create Presenter

app/src/main/java/org/cutem/cutecalendar/presenter/CalendarUnit.java

@@ -0,0 +1,76 @@
+package org.cutem.cutecalendar.presenter;
+
+class CalendarUnit {
+
+    public static final int TODAY_FLAG = 1;
+
+    public static final int HAVE_TODO_FLAG = 1 << 1;
+
+    public static final int HOLIDAY_FLAG = 1 << 2;
+
+    public static final int WORKDAY_FLAG = 1 << 3;
+    private final String mFestival;
+    private int mFlags;
+
+
+    private CalendarUnit(int flags, String festival) {
+        mFlags = flags;
+        mFestival = festival;
+    }
+
+    public static CalendarUnit constructUnit(int flags, String festival) {
+        return new CalendarUnit(flags, festival);
+    }
+
+    public static CalendarUnit constructUnit(
+            boolean todayFlag,
+            boolean haveTodoFlag,
+            boolean holidayFlag,
+            boolean workdayFlag,
+            String festival) {
+
+        int flags = 0;
+        if (todayFlag) {
+            flags |= TODAY_FLAG;
+        }
+        if (haveTodoFlag) {
+            flags |= HAVE_TODO_FLAG;
+        }
+        if (holidayFlag) {
+            flags |= HOLIDAY_FLAG;
+        }
+        if (workdayFlag) {
+            flags |= WORKDAY_FLAG;
+        }
+        return constructUnit(flags, festival);
+    }
+
+    public static CalendarUnit constructUnitWithoutFestival(int flags) {
+        return constructUnit(flags, null);
+    }
+
+    public static CalendarUnit constructUnitWithoutFestival(
+            boolean todayFlag,
+            boolean haveTodoFlag,
+            boolean holidayFlag,
+            boolean workdayFlag) {
+        return constructUnit(todayFlag, haveTodoFlag, holidayFlag, workdayFlag, null);
+    }
+
+    public int getFlags() {
+        return mFlags;
+    }
+
+    public boolean isSetFlag(int mask) {
+        return (mFlags & mask) != 0;
+    }
+
+    public boolean isFestival() {
+        return mFestival != null;
+    }
+
+    public String getFestivalName() {
+        return mFestival;
+    }
+
+}

app/src/main/java/org/cutem/cutecalendar/presenter/Presenter.java

@@ -0,0 +1,66 @@
+package org.cutem.cutecalendar.presenter;
+
+import org.cutem.cutecalendar.model.TodoItem;
+import org.cutem.cutecalendar.model.TodoItemManager;
+import org.cutem.cutecalendar.util.CalendarUtil;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.List;
+
+public abstract class Presenter {
+
+    private TodoItemManager manager = TodoItemManager.getInstance();
+
+    abstract Calendar getCalendarShowingDate();
+
+
+    abstract void showTodoItemDetail(TodoItem item);
+
+    abstract void showNewTodoItemStage();
+
+
+    void addTodoItem(@NotNull TodoItem item) {
+        manager.add(item);
+        paintCalendar(getCalendarShowingDate());
+    }
+
+    void removeTodoItem(@NotNull TodoItem item) {
+        manager.remove(item);
+        paintCalendar(getCalendarShowingDate());
+    }
+
+
+    abstract void paintCalendar(@NotNull Calendar date, @NotNull List<CalendarUnit> days);
+
+    void paintCalendar(@NotNull Calendar date) {
+        Calendar c1 = CalendarUtil.getMonthBegin(date);
+        Calendar c2 = CalendarUtil.getMonthEnd(date);
+        Calendar today = Calendar.getInstance();
+
+        ArrayList<CalendarUnit> days = new ArrayList<>();
+        while (!c1.after(c2)) {
+            int flags = 0;
+            if (CalendarUtil.isSameDay(c1, today)) {
+                flags |= CalendarUnit.TODAY_FLAG;
+            }
+            if (manager.haveTodoItemOnSomeday(c1)) {
+                flags |= CalendarUnit.HAVE_TODO_FLAG;
+            }
+            // todo: holiday flag and workday flag and festival
+
+            CalendarUnit unit = CalendarUnit.constructUnit(flags, null);
+            days.add(unit);
+        }
+
+        paintCalendar(date, days);
+    }
+
+    abstract void listTodoItems(List<TodoItem> items);
+
+    void listTodoItemDuring(Calendar from, Calendar to) {
+        listTodoItems(manager.queryTodoItemsDuring(from, to));
+    }
+
+}