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siro_rider/packages/calendar_builder/lib/src/controllers/cb_controller.dart

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+import '../models/cb_config.dart';
+
+import 'package:get/get.dart';
+
+///Main controller for all the datas
+class CbController extends GetxController {
+  ///data configuration  for [cbcontroller]
+  CbConfig? cbConfig;
+
+  ///add config
+  void changeConfig(CbConfig config) {
+    cbConfig = config;
+  }
+}

siro_rider/packages/calendar_builder/lib/src/controllers/month_builder_controller.dart

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+import 'package:get/get.dart';
+import '../../calendar_builder.dart';
+
+/// State manager or  controller of MonthBuilder
+class MonthBuilderController extends GetxController {
+  ///startDate of month
+  DateTime mStartDate = DateTime(DateTime.now().year);
+
+  /// EndDate of month
+  /// default one year greater than [mStartDate]
+  /// [endDate] should be greater than [startDate]
+  DateTime mEndDate =
+      DateTime(DateTime.now().year + 20).subtract(const Duration(days: 1));
+
+  ///Current day/Todays Date of Birth"
+  ///default = now
+  DateTime mCurrentDay = DateTime.now();
+
+  ///this contains all the  [DateTime] from [mStartDate] to [mEndDate] with [mEndDate]+its full year
+  ///!minimum 1 year dates will be there
+  late List<DateTime> mAllDates;
+
+  ///this contains all the  [DateTime] from [mStartDate] to [mEndDate]
+  late List<DateTime> mStartToEndDates;
+
+  ///this contains all the dateTime sorted in the basis of years from [mStartDate] to [mEndDate]
+  ///!minimum 1 year  will be there
+  late List<DateTime> mAllYears;
+
+  ///lits of 16 dates for year dropDown
+  late List<DateTime> m16DateTimeYears;
+
+  ///Slected Date
+  ///default = [mStartDate]
+  DateTime mSelectedDate = DateTime.now();
+
+  ///Slected Year
+  ///default = [DateTime(mStartDate.year)]
+  DateTime mSelectedYear = DateTime(DateTime.now().year);
+
+  ///all events dates
+  List<DateTime> mEventDates = [];
+
+  ///all disabled dates
+  List<DateTime> mDisabledDates = [];
+
+  ///all hilighted dates
+  List<DateTime> mHighlightedDates = [];
+
+  ///weeek start from
+  ///default = `WeekStartsFrom.sunday`
+  WeekStartsFrom mWeekStartsFrom = WeekStartsFrom.sunday;
+
+  ///used to improve the performance of [monthBuilder]
+  ///wee add all the datas using [addToSavedMonthDates] function
+  ///and theen [savedMonthRemover] this function removers dates
+  ///if [savedMonthDatas.length] exceeds 3
+  ///
+  List<DateTime> savedMonthDatas = [];
+
+  ///removed date from [savedMonthDatas]
+  DateTime? removedDate;
+
+  ///all month start up logic
+  void _logicInitialization() {
+    ///alll the dates form [mStartDate] to [mEndDate]
+    mStartToEndDates =
+        DateUtilsCB.getDaysInBeteween(startDate: mStartDate, endDate: mEndDate);
+
+    ///all the dates in each the year
+    mAllDates = DateUtilsCB.getAllDaysInBetweenYears(
+        startDate: mStartDate, endDate: mEndDate);
+
+    ///gets all the years form [mStartDate] to [mEndDate]
+    mAllYears = DateUtilsCB.getYearsInBeteween(
+        startDate: mStartDate, endDate: mEndDate);
+
+    _yearBuilderLogic();
+  }
+
+  ///configaration for month builder
+  void config({CbConfig? config, bool useOnHotReload = false}) {
+    if (useOnHotReload == false) {
+      mStartDate = config?.startDate ?? DateTime(DateTime.now().year);
+    }
+    mEndDate = config?.endDate ??
+        DateTime(DateTime.now().year + 20).subtract(const Duration(days: 1));
+
+    ///
+    if (useOnHotReload == false) {
+      mSelectedDate = config?.selectedDate ?? DateTime.now();
+      mSelectedYear = config?.selectedYear ?? DateTime(mStartDate.year);
+    }
+    mCurrentDay = config?.currentDay ?? DateTime.now();
+    mWeekStartsFrom = config?.weekStartsFrom ?? WeekStartsFrom.sunday;
+    mEventDates = config?.eventDates ?? [];
+    mHighlightedDates = config?.highlightedDates ?? [];
+    mDisabledDates = config?.disabledDates ?? [];
+    _logicInitialization();
+  }
+
+  ///For Improving Performace
+  ///Add selectedYear to savedMonthDatas --- to save data
+  void addToSavedMonthDates(DateTime date) {
+    savedMonthDatas.add(date);
+    savedMonthDatas = savedMonthDatas.toSet().toList();
+  }
+
+  ///For Improving Performace
+  ///to check wether the saved month size exceeds 3
+  ///if excedes it removes previous cached datas
+  void savedMonthRemover(DateTime date) {
+    CalendarGlobals.debugLogs('-----$date');
+    if (savedMonthDatas.length > 3) {
+      if (savedMonthDatas[0] != date) {
+        removedDate = savedMonthDatas[0];
+        savedMonthDatas.removeAt(0);
+        update(['removedDate:$removedDate!']);
+        CalendarGlobals.debugLogs('removedDate:$removedDate!');
+      } else {
+        removedDate = null;
+      }
+    } else {
+      removedDate = null;
+    }
+  }
+
+  ///Checking  [mAllYears]
+  ///because to get alll the 16 days to fill the boxes in [UI]
+  void _yearBuilderLogic() {
+    if (mAllYears.length < 16) {
+      m16DateTimeYears = DateUtilsCB.getYearsInBeteween(
+        startDate: mStartDate,
+        endDate: DateTime(mAllYears.last.year + (16 - (mAllYears.length))),
+      );
+    } else {
+      m16DateTimeYears = [];
+    }
+  }
+
+  ///fuction to update Selected Date [mSelectedDate]
+  void changeSelectedDate({
+    required DateTime selectedDate,
+    DateTime? oldSelectedDate,
+    required String commonUpdateId,
+    String? updateId,
+    bool updateByID = false,
+  }) {
+    mSelectedDate = selectedDate;
+    //common update Id for date changes
+    update([commonUpdateId]);
+    CalendarGlobals.debugLogs('old:$oldSelectedDate');
+    CalendarGlobals.debugLogs('selcted:$selectedDate');
+    if (updateByID && oldSelectedDate != null && updateId != null) {
+      update([selectedDate, oldSelectedDate, updateId]);
+    } else {
+      update();
+    }
+  }
+
+  ///fuction to update Selected Date [mSelectedYear]
+  void changeSelectedYear({
+    required DateTime selectedYear,
+    DateTime? oldSelectedYear,
+    required String commonUpdateId,
+    String? updateId,
+    bool updateByID = false,
+  }) {
+    mSelectedYear = selectedYear;
+    //common update Id for date changes
+    update([commonUpdateId]);
+
+    if (updateByID && oldSelectedYear != null && updateId != null) {
+      update([selectedYear, oldSelectedYear, updateId]);
+    } else {
+      update();
+    }
+  }
+}

