
+    }
+
+    /**
+     * @param name     The name of the desired {@link Student}
+     * @param function A {@link Function} returning an updated {@link Student} from the given one
+     * @throws EntryNotFoundException No known {@link Student} with the given name
+     */
+    public void updateStudent(String name, Function<Student, Student> function) throws EntryNotFoundException {
+        addStudent(function.apply(removeStudent(name)));
+    }
+
+    /**
+     * @param name    The name of the {@link Student} from which to get grades
+     * @param subject The {@link Subject} from which we want the student's average
+     * @return The student's average grade in the specified subject (0 if no grades are available)
+     * @throws EntryNotFoundException No known {@link Student} with the given name
+     */
+    public double getStudentAverageInSubject(String name, Subject subject) throws EntryNotFoundException {
+        Optional<Student> o = students.stream().filter(i -> i.name().equals(name)).findFirst();
+        if (o.isPresent()) {
+            Student s = o.get();
+            OptionalDouble d = s.grades().stream().filter(g -> g.activity().subject() == subject).mapToDouble(Grade::grade).average();
+            if (d.isEmpty())
+                return 0.0;
+            else return d.getAsDouble();
+        }
+        else
+            throw new EntryNotFoundException(getClass(), name);
+    }
+}
diff --git a/graphs/java/grades/src/main/java/fr/epita/assistants/grades/model/Activity.java b/graphs/java/grades/src/main/java/fr/epita/assistants/grades/model/Activity.java
new file mode 100644
index 0000000..fe3e285
--- /dev/null
+++ b/graphs/java/grades/src/main/java/fr/epita/assistants/grades/model/Activity.java
@@ -0,0 +1,4 @@
+package fr.epita.assistants.grades.model;
+
+public record Activity(String name, Subject subject, float weight) {
+}
diff --git a/graphs/java/grades/src/main/java/fr/epita/assistants/grades/model/Grade.java b/graphs/java/grades/src/main/java/fr/epita/assistants/grades/model/Grade.java
new file mode 100644
index 0000000..fb63a6c
--- /dev/null
+++ b/graphs/java/grades/src/main/java/fr/epita/assistants/grades/model/Grade.java
@@ -0,0 +1,4 @@
+package fr.epita.assistants.grades.model;
+
+public record Grade(Activity activity, int grade) {
+}
diff --git a/graphs/java/grades/src/main/java/fr/epita/assistants/grades/model/Student.java b/graphs/java/grades/src/main/java/fr/epita/assistants/grades/model/Student.java
new file mode 100644
index 0000000..335e073
--- /dev/null
+++ b/graphs/java/grades/src/main/java/fr/epita/assistants/grades/model/Student.java
@@ -0,0 +1,8 @@
+package fr.epita.assistants.grades.model;
+
+import lombok.Builder;
+
+import java.util.List;
+
+@Builder
+public record Student(String name, int age, List<Grade> grades) {}
diff --git a/graphs/java/grades/src/main/java/fr/epita/assistants/grades/model/Subject.java b/graphs/java/grades/src/main/java/fr/epita/assistants/grades/model/Subject.java
new file mode 100644
index 0000000..00bc685
--- /dev/null
+++ b/graphs/java/grades/src/main/java/fr/epita/assistants/grades/model/Subject.java
@@ -0,0 +1,8 @@
+package fr.epita.assistants.grades.model;
+
+public enum Subject {
+    STEMS,
+    SHAPE,
+    HEAL,
+    Maths;
+}