siro_rider/packages/calendar_builder/lib/src/controllers/month_ui_controller.dart

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+import 'package:flutter/cupertino.dart';
+import 'package:get/get.dart';
+
+import '../../calendar_builder.dart';
+
+///this controller is used to controll  the state of the [month_builder] ui
+class MonthUiController extends GetxController {
+  ///checking wether the yer picker is expanded or not
+  bool isYearPickerExpanded = false;
+
+  ///Page controller for Month
+  late PageController mPageController;
+
+  ///callback when year header is expanded
+  void Function(bool isExpanded)? onYearHeaderExpanded;
+
+  /// callback when year button is clicked
+  void Function(DateTime selectedYear, bool isSelected)? onYearButtonClicked;
+
+  /// callback when date button is clicked
+  void Function(OnDateSelected onDateSelected)? onDateClicked;
+
+  ///used to chage the expanded or not-expanded , state of year picker
+  void chageYearExpanded(
+      {String? updateId,
+      required String commonUpdateId,
+      required bool isExpanded}) {
+    ///if its aldready in the same state then it will  not update
+    if (isYearPickerExpanded != isExpanded) {
+      isYearPickerExpanded = isExpanded;
+
+      ///common update Id for year picker expanded
+      update([commonUpdateId]);
+      if (updateId != null) {
+        update([updateId]);
+      } else {
+        update();
+      }
+    }
+  }
+
+  ///checking for year dropdown should be expanded initially or not
+  void expandInitiaally(bool isExpanded) {
+    isYearPickerExpanded = isExpanded;
+  }
+